/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/test-easy11.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 12:00:55,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 12:00:55,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 12:00:55,973 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 12:00:55,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 12:00:55,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 12:00:55,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 12:00:55,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 12:00:55,980 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 12:00:55,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 12:00:55,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 12:00:55,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 12:00:55,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 12:00:55,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 12:00:55,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 12:00:55,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 12:00:55,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 12:00:55,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 12:00:55,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 12:00:55,996 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 12:00:55,997 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 12:00:55,997 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 12:00:55,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 12:00:55,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 12:00:56,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 12:00:56,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 12:00:56,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 12:00:56,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 12:00:56,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 12:00:56,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 12:00:56,007 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 12:00:56,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 12:00:56,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 12:00:56,009 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 12:00:56,010 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 12:00:56,010 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 12:00:56,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 12:00:56,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 12:00:56,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 12:00:56,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 12:00:56,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 12:00:56,013 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 12:00:56,033 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 12:00:56,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 12:00:56,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 12:00:56,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 12:00:56,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 12:00:56,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 12:00:56,035 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 12:00:56,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 12:00:56,035 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 12:00:56,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 12:00:56,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 12:00:56,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 12:00:56,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 12:00:56,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 12:00:56,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 12:00:56,036 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 12:00:56,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 12:00:56,036 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 12:00:56,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 12:00:56,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 12:00:56,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 12:00:56,037 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 12:00:56,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 12:00:56,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 12:00:56,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 12:00:56,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 12:00:56,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 12:00:56,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 12:00:56,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 12:00:56,038 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 12:00:56,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 12:00:56,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 12:00:56,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 12:00:56,237 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 12:00:56,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 12:00:56,240 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 12:00:56,240 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 12:00:56,241 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-01-28 12:00:57,457 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 12:00:57,728 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 12:00:57,729 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-01-28 12:00:57,736 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff285463/75d39397a696438997b0a0615eb20a38/FLAGc998f2ac5 [2023-01-28 12:00:57,767 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff285463/75d39397a696438997b0a0615eb20a38 [2023-01-28 12:00:57,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 12:00:57,770 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 12:00:57,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 12:00:57,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 12:00:57,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 12:00:57,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:00:57" (1/1) ... [2023-01-28 12:00:57,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a983fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:57, skipping insertion in model container [2023-01-28 12:00:57,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 12:00:57" (1/1) ... [2023-01-28 12:00:57,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 12:00:57,825 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 12:00:58,048 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/test-easy11.wvr.c[2005,2018] [2023-01-28 12:00:58,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 12:00:58,072 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 12:00:58,105 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/test-easy11.wvr.c[2005,2018] [2023-01-28 12:00:58,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 12:00:58,114 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 12:00:58,115 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 12:00:58,119 INFO L208 MainTranslator]: Completed translation [2023-01-28 12:00:58,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58 WrapperNode [2023-01-28 12:00:58,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 12:00:58,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 12:00:58,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 12:00:58,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 12:00:58,142 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (1/1) ... [2023-01-28 12:00:58,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (1/1) ... [2023-01-28 12:00:58,177 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-01-28 12:00:58,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 12:00:58,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 12:00:58,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 12:00:58,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 12:00:58,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (1/1) ... [2023-01-28 12:00:58,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (1/1) ... [2023-01-28 12:00:58,208 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (1/1) ... [2023-01-28 12:00:58,209 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (1/1) ... [2023-01-28 12:00:58,218 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (1/1) ... [2023-01-28 12:00:58,220 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (1/1) ... [2023-01-28 12:00:58,223 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (1/1) ... [2023-01-28 12:00:58,224 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (1/1) ... [2023-01-28 12:00:58,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 12:00:58,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 12:00:58,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 12:00:58,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 12:00:58,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (1/1) ... [2023-01-28 12:00:58,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 12:00:58,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:00:58,278 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 12:00:58,294 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 12:00:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 12:00:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 12:00:58,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 12:00:58,306 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 12:00:58,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 12:00:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 12:00:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 12:00:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 12:00:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 12:00:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 12:00:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 12:00:58,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 12:00:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 12:00:58,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 12:00:58,308 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 12:00:58,369 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 12:00:58,370 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 12:00:58,486 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 12:00:58,490 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 12:00:58,490 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 12:00:58,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:00:58 BoogieIcfgContainer [2023-01-28 12:00:58,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 12:00:58,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 12:00:58,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 12:00:58,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 12:00:58,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 12:00:57" (1/3) ... [2023-01-28 12:00:58,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a29fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:00:58, skipping insertion in model container [2023-01-28 12:00:58,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 12:00:58" (2/3) ... [2023-01-28 12:00:58,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75a29fda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 12:00:58, skipping insertion in model container [2023-01-28 12:00:58,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 12:00:58" (3/3) ... [2023-01-28 12:00:58,497 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2023-01-28 12:00:58,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 12:00:58,508 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 12:00:58,508 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 12:00:58,556 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 12:00:58,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2023-01-28 12:00:58,612 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2023-01-28 12:00:58,612 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 12:00:58,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-01-28 12:00:58,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2023-01-28 12:00:58,624 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2023-01-28 12:00:58,626 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 12:00:58,631 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2023-01-28 12:00:58,633 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2023-01-28 12:00:58,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2023-01-28 12:00:58,647 INFO L130 PetriNetUnfolder]: 6/71 cut-off events. [2023-01-28 12:00:58,647 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 12:00:58,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-01-28 12:00:58,648 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-01-28 12:01:00,131 INFO L134 LiptonReduction]: Checked pairs total: 581 [2023-01-28 12:01:00,131 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-01-28 12:01:00,150 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 12:01:00,158 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;@196554b4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 12:01:00,158 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 12:01:00,166 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 12:01:00,167 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 12:01:00,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:00,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:00,168 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 12:01:00,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:00,174 INFO L85 PathProgramCache]: Analyzing trace with hash -69252771, now seen corresponding path program 1 times [2023-01-28 12:01:00,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:00,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028109789] [2023-01-28 12:01:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:00,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:00,569 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 12:01:00,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:00,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028109789] [2023-01-28 12:01:00,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028109789] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:00,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:00,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:00,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075882209] [2023-01-28 12:01:00,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:00,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 12:01:00,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:00,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 12:01:00,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-01-28 12:01:00,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-01-28 12:01:00,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:00,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:00,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-01-28 12:01:00,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:00,693 INFO L130 PetriNetUnfolder]: 58/106 cut-off events. [2023-01-28 12:01:00,693 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-01-28 12:01:00,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 106 events. 58/106 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 248 event pairs, 11 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 180. Up to 48 conditions per place. [2023-01-28 12:01:00,695 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 26 selfloop transitions, 10 changer transitions 5/41 dead transitions. [2023-01-28 12:01:00,695 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 41 transitions, 185 flow [2023-01-28 12:01:00,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 12:01:00,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 12:01:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 413 transitions. [2023-01-28 12:01:00,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2023-01-28 12:01:00,706 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 413 transitions. [2023-01-28 12:01:00,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 413 transitions. [2023-01-28 12:01:00,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:00,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 413 transitions. [2023-01-28 12:01:00,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.0) internal successors, (413), 7 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:00,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:00,714 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:00,716 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 413 transitions. [2023-01-28 12:01:00,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 41 transitions, 185 flow [2023-01-28 12:01:00,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 12:01:00,719 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 101 flow [2023-01-28 12:01:00,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=101, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-01-28 12:01:00,722 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-01-28 12:01:00,722 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 101 flow [2023-01-28 12:01:00,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:00,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:00,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:00,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 12:01:00,723 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 12:01:00,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:00,723 INFO L85 PathProgramCache]: Analyzing trace with hash 758171711, now seen corresponding path program 2 times [2023-01-28 12:01:00,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:00,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470320180] [2023-01-28 12:01:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:00,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:00,848 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 12:01:00,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:00,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470320180] [2023-01-28 12:01:00,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470320180] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:00,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:00,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:00,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843881808] [2023-01-28 12:01:00,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:00,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 12:01:00,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:00,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 12:01:00,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-01-28 12:01:00,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-01-28 12:01:00,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 101 flow. Second operand has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:00,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:00,852 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-01-28 12:01:00,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:00,946 INFO L130 PetriNetUnfolder]: 96/166 cut-off events. [2023-01-28 12:01:00,946 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-01-28 12:01:00,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 166 events. 96/166 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 476 event pairs, 11 based on Foata normal form. 1/167 useless extension candidates. Maximal degree in co-relation 499. Up to 69 conditions per place. [2023-01-28 12:01:00,948 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 39 selfloop transitions, 14 changer transitions 5/58 dead transitions. [2023-01-28 12:01:00,948 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 58 transitions, 333 flow [2023-01-28 12:01:00,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 12:01:00,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 12:01:00,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 421 transitions. [2023-01-28 12:01:00,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40913508260447035 [2023-01-28 12:01:00,950 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 421 transitions. [2023-01-28 12:01:00,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 421 transitions. [2023-01-28 12:01:00,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:00,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 421 transitions. [2023-01-28 12:01:00,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.142857142857146) internal successors, (421), 7 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:00,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:00,954 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:00,955 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 101 flow. Second operand 7 states and 421 transitions. [2023-01-28 12:01:00,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 58 transitions, 333 flow [2023-01-28 12:01:00,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 58 transitions, 325 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 12:01:00,957 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 198 flow [2023-01-28 12:01:00,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-01-28 12:01:00,957 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-01-28 12:01:00,957 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 198 flow [2023-01-28 12:01:00,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:00,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:00,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:00,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 12:01:00,958 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 12:01:00,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:00,959 INFO L85 PathProgramCache]: Analyzing trace with hash 649780581, now seen corresponding path program 3 times [2023-01-28 12:01:00,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:00,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516373320] [2023-01-28 12:01:00,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:00,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:01,071 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 12:01:01,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516373320] [2023-01-28 12:01:01,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516373320] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:01,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:01,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:01,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532219413] [2023-01-28 12:01:01,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:01,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 12:01:01,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:01,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 12:01:01,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-01-28 12:01:01,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-01-28 12:01:01,074 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,074 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:01,074 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-01-28 12:01:01,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:01,167 INFO L130 PetriNetUnfolder]: 112/190 cut-off events. [2023-01-28 12:01:01,167 INFO L131 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2023-01-28 12:01:01,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 190 events. 112/190 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 533 event pairs, 12 based on Foata normal form. 1/191 useless extension candidates. Maximal degree in co-relation 752. Up to 108 conditions per place. [2023-01-28 12:01:01,169 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 33 selfloop transitions, 21 changer transitions 6/60 dead transitions. [2023-01-28 12:01:01,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 60 transitions, 460 flow [2023-01-28 12:01:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 12:01:01,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 12:01:01,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 412 transitions. [2023-01-28 12:01:01,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003887269193392 [2023-01-28 12:01:01,171 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 412 transitions. [2023-01-28 12:01:01,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 412 transitions. [2023-01-28 12:01:01,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:01,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 412 transitions. [2023-01-28 12:01:01,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 58.857142857142854) internal successors, (412), 7 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,174 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,175 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 198 flow. Second operand 7 states and 412 transitions. [2023-01-28 12:01:01,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 60 transitions, 460 flow [2023-01-28 12:01:01,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 60 transitions, 423 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-01-28 12:01:01,178 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 331 flow [2023-01-28 12:01:01,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=331, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-01-28 12:01:01,179 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-01-28 12:01:01,179 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 331 flow [2023-01-28 12:01:01,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:01,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:01,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 12:01:01,179 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 12:01:01,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:01,180 INFO L85 PathProgramCache]: Analyzing trace with hash -96540297, now seen corresponding path program 4 times [2023-01-28 12:01:01,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:01,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408588470] [2023-01-28 12:01:01,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:01,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:01,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:01,292 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 12:01:01,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:01,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408588470] [2023-01-28 12:01:01,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408588470] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:01,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:01,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:01,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519999403] [2023-01-28 12:01:01,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:01,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 12:01:01,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:01,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 12:01:01,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-01-28 12:01:01,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-01-28 12:01:01,295 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,295 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:01,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-01-28 12:01:01,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:01,395 INFO L130 PetriNetUnfolder]: 115/197 cut-off events. [2023-01-28 12:01:01,395 INFO L131 PetriNetUnfolder]: For 399/399 co-relation queries the response was YES. [2023-01-28 12:01:01,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 197 events. 115/197 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 587 event pairs, 11 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 851. Up to 116 conditions per place. [2023-01-28 12:01:01,397 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 38 selfloop transitions, 23 changer transitions 5/66 dead transitions. [2023-01-28 12:01:01,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 553 flow [2023-01-28 12:01:01,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 12:01:01,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 12:01:01,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 418 transitions. [2023-01-28 12:01:01,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4062196307094266 [2023-01-28 12:01:01,399 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 418 transitions. [2023-01-28 12:01:01,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 418 transitions. [2023-01-28 12:01:01,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:01,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 418 transitions. [2023-01-28 12:01:01,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.714285714285715) internal successors, (418), 7 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,402 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,402 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 331 flow. Second operand 7 states and 418 transitions. [2023-01-28 12:01:01,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 553 flow [2023-01-28 12:01:01,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 527 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-01-28 12:01:01,405 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 410 flow [2023-01-28 12:01:01,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=410, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-01-28 12:01:01,406 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-01-28 12:01:01,406 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 410 flow [2023-01-28 12:01:01,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:01,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:01,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 12:01:01,407 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 12:01:01,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:01,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1023964675, now seen corresponding path program 5 times [2023-01-28 12:01:01,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:01,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034210264] [2023-01-28 12:01:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:01,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:01,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:01,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034210264] [2023-01-28 12:01:01,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034210264] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:01,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:01,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:01,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772223700] [2023-01-28 12:01:01,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:01,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 12:01:01,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:01,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 12:01:01,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-01-28 12:01:01,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-01-28 12:01:01,521 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,521 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:01,521 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-01-28 12:01:01,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:01,611 INFO L130 PetriNetUnfolder]: 121/207 cut-off events. [2023-01-28 12:01:01,611 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2023-01-28 12:01:01,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 207 events. 121/207 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 638 event pairs, 8 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 990. Up to 123 conditions per place. [2023-01-28 12:01:01,613 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 40 selfloop transitions, 28 changer transitions 5/73 dead transitions. [2023-01-28 12:01:01,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 708 flow [2023-01-28 12:01:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 12:01:01,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 12:01:01,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 414 transitions. [2023-01-28 12:01:01,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40233236151603496 [2023-01-28 12:01:01,614 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 414 transitions. [2023-01-28 12:01:01,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 414 transitions. [2023-01-28 12:01:01,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:01,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 414 transitions. [2023-01-28 12:01:01,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.142857142857146) internal successors, (414), 7 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,617 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,617 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,617 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 410 flow. Second operand 7 states and 414 transitions. [2023-01-28 12:01:01,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 708 flow [2023-01-28 12:01:01,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 73 transitions, 646 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-01-28 12:01:01,620 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 530 flow [2023-01-28 12:01:01,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-01-28 12:01:01,621 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2023-01-28 12:01:01,621 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 530 flow [2023-01-28 12:01:01,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:01,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:01,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 12:01:01,622 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 12:01:01,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:01,622 INFO L85 PathProgramCache]: Analyzing trace with hash -232545019, now seen corresponding path program 6 times [2023-01-28 12:01:01,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:01,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351509511] [2023-01-28 12:01:01,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:01,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:01,701 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 12:01:01,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:01,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351509511] [2023-01-28 12:01:01,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351509511] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:01,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:01,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:01,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549063896] [2023-01-28 12:01:01,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:01,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 12:01:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:01,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 12:01:01,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-01-28 12:01:01,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-01-28 12:01:01,704 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 530 flow. Second operand has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,704 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:01,704 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-01-28 12:01:01,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:01,815 INFO L130 PetriNetUnfolder]: 126/216 cut-off events. [2023-01-28 12:01:01,815 INFO L131 PetriNetUnfolder]: For 795/795 co-relation queries the response was YES. [2023-01-28 12:01:01,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1113 conditions, 216 events. 126/216 cut-off events. For 795/795 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 654 event pairs, 18 based on Foata normal form. 1/217 useless extension candidates. Maximal degree in co-relation 1088. Up to 130 conditions per place. [2023-01-28 12:01:01,817 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 41 selfloop transitions, 29 changer transitions 5/75 dead transitions. [2023-01-28 12:01:01,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 781 flow [2023-01-28 12:01:01,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 12:01:01,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 12:01:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 416 transitions. [2023-01-28 12:01:01,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042759961127308 [2023-01-28 12:01:01,819 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 416 transitions. [2023-01-28 12:01:01,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 416 transitions. [2023-01-28 12:01:01,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:01,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 416 transitions. [2023-01-28 12:01:01,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 59.42857142857143) internal successors, (416), 7 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,821 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,822 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 530 flow. Second operand 7 states and 416 transitions. [2023-01-28 12:01:01,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 781 flow [2023-01-28 12:01:01,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 741 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-01-28 12:01:01,826 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 613 flow [2023-01-28 12:01:01,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=613, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-01-28 12:01:01,826 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-01-28 12:01:01,827 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 613 flow [2023-01-28 12:01:01,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 54.857142857142854) internal successors, (384), 7 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:01,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:01,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 12:01:01,827 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 12:01:01,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2077625246, now seen corresponding path program 1 times [2023-01-28 12:01:01,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:01,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264908612] [2023-01-28 12:01:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:01,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:01,854 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 12:01:01,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:01,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264908612] [2023-01-28 12:01:01,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264908612] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:01,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131184417] [2023-01-28 12:01:01,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:01,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:01,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:01,857 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 12:01:01,922 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 12:01:01,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:01,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 12:01:01,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:01,971 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 12:01:01,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:01,996 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 12:01:01,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131184417] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:01,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 12:01:01,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2023-01-28 12:01:01,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611912247] [2023-01-28 12:01:01,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:01,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:01,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:01,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:01,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-28 12:01:01,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:01,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 613 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:01,999 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:01,999 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:01,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:02,065 INFO L130 PetriNetUnfolder]: 131/230 cut-off events. [2023-01-28 12:01:02,066 INFO L131 PetriNetUnfolder]: For 1083/1083 co-relation queries the response was YES. [2023-01-28 12:01:02,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 230 events. 131/230 cut-off events. For 1083/1083 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 750 event pairs, 10 based on Foata normal form. 8/238 useless extension candidates. Maximal degree in co-relation 1221. Up to 102 conditions per place. [2023-01-28 12:01:02,068 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 62 selfloop transitions, 18 changer transitions 0/80 dead transitions. [2023-01-28 12:01:02,068 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 891 flow [2023-01-28 12:01:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:01:02,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:01:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2023-01-28 12:01:02,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-01-28 12:01:02,069 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2023-01-28 12:01:02,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2023-01-28 12:01:02,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:02,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2023-01-28 12:01:02,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,071 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,071 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 613 flow. Second operand 5 states and 315 transitions. [2023-01-28 12:01:02,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 891 flow [2023-01-28 12:01:02,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 815 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-01-28 12:01:02,076 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 627 flow [2023-01-28 12:01:02,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=627, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-01-28 12:01:02,076 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-01-28 12:01:02,077 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 627 flow [2023-01-28 12:01:02,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:02,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:02,084 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 12:01:02,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:02,282 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 12:01:02,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1451445671, now seen corresponding path program 1 times [2023-01-28 12:01:02,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:02,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539089437] [2023-01-28 12:01:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:02,309 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 12:01:02,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:02,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539089437] [2023-01-28 12:01:02,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539089437] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:02,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:02,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:02,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554392964] [2023-01-28 12:01:02,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:02,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:02,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:02,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:02,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:01:02,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:02,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 627 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:02,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:02,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:02,384 INFO L130 PetriNetUnfolder]: 127/226 cut-off events. [2023-01-28 12:01:02,385 INFO L131 PetriNetUnfolder]: For 1366/1366 co-relation queries the response was YES. [2023-01-28 12:01:02,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 226 events. 127/226 cut-off events. For 1366/1366 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 733 event pairs, 16 based on Foata normal form. 4/230 useless extension candidates. Maximal degree in co-relation 1104. Up to 90 conditions per place. [2023-01-28 12:01:02,387 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 49 selfloop transitions, 28 changer transitions 4/81 dead transitions. [2023-01-28 12:01:02,387 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 873 flow [2023-01-28 12:01:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 12:01:02,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 12:01:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 431 transitions. [2023-01-28 12:01:02,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41885325558794945 [2023-01-28 12:01:02,388 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 431 transitions. [2023-01-28 12:01:02,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 431 transitions. [2023-01-28 12:01:02,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:02,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 431 transitions. [2023-01-28 12:01:02,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 61.57142857142857) internal successors, (431), 7 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,391 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,391 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 627 flow. Second operand 7 states and 431 transitions. [2023-01-28 12:01:02,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 873 flow [2023-01-28 12:01:02,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 830 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-01-28 12:01:02,396 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 639 flow [2023-01-28 12:01:02,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=639, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2023-01-28 12:01:02,396 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 47 predicate places. [2023-01-28 12:01:02,396 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 639 flow [2023-01-28 12:01:02,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:02,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:02,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 12:01:02,397 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 12:01:02,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:02,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1729374333, now seen corresponding path program 2 times [2023-01-28 12:01:02,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:02,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989820045] [2023-01-28 12:01:02,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:02,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:02,423 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 12:01:02,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:02,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989820045] [2023-01-28 12:01:02,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989820045] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:02,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:02,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:02,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806844495] [2023-01-28 12:01:02,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:02,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:02,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:01:02,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:02,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 639 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:02,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:02,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:02,497 INFO L130 PetriNetUnfolder]: 133/236 cut-off events. [2023-01-28 12:01:02,497 INFO L131 PetriNetUnfolder]: For 1381/1381 co-relation queries the response was YES. [2023-01-28 12:01:02,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 236 events. 133/236 cut-off events. For 1381/1381 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 757 event pairs, 23 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 1261. Up to 133 conditions per place. [2023-01-28 12:01:02,499 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 62 selfloop transitions, 18 changer transitions 0/80 dead transitions. [2023-01-28 12:01:02,499 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 916 flow [2023-01-28 12:01:02,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:01:02,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:01:02,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 318 transitions. [2023-01-28 12:01:02,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326530612244898 [2023-01-28 12:01:02,500 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 318 transitions. [2023-01-28 12:01:02,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 318 transitions. [2023-01-28 12:01:02,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:02,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 318 transitions. [2023-01-28 12:01:02,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.6) internal successors, (318), 5 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,502 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,502 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 639 flow. Second operand 5 states and 318 transitions. [2023-01-28 12:01:02,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 916 flow [2023-01-28 12:01:02,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 837 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-01-28 12:01:02,507 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 639 flow [2023-01-28 12:01:02,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=639, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-01-28 12:01:02,508 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2023-01-28 12:01:02,508 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 639 flow [2023-01-28 12:01:02,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:02,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:02,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 12:01:02,508 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 12:01:02,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:02,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2096697363, now seen corresponding path program 3 times [2023-01-28 12:01:02,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:02,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327644948] [2023-01-28 12:01:02,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:02,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:02,533 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 12:01:02,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:02,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327644948] [2023-01-28 12:01:02,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327644948] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:02,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:02,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:02,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876242424] [2023-01-28 12:01:02,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:02,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:02,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:02,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:02,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:01:02,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:02,535 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 639 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,535 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:02,535 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:02,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:02,620 INFO L130 PetriNetUnfolder]: 128/231 cut-off events. [2023-01-28 12:01:02,620 INFO L131 PetriNetUnfolder]: For 1179/1179 co-relation queries the response was YES. [2023-01-28 12:01:02,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 231 events. 128/231 cut-off events. For 1179/1179 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 749 event pairs, 16 based on Foata normal form. 4/235 useless extension candidates. Maximal degree in co-relation 1179. Up to 92 conditions per place. [2023-01-28 12:01:02,622 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 58 selfloop transitions, 28 changer transitions 3/89 dead transitions. [2023-01-28 12:01:02,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 942 flow [2023-01-28 12:01:02,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 12:01:02,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 12:01:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 495 transitions. [2023-01-28 12:01:02,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42091836734693877 [2023-01-28 12:01:02,624 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 495 transitions. [2023-01-28 12:01:02,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 495 transitions. [2023-01-28 12:01:02,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:02,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 495 transitions. [2023-01-28 12:01:02,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 61.875) internal successors, (495), 8 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,627 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,627 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 639 flow. Second operand 8 states and 495 transitions. [2023-01-28 12:01:02,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 942 flow [2023-01-28 12:01:02,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 908 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-01-28 12:01:02,633 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 676 flow [2023-01-28 12:01:02,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=676, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2023-01-28 12:01:02,634 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 51 predicate places. [2023-01-28 12:01:02,634 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 676 flow [2023-01-28 12:01:02,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:02,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:02,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 12:01:02,635 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 12:01:02,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:02,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1833085128, now seen corresponding path program 2 times [2023-01-28 12:01:02,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:02,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902469852] [2023-01-28 12:01:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:02,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:02,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:02,659 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 12:01:02,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:02,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902469852] [2023-01-28 12:01:02,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902469852] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:02,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:02,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693744502] [2023-01-28 12:01:02,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:02,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:02,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:02,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:02,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:01:02,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:02,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,661 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:02,661 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:02,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:02,736 INFO L130 PetriNetUnfolder]: 145/268 cut-off events. [2023-01-28 12:01:02,736 INFO L131 PetriNetUnfolder]: For 1492/1492 co-relation queries the response was YES. [2023-01-28 12:01:02,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 268 events. 145/268 cut-off events. For 1492/1492 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 935 event pairs, 10 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 1445. Up to 103 conditions per place. [2023-01-28 12:01:02,738 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 56 selfloop transitions, 26 changer transitions 1/83 dead transitions. [2023-01-28 12:01:02,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 83 transitions, 989 flow [2023-01-28 12:01:02,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 12:01:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 12:01:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 371 transitions. [2023-01-28 12:01:02,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2023-01-28 12:01:02,740 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 371 transitions. [2023-01-28 12:01:02,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 371 transitions. [2023-01-28 12:01:02,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:02,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 371 transitions. [2023-01-28 12:01:02,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.833333333333336) internal successors, (371), 6 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,742 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,742 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 676 flow. Second operand 6 states and 371 transitions. [2023-01-28 12:01:02,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 83 transitions, 989 flow [2023-01-28 12:01:02,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 931 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-01-28 12:01:02,747 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 767 flow [2023-01-28 12:01:02,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=767, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-01-28 12:01:02,748 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-01-28 12:01:02,748 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 767 flow [2023-01-28 12:01:02,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:02,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:02,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 12:01:02,748 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 12:01:02,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:02,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1631307914, now seen corresponding path program 3 times [2023-01-28 12:01:02,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:02,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854148024] [2023-01-28 12:01:02,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:02,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:02,773 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 12:01:02,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:02,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854148024] [2023-01-28 12:01:02,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854148024] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:02,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182415267] [2023-01-28 12:01:02,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:01:02,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:02,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:02,775 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 12:01:02,776 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 12:01:02,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 12:01:02,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:01:02,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 12:01:02,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:02,827 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 12:01:02,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:02,850 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 12:01:02,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182415267] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:02,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 12:01:02,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-01-28 12:01:02,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205709242] [2023-01-28 12:01:02,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:02,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:02,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:02,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:02,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-28 12:01:02,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:02,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 767 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:02,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:02,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:02,947 INFO L130 PetriNetUnfolder]: 150/281 cut-off events. [2023-01-28 12:01:02,947 INFO L131 PetriNetUnfolder]: For 1865/1865 co-relation queries the response was YES. [2023-01-28 12:01:02,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609 conditions, 281 events. 150/281 cut-off events. For 1865/1865 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1012 event pairs, 6 based on Foata normal form. 6/287 useless extension candidates. Maximal degree in co-relation 1535. Up to 163 conditions per place. [2023-01-28 12:01:02,949 INFO L137 encePairwiseOnDemand]: 140/147 looper letters, 54 selfloop transitions, 29 changer transitions 0/83 dead transitions. [2023-01-28 12:01:02,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 1014 flow [2023-01-28 12:01:02,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:01:02,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:01:02,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 315 transitions. [2023-01-28 12:01:02,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-01-28 12:01:02,951 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 315 transitions. [2023-01-28 12:01:02,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 315 transitions. [2023-01-28 12:01:02,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:02,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 315 transitions. [2023-01-28 12:01:02,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 63.0) internal successors, (315), 5 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,953 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,953 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 767 flow. Second operand 5 states and 315 transitions. [2023-01-28 12:01:02,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 1014 flow [2023-01-28 12:01:02,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 945 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-01-28 12:01:02,958 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 819 flow [2023-01-28 12:01:02,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=819, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-01-28 12:01:02,959 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 56 predicate places. [2023-01-28 12:01:02,959 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 819 flow [2023-01-28 12:01:02,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:02,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:02,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:02,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 12:01:03,163 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,SelfDestructingSolverStorable11 [2023-01-28 12:01:03,164 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 12:01:03,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:03,164 INFO L85 PathProgramCache]: Analyzing trace with hash 199479147, now seen corresponding path program 4 times [2023-01-28 12:01:03,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:03,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443797633] [2023-01-28 12:01:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:03,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:03,191 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 12:01:03,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:03,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443797633] [2023-01-28 12:01:03,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443797633] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:03,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041366550] [2023-01-28 12:01:03,192 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:01:03,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:03,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:03,193 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 12:01:03,195 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 12:01:03,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:01:03,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:01:03,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 12:01:03,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:03,253 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 12:01:03,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:03,274 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 12:01:03,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041366550] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:03,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 12:01:03,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2023-01-28 12:01:03,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525410079] [2023-01-28 12:01:03,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:03,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:03,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:03,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:03,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-28 12:01:03,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:03,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 819 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:03,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:03,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:03,351 INFO L130 PetriNetUnfolder]: 159/310 cut-off events. [2023-01-28 12:01:03,351 INFO L131 PetriNetUnfolder]: For 2376/2376 co-relation queries the response was YES. [2023-01-28 12:01:03,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 310 events. 159/310 cut-off events. For 2376/2376 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1194 event pairs, 10 based on Foata normal form. 6/316 useless extension candidates. Maximal degree in co-relation 1720. Up to 160 conditions per place. [2023-01-28 12:01:03,353 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 63 selfloop transitions, 22 changer transitions 0/85 dead transitions. [2023-01-28 12:01:03,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 85 transitions, 1111 flow [2023-01-28 12:01:03,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:01:03,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:01:03,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 311 transitions. [2023-01-28 12:01:03,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4231292517006803 [2023-01-28 12:01:03,355 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 311 transitions. [2023-01-28 12:01:03,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 311 transitions. [2023-01-28 12:01:03,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:03,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 311 transitions. [2023-01-28 12:01:03,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 62.2) internal successors, (311), 5 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,357 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,357 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 819 flow. Second operand 5 states and 311 transitions. [2023-01-28 12:01:03,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 85 transitions, 1111 flow [2023-01-28 12:01:03,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 1098 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 12:01:03,364 INFO L231 Difference]: Finished difference. Result has 81 places, 69 transitions, 906 flow [2023-01-28 12:01:03,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=906, PETRI_PLACES=81, PETRI_TRANSITIONS=69} [2023-01-28 12:01:03,364 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 61 predicate places. [2023-01-28 12:01:03,364 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 69 transitions, 906 flow [2023-01-28 12:01:03,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:03,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:03,372 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 12:01:03,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:03,570 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 12:01:03,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1851774549, now seen corresponding path program 5 times [2023-01-28 12:01:03,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:03,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234469165] [2023-01-28 12:01:03,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:03,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:03,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:03,596 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 12:01:03,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:03,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234469165] [2023-01-28 12:01:03,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234469165] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:03,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:03,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:03,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062343151] [2023-01-28 12:01:03,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:03,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:03,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:03,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:03,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:01:03,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:03,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 69 transitions, 906 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:03,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:03,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:03,678 INFO L130 PetriNetUnfolder]: 145/286 cut-off events. [2023-01-28 12:01:03,678 INFO L131 PetriNetUnfolder]: For 2486/2486 co-relation queries the response was YES. [2023-01-28 12:01:03,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1783 conditions, 286 events. 145/286 cut-off events. For 2486/2486 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1079 event pairs, 10 based on Foata normal form. 8/294 useless extension candidates. Maximal degree in co-relation 1686. Up to 115 conditions per place. [2023-01-28 12:01:03,680 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 60 selfloop transitions, 25 changer transitions 1/86 dead transitions. [2023-01-28 12:01:03,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 1172 flow [2023-01-28 12:01:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 12:01:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 12:01:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 371 transitions. [2023-01-28 12:01:03,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2023-01-28 12:01:03,682 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 371 transitions. [2023-01-28 12:01:03,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 371 transitions. [2023-01-28 12:01:03,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:03,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 371 transitions. [2023-01-28 12:01:03,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 61.833333333333336) internal successors, (371), 6 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,684 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,684 INFO L175 Difference]: Start difference. First operand has 81 places, 69 transitions, 906 flow. Second operand 6 states and 371 transitions. [2023-01-28 12:01:03,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 1172 flow [2023-01-28 12:01:03,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 1128 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-01-28 12:01:03,691 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 915 flow [2023-01-28 12:01:03,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2023-01-28 12:01:03,692 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-01-28 12:01:03,692 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 915 flow [2023-01-28 12:01:03,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:03,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:03,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-01-28 12:01:03,692 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 12:01:03,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:03,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1933318608, now seen corresponding path program 4 times [2023-01-28 12:01:03,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:03,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531371522] [2023-01-28 12:01:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:03,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:03,718 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 12:01:03,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:03,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531371522] [2023-01-28 12:01:03,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531371522] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:03,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543912244] [2023-01-28 12:01:03,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:01:03,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:03,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:03,733 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 12:01:03,735 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 12:01:03,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:01:03,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:01:03,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 12:01:03,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:03,794 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 12:01:03,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:03,819 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 12:01:03,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543912244] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:03,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 12:01:03,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-01-28 12:01:03,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519607576] [2023-01-28 12:01:03,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:03,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:03,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:03,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:03,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-28 12:01:03,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:03,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 915 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:03,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:03,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:03,897 INFO L130 PetriNetUnfolder]: 139/272 cut-off events. [2023-01-28 12:01:03,897 INFO L131 PetriNetUnfolder]: For 2565/2565 co-relation queries the response was YES. [2023-01-28 12:01:03,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 272 events. 139/272 cut-off events. For 2565/2565 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 998 event pairs, 23 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 1618. Up to 145 conditions per place. [2023-01-28 12:01:03,899 INFO L137 encePairwiseOnDemand]: 140/147 looper letters, 58 selfloop transitions, 31 changer transitions 0/89 dead transitions. [2023-01-28 12:01:03,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 1175 flow [2023-01-28 12:01:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 12:01:03,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 12:01:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 378 transitions. [2023-01-28 12:01:03,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-01-28 12:01:03,901 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 378 transitions. [2023-01-28 12:01:03,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 378 transitions. [2023-01-28 12:01:03,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:03,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 378 transitions. [2023-01-28 12:01:03,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 63.0) internal successors, (378), 6 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,903 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,903 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 915 flow. Second operand 6 states and 378 transitions. [2023-01-28 12:01:03,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 1175 flow [2023-01-28 12:01:03,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 1152 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-28 12:01:03,909 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 967 flow [2023-01-28 12:01:03,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=967, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2023-01-28 12:01:03,909 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 66 predicate places. [2023-01-28 12:01:03,909 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 967 flow [2023-01-28 12:01:03,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:03,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:03,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:03,928 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 12:01:04,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 12:01:04,114 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 12:01:04,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:04,115 INFO L85 PathProgramCache]: Analyzing trace with hash 58117330, now seen corresponding path program 5 times [2023-01-28 12:01:04,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:04,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151171978] [2023-01-28 12:01:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:04,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:04,138 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 12:01:04,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:04,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151171978] [2023-01-28 12:01:04,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151171978] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:04,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:04,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:04,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707517217] [2023-01-28 12:01:04,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:04,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:04,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:04,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:04,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:01:04,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:04,140 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 967 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,140 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:04,140 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:04,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:04,217 INFO L130 PetriNetUnfolder]: 137/270 cut-off events. [2023-01-28 12:01:04,217 INFO L131 PetriNetUnfolder]: For 2647/2647 co-relation queries the response was YES. [2023-01-28 12:01:04,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 270 events. 137/270 cut-off events. For 2647/2647 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 994 event pairs, 27 based on Foata normal form. 2/272 useless extension candidates. Maximal degree in co-relation 1721. Up to 101 conditions per place. [2023-01-28 12:01:04,219 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 54 selfloop transitions, 27 changer transitions 2/83 dead transitions. [2023-01-28 12:01:04,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 1184 flow [2023-01-28 12:01:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 12:01:04,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 12:01:04,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 426 transitions. [2023-01-28 12:01:04,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4139941690962099 [2023-01-28 12:01:04,221 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 426 transitions. [2023-01-28 12:01:04,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 426 transitions. [2023-01-28 12:01:04,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:04,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 426 transitions. [2023-01-28 12:01:04,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.857142857142854) internal successors, (426), 7 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,223 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,223 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 967 flow. Second operand 7 states and 426 transitions. [2023-01-28 12:01:04,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 1184 flow [2023-01-28 12:01:04,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 83 transitions, 1138 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-01-28 12:01:04,230 INFO L231 Difference]: Finished difference. Result has 90 places, 66 transitions, 932 flow [2023-01-28 12:01:04,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=932, PETRI_PLACES=90, PETRI_TRANSITIONS=66} [2023-01-28 12:01:04,231 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2023-01-28 12:01:04,231 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 66 transitions, 932 flow [2023-01-28 12:01:04,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:04,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:04,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-01-28 12:01:04,231 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 12:01:04,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:04,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1486589744, now seen corresponding path program 6 times [2023-01-28 12:01:04,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:04,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835422445] [2023-01-28 12:01:04,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:04,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:04,256 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 12:01:04,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:04,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835422445] [2023-01-28 12:01:04,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835422445] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:04,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:04,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703986744] [2023-01-28 12:01:04,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:04,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:04,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:04,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:01:04,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:04,258 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 66 transitions, 932 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,258 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:04,258 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:04,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:04,347 INFO L130 PetriNetUnfolder]: 131/252 cut-off events. [2023-01-28 12:01:04,347 INFO L131 PetriNetUnfolder]: For 2667/2667 co-relation queries the response was YES. [2023-01-28 12:01:04,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1703 conditions, 252 events. 131/252 cut-off events. For 2667/2667 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 891 event pairs, 23 based on Foata normal form. 2/254 useless extension candidates. Maximal degree in co-relation 1659. Up to 101 conditions per place. [2023-01-28 12:01:04,349 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 55 selfloop transitions, 27 changer transitions 1/83 dead transitions. [2023-01-28 12:01:04,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 83 transitions, 1156 flow [2023-01-28 12:01:04,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 12:01:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 12:01:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 487 transitions. [2023-01-28 12:01:04,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4141156462585034 [2023-01-28 12:01:04,351 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 487 transitions. [2023-01-28 12:01:04,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 487 transitions. [2023-01-28 12:01:04,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:04,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 487 transitions. [2023-01-28 12:01:04,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 60.875) internal successors, (487), 8 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,353 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,353 INFO L175 Difference]: Start difference. First operand has 90 places, 66 transitions, 932 flow. Second operand 8 states and 487 transitions. [2023-01-28 12:01:04,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 83 transitions, 1156 flow [2023-01-28 12:01:04,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 83 transitions, 1106 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-28 12:01:04,359 INFO L231 Difference]: Finished difference. Result has 92 places, 63 transitions, 888 flow [2023-01-28 12:01:04,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=888, PETRI_PLACES=92, PETRI_TRANSITIONS=63} [2023-01-28 12:01:04,360 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-01-28 12:01:04,360 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 63 transitions, 888 flow [2023-01-28 12:01:04,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:04,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:04,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-01-28 12:01:04,361 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 12:01:04,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:04,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1093501371, now seen corresponding path program 6 times [2023-01-28 12:01:04,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:04,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861276669] [2023-01-28 12:01:04,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:04,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:04,385 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 12:01:04,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:04,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861276669] [2023-01-28 12:01:04,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861276669] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:04,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 12:01:04,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 12:01:04,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519643264] [2023-01-28 12:01:04,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:04,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 12:01:04,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 12:01:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 12:01:04,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 147 [2023-01-28 12:01:04,387 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 63 transitions, 888 flow. Second operand has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,387 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:04,387 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 147 [2023-01-28 12:01:04,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:04,449 INFO L130 PetriNetUnfolder]: 125/236 cut-off events. [2023-01-28 12:01:04,450 INFO L131 PetriNetUnfolder]: For 2604/2604 co-relation queries the response was YES. [2023-01-28 12:01:04,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 236 events. 125/236 cut-off events. For 2604/2604 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 783 event pairs, 10 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 1461. Up to 173 conditions per place. [2023-01-28 12:01:04,452 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 50 selfloop transitions, 18 changer transitions 0/68 dead transitions. [2023-01-28 12:01:04,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 68 transitions, 1010 flow [2023-01-28 12:01:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 12:01:04,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 12:01:04,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 305 transitions. [2023-01-28 12:01:04,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2023-01-28 12:01:04,453 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 305 transitions. [2023-01-28 12:01:04,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 305 transitions. [2023-01-28 12:01:04,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:04,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 305 transitions. [2023-01-28 12:01:04,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 61.0) internal successors, (305), 5 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,454 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,454 INFO L175 Difference]: Start difference. First operand has 92 places, 63 transitions, 888 flow. Second operand 5 states and 305 transitions. [2023-01-28 12:01:04,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 68 transitions, 1010 flow [2023-01-28 12:01:04,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 68 transitions, 950 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-01-28 12:01:04,459 INFO L231 Difference]: Finished difference. Result has 85 places, 61 transitions, 815 flow [2023-01-28 12:01:04,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=815, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2023-01-28 12:01:04,460 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-01-28 12:01:04,460 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 815 flow [2023-01-28 12:01:04,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.8) internal successors, (289), 5 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:04,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:04,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-01-28 12:01:04,460 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 12:01:04,461 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:04,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1299106536, now seen corresponding path program 1 times [2023-01-28 12:01:04,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:04,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123114469] [2023-01-28 12:01:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:04,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:04,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:04,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:04,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:04,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123114469] [2023-01-28 12:01:04,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123114469] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:04,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558836724] [2023-01-28 12:01:04,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:04,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:04,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:04,546 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 12:01:04,548 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 12:01:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:04,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 12:01:04,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:04,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:04,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558836724] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:01:04,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:01:04,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 12:01:04,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522254017] [2023-01-28 12:01:04,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:01:04,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 12:01:04,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 12:01:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-01-28 12:01:04,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-01-28 12:01:04,920 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 815 flow. Second operand has 18 states, 18 states have (on average 54.94444444444444) internal successors, (989), 18 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:04,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:04,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-01-28 12:01:04,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:05,210 INFO L130 PetriNetUnfolder]: 125/235 cut-off events. [2023-01-28 12:01:05,211 INFO L131 PetriNetUnfolder]: For 2124/2124 co-relation queries the response was YES. [2023-01-28 12:01:05,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1574 conditions, 235 events. 125/235 cut-off events. For 2124/2124 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 793 event pairs, 2 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 1359. Up to 51 conditions per place. [2023-01-28 12:01:05,212 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 42 selfloop transitions, 22 changer transitions 27/91 dead transitions. [2023-01-28 12:01:05,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 1145 flow [2023-01-28 12:01:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 12:01:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 12:01:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 642 transitions. [2023-01-28 12:01:05,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3970315398886827 [2023-01-28 12:01:05,214 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 642 transitions. [2023-01-28 12:01:05,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 642 transitions. [2023-01-28 12:01:05,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:05,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 642 transitions. [2023-01-28 12:01:05,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.36363636363637) internal successors, (642), 11 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:05,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:05,217 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:05,217 INFO L175 Difference]: Start difference. First operand has 85 places, 61 transitions, 815 flow. Second operand 11 states and 642 transitions. [2023-01-28 12:01:05,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 1145 flow [2023-01-28 12:01:05,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 1120 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 12:01:05,222 INFO L231 Difference]: Finished difference. Result has 94 places, 48 transitions, 666 flow [2023-01-28 12:01:05,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=666, PETRI_PLACES=94, PETRI_TRANSITIONS=48} [2023-01-28 12:01:05,223 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 74 predicate places. [2023-01-28 12:01:05,223 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 48 transitions, 666 flow [2023-01-28 12:01:05,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.94444444444444) internal successors, (989), 18 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:05,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:05,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:05,241 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 12:01:05,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:05,446 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 12:01:05,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:05,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1701107400, now seen corresponding path program 2 times [2023-01-28 12:01:05,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:05,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953541540] [2023-01-28 12:01:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:05,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:05,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:05,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953541540] [2023-01-28 12:01:05,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953541540] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:05,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334823718] [2023-01-28 12:01:05,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:01:05,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:05,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:05,637 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 12:01:05,697 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 12:01:05,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:01:05,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:01:05,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 12:01:05,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:05,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:06,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:06,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334823718] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:01:06,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:01:06,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-01-28 12:01:06,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986890008] [2023-01-28 12:01:06,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:01:06,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 12:01:06,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:06,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 12:01:06,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-01-28 12:01:06,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 147 [2023-01-28 12:01:06,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 48 transitions, 666 flow. Second operand has 20 states, 20 states have (on average 49.8) internal successors, (996), 20 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:06,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:06,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 147 [2023-01-28 12:01:06,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:06,330 INFO L130 PetriNetUnfolder]: 96/188 cut-off events. [2023-01-28 12:01:06,330 INFO L131 PetriNetUnfolder]: For 1913/1913 co-relation queries the response was YES. [2023-01-28 12:01:06,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1293 conditions, 188 events. 96/188 cut-off events. For 1913/1913 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 580 event pairs, 2 based on Foata normal form. 1/189 useless extension candidates. Maximal degree in co-relation 1258. Up to 46 conditions per place. [2023-01-28 12:01:06,332 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 46 selfloop transitions, 27 changer transitions 9/82 dead transitions. [2023-01-28 12:01:06,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 82 transitions, 1049 flow [2023-01-28 12:01:06,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 12:01:06,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 12:01:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 586 transitions. [2023-01-28 12:01:06,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3623995052566481 [2023-01-28 12:01:06,333 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 586 transitions. [2023-01-28 12:01:06,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 586 transitions. [2023-01-28 12:01:06,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:06,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 586 transitions. [2023-01-28 12:01:06,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 53.27272727272727) internal successors, (586), 11 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:06,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:06,336 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:06,336 INFO L175 Difference]: Start difference. First operand has 94 places, 48 transitions, 666 flow. Second operand 11 states and 586 transitions. [2023-01-28 12:01:06,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 82 transitions, 1049 flow [2023-01-28 12:01:06,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 837 flow, removed 15 selfloop flow, removed 20 redundant places. [2023-01-28 12:01:06,341 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 593 flow [2023-01-28 12:01:06,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=593, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2023-01-28 12:01:06,341 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2023-01-28 12:01:06,341 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 593 flow [2023-01-28 12:01:06,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 49.8) internal successors, (996), 20 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:06,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:06,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:06,357 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 12:01:06,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:06,547 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 12:01:06,548 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:06,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1717886460, now seen corresponding path program 3 times [2023-01-28 12:01:06,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:06,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031973963] [2023-01-28 12:01:06,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:06,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:06,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031973963] [2023-01-28 12:01:06,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031973963] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:06,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610295698] [2023-01-28 12:01:06,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 12:01:06,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:06,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:06,654 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 12:01:06,655 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 12:01:06,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 12:01:06,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:01:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 12:01:06,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:06,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:07,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610295698] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:01:07,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:01:07,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 12:01:07,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247492452] [2023-01-28 12:01:07,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:01:07,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 12:01:07,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:07,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 12:01:07,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-01-28 12:01:07,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-01-28 12:01:07,013 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 593 flow. Second operand has 19 states, 19 states have (on average 54.421052631578945) internal successors, (1034), 19 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:07,013 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:07,013 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-01-28 12:01:07,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:07,240 INFO L130 PetriNetUnfolder]: 90/183 cut-off events. [2023-01-28 12:01:07,240 INFO L131 PetriNetUnfolder]: For 1103/1103 co-relation queries the response was YES. [2023-01-28 12:01:07,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1111 conditions, 183 events. 90/183 cut-off events. For 1103/1103 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 572 event pairs, 2 based on Foata normal form. 2/185 useless extension candidates. Maximal degree in co-relation 1079. Up to 45 conditions per place. [2023-01-28 12:01:07,242 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 34 selfloop transitions, 16 changer transitions 26/76 dead transitions. [2023-01-28 12:01:07,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 76 transitions, 870 flow [2023-01-28 12:01:07,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 12:01:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 12:01:07,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 635 transitions. [2023-01-28 12:01:07,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39270253555967843 [2023-01-28 12:01:07,243 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 635 transitions. [2023-01-28 12:01:07,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 635 transitions. [2023-01-28 12:01:07,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:07,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 635 transitions. [2023-01-28 12:01:07,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 57.72727272727273) internal successors, (635), 11 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:07,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:07,246 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:07,246 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 593 flow. Second operand 11 states and 635 transitions. [2023-01-28 12:01:07,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 76 transitions, 870 flow [2023-01-28 12:01:07,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 793 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-01-28 12:01:07,250 INFO L231 Difference]: Finished difference. Result has 80 places, 39 transitions, 422 flow [2023-01-28 12:01:07,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=422, PETRI_PLACES=80, PETRI_TRANSITIONS=39} [2023-01-28 12:01:07,250 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-01-28 12:01:07,250 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 39 transitions, 422 flow [2023-01-28 12:01:07,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.421052631578945) internal successors, (1034), 19 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:07,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:07,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:07,255 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 12:01:07,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:07,455 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 12:01:07,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:07,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1577916472, now seen corresponding path program 4 times [2023-01-28 12:01:07,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:07,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756144752] [2023-01-28 12:01:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:07,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:07,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:07,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:07,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756144752] [2023-01-28 12:01:07,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756144752] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:07,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890036679] [2023-01-28 12:01:07,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 12:01:07,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:07,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:07,549 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 12:01:07,573 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 12:01:07,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 12:01:07,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:01:07,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 12:01:07,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:07,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:07,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:07,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890036679] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:01:07,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:01:07,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 12:01:07,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475859399] [2023-01-28 12:01:07,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:01:07,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 12:01:07,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:07,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 12:01:07,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-01-28 12:01:07,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-01-28 12:01:07,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 39 transitions, 422 flow. Second operand has 19 states, 19 states have (on average 54.421052631578945) internal successors, (1034), 19 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:07,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:07,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-01-28 12:01:07,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:08,432 INFO L130 PetriNetUnfolder]: 81/179 cut-off events. [2023-01-28 12:01:08,432 INFO L131 PetriNetUnfolder]: For 977/977 co-relation queries the response was YES. [2023-01-28 12:01:08,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 179 events. 81/179 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 589 event pairs, 1 based on Foata normal form. 3/182 useless extension candidates. Maximal degree in co-relation 998. Up to 41 conditions per place. [2023-01-28 12:01:08,434 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 38 selfloop transitions, 28 changer transitions 18/84 dead transitions. [2023-01-28 12:01:08,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 899 flow [2023-01-28 12:01:08,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 12:01:08,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 12:01:08,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 974 transitions. [2023-01-28 12:01:08,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897559023609444 [2023-01-28 12:01:08,435 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 974 transitions. [2023-01-28 12:01:08,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 974 transitions. [2023-01-28 12:01:08,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:08,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 974 transitions. [2023-01-28 12:01:08,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 57.294117647058826) internal successors, (974), 17 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:08,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:08,440 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:08,440 INFO L175 Difference]: Start difference. First operand has 80 places, 39 transitions, 422 flow. Second operand 17 states and 974 transitions. [2023-01-28 12:01:08,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 899 flow [2023-01-28 12:01:08,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 795 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-01-28 12:01:08,444 INFO L231 Difference]: Finished difference. Result has 82 places, 48 transitions, 535 flow [2023-01-28 12:01:08,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=535, PETRI_PLACES=82, PETRI_TRANSITIONS=48} [2023-01-28 12:01:08,444 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 62 predicate places. [2023-01-28 12:01:08,444 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 48 transitions, 535 flow [2023-01-28 12:01:08,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.421052631578945) internal successors, (1034), 19 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:08,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:08,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:08,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-28 12:01:08,665 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,SelfDestructingSolverStorable21 [2023-01-28 12:01:08,665 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 12:01:08,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:08,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1858770940, now seen corresponding path program 5 times [2023-01-28 12:01:08,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:08,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280801403] [2023-01-28 12:01:08,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:08,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:08,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:08,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:08,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280801403] [2023-01-28 12:01:08,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280801403] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:08,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748074614] [2023-01-28 12:01:08,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 12:01:08,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:08,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:08,825 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 12:01:08,870 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 12:01:08,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:01:08,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:01:08,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 12:01:08,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:08,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 12:01:08,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748074614] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 12:01:08,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 12:01:08,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-01-28 12:01:08,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285620557] [2023-01-28 12:01:08,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 12:01:08,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 12:01:08,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:08,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 12:01:08,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-01-28 12:01:08,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 147 [2023-01-28 12:01:08,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 48 transitions, 535 flow. Second operand has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:08,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:08,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 147 [2023-01-28 12:01:08,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:09,063 INFO L130 PetriNetUnfolder]: 72/142 cut-off events. [2023-01-28 12:01:09,064 INFO L131 PetriNetUnfolder]: For 834/834 co-relation queries the response was YES. [2023-01-28 12:01:09,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 142 events. 72/142 cut-off events. For 834/834 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 391 event pairs, 8 based on Foata normal form. 1/143 useless extension candidates. Maximal degree in co-relation 834. Up to 45 conditions per place. [2023-01-28 12:01:09,066 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 28 selfloop transitions, 9 changer transitions 21/58 dead transitions. [2023-01-28 12:01:09,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 58 transitions, 698 flow [2023-01-28 12:01:09,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 12:01:09,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 12:01:09,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 424 transitions. [2023-01-28 12:01:09,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41205053449951407 [2023-01-28 12:01:09,067 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 424 transitions. [2023-01-28 12:01:09,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 424 transitions. [2023-01-28 12:01:09,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:09,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 424 transitions. [2023-01-28 12:01:09,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 60.57142857142857) internal successors, (424), 7 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 12:01:09,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:09,069 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:09,069 INFO L175 Difference]: Start difference. First operand has 82 places, 48 transitions, 535 flow. Second operand 7 states and 424 transitions. [2023-01-28 12:01:09,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 58 transitions, 698 flow [2023-01-28 12:01:09,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 589 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-01-28 12:01:09,072 INFO L231 Difference]: Finished difference. Result has 75 places, 34 transitions, 313 flow [2023-01-28 12:01:09,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=313, PETRI_PLACES=75, PETRI_TRANSITIONS=34} [2023-01-28 12:01:09,072 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-01-28 12:01:09,072 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 34 transitions, 313 flow [2023-01-28 12:01:09,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.142857142857146) internal successors, (407), 7 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:09,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:09,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:09,093 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 12:01:09,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:09,294 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 12:01:09,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2082091444, now seen corresponding path program 6 times [2023-01-28 12:01:09,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:09,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622854281] [2023-01-28 12:01:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:09,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:09,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:09,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622854281] [2023-01-28 12:01:09,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622854281] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:09,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979678831] [2023-01-28 12:01:09,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 12:01:09,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:09,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:09,397 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 12:01:09,399 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 12:01:09,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 12:01:09,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:01:09,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 12:01:09,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:09,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:09,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:09,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979678831] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:01:09,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:01:09,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 12:01:09,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835793108] [2023-01-28 12:01:09,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:01:09,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 12:01:09,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:09,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 12:01:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-01-28 12:01:09,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-01-28 12:01:09,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 34 transitions, 313 flow. Second operand has 19 states, 19 states have (on average 54.73684210526316) internal successors, (1040), 19 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 12:01:09,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:09,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-01-28 12:01:09,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:10,345 INFO L130 PetriNetUnfolder]: 54/123 cut-off events. [2023-01-28 12:01:10,345 INFO L131 PetriNetUnfolder]: For 494/494 co-relation queries the response was YES. [2023-01-28 12:01:10,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 123 events. 54/123 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 346 event pairs, 1 based on Foata normal form. 2/125 useless extension candidates. Maximal degree in co-relation 621. Up to 23 conditions per place. [2023-01-28 12:01:10,346 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 24 selfloop transitions, 17 changer transitions 28/69 dead transitions. [2023-01-28 12:01:10,346 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 69 transitions, 589 flow [2023-01-28 12:01:10,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 12:01:10,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 12:01:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 967 transitions. [2023-01-28 12:01:10,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869547819127651 [2023-01-28 12:01:10,348 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 967 transitions. [2023-01-28 12:01:10,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 967 transitions. [2023-01-28 12:01:10,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:10,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 967 transitions. [2023-01-28 12:01:10,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 56.88235294117647) internal successors, (967), 17 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:10,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:10,351 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:10,351 INFO L175 Difference]: Start difference. First operand has 75 places, 34 transitions, 313 flow. Second operand 17 states and 967 transitions. [2023-01-28 12:01:10,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 69 transitions, 589 flow [2023-01-28 12:01:10,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 514 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-01-28 12:01:10,354 INFO L231 Difference]: Finished difference. Result has 74 places, 30 transitions, 249 flow [2023-01-28 12:01:10,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=249, PETRI_PLACES=74, PETRI_TRANSITIONS=30} [2023-01-28 12:01:10,354 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-01-28 12:01:10,354 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 30 transitions, 249 flow [2023-01-28 12:01:10,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.73684210526316) internal successors, (1040), 19 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 12:01:10,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:10,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:10,362 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 12:01:10,559 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,SelfDestructingSolverStorable23 [2023-01-28 12:01:10,559 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 12:01:10,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:10,560 INFO L85 PathProgramCache]: Analyzing trace with hash -669051972, now seen corresponding path program 7 times [2023-01-28 12:01:10,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:10,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063112009] [2023-01-28 12:01:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:10,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:10,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:10,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063112009] [2023-01-28 12:01:10,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063112009] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:10,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775438000] [2023-01-28 12:01:10,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 12:01:10,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:10,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:10,662 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 12:01:10,663 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 12:01:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:10,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 12:01:10,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:10,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:10,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775438000] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:01:10,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:01:10,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 12:01:10,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615216331] [2023-01-28 12:01:10,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:01:10,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 12:01:10,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 12:01:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-01-28 12:01:10,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 147 [2023-01-28 12:01:10,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 30 transitions, 249 flow. Second operand has 18 states, 18 states have (on average 54.44444444444444) internal successors, (980), 18 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:10,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:10,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 147 [2023-01-28 12:01:10,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:11,105 INFO L130 PetriNetUnfolder]: 36/84 cut-off events. [2023-01-28 12:01:11,105 INFO L131 PetriNetUnfolder]: For 304/304 co-relation queries the response was YES. [2023-01-28 12:01:11,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 84 events. 36/84 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 3 based on Foata normal form. 1/85 useless extension candidates. Maximal degree in co-relation 403. Up to 21 conditions per place. [2023-01-28 12:01:11,106 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 24 selfloop transitions, 13 changer transitions 7/44 dead transitions. [2023-01-28 12:01:11,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 44 transitions, 378 flow [2023-01-28 12:01:11,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 12:01:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 12:01:11,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 620 transitions. [2023-01-28 12:01:11,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.383426097711812 [2023-01-28 12:01:11,107 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 620 transitions. [2023-01-28 12:01:11,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 620 transitions. [2023-01-28 12:01:11,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:11,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 620 transitions. [2023-01-28 12:01:11,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 56.36363636363637) internal successors, (620), 11 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:11,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:11,109 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:11,110 INFO L175 Difference]: Start difference. First operand has 74 places, 30 transitions, 249 flow. Second operand 11 states and 620 transitions. [2023-01-28 12:01:11,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 44 transitions, 378 flow [2023-01-28 12:01:11,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 44 transitions, 336 flow, removed 5 selfloop flow, removed 13 redundant places. [2023-01-28 12:01:11,111 INFO L231 Difference]: Finished difference. Result has 63 places, 28 transitions, 215 flow [2023-01-28 12:01:11,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=215, PETRI_PLACES=63, PETRI_TRANSITIONS=28} [2023-01-28 12:01:11,112 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-01-28 12:01:11,112 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 28 transitions, 215 flow [2023-01-28 12:01:11,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.44444444444444) internal successors, (980), 18 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:11,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 12:01:11,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 12:01:11,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 12:01:11,318 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,SelfDestructingSolverStorable24 [2023-01-28 12:01:11,319 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 12:01:11,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 12:01:11,319 INFO L85 PathProgramCache]: Analyzing trace with hash -685831032, now seen corresponding path program 8 times [2023-01-28 12:01:11,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 12:01:11,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473090984] [2023-01-28 12:01:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 12:01:11,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 12:01:11,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 12:01:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:11,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 12:01:11,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473090984] [2023-01-28 12:01:11,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473090984] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 12:01:11,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959565890] [2023-01-28 12:01:11,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 12:01:11,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 12:01:11,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 12:01:11,537 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 12:01:11,597 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 12:01:11,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 12:01:11,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 12:01:11,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 12:01:11,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 12:01:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:11,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 12:01:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 12:01:11,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959565890] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 12:01:11,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 12:01:11,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-01-28 12:01:11,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165373004] [2023-01-28 12:01:11,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 12:01:11,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 12:01:11,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 12:01:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 12:01:11,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-01-28 12:01:11,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 147 [2023-01-28 12:01:11,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 28 transitions, 215 flow. Second operand has 20 states, 20 states have (on average 49.8) internal successors, (996), 20 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:11,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 12:01:11,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 147 [2023-01-28 12:01:11,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 12:01:12,079 INFO L130 PetriNetUnfolder]: 34/74 cut-off events. [2023-01-28 12:01:12,079 INFO L131 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2023-01-28 12:01:12,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 74 events. 34/74 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 3 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 345. Up to 21 conditions per place. [2023-01-28 12:01:12,080 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 0 selfloop transitions, 0 changer transitions 36/36 dead transitions. [2023-01-28 12:01:12,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 36 transitions, 312 flow [2023-01-28 12:01:12,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 12:01:12,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 12:01:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 461 transitions. [2023-01-28 12:01:12,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34845049130763417 [2023-01-28 12:01:12,081 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 461 transitions. [2023-01-28 12:01:12,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 461 transitions. [2023-01-28 12:01:12,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 12:01:12,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 461 transitions. [2023-01-28 12:01:12,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 51.22222222222222) internal successors, (461), 9 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:12,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 147.0) internal successors, (1470), 10 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:12,083 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 147.0) internal successors, (1470), 10 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:12,083 INFO L175 Difference]: Start difference. First operand has 63 places, 28 transitions, 215 flow. Second operand 9 states and 461 transitions. [2023-01-28 12:01:12,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 36 transitions, 312 flow [2023-01-28 12:01:12,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 36 transitions, 285 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-01-28 12:01:12,085 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-01-28 12:01:12,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-01-28 12:01:12,085 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-01-28 12:01:12,085 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-01-28 12:01:12,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 49.8) internal successors, (996), 20 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 12:01:12,087 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 12:01:12,088 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 12:01:12,088 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 12:01:12,101 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 12:01:12,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 12:01:12,293 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 6] [2023-01-28 12:01:12,296 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 12:01:12,296 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 12:01:12,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 12:01:12 BasicIcfg [2023-01-28 12:01:12,299 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 12:01:12,299 INFO L158 Benchmark]: Toolchain (without parser) took 14529.40ms. Allocated memory was 574.6MB in the beginning and 692.1MB in the end (delta: 117.4MB). Free memory was 534.7MB in the beginning and 315.5MB in the end (delta: 219.2MB). Peak memory consumption was 337.0MB. Max. memory is 16.0GB. [2023-01-28 12:01:12,299 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 331.4MB. Free memory is still 279.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 12:01:12,299 INFO L158 Benchmark]: CACSL2BoogieTranslator took 349.32ms. Allocated memory is still 574.6MB. Free memory was 534.3MB in the beginning and 523.8MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 12:01:12,300 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.80ms. Allocated memory is still 574.6MB. Free memory was 523.8MB in the beginning and 522.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 12:01:12,300 INFO L158 Benchmark]: Boogie Preprocessor took 46.48ms. Allocated memory is still 574.6MB. Free memory was 522.1MB in the beginning and 521.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 12:01:12,300 INFO L158 Benchmark]: RCFGBuilder took 266.43ms. Allocated memory is still 574.6MB. Free memory was 520.7MB in the beginning and 508.5MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 12:01:12,301 INFO L158 Benchmark]: TraceAbstraction took 13805.99ms. Allocated memory was 574.6MB in the beginning and 692.1MB in the end (delta: 117.4MB). Free memory was 507.8MB in the beginning and 315.5MB in the end (delta: 192.4MB). Peak memory consumption was 311.9MB. Max. memory is 16.0GB. [2023-01-28 12:01:12,301 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 331.4MB. Free memory is still 279.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 349.32ms. Allocated memory is still 574.6MB. Free memory was 534.3MB in the beginning and 523.8MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 40.80ms. Allocated memory is still 574.6MB. Free memory was 523.8MB in the beginning and 522.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 46.48ms. Allocated memory is still 574.6MB. Free memory was 522.1MB in the beginning and 521.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 266.43ms. Allocated memory is still 574.6MB. Free memory was 520.7MB in the beginning and 508.5MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 13805.99ms. Allocated memory was 574.6MB in the beginning and 692.1MB in the end (delta: 117.4MB). Free memory was 507.8MB in the beginning and 315.5MB in the end (delta: 192.4MB). Peak memory consumption was 311.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 72 PlacesBefore, 20 PlacesAfterwards, 71 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 34 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 66 TotalNumberOfCompositions, 581 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 552, independent: 540, independent conditional: 0, independent unconditional: 540, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 305, independent: 303, independent conditional: 0, independent unconditional: 303, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 552, independent: 237, independent conditional: 0, independent unconditional: 237, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 305, unknown conditional: 0, unknown unconditional: 305] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, 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 - PositiveResult [Line: 79]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 98 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: 13.7s, OverallIterations: 26, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 4.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 764 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 764 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 139 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4423 IncrementalHoareTripleChecker+Invalid, 4562 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 139 mSolverCounterUnsat, 0 mSDtfsCounter, 4423 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 581 GetRequests, 253 SyntacticMatches, 34 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=967occurred in iteration=15, InterpolantAutomatonStates: 209, 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: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 542 NumberOfCodeBlocks, 542 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 654 ConstructedInterpolants, 0 QuantifiedInterpolants, 4322 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1428 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 49 InterpolantComputations, 19 PerfectInterpolantSequences, 14/66 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-01-28 12:01:12,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...