/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 11:25:34,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 11:25:34,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 11:25:34,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 11:25:34,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 11:25:34,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 11:25:34,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 11:25:34,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 11:25:34,240 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 11:25:34,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 11:25:34,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 11:25:34,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 11:25:34,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 11:25:34,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 11:25:34,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 11:25:34,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 11:25:34,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 11:25:34,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 11:25:34,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 11:25:34,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 11:25:34,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 11:25:34,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 11:25:34,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 11:25:34,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 11:25:34,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 11:25:34,266 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 11:25:34,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 11:25:34,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 11:25:34,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 11:25:34,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 11:25:34,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 11:25:34,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 11:25:34,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 11:25:34,270 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 11:25:34,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 11:25:34,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 11:25:34,271 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 11:25:34,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 11:25:34,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 11:25:34,272 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 11:25:34,273 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 11:25:34,274 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 11:25:34,294 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 11:25:34,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 11:25:34,294 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 11:25:34,294 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 11:25:34,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 11:25:34,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 11:25:34,295 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 11:25:34,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 11:25:34,295 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 11:25:34,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 11:25:34,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 11:25:34,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 11:25:34,295 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 11:25:34,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 11:25:34,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 11:25:34,296 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 11:25:34,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 11:25:34,296 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 11:25:34,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 11:25:34,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 11:25:34,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 11:25:34,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 11:25:34,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 11:25:34,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:25:34,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 11:25:34,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 11:25:34,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 11:25:34,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 11:25:34,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 11:25:34,297 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 11:25:34,297 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 11:25:34,297 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 11:25:34,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 11:25:34,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 11:25:34,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 11:25:34,477 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 11:25:34,477 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 11:25:34,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-01-28 11:25:35,441 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 11:25:35,572 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 11:25:35,573 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-01-28 11:25:35,578 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f44c7301b/266335f0d88d481a9d8358801edfbac0/FLAG9719d2df9 [2023-01-28 11:25:35,586 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f44c7301b/266335f0d88d481a9d8358801edfbac0 [2023-01-28 11:25:35,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 11:25:35,588 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 11:25:35,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 11:25:35,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 11:25:35,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 11:25:35,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f3852f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35, skipping insertion in model container [2023-01-28 11:25:35,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,597 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 11:25:35,606 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 11:25:35,699 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-01-28 11:25:35,701 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:25:35,706 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 11:25:35,717 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-01-28 11:25:35,717 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:25:35,722 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:25:35,722 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:25:35,726 INFO L208 MainTranslator]: Completed translation [2023-01-28 11:25:35,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35 WrapperNode [2023-01-28 11:25:35,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 11:25:35,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 11:25:35,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 11:25:35,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 11:25:35,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,750 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2023-01-28 11:25:35,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 11:25:35,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 11:25:35,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 11:25:35,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 11:25:35,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,756 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,761 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,761 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 11:25:35,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 11:25:35,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 11:25:35,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 11:25:35,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (1/1) ... [2023-01-28 11:25:35,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:25:35,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:35,784 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 11:25:35,785 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 11:25:35,808 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 11:25:35,808 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 11:25:35,808 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 11:25:35,808 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 11:25:35,808 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 11:25:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 11:25:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 11:25:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 11:25:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 11:25:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 11:25:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 11:25:35,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 11:25:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 11:25:35,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 11:25:35,810 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 11:25:35,882 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 11:25:35,884 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 11:25:36,028 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 11:25:36,049 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 11:25:36,049 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 11:25:36,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:25:36 BoogieIcfgContainer [2023-01-28 11:25:36,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 11:25:36,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 11:25:36,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 11:25:36,054 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 11:25:36,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 11:25:35" (1/3) ... [2023-01-28 11:25:36,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568a28eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:25:36, skipping insertion in model container [2023-01-28 11:25:36,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:25:35" (2/3) ... [2023-01-28 11:25:36,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@568a28eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:25:36, skipping insertion in model container [2023-01-28 11:25:36,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:25:36" (3/3) ... [2023-01-28 11:25:36,056 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-01-28 11:25:36,066 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 11:25:36,067 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 11:25:36,067 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 11:25:36,100 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 11:25:36,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2023-01-28 11:25:36,155 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2023-01-28 11:25:36,156 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:25:36,159 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 40 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-01-28 11:25:36,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2023-01-28 11:25:36,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2023-01-28 11:25:36,164 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 11:25:36,169 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2023-01-28 11:25:36,171 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2023-01-28 11:25:36,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2023-01-28 11:25:36,187 INFO L130 PetriNetUnfolder]: 6/71 cut-off events. [2023-01-28 11:25:36,187 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:25:36,188 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 41 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-01-28 11:25:36,188 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-01-28 11:25:37,868 INFO L134 LiptonReduction]: Checked pairs total: 449 [2023-01-28 11:25:37,868 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-01-28 11:25:37,879 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 11:25:37,883 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;@711d85f6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 11:25:37,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 11:25:37,886 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 11:25:37,886 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:25:37,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:37,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:37,887 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 11:25:37,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:37,892 INFO L85 PathProgramCache]: Analyzing trace with hash -507941003, now seen corresponding path program 1 times [2023-01-28 11:25:37,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:37,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864410052] [2023-01-28 11:25:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:37,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:38,196 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 11:25:38,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:38,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864410052] [2023-01-28 11:25:38,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864410052] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:25:38,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:25:38,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 11:25:38,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002776658] [2023-01-28 11:25:38,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:25:38,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:25:38,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:38,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:25:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:25:38,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 145 [2023-01-28 11:25:38,221 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:38,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:38,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 145 [2023-01-28 11:25:38,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:38,259 INFO L130 PetriNetUnfolder]: 54/95 cut-off events. [2023-01-28 11:25:38,259 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 11:25:38,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 95 events. 54/95 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 238 event pairs, 10 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 160. Up to 73 conditions per place. [2023-01-28 11:25:38,260 INFO L137 encePairwiseOnDemand]: 141/145 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-01-28 11:25:38,261 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-01-28 11:25:38,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:25:38,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:25:38,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 249 transitions. [2023-01-28 11:25:38,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42931034482758623 [2023-01-28 11:25:38,269 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 249 transitions. [2023-01-28 11:25:38,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 249 transitions. [2023-01-28 11:25:38,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:38,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 249 transitions. [2023-01-28 11:25:38,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:38,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:38,277 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:38,278 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 249 transitions. [2023-01-28 11:25:38,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-01-28 11:25:38,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 11:25:38,280 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-01-28 11:25:38,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-01-28 11:25:38,283 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-01-28 11:25:38,283 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-01-28 11:25:38,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:38,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:38,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:38,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 11:25:38,284 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 11:25:38,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:38,284 INFO L85 PathProgramCache]: Analyzing trace with hash -259176130, now seen corresponding path program 1 times [2023-01-28 11:25:38,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:38,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716624834] [2023-01-28 11:25:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:38,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:38,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:25:38,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:38,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716624834] [2023-01-28 11:25:38,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716624834] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:25:38,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:25:38,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 11:25:38,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245265844] [2023-01-28 11:25:38,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:25:38,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:25:38,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:38,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:25:38,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:25:38,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 145 [2023-01-28 11:25:38,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:38,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:38,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 145 [2023-01-28 11:25:38,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:38,400 INFO L130 PetriNetUnfolder]: 51/93 cut-off events. [2023-01-28 11:25:38,400 INFO L131 PetriNetUnfolder]: For 22/31 co-relation queries the response was YES. [2023-01-28 11:25:38,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 93 events. 51/93 cut-off events. For 22/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 204 event pairs, 24 based on Foata normal form. 9/84 useless extension candidates. Maximal degree in co-relation 154. Up to 73 conditions per place. [2023-01-28 11:25:38,401 INFO L137 encePairwiseOnDemand]: 141/145 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-01-28 11:25:38,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 114 flow [2023-01-28 11:25:38,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:25:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:25:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 257 transitions. [2023-01-28 11:25:38,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44310344827586207 [2023-01-28 11:25:38,404 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 257 transitions. [2023-01-28 11:25:38,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 257 transitions. [2023-01-28 11:25:38,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:38,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 257 transitions. [2023-01-28 11:25:38,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:38,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:38,407 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:38,407 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 257 transitions. [2023-01-28 11:25:38,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 114 flow [2023-01-28 11:25:38,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 105 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 11:25:38,408 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-01-28 11:25:38,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-01-28 11:25:38,409 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-01-28 11:25:38,409 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-01-28 11:25:38,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:38,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:38,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:38,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 11:25:38,409 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 11:25:38,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:38,410 INFO L85 PathProgramCache]: Analyzing trace with hash 746860219, now seen corresponding path program 1 times [2023-01-28 11:25:38,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:38,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118273524] [2023-01-28 11:25:38,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:38,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:38,663 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 11:25:38,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:38,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118273524] [2023-01-28 11:25:38,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118273524] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:38,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349357208] [2023-01-28 11:25:38,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:38,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:38,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:38,667 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 11:25:38,675 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 11:25:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:38,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 11:25:38,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:38,918 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 11:25:38,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:39,151 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 11:25:39,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349357208] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:39,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:39,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 11:25:39,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867967621] [2023-01-28 11:25:39,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:39,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 11:25:39,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:39,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 11:25:39,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-01-28 11:25:39,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:39,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 20 states, 20 states have (on average 56.9) internal successors, (1138), 20 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:39,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:39,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:39,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:39,668 INFO L130 PetriNetUnfolder]: 167/315 cut-off events. [2023-01-28 11:25:39,668 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-01-28 11:25:39,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 315 events. 167/315 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1203 event pairs, 5 based on Foata normal form. 3/244 useless extension candidates. Maximal degree in co-relation 238. Up to 109 conditions per place. [2023-01-28 11:25:39,673 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 53 selfloop transitions, 26 changer transitions 39/118 dead transitions. [2023-01-28 11:25:39,673 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 118 transitions, 612 flow [2023-01-28 11:25:39,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 11:25:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 11:25:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1106 transitions. [2023-01-28 11:25:39,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42375478927203064 [2023-01-28 11:25:39,678 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1106 transitions. [2023-01-28 11:25:39,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1106 transitions. [2023-01-28 11:25:39,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:39,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1106 transitions. [2023-01-28 11:25:39,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.44444444444444) internal successors, (1106), 18 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:39,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:39,687 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:39,687 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 18 states and 1106 transitions. [2023-01-28 11:25:39,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 118 transitions, 612 flow [2023-01-28 11:25:39,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 118 transitions, 580 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-28 11:25:39,691 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 249 flow [2023-01-28 11:25:39,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=249, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-01-28 11:25:39,692 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2023-01-28 11:25:39,692 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 249 flow [2023-01-28 11:25:39,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.9) internal successors, (1138), 20 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:39,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:39,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:39,707 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 11:25:39,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:39,904 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 11:25:39,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash 979621307, now seen corresponding path program 2 times [2023-01-28 11:25:39,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:39,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358950553] [2023-01-28 11:25:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:39,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:40,065 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 11:25:40,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:40,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358950553] [2023-01-28 11:25:40,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358950553] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:40,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904320857] [2023-01-28 11:25:40,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:25:40,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:40,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:40,067 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 11:25:40,069 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 11:25:40,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:25:40,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:40,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 11:25:40,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:40,213 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 11:25:40,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:40,400 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 11:25:40,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904320857] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:40,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:40,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 11:25:40,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784512114] [2023-01-28 11:25:40,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:40,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 11:25:40,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 11:25:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-01-28 11:25:40,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:40,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 249 flow. Second operand has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:40,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:40,408 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:40,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:41,382 INFO L130 PetriNetUnfolder]: 304/598 cut-off events. [2023-01-28 11:25:41,382 INFO L131 PetriNetUnfolder]: For 1473/1473 co-relation queries the response was YES. [2023-01-28 11:25:41,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 598 events. 304/598 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2830 event pairs, 31 based on Foata normal form. 10/604 useless extension candidates. Maximal degree in co-relation 2310. Up to 228 conditions per place. [2023-01-28 11:25:41,386 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 95 selfloop transitions, 40 changer transitions 70/205 dead transitions. [2023-01-28 11:25:41,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 205 transitions, 1461 flow [2023-01-28 11:25:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 11:25:41,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 11:25:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2115 transitions. [2023-01-28 11:25:41,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41674876847290643 [2023-01-28 11:25:41,392 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2115 transitions. [2023-01-28 11:25:41,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2115 transitions. [2023-01-28 11:25:41,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:41,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2115 transitions. [2023-01-28 11:25:41,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 60.42857142857143) internal successors, (2115), 35 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:41,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:41,406 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:41,406 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 249 flow. Second operand 35 states and 2115 transitions. [2023-01-28 11:25:41,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 205 transitions, 1461 flow [2023-01-28 11:25:41,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 205 transitions, 1286 flow, removed 82 selfloop flow, removed 5 redundant places. [2023-01-28 11:25:41,417 INFO L231 Difference]: Finished difference. Result has 97 places, 74 transitions, 613 flow [2023-01-28 11:25:41,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=613, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2023-01-28 11:25:41,419 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-01-28 11:25:41,419 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 613 flow [2023-01-28 11:25:41,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:41,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:41,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:41,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 11:25:41,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-01-28 11:25:41,628 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 11:25:41,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:41,629 INFO L85 PathProgramCache]: Analyzing trace with hash -632437385, now seen corresponding path program 3 times [2023-01-28 11:25:41,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:41,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933042747] [2023-01-28 11:25:41,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:41,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:41,770 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 11:25:41,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:41,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933042747] [2023-01-28 11:25:41,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933042747] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:41,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032816375] [2023-01-28 11:25:41,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:25:41,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:41,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:41,772 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 11:25:41,816 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 11:25:41,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:25:41,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:41,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 11:25:41,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:41,922 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 11:25:41,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:42,069 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 11:25:42,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032816375] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:42,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:42,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 11:25:42,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44122353] [2023-01-28 11:25:42,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:42,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 11:25:42,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 11:25:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-01-28 11:25:42,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:42,072 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 613 flow. Second operand has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:42,072 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:42,072 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:42,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:42,585 INFO L130 PetriNetUnfolder]: 289/582 cut-off events. [2023-01-28 11:25:42,585 INFO L131 PetriNetUnfolder]: For 5801/5801 co-relation queries the response was YES. [2023-01-28 11:25:42,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 582 events. 289/582 cut-off events. For 5801/5801 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2838 event pairs, 17 based on Foata normal form. 3/585 useless extension candidates. Maximal degree in co-relation 2915. Up to 159 conditions per place. [2023-01-28 11:25:42,589 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 73 selfloop transitions, 50 changer transitions 47/170 dead transitions. [2023-01-28 11:25:42,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 170 transitions, 1577 flow [2023-01-28 11:25:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 11:25:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 11:25:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1343 transitions. [2023-01-28 11:25:42,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42100313479623824 [2023-01-28 11:25:42,592 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1343 transitions. [2023-01-28 11:25:42,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1343 transitions. [2023-01-28 11:25:42,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:42,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1343 transitions. [2023-01-28 11:25:42,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 61.04545454545455) internal successors, (1343), 22 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:42,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:42,598 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:42,598 INFO L175 Difference]: Start difference. First operand has 97 places, 74 transitions, 613 flow. Second operand 22 states and 1343 transitions. [2023-01-28 11:25:42,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 170 transitions, 1577 flow [2023-01-28 11:25:42,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 170 transitions, 1367 flow, removed 104 selfloop flow, removed 11 redundant places. [2023-01-28 11:25:42,615 INFO L231 Difference]: Finished difference. Result has 107 places, 80 transitions, 699 flow [2023-01-28 11:25:42,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=699, PETRI_PLACES=107, PETRI_TRANSITIONS=80} [2023-01-28 11:25:42,617 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-01-28 11:25:42,617 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 80 transitions, 699 flow [2023-01-28 11:25:42,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:42,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:42,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:42,635 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 11:25:42,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:42,825 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 11:25:42,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:42,826 INFO L85 PathProgramCache]: Analyzing trace with hash 2086276037, now seen corresponding path program 4 times [2023-01-28 11:25:42,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:42,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154373228] [2023-01-28 11:25:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:42,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:42,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:42,945 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 11:25:42,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:42,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154373228] [2023-01-28 11:25:42,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154373228] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:42,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50404137] [2023-01-28 11:25:42,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:25:42,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:42,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:42,949 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 11:25:42,951 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 11:25:42,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:25:42,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:42,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 11:25:42,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:43,099 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 11:25:43,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:43,233 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 11:25:43,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50404137] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:43,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:43,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 11:25:43,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48366143] [2023-01-28 11:25:43,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:43,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 11:25:43,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:43,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 11:25:43,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-01-28 11:25:43,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:43,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 80 transitions, 699 flow. Second operand has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:43,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:43,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:43,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:43,688 INFO L130 PetriNetUnfolder]: 295/603 cut-off events. [2023-01-28 11:25:43,688 INFO L131 PetriNetUnfolder]: For 6131/6131 co-relation queries the response was YES. [2023-01-28 11:25:43,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 603 events. 295/603 cut-off events. For 6131/6131 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2999 event pairs, 29 based on Foata normal form. 2/603 useless extension candidates. Maximal degree in co-relation 3086. Up to 160 conditions per place. [2023-01-28 11:25:43,692 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 90 selfloop transitions, 61 changer transitions 22/173 dead transitions. [2023-01-28 11:25:43,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 173 transitions, 1710 flow [2023-01-28 11:25:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 11:25:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 11:25:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1345 transitions. [2023-01-28 11:25:43,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216300940438871 [2023-01-28 11:25:43,695 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1345 transitions. [2023-01-28 11:25:43,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1345 transitions. [2023-01-28 11:25:43,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:43,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1345 transitions. [2023-01-28 11:25:43,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 61.13636363636363) internal successors, (1345), 22 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:43,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:43,728 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:43,728 INFO L175 Difference]: Start difference. First operand has 107 places, 80 transitions, 699 flow. Second operand 22 states and 1345 transitions. [2023-01-28 11:25:43,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 173 transitions, 1710 flow [2023-01-28 11:25:43,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 173 transitions, 1478 flow, removed 75 selfloop flow, removed 14 redundant places. [2023-01-28 11:25:43,757 INFO L231 Difference]: Finished difference. Result has 115 places, 91 transitions, 853 flow [2023-01-28 11:25:43,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=853, PETRI_PLACES=115, PETRI_TRANSITIONS=91} [2023-01-28 11:25:43,757 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 95 predicate places. [2023-01-28 11:25:43,757 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 91 transitions, 853 flow [2023-01-28 11:25:43,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:43,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:43,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:43,762 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 11:25:43,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:43,962 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 11:25:43,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:43,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1344414463, now seen corresponding path program 5 times [2023-01-28 11:25:43,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:43,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734696132] [2023-01-28 11:25:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:43,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:43,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:44,112 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 11:25:44,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734696132] [2023-01-28 11:25:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734696132] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683309420] [2023-01-28 11:25:44,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:25:44,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:44,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:44,114 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 11:25:44,116 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 11:25:44,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:25:44,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:44,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 11:25:44,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:44,319 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 11:25:44,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:44,494 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 11:25:44,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683309420] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:44,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:44,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-28 11:25:44,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252774086] [2023-01-28 11:25:44,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:44,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 11:25:44,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:44,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 11:25:44,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2023-01-28 11:25:44,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:44,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 91 transitions, 853 flow. Second operand has 21 states, 21 states have (on average 56.714285714285715) internal successors, (1191), 21 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:44,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:44,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:44,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:45,021 INFO L130 PetriNetUnfolder]: 277/579 cut-off events. [2023-01-28 11:25:45,021 INFO L131 PetriNetUnfolder]: For 5131/5131 co-relation queries the response was YES. [2023-01-28 11:25:45,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 579 events. 277/579 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2886 event pairs, 5 based on Foata normal form. 1/578 useless extension candidates. Maximal degree in co-relation 2934. Up to 300 conditions per place. [2023-01-28 11:25:45,025 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 80 selfloop transitions, 49 changer transitions 20/149 dead transitions. [2023-01-28 11:25:45,026 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 149 transitions, 1482 flow [2023-01-28 11:25:45,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 11:25:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 11:25:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1030 transitions. [2023-01-28 11:25:45,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178498985801217 [2023-01-28 11:25:45,028 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1030 transitions. [2023-01-28 11:25:45,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1030 transitions. [2023-01-28 11:25:45,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:45,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1030 transitions. [2023-01-28 11:25:45,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.588235294117645) internal successors, (1030), 17 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:45,032 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:45,033 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:45,033 INFO L175 Difference]: Start difference. First operand has 115 places, 91 transitions, 853 flow. Second operand 17 states and 1030 transitions. [2023-01-28 11:25:45,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 149 transitions, 1482 flow [2023-01-28 11:25:45,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 149 transitions, 1285 flow, removed 43 selfloop flow, removed 13 redundant places. [2023-01-28 11:25:45,046 INFO L231 Difference]: Finished difference. Result has 123 places, 96 transitions, 879 flow [2023-01-28 11:25:45,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=879, PETRI_PLACES=123, PETRI_TRANSITIONS=96} [2023-01-28 11:25:45,047 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2023-01-28 11:25:45,047 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 96 transitions, 879 flow [2023-01-28 11:25:45,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.714285714285715) internal successors, (1191), 21 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:45,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:45,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:45,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 11:25:45,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:45,252 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 11:25:45,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:45,252 INFO L85 PathProgramCache]: Analyzing trace with hash 538396011, now seen corresponding path program 6 times [2023-01-28 11:25:45,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:45,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964048414] [2023-01-28 11:25:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:45,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:25:45,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:45,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964048414] [2023-01-28 11:25:45,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964048414] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:45,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469775695] [2023-01-28 11:25:45,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:25:45,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:45,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:45,309 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 11:25:45,312 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 11:25:45,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 11:25:45,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:45,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 11:25:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:25:45,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:25:45,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469775695] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:45,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:45,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-01-28 11:25:45,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027906252] [2023-01-28 11:25:45,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:45,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 11:25:45,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:45,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 11:25:45,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-28 11:25:45,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 145 [2023-01-28 11:25:45,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 96 transitions, 879 flow. Second operand has 7 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:45,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:45,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 145 [2023-01-28 11:25:45,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:45,470 INFO L130 PetriNetUnfolder]: 237/471 cut-off events. [2023-01-28 11:25:45,470 INFO L131 PetriNetUnfolder]: For 5720/5720 co-relation queries the response was YES. [2023-01-28 11:25:45,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2492 conditions, 471 events. 237/471 cut-off events. For 5720/5720 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2059 event pairs, 30 based on Foata normal form. 20/486 useless extension candidates. Maximal degree in co-relation 2415. Up to 401 conditions per place. [2023-01-28 11:25:45,473 INFO L137 encePairwiseOnDemand]: 140/145 looper letters, 79 selfloop transitions, 17 changer transitions 2/101 dead transitions. [2023-01-28 11:25:45,473 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 101 transitions, 1050 flow [2023-01-28 11:25:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:25:45,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:25:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 405 transitions. [2023-01-28 11:25:45,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46551724137931033 [2023-01-28 11:25:45,474 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 405 transitions. [2023-01-28 11:25:45,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 405 transitions. [2023-01-28 11:25:45,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:45,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 405 transitions. [2023-01-28 11:25:45,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:45,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:45,476 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:45,476 INFO L175 Difference]: Start difference. First operand has 123 places, 96 transitions, 879 flow. Second operand 6 states and 405 transitions. [2023-01-28 11:25:45,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 101 transitions, 1050 flow [2023-01-28 11:25:45,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 101 transitions, 949 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-01-28 11:25:45,486 INFO L231 Difference]: Finished difference. Result has 112 places, 86 transitions, 724 flow [2023-01-28 11:25:45,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=112, PETRI_TRANSITIONS=86} [2023-01-28 11:25:45,487 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 92 predicate places. [2023-01-28 11:25:45,487 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 86 transitions, 724 flow [2023-01-28 11:25:45,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:45,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:45,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:45,493 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 11:25:45,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:45,692 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 11:25:45,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:45,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1447872089, now seen corresponding path program 7 times [2023-01-28 11:25:45,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:45,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391903088] [2023-01-28 11:25:45,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:45,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:45,799 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 11:25:45,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:45,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391903088] [2023-01-28 11:25:45,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391903088] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:45,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254872196] [2023-01-28 11:25:45,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:25:45,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:45,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:45,801 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 11:25:45,802 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 11:25:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:45,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 11:25:45,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:45,922 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 11:25:45,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:46,052 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 11:25:46,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254872196] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:46,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:46,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 11:25:46,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62204076] [2023-01-28 11:25:46,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:46,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 11:25:46,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:46,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 11:25:46,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-01-28 11:25:46,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:46,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 86 transitions, 724 flow. Second operand has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:46,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:46,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:46,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:46,905 INFO L130 PetriNetUnfolder]: 333/677 cut-off events. [2023-01-28 11:25:46,905 INFO L131 PetriNetUnfolder]: For 8509/8509 co-relation queries the response was YES. [2023-01-28 11:25:46,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3752 conditions, 677 events. 333/677 cut-off events. For 8509/8509 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3447 event pairs, 29 based on Foata normal form. 4/679 useless extension candidates. Maximal degree in co-relation 3559. Up to 272 conditions per place. [2023-01-28 11:25:46,909 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 105 selfloop transitions, 53 changer transitions 67/225 dead transitions. [2023-01-28 11:25:46,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 225 transitions, 2130 flow [2023-01-28 11:25:46,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 11:25:46,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 11:25:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2105 transitions. [2023-01-28 11:25:46,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147783251231527 [2023-01-28 11:25:46,912 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2105 transitions. [2023-01-28 11:25:46,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2105 transitions. [2023-01-28 11:25:46,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:46,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2105 transitions. [2023-01-28 11:25:46,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 60.142857142857146) internal successors, (2105), 35 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:46,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:46,922 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:46,922 INFO L175 Difference]: Start difference. First operand has 112 places, 86 transitions, 724 flow. Second operand 35 states and 2105 transitions. [2023-01-28 11:25:46,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 225 transitions, 2130 flow [2023-01-28 11:25:46,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 225 transitions, 2039 flow, removed 32 selfloop flow, removed 6 redundant places. [2023-01-28 11:25:46,942 INFO L231 Difference]: Finished difference. Result has 151 places, 98 transitions, 1039 flow [2023-01-28 11:25:46,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1039, PETRI_PLACES=151, PETRI_TRANSITIONS=98} [2023-01-28 11:25:46,943 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 131 predicate places. [2023-01-28 11:25:46,943 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 98 transitions, 1039 flow [2023-01-28 11:25:46,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:46,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:46,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:46,949 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 11:25:47,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:47,144 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 11:25:47,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:47,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1306012647, now seen corresponding path program 8 times [2023-01-28 11:25:47,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:47,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499710888] [2023-01-28 11:25:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:47,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:47,262 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 11:25:47,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:47,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499710888] [2023-01-28 11:25:47,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499710888] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:47,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585892695] [2023-01-28 11:25:47,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:25:47,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:47,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:47,264 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 11:25:47,265 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 11:25:47,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:25:47,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:47,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 11:25:47,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:47,405 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 11:25:47,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:47,538 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 11:25:47,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585892695] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:47,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:47,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 11:25:47,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057908205] [2023-01-28 11:25:47,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:47,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 11:25:47,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 11:25:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-28 11:25:47,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:47,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 98 transitions, 1039 flow. Second operand has 19 states, 19 states have (on average 56.78947368421053) internal successors, (1079), 19 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:47,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:47,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:47,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:48,313 INFO L130 PetriNetUnfolder]: 291/615 cut-off events. [2023-01-28 11:25:48,313 INFO L131 PetriNetUnfolder]: For 12380/12380 co-relation queries the response was YES. [2023-01-28 11:25:48,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4030 conditions, 615 events. 291/615 cut-off events. For 12380/12380 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3168 event pairs, 29 based on Foata normal form. 7/620 useless extension candidates. Maximal degree in co-relation 3930. Up to 267 conditions per place. [2023-01-28 11:25:48,317 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 113 selfloop transitions, 63 changer transitions 26/202 dead transitions. [2023-01-28 11:25:48,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 202 transitions, 2273 flow [2023-01-28 11:25:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 11:25:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 11:25:48,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1572 transitions. [2023-01-28 11:25:48,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169761273209549 [2023-01-28 11:25:48,320 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1572 transitions. [2023-01-28 11:25:48,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1572 transitions. [2023-01-28 11:25:48,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:48,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1572 transitions. [2023-01-28 11:25:48,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 60.46153846153846) internal successors, (1572), 26 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:48,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:48,325 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:48,326 INFO L175 Difference]: Start difference. First operand has 151 places, 98 transitions, 1039 flow. Second operand 26 states and 1572 transitions. [2023-01-28 11:25:48,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 202 transitions, 2273 flow [2023-01-28 11:25:48,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 202 transitions, 1605 flow, removed 250 selfloop flow, removed 37 redundant places. [2023-01-28 11:25:48,346 INFO L231 Difference]: Finished difference. Result has 137 places, 112 transitions, 1050 flow [2023-01-28 11:25:48,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1050, PETRI_PLACES=137, PETRI_TRANSITIONS=112} [2023-01-28 11:25:48,348 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-01-28 11:25:48,348 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 112 transitions, 1050 flow [2023-01-28 11:25:48,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.78947368421053) internal successors, (1079), 19 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:48,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:48,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:48,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 11:25:48,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 11:25:48,552 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 11:25:48,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:48,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1376530827, now seen corresponding path program 9 times [2023-01-28 11:25:48,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:48,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130822759] [2023-01-28 11:25:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:48,683 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 11:25:48,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:48,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130822759] [2023-01-28 11:25:48,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130822759] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:48,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536347809] [2023-01-28 11:25:48,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:25:48,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:48,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:48,684 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 11:25:48,686 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 11:25:48,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:25:48,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:48,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 11:25:48,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:48,819 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 11:25:48,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:48,958 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 11:25:48,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536347809] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:48,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:48,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 11:25:48,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014025408] [2023-01-28 11:25:48,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:48,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 11:25:48,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:48,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 11:25:48,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-28 11:25:48,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:48,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 112 transitions, 1050 flow. Second operand has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:48,961 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:48,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:48,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:49,824 INFO L130 PetriNetUnfolder]: 271/538 cut-off events. [2023-01-28 11:25:49,824 INFO L131 PetriNetUnfolder]: For 6580/6580 co-relation queries the response was YES. [2023-01-28 11:25:49,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3018 conditions, 538 events. 271/538 cut-off events. For 6580/6580 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2489 event pairs, 29 based on Foata normal form. 6/538 useless extension candidates. Maximal degree in co-relation 2920. Up to 267 conditions per place. [2023-01-28 11:25:49,827 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 91 selfloop transitions, 56 changer transitions 39/186 dead transitions. [2023-01-28 11:25:49,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 186 transitions, 1777 flow [2023-01-28 11:25:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 11:25:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 11:25:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1789 transitions. [2023-01-28 11:25:49,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41126436781609194 [2023-01-28 11:25:49,832 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1789 transitions. [2023-01-28 11:25:49,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1789 transitions. [2023-01-28 11:25:49,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:49,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1789 transitions. [2023-01-28 11:25:49,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 59.63333333333333) internal successors, (1789), 30 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:49,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:49,847 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:49,847 INFO L175 Difference]: Start difference. First operand has 137 places, 112 transitions, 1050 flow. Second operand 30 states and 1789 transitions. [2023-01-28 11:25:49,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 186 transitions, 1777 flow [2023-01-28 11:25:49,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 186 transitions, 1484 flow, removed 114 selfloop flow, removed 18 redundant places. [2023-01-28 11:25:49,865 INFO L231 Difference]: Finished difference. Result has 152 places, 107 transitions, 929 flow [2023-01-28 11:25:49,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=929, PETRI_PLACES=152, PETRI_TRANSITIONS=107} [2023-01-28 11:25:49,866 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 132 predicate places. [2023-01-28 11:25:49,866 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 107 transitions, 929 flow [2023-01-28 11:25:49,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:49,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:49,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:49,872 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 11:25:50,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:50,071 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 11:25:50,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:50,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1798480629, now seen corresponding path program 10 times [2023-01-28 11:25:50,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:50,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168761062] [2023-01-28 11:25:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:50,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:50,181 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 11:25:50,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:50,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168761062] [2023-01-28 11:25:50,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168761062] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:50,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832881306] [2023-01-28 11:25:50,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:25:50,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:50,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:50,183 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 11:25:50,210 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 11:25:50,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:25:50,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:50,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 11:25:50,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:50,328 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 11:25:50,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:50,455 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 11:25:50,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832881306] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:50,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:50,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 11:25:50,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426208622] [2023-01-28 11:25:50,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:50,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 11:25:50,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:50,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 11:25:50,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-01-28 11:25:50,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:50,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 107 transitions, 929 flow. Second operand has 19 states, 19 states have (on average 56.78947368421053) internal successors, (1079), 19 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:50,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:50,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:50,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:51,059 INFO L130 PetriNetUnfolder]: 252/497 cut-off events. [2023-01-28 11:25:51,060 INFO L131 PetriNetUnfolder]: For 3511/3511 co-relation queries the response was YES. [2023-01-28 11:25:51,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 497 events. 252/497 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2170 event pairs, 11 based on Foata normal form. 5/492 useless extension candidates. Maximal degree in co-relation 2536. Up to 270 conditions per place. [2023-01-28 11:25:51,063 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 121 selfloop transitions, 34 changer transitions 22/177 dead transitions. [2023-01-28 11:25:51,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 177 transitions, 1718 flow [2023-01-28 11:25:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 11:25:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 11:25:51,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1383 transitions. [2023-01-28 11:25:51,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41469265367316344 [2023-01-28 11:25:51,066 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1383 transitions. [2023-01-28 11:25:51,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1383 transitions. [2023-01-28 11:25:51,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:51,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1383 transitions. [2023-01-28 11:25:51,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 60.130434782608695) internal successors, (1383), 23 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:51,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:51,072 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:51,072 INFO L175 Difference]: Start difference. First operand has 152 places, 107 transitions, 929 flow. Second operand 23 states and 1383 transitions. [2023-01-28 11:25:51,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 177 transitions, 1718 flow [2023-01-28 11:25:51,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 177 transitions, 1503 flow, removed 42 selfloop flow, removed 36 redundant places. [2023-01-28 11:25:51,084 INFO L231 Difference]: Finished difference. Result has 137 places, 107 transitions, 872 flow [2023-01-28 11:25:51,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=872, PETRI_PLACES=137, PETRI_TRANSITIONS=107} [2023-01-28 11:25:51,085 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-01-28 11:25:51,085 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 107 transitions, 872 flow [2023-01-28 11:25:51,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.78947368421053) internal successors, (1079), 19 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:51,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:51,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:51,092 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 11:25:51,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 11:25:51,290 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 11:25:51,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:51,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1918495045, now seen corresponding path program 11 times [2023-01-28 11:25:51,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:51,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654722081] [2023-01-28 11:25:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:51,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:51,431 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 11:25:51,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:51,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654722081] [2023-01-28 11:25:51,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654722081] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:51,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980783550] [2023-01-28 11:25:51,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:25:51,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:51,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:51,433 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 11:25:51,434 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 11:25:51,500 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:25:51,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 11:25:51,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:51,670 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 11:25:51,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:51,805 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 11:25:51,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980783550] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:51,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:51,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-28 11:25:51,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315087579] [2023-01-28 11:25:51,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:51,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 11:25:51,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:51,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 11:25:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-01-28 11:25:51,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:51,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 107 transitions, 872 flow. Second operand has 21 states, 21 states have (on average 56.714285714285715) internal successors, (1191), 21 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:51,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:51,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:51,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:52,108 INFO L130 PetriNetUnfolder]: 224/434 cut-off events. [2023-01-28 11:25:52,109 INFO L131 PetriNetUnfolder]: For 3069/3069 co-relation queries the response was YES. [2023-01-28 11:25:52,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 434 events. 224/434 cut-off events. For 3069/3069 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1755 event pairs, 9 based on Foata normal form. 1/431 useless extension candidates. Maximal degree in co-relation 2144. Up to 362 conditions per place. [2023-01-28 11:25:52,112 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 98 selfloop transitions, 23 changer transitions 8/129 dead transitions. [2023-01-28 11:25:52,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 129 transitions, 1214 flow [2023-01-28 11:25:52,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 11:25:52,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 11:25:52,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 657 transitions. [2023-01-28 11:25:52,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41191222570532915 [2023-01-28 11:25:52,113 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 657 transitions. [2023-01-28 11:25:52,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 657 transitions. [2023-01-28 11:25:52,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:52,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 657 transitions. [2023-01-28 11:25:52,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 59.72727272727273) internal successors, (657), 11 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:52,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:52,116 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:52,116 INFO L175 Difference]: Start difference. First operand has 137 places, 107 transitions, 872 flow. Second operand 11 states and 657 transitions. [2023-01-28 11:25:52,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 129 transitions, 1214 flow [2023-01-28 11:25:52,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 129 transitions, 1116 flow, removed 18 selfloop flow, removed 20 redundant places. [2023-01-28 11:25:52,125 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 859 flow [2023-01-28 11:25:52,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=859, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2023-01-28 11:25:52,125 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-01-28 11:25:52,126 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 859 flow [2023-01-28 11:25:52,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.714285714285715) internal successors, (1191), 21 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:52,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:52,126 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:52,131 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 11:25:52,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 11:25:52,330 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 11:25:52,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:52,330 INFO L85 PathProgramCache]: Analyzing trace with hash -762529050, now seen corresponding path program 12 times [2023-01-28 11:25:52,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:52,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810567240] [2023-01-28 11:25:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:52,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:52,463 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:52,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:52,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810567240] [2023-01-28 11:25:52,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810567240] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:52,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514300328] [2023-01-28 11:25:52,464 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:25:52,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:52,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:52,465 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 11:25:52,467 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 11:25:52,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:25:52,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:52,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 11:25:52,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:52,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:52,839 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:52,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514300328] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:52,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:52,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-01-28 11:25:52,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884074570] [2023-01-28 11:25:52,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:52,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 11:25:52,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 11:25:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-01-28 11:25:52,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:52,841 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 108 transitions, 859 flow. Second operand has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:52,841 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:52,841 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:52,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:53,355 INFO L130 PetriNetUnfolder]: 277/546 cut-off events. [2023-01-28 11:25:53,355 INFO L131 PetriNetUnfolder]: For 3628/3628 co-relation queries the response was YES. [2023-01-28 11:25:53,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 546 events. 277/546 cut-off events. For 3628/3628 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2468 event pairs, 11 based on Foata normal form. 4/546 useless extension candidates. Maximal degree in co-relation 2651. Up to 302 conditions per place. [2023-01-28 11:25:53,358 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 90 selfloop transitions, 71 changer transitions 28/189 dead transitions. [2023-01-28 11:25:53,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 189 transitions, 1716 flow [2023-01-28 11:25:53,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 11:25:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 11:25:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1437 transitions. [2023-01-28 11:25:53,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41293103448275864 [2023-01-28 11:25:53,360 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1437 transitions. [2023-01-28 11:25:53,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1437 transitions. [2023-01-28 11:25:53,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:53,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1437 transitions. [2023-01-28 11:25:53,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 59.875) internal successors, (1437), 24 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:53,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:53,371 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:53,371 INFO L175 Difference]: Start difference. First operand has 125 places, 108 transitions, 859 flow. Second operand 24 states and 1437 transitions. [2023-01-28 11:25:53,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 189 transitions, 1716 flow [2023-01-28 11:25:53,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 189 transitions, 1637 flow, removed 18 selfloop flow, removed 10 redundant places. [2023-01-28 11:25:53,382 INFO L231 Difference]: Finished difference. Result has 145 places, 131 transitions, 1208 flow [2023-01-28 11:25:53,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1208, PETRI_PLACES=145, PETRI_TRANSITIONS=131} [2023-01-28 11:25:53,383 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2023-01-28 11:25:53,383 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 131 transitions, 1208 flow [2023-01-28 11:25:53,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:53,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:53,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:53,388 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 11:25:53,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 11:25:53,588 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 11:25:53,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:53,588 INFO L85 PathProgramCache]: Analyzing trace with hash -944601462, now seen corresponding path program 13 times [2023-01-28 11:25:53,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:53,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856701417] [2023-01-28 11:25:53,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:53,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:53,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:53,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856701417] [2023-01-28 11:25:53,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856701417] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:53,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409671953] [2023-01-28 11:25:53,726 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:25:53,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:53,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:53,727 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:25:53,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 11:25:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:53,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 11:25:53,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:53,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:54,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409671953] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:54,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:54,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-28 11:25:54,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610504220] [2023-01-28 11:25:54,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:54,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 11:25:54,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:54,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 11:25:54,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-01-28 11:25:54,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:54,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 131 transitions, 1208 flow. Second operand has 22 states, 22 states have (on average 56.72727272727273) internal successors, (1248), 22 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:54,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:54,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:54,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:54,593 INFO L130 PetriNetUnfolder]: 368/739 cut-off events. [2023-01-28 11:25:54,593 INFO L131 PetriNetUnfolder]: For 5772/5772 co-relation queries the response was YES. [2023-01-28 11:25:54,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4047 conditions, 739 events. 368/739 cut-off events. For 5772/5772 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3741 event pairs, 13 based on Foata normal form. 6/741 useless extension candidates. Maximal degree in co-relation 3945. Up to 205 conditions per place. [2023-01-28 11:25:54,598 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 109 selfloop transitions, 80 changer transitions 67/256 dead transitions. [2023-01-28 11:25:54,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 256 transitions, 2591 flow [2023-01-28 11:25:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 11:25:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 11:25:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1738 transitions. [2023-01-28 11:25:54,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41331747919143874 [2023-01-28 11:25:54,599 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1738 transitions. [2023-01-28 11:25:54,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1738 transitions. [2023-01-28 11:25:54,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:54,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1738 transitions. [2023-01-28 11:25:54,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 59.93103448275862) internal successors, (1738), 29 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:54,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:54,604 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:54,604 INFO L175 Difference]: Start difference. First operand has 145 places, 131 transitions, 1208 flow. Second operand 29 states and 1738 transitions. [2023-01-28 11:25:54,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 256 transitions, 2591 flow [2023-01-28 11:25:54,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 256 transitions, 2349 flow, removed 79 selfloop flow, removed 12 redundant places. [2023-01-28 11:25:54,619 INFO L231 Difference]: Finished difference. Result has 173 places, 128 transitions, 1364 flow [2023-01-28 11:25:54,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1364, PETRI_PLACES=173, PETRI_TRANSITIONS=128} [2023-01-28 11:25:54,620 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-01-28 11:25:54,620 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 128 transitions, 1364 flow [2023-01-28 11:25:54,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.72727272727273) internal successors, (1248), 22 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:54,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:54,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:54,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 11:25:54,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 11:25:54,826 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 11:25:54,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:54,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1875183464, now seen corresponding path program 14 times [2023-01-28 11:25:54,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:54,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72441319] [2023-01-28 11:25:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:54,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:54,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:54,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:54,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72441319] [2023-01-28 11:25:54,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72441319] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:54,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534622320] [2023-01-28 11:25:54,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:25:54,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:54,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:54,952 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:25:54,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 11:25:55,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:25:55,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 11:25:55,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:55,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:55,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534622320] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:55,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:55,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-01-28 11:25:55,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714507597] [2023-01-28 11:25:55,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:55,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 11:25:55,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:55,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 11:25:55,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-01-28 11:25:55,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:55,279 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 128 transitions, 1364 flow. Second operand has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:55,279 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:55,279 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:55,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:56,053 INFO L130 PetriNetUnfolder]: 402/798 cut-off events. [2023-01-28 11:25:56,054 INFO L131 PetriNetUnfolder]: For 10464/10464 co-relation queries the response was YES. [2023-01-28 11:25:56,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5262 conditions, 798 events. 402/798 cut-off events. For 10464/10464 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4068 event pairs, 13 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 5137. Up to 223 conditions per place. [2023-01-28 11:25:56,059 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 123 selfloop transitions, 96 changer transitions 32/251 dead transitions. [2023-01-28 11:25:56,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3165 flow [2023-01-28 11:25:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 11:25:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 11:25:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1864 transitions. [2023-01-28 11:25:56,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146829810901001 [2023-01-28 11:25:56,061 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1864 transitions. [2023-01-28 11:25:56,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1864 transitions. [2023-01-28 11:25:56,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:56,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1864 transitions. [2023-01-28 11:25:56,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 60.12903225806452) internal successors, (1864), 31 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:56,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 145.0) internal successors, (4640), 32 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:56,066 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 145.0) internal successors, (4640), 32 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:56,066 INFO L175 Difference]: Start difference. First operand has 173 places, 128 transitions, 1364 flow. Second operand 31 states and 1864 transitions. [2023-01-28 11:25:56,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3165 flow [2023-01-28 11:25:56,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 251 transitions, 2504 flow, removed 295 selfloop flow, removed 23 redundant places. [2023-01-28 11:25:56,088 INFO L231 Difference]: Finished difference. Result has 175 places, 152 transitions, 1761 flow [2023-01-28 11:25:56,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1761, PETRI_PLACES=175, PETRI_TRANSITIONS=152} [2023-01-28 11:25:56,089 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 155 predicate places. [2023-01-28 11:25:56,089 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 152 transitions, 1761 flow [2023-01-28 11:25:56,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:56,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:56,089 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:56,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 11:25:56,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:56,294 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 11:25:56,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:56,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1804665284, now seen corresponding path program 15 times [2023-01-28 11:25:56,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:56,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863480703] [2023-01-28 11:25:56,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:56,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:56,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:56,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863480703] [2023-01-28 11:25:56,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863480703] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:56,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331149011] [2023-01-28 11:25:56,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:25:56,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:56,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:56,427 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:25:56,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 11:25:56,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:25:56,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:56,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 11:25:56,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:56,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:56,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331149011] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:56,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:56,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-01-28 11:25:56,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169655133] [2023-01-28 11:25:56,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:56,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 11:25:56,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 11:25:56,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-01-28 11:25:56,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:56,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 152 transitions, 1761 flow. Second operand has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:56,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:56,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:56,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:57,571 INFO L130 PetriNetUnfolder]: 371/747 cut-off events. [2023-01-28 11:25:57,571 INFO L131 PetriNetUnfolder]: For 9071/9071 co-relation queries the response was YES. [2023-01-28 11:25:57,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 747 events. 371/747 cut-off events. For 9071/9071 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3741 event pairs, 11 based on Foata normal form. 5/748 useless extension candidates. Maximal degree in co-relation 4675. Up to 221 conditions per place. [2023-01-28 11:25:57,579 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 120 selfloop transitions, 98 changer transitions 31/249 dead transitions. [2023-01-28 11:25:57,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 249 transitions, 2918 flow [2023-01-28 11:25:57,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 11:25:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 11:25:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1746 transitions. [2023-01-28 11:25:57,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41521997621878715 [2023-01-28 11:25:57,585 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1746 transitions. [2023-01-28 11:25:57,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1746 transitions. [2023-01-28 11:25:57,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:57,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1746 transitions. [2023-01-28 11:25:57,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 60.206896551724135) internal successors, (1746), 29 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:57,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:57,590 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:57,590 INFO L175 Difference]: Start difference. First operand has 175 places, 152 transitions, 1761 flow. Second operand 29 states and 1746 transitions. [2023-01-28 11:25:57,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 249 transitions, 2918 flow [2023-01-28 11:25:57,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 249 transitions, 2458 flow, removed 177 selfloop flow, removed 18 redundant places. [2023-01-28 11:25:57,610 INFO L231 Difference]: Finished difference. Result has 190 places, 154 transitions, 1710 flow [2023-01-28 11:25:57,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1710, PETRI_PLACES=190, PETRI_TRANSITIONS=154} [2023-01-28 11:25:57,610 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2023-01-28 11:25:57,610 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 154 transitions, 1710 flow [2023-01-28 11:25:57,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:57,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:57,611 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:57,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 11:25:57,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 11:25:57,815 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 11:25:57,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:57,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1268773024, now seen corresponding path program 16 times [2023-01-28 11:25:57,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:57,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731483261] [2023-01-28 11:25:57,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:57,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:57,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:57,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731483261] [2023-01-28 11:25:57,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731483261] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:57,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210193934] [2023-01-28 11:25:57,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:25:57,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:57,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:57,918 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:25:57,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 11:25:57,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:25:57,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:57,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 11:25:57,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:58,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:58,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:58,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210193934] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:58,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:58,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-28 11:25:58,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406894899] [2023-01-28 11:25:58,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:58,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 11:25:58,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:58,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 11:25:58,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-01-28 11:25:58,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:58,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 154 transitions, 1710 flow. Second operand has 21 states, 21 states have (on average 56.76190476190476) internal successors, (1192), 21 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:58,219 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:58,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:58,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:25:58,735 INFO L130 PetriNetUnfolder]: 394/790 cut-off events. [2023-01-28 11:25:58,736 INFO L131 PetriNetUnfolder]: For 10103/10103 co-relation queries the response was YES. [2023-01-28 11:25:58,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 790 events. 394/790 cut-off events. For 10103/10103 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3994 event pairs, 15 based on Foata normal form. 5/791 useless extension candidates. Maximal degree in co-relation 4945. Up to 511 conditions per place. [2023-01-28 11:25:58,741 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 157 selfloop transitions, 41 changer transitions 41/239 dead transitions. [2023-01-28 11:25:58,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 239 transitions, 2764 flow [2023-01-28 11:25:58,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 11:25:58,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 11:25:58,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1545 transitions. [2023-01-28 11:25:58,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40981432360742703 [2023-01-28 11:25:58,757 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1545 transitions. [2023-01-28 11:25:58,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1545 transitions. [2023-01-28 11:25:58,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:25:58,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1545 transitions. [2023-01-28 11:25:58,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 59.42307692307692) internal successors, (1545), 26 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:58,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:58,762 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:58,762 INFO L175 Difference]: Start difference. First operand has 190 places, 154 transitions, 1710 flow. Second operand 26 states and 1545 transitions. [2023-01-28 11:25:58,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 239 transitions, 2764 flow [2023-01-28 11:25:58,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 239 transitions, 2488 flow, removed 61 selfloop flow, removed 23 redundant places. [2023-01-28 11:25:58,785 INFO L231 Difference]: Finished difference. Result has 194 places, 157 transitions, 1684 flow [2023-01-28 11:25:58,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1684, PETRI_PLACES=194, PETRI_TRANSITIONS=157} [2023-01-28 11:25:58,786 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-01-28 11:25:58,787 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 157 transitions, 1684 flow [2023-01-28 11:25:58,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.76190476190476) internal successors, (1192), 21 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:58,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:25:58,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:25:58,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 11:25:58,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 11:25:58,991 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 11:25:58,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:25:58,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1188036426, now seen corresponding path program 17 times [2023-01-28 11:25:58,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:25:58,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700937707] [2023-01-28 11:25:58,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:25:58,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:25:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:25:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:59,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:25:59,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700937707] [2023-01-28 11:25:59,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700937707] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:25:59,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155051334] [2023-01-28 11:25:59,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:25:59,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:25:59,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:25:59,122 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:25:59,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 11:25:59,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:25:59,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:25:59,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 11:25:59,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:25:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:59,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:25:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:25:59,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155051334] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:25:59,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:25:59,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-28 11:25:59,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547675243] [2023-01-28 11:25:59,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:25:59,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 11:25:59,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:25:59,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 11:25:59,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-01-28 11:25:59,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:25:59,439 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 157 transitions, 1684 flow. Second operand has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:25:59,439 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:25:59,439 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:25:59,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:00,142 INFO L130 PetriNetUnfolder]: 466/942 cut-off events. [2023-01-28 11:26:00,142 INFO L131 PetriNetUnfolder]: For 17504/17504 co-relation queries the response was YES. [2023-01-28 11:26:00,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 942 events. 466/942 cut-off events. For 17504/17504 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4987 event pairs, 19 based on Foata normal form. 7/945 useless extension candidates. Maximal degree in co-relation 6269. Up to 517 conditions per place. [2023-01-28 11:26:00,148 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 178 selfloop transitions, 57 changer transitions 32/267 dead transitions. [2023-01-28 11:26:00,148 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 267 transitions, 3232 flow [2023-01-28 11:26:00,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 11:26:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 11:26:00,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1617 transitions. [2023-01-28 11:26:00,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41302681992337165 [2023-01-28 11:26:00,150 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1617 transitions. [2023-01-28 11:26:00,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1617 transitions. [2023-01-28 11:26:00,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:00,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1617 transitions. [2023-01-28 11:26:00,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 59.888888888888886) internal successors, (1617), 27 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:00,154 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:00,154 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:00,154 INFO L175 Difference]: Start difference. First operand has 194 places, 157 transitions, 1684 flow. Second operand 27 states and 1617 transitions. [2023-01-28 11:26:00,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 267 transitions, 3232 flow [2023-01-28 11:26:00,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 267 transitions, 2923 flow, removed 128 selfloop flow, removed 18 redundant places. [2023-01-28 11:26:00,182 INFO L231 Difference]: Finished difference. Result has 204 places, 174 transitions, 2008 flow [2023-01-28 11:26:00,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2008, PETRI_PLACES=204, PETRI_TRANSITIONS=174} [2023-01-28 11:26:00,182 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 184 predicate places. [2023-01-28 11:26:00,182 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 174 transitions, 2008 flow [2023-01-28 11:26:00,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:00,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:00,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:00,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:00,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:00,387 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 11:26:00,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash 2122586034, now seen corresponding path program 18 times [2023-01-28 11:26:00,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:00,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893797813] [2023-01-28 11:26:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:00,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:00,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:00,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:00,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893797813] [2023-01-28 11:26:00,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893797813] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:00,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765823263] [2023-01-28 11:26:00,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:26:00,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:00,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:00,525 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:00,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 11:26:00,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:26:00,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:00,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 11:26:00,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:00,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:00,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765823263] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:00,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:00,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-28 11:26:00,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203846266] [2023-01-28 11:26:00,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:00,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 11:26:00,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:00,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 11:26:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-01-28 11:26:00,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:00,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 174 transitions, 2008 flow. Second operand has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:00,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:00,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:00,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:01,766 INFO L130 PetriNetUnfolder]: 556/1126 cut-off events. [2023-01-28 11:26:01,767 INFO L131 PetriNetUnfolder]: For 22866/22866 co-relation queries the response was YES. [2023-01-28 11:26:01,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7954 conditions, 1126 events. 556/1126 cut-off events. For 22866/22866 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6267 event pairs, 25 based on Foata normal form. 5/1127 useless extension candidates. Maximal degree in co-relation 7887. Up to 616 conditions per place. [2023-01-28 11:26:01,774 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 191 selfloop transitions, 68 changer transitions 39/298 dead transitions. [2023-01-28 11:26:01,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 298 transitions, 3805 flow [2023-01-28 11:26:01,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 11:26:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 11:26:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1630 transitions. [2023-01-28 11:26:01,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4163473818646232 [2023-01-28 11:26:01,780 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1630 transitions. [2023-01-28 11:26:01,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1630 transitions. [2023-01-28 11:26:01,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:01,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1630 transitions. [2023-01-28 11:26:01,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 60.370370370370374) internal successors, (1630), 27 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:01,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:01,786 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:01,786 INFO L175 Difference]: Start difference. First operand has 204 places, 174 transitions, 2008 flow. Second operand 27 states and 1630 transitions. [2023-01-28 11:26:01,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 298 transitions, 3805 flow [2023-01-28 11:26:01,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 298 transitions, 3518 flow, removed 121 selfloop flow, removed 16 redundant places. [2023-01-28 11:26:01,838 INFO L231 Difference]: Finished difference. Result has 222 places, 196 transitions, 2493 flow [2023-01-28 11:26:01,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2493, PETRI_PLACES=222, PETRI_TRANSITIONS=196} [2023-01-28 11:26:01,838 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 202 predicate places. [2023-01-28 11:26:01,838 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 196 transitions, 2493 flow [2023-01-28 11:26:01,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:01,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:01,840 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:01,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:02,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:02,045 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 11:26:02,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:02,046 INFO L85 PathProgramCache]: Analyzing trace with hash 56355927, now seen corresponding path program 19 times [2023-01-28 11:26:02,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:02,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428035483] [2023-01-28 11:26:02,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:02,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:02,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:02,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:02,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428035483] [2023-01-28 11:26:02,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428035483] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:02,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33989324] [2023-01-28 11:26:02,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:26:02,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:02,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:02,184 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:02,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 11:26:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:02,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 11:26:02,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:02,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:02,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33989324] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:02,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:02,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-01-28 11:26:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728018668] [2023-01-28 11:26:02,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:02,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 11:26:02,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:02,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 11:26:02,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-01-28 11:26:02,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:02,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 196 transitions, 2493 flow. Second operand has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:02,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:02,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:02,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:03,717 INFO L130 PetriNetUnfolder]: 743/1452 cut-off events. [2023-01-28 11:26:03,717 INFO L131 PetriNetUnfolder]: For 36204/36204 co-relation queries the response was YES. [2023-01-28 11:26:03,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10999 conditions, 1452 events. 743/1452 cut-off events. For 36204/36204 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8361 event pairs, 37 based on Foata normal form. 8/1456 useless extension candidates. Maximal degree in co-relation 10923. Up to 581 conditions per place. [2023-01-28 11:26:03,727 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 189 selfloop transitions, 149 changer transitions 36/374 dead transitions. [2023-01-28 11:26:03,727 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 374 transitions, 4925 flow [2023-01-28 11:26:03,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 11:26:03,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 11:26:03,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2274 transitions. [2023-01-28 11:26:03,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127041742286751 [2023-01-28 11:26:03,729 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2274 transitions. [2023-01-28 11:26:03,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2274 transitions. [2023-01-28 11:26:03,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:03,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2274 transitions. [2023-01-28 11:26:03,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 59.8421052631579) internal successors, (2274), 38 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:03,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:03,735 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:03,735 INFO L175 Difference]: Start difference. First operand has 222 places, 196 transitions, 2493 flow. Second operand 38 states and 2274 transitions. [2023-01-28 11:26:03,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 374 transitions, 4925 flow [2023-01-28 11:26:03,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 374 transitions, 4570 flow, removed 145 selfloop flow, removed 15 redundant places. [2023-01-28 11:26:03,820 INFO L231 Difference]: Finished difference. Result has 249 places, 247 transitions, 3451 flow [2023-01-28 11:26:03,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3451, PETRI_PLACES=249, PETRI_TRANSITIONS=247} [2023-01-28 11:26:03,821 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2023-01-28 11:26:03,821 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 247 transitions, 3451 flow [2023-01-28 11:26:03,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:03,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:03,821 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:03,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:04,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:04,025 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 11:26:04,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:04,025 INFO L85 PathProgramCache]: Analyzing trace with hash -376590837, now seen corresponding path program 20 times [2023-01-28 11:26:04,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:04,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661670823] [2023-01-28 11:26:04,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:04,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:04,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661670823] [2023-01-28 11:26:04,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661670823] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089260234] [2023-01-28 11:26:04,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:26:04,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:04,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:04,180 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:04,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 11:26:04,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:26:04,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:04,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 11:26:04,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:04,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:04,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089260234] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:04,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:04,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-28 11:26:04,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781729137] [2023-01-28 11:26:04,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:04,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 11:26:04,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:04,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 11:26:04,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-01-28 11:26:04,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:04,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 247 transitions, 3451 flow. Second operand has 24 states, 24 states have (on average 56.666666666666664) internal successors, (1360), 24 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:04,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:04,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:04,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:05,647 INFO L130 PetriNetUnfolder]: 1024/1951 cut-off events. [2023-01-28 11:26:05,648 INFO L131 PetriNetUnfolder]: For 66721/66721 co-relation queries the response was YES. [2023-01-28 11:26:05,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17262 conditions, 1951 events. 1024/1951 cut-off events. For 66721/66721 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11822 event pairs, 63 based on Foata normal form. 16/1963 useless extension candidates. Maximal degree in co-relation 17179. Up to 915 conditions per place. [2023-01-28 11:26:05,661 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 256 selfloop transitions, 118 changer transitions 89/463 dead transitions. [2023-01-28 11:26:05,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 463 transitions, 7305 flow [2023-01-28 11:26:05,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-28 11:26:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-28 11:26:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2732 transitions. [2023-01-28 11:26:05,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095952023988006 [2023-01-28 11:26:05,667 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2732 transitions. [2023-01-28 11:26:05,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2732 transitions. [2023-01-28 11:26:05,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:05,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2732 transitions. [2023-01-28 11:26:05,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 59.391304347826086) internal successors, (2732), 46 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:05,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:05,673 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:05,673 INFO L175 Difference]: Start difference. First operand has 249 places, 247 transitions, 3451 flow. Second operand 46 states and 2732 transitions. [2023-01-28 11:26:05,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 463 transitions, 7305 flow [2023-01-28 11:26:05,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 463 transitions, 6297 flow, removed 432 selfloop flow, removed 25 redundant places. [2023-01-28 11:26:05,823 INFO L231 Difference]: Finished difference. Result has 282 places, 270 transitions, 3999 flow [2023-01-28 11:26:05,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3999, PETRI_PLACES=282, PETRI_TRANSITIONS=270} [2023-01-28 11:26:05,824 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 262 predicate places. [2023-01-28 11:26:05,824 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 270 transitions, 3999 flow [2023-01-28 11:26:05,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 56.666666666666664) internal successors, (1360), 24 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:05,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:05,824 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:05,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:06,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-28 11:26:06,029 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 11:26:06,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:06,029 INFO L85 PathProgramCache]: Analyzing trace with hash -857253995, now seen corresponding path program 21 times [2023-01-28 11:26:06,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:06,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842719202] [2023-01-28 11:26:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:06,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:26:06,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:06,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842719202] [2023-01-28 11:26:06,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842719202] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:06,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31307579] [2023-01-28 11:26:06,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:26:06,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:06,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:06,148 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:06,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 11:26:06,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:26:06,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:06,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 11:26:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:06,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:06,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:26:06,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31307579] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:06,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:06,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 21 [2023-01-28 11:26:06,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109408645] [2023-01-28 11:26:06,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:06,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 11:26:06,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:06,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 11:26:06,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-01-28 11:26:06,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:06,481 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 270 transitions, 3999 flow. Second operand has 23 states, 23 states have (on average 56.82608695652174) internal successors, (1307), 23 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:06,481 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:06,481 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:06,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:07,901 INFO L130 PetriNetUnfolder]: 1208/2243 cut-off events. [2023-01-28 11:26:07,902 INFO L131 PetriNetUnfolder]: For 95392/95392 co-relation queries the response was YES. [2023-01-28 11:26:07,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21946 conditions, 2243 events. 1208/2243 cut-off events. For 95392/95392 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13533 event pairs, 83 based on Foata normal form. 8/2247 useless extension candidates. Maximal degree in co-relation 21847. Up to 1364 conditions per place. [2023-01-28 11:26:07,923 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 291 selfloop transitions, 162 changer transitions 32/485 dead transitions. [2023-01-28 11:26:07,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 485 transitions, 8434 flow [2023-01-28 11:26:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-28 11:26:07,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-28 11:26:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2671 transitions. [2023-01-28 11:26:07,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40934865900383144 [2023-01-28 11:26:07,925 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2671 transitions. [2023-01-28 11:26:07,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2671 transitions. [2023-01-28 11:26:07,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:07,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2671 transitions. [2023-01-28 11:26:07,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 59.355555555555554) internal successors, (2671), 45 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:07,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:07,931 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:07,931 INFO L175 Difference]: Start difference. First operand has 282 places, 270 transitions, 3999 flow. Second operand 45 states and 2671 transitions. [2023-01-28 11:26:07,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 485 transitions, 8434 flow [2023-01-28 11:26:08,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 485 transitions, 7272 flow, removed 500 selfloop flow, removed 34 redundant places. [2023-01-28 11:26:08,147 INFO L231 Difference]: Finished difference. Result has 288 places, 353 transitions, 5741 flow [2023-01-28 11:26:08,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5741, PETRI_PLACES=288, PETRI_TRANSITIONS=353} [2023-01-28 11:26:08,147 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 268 predicate places. [2023-01-28 11:26:08,147 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 353 transitions, 5741 flow [2023-01-28 11:26:08,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.82608695652174) internal successors, (1307), 23 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:08,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:08,148 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:08,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:08,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 11:26:08,357 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 11:26:08,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:08,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1236654659, now seen corresponding path program 22 times [2023-01-28 11:26:08,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:08,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467557618] [2023-01-28 11:26:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:08,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:08,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:08,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467557618] [2023-01-28 11:26:08,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467557618] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:08,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121780861] [2023-01-28 11:26:08,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:26:08,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:08,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:08,498 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:08,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 11:26:08,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:26:08,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:08,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 11:26:08,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:08,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:08,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:08,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:08,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121780861] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:08,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:08,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-28 11:26:08,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672492976] [2023-01-28 11:26:08,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:08,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 11:26:08,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:08,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 11:26:08,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-01-28 11:26:08,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:08,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 353 transitions, 5741 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:08,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:08,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:08,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:10,269 INFO L130 PetriNetUnfolder]: 1239/2321 cut-off events. [2023-01-28 11:26:10,269 INFO L131 PetriNetUnfolder]: For 105658/105658 co-relation queries the response was YES. [2023-01-28 11:26:10,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22555 conditions, 2321 events. 1239/2321 cut-off events. For 105658/105658 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14077 event pairs, 63 based on Foata normal form. 11/2328 useless extension candidates. Maximal degree in co-relation 22455. Up to 1049 conditions per place. [2023-01-28 11:26:10,289 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 309 selfloop transitions, 180 changer transitions 33/522 dead transitions. [2023-01-28 11:26:10,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 522 transitions, 9259 flow [2023-01-28 11:26:10,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 11:26:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 11:26:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2501 transitions. [2023-01-28 11:26:10,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41067323481116585 [2023-01-28 11:26:10,295 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2501 transitions. [2023-01-28 11:26:10,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2501 transitions. [2023-01-28 11:26:10,295 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:10,295 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2501 transitions. [2023-01-28 11:26:10,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 59.54761904761905) internal successors, (2501), 42 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:10,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:10,300 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:10,300 INFO L175 Difference]: Start difference. First operand has 288 places, 353 transitions, 5741 flow. Second operand 42 states and 2501 transitions. [2023-01-28 11:26:10,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 522 transitions, 9259 flow [2023-01-28 11:26:10,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 522 transitions, 7914 flow, removed 626 selfloop flow, removed 25 redundant places. [2023-01-28 11:26:10,587 INFO L231 Difference]: Finished difference. Result has 312 places, 363 transitions, 5781 flow [2023-01-28 11:26:10,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4930, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5781, PETRI_PLACES=312, PETRI_TRANSITIONS=363} [2023-01-28 11:26:10,588 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-01-28 11:26:10,588 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 363 transitions, 5781 flow [2023-01-28 11:26:10,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:10,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:10,588 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:10,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:10,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:10,793 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 11:26:10,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:10,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1224381777, now seen corresponding path program 23 times [2023-01-28 11:26:10,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:10,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127805579] [2023-01-28 11:26:10,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:10,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:10,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:10,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:10,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127805579] [2023-01-28 11:26:10,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127805579] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:10,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409792767] [2023-01-28 11:26:10,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:26:10,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:10,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:10,954 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:10,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 11:26:11,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:26:11,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:11,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 11:26:11,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:11,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:11,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409792767] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:11,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:11,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-28 11:26:11,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117788136] [2023-01-28 11:26:11,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:11,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 11:26:11,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:11,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 11:26:11,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-01-28 11:26:11,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:11,319 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 363 transitions, 5781 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:11,319 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:11,319 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:11,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:13,303 INFO L130 PetriNetUnfolder]: 1665/3168 cut-off events. [2023-01-28 11:26:13,303 INFO L131 PetriNetUnfolder]: For 159603/159603 co-relation queries the response was YES. [2023-01-28 11:26:13,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31816 conditions, 3168 events. 1665/3168 cut-off events. For 159603/159603 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21180 event pairs, 57 based on Foata normal form. 26/3190 useless extension candidates. Maximal degree in co-relation 31709. Up to 1694 conditions per place. [2023-01-28 11:26:13,329 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 409 selfloop transitions, 190 changer transitions 74/673 dead transitions. [2023-01-28 11:26:13,329 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 673 transitions, 11632 flow [2023-01-28 11:26:13,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-01-28 11:26:13,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-01-28 11:26:13,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3299 transitions. [2023-01-28 11:26:13,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4136677115987461 [2023-01-28 11:26:13,331 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3299 transitions. [2023-01-28 11:26:13,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3299 transitions. [2023-01-28 11:26:13,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:13,332 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3299 transitions. [2023-01-28 11:26:13,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 59.981818181818184) internal successors, (3299), 55 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:13,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:13,338 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:13,339 INFO L175 Difference]: Start difference. First operand has 312 places, 363 transitions, 5781 flow. Second operand 55 states and 3299 transitions. [2023-01-28 11:26:13,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 673 transitions, 11632 flow [2023-01-28 11:26:13,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 673 transitions, 11103 flow, removed 156 selfloop flow, removed 30 redundant places. [2023-01-28 11:26:13,741 INFO L231 Difference]: Finished difference. Result has 340 places, 484 transitions, 8710 flow [2023-01-28 11:26:13,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=8710, PETRI_PLACES=340, PETRI_TRANSITIONS=484} [2023-01-28 11:26:13,742 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2023-01-28 11:26:13,742 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 484 transitions, 8710 flow [2023-01-28 11:26:13,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:13,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:13,742 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:13,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-28 11:26:13,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:13,943 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 11:26:13,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1590475332, now seen corresponding path program 24 times [2023-01-28 11:26:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:13,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377498206] [2023-01-28 11:26:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:13,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:13,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:14,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:14,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377498206] [2023-01-28 11:26:14,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377498206] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:14,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719689809] [2023-01-28 11:26:14,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:26:14,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:14,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:14,121 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:14,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 11:26:14,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:26:14,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:14,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 11:26:14,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:14,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:14,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:14,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719689809] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:14,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:14,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-28 11:26:14,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162729828] [2023-01-28 11:26:14,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:14,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 11:26:14,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:14,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 11:26:14,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2023-01-28 11:26:14,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:14,562 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 484 transitions, 8710 flow. Second operand has 28 states, 28 states have (on average 56.57142857142857) internal successors, (1584), 28 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:14,562 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:14,562 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:14,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:17,211 INFO L130 PetriNetUnfolder]: 2973/5695 cut-off events. [2023-01-28 11:26:17,212 INFO L131 PetriNetUnfolder]: For 363228/363228 co-relation queries the response was YES. [2023-01-28 11:26:17,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65947 conditions, 5695 events. 2973/5695 cut-off events. For 363228/363228 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43216 event pairs, 99 based on Foata normal form. 39/5730 useless extension candidates. Maximal degree in co-relation 65835. Up to 1775 conditions per place. [2023-01-28 11:26:17,265 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 476 selfloop transitions, 439 changer transitions 90/1005 dead transitions. [2023-01-28 11:26:17,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1005 transitions, 20173 flow [2023-01-28 11:26:17,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-01-28 11:26:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-01-28 11:26:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3194 transitions. [2023-01-28 11:26:17,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41561483409238775 [2023-01-28 11:26:17,268 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3194 transitions. [2023-01-28 11:26:17,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3194 transitions. [2023-01-28 11:26:17,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:17,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3194 transitions. [2023-01-28 11:26:17,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 60.264150943396224) internal successors, (3194), 53 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:17,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:17,275 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:17,275 INFO L175 Difference]: Start difference. First operand has 340 places, 484 transitions, 8710 flow. Second operand 53 states and 3194 transitions. [2023-01-28 11:26:17,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1005 transitions, 20173 flow [2023-01-28 11:26:18,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1005 transitions, 17491 flow, removed 1243 selfloop flow, removed 31 redundant places. [2023-01-28 11:26:18,232 INFO L231 Difference]: Finished difference. Result has 371 places, 750 transitions, 13577 flow [2023-01-28 11:26:18,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6456, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=13577, PETRI_PLACES=371, PETRI_TRANSITIONS=750} [2023-01-28 11:26:18,232 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 351 predicate places. [2023-01-28 11:26:18,233 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 750 transitions, 13577 flow [2023-01-28 11:26:18,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 56.57142857142857) internal successors, (1584), 28 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:18,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:18,233 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:18,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:18,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 11:26:18,436 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:26:18,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:18,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1528243986, now seen corresponding path program 25 times [2023-01-28 11:26:18,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:18,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449957695] [2023-01-28 11:26:18,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:18,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:18,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449957695] [2023-01-28 11:26:18,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449957695] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155566215] [2023-01-28 11:26:18,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:26:18,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:18,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:18,610 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:18,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 11:26:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:18,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 11:26:18,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:18,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:19,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155566215] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:19,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:19,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-28 11:26:19,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093301813] [2023-01-28 11:26:19,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:19,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 11:26:19,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:19,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 11:26:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-01-28 11:26:19,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:19,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 750 transitions, 13577 flow. Second operand has 28 states, 28 states have (on average 56.642857142857146) internal successors, (1586), 28 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:19,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:19,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:19,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:21,869 INFO L130 PetriNetUnfolder]: 3346/6465 cut-off events. [2023-01-28 11:26:21,869 INFO L131 PetriNetUnfolder]: For 341006/341006 co-relation queries the response was YES. [2023-01-28 11:26:21,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73310 conditions, 6465 events. 3346/6465 cut-off events. For 341006/341006 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 50467 event pairs, 173 based on Foata normal form. 45/6506 useless extension candidates. Maximal degree in co-relation 73189. Up to 3403 conditions per place. [2023-01-28 11:26:21,924 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 567 selfloop transitions, 284 changer transitions 183/1034 dead transitions. [2023-01-28 11:26:21,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1034 transitions, 21725 flow [2023-01-28 11:26:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-28 11:26:21,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-28 11:26:21,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2669 transitions. [2023-01-28 11:26:21,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40904214559386975 [2023-01-28 11:26:21,927 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2669 transitions. [2023-01-28 11:26:21,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2669 transitions. [2023-01-28 11:26:21,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:21,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2669 transitions. [2023-01-28 11:26:21,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 59.31111111111111) internal successors, (2669), 45 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:21,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:21,932 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:21,932 INFO L175 Difference]: Start difference. First operand has 371 places, 750 transitions, 13577 flow. Second operand 45 states and 2669 transitions. [2023-01-28 11:26:21,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1034 transitions, 21725 flow [2023-01-28 11:26:23,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1034 transitions, 19051 flow, removed 1271 selfloop flow, removed 29 redundant places. [2023-01-28 11:26:23,342 INFO L231 Difference]: Finished difference. Result has 399 places, 763 transitions, 13433 flow [2023-01-28 11:26:23,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=11913, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13433, PETRI_PLACES=399, PETRI_TRANSITIONS=763} [2023-01-28 11:26:23,343 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-01-28 11:26:23,343 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 763 transitions, 13433 flow [2023-01-28 11:26:23,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 56.642857142857146) internal successors, (1586), 28 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:23,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:23,344 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:23,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-01-28 11:26:23,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 11:26:23,544 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:26:23,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:23,544 INFO L85 PathProgramCache]: Analyzing trace with hash 834360269, now seen corresponding path program 26 times [2023-01-28 11:26:23,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:23,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492009155] [2023-01-28 11:26:23,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:23,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:23,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:23,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492009155] [2023-01-28 11:26:23,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492009155] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:23,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722241667] [2023-01-28 11:26:23,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:26:23,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:23,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:23,690 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:23,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 11:26:23,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:26:23,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:23,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 11:26:23,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:23,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:24,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722241667] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:24,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:24,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-01-28 11:26:24,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771785713] [2023-01-28 11:26:24,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:24,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 11:26:24,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:24,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 11:26:24,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-01-28 11:26:24,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:24,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 763 transitions, 13433 flow. Second operand has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:24,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:24,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:24,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:26,428 INFO L130 PetriNetUnfolder]: 2635/5302 cut-off events. [2023-01-28 11:26:26,428 INFO L131 PetriNetUnfolder]: For 177078/177078 co-relation queries the response was YES. [2023-01-28 11:26:26,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50188 conditions, 5302 events. 2635/5302 cut-off events. For 177078/177078 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41478 event pairs, 81 based on Foata normal form. 30/5328 useless extension candidates. Maximal degree in co-relation 50059. Up to 1415 conditions per place. [2023-01-28 11:26:26,483 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 416 selfloop transitions, 422 changer transitions 155/993 dead transitions. [2023-01-28 11:26:26,484 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 993 transitions, 19676 flow [2023-01-28 11:26:26,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-28 11:26:26,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-28 11:26:26,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2677 transitions. [2023-01-28 11:26:26,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4102681992337165 [2023-01-28 11:26:26,487 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2677 transitions. [2023-01-28 11:26:26,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2677 transitions. [2023-01-28 11:26:26,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:26,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2677 transitions. [2023-01-28 11:26:26,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 59.48888888888889) internal successors, (2677), 45 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:26,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:26,493 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:26,493 INFO L175 Difference]: Start difference. First operand has 399 places, 763 transitions, 13433 flow. Second operand 45 states and 2677 transitions. [2023-01-28 11:26:26,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 993 transitions, 19676 flow [2023-01-28 11:26:27,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 993 transitions, 18505 flow, removed 499 selfloop flow, removed 39 redundant places. [2023-01-28 11:26:27,519 INFO L231 Difference]: Finished difference. Result has 402 places, 749 transitions, 14038 flow [2023-01-28 11:26:27,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12630, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=14038, PETRI_PLACES=402, PETRI_TRANSITIONS=749} [2023-01-28 11:26:27,520 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 382 predicate places. [2023-01-28 11:26:27,520 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 749 transitions, 14038 flow [2023-01-28 11:26:27,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:27,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:27,521 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:27,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:27,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 11:26:27,725 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:26:27,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:27,725 INFO L85 PathProgramCache]: Analyzing trace with hash -25703553, now seen corresponding path program 27 times [2023-01-28 11:26:27,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:27,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210848897] [2023-01-28 11:26:27,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:27,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:27,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210848897] [2023-01-28 11:26:27,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210848897] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346045309] [2023-01-28 11:26:27,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:26:27,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:27,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:27,876 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:27,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 11:26:27,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 11:26:27,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:27,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 11:26:27,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:28,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:28,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346045309] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:28,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:28,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-01-28 11:26:28,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555522907] [2023-01-28 11:26:28,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:28,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 11:26:28,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 11:26:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2023-01-28 11:26:28,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:28,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 749 transitions, 14038 flow. Second operand has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:28,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:28,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:28,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:30,693 INFO L130 PetriNetUnfolder]: 2416/4845 cut-off events. [2023-01-28 11:26:30,694 INFO L131 PetriNetUnfolder]: For 160642/160642 co-relation queries the response was YES. [2023-01-28 11:26:30,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45963 conditions, 4845 events. 2416/4845 cut-off events. For 160642/160642 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37225 event pairs, 83 based on Foata normal form. 28/4869 useless extension candidates. Maximal degree in co-relation 45835. Up to 1415 conditions per place. [2023-01-28 11:26:30,812 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 397 selfloop transitions, 429 changer transitions 52/878 dead transitions. [2023-01-28 11:26:30,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 878 transitions, 16975 flow [2023-01-28 11:26:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 11:26:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 11:26:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2613 transitions. [2023-01-28 11:26:30,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095611285266458 [2023-01-28 11:26:30,815 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2613 transitions. [2023-01-28 11:26:30,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2613 transitions. [2023-01-28 11:26:30,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:30,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2613 transitions. [2023-01-28 11:26:30,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 59.38636363636363) internal successors, (2613), 44 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:30,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:30,819 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:30,820 INFO L175 Difference]: Start difference. First operand has 402 places, 749 transitions, 14038 flow. Second operand 44 states and 2613 transitions. [2023-01-28 11:26:30,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 878 transitions, 16975 flow [2023-01-28 11:26:31,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 878 transitions, 15765 flow, removed 492 selfloop flow, removed 38 redundant places. [2023-01-28 11:26:31,952 INFO L231 Difference]: Finished difference. Result has 399 places, 743 transitions, 13814 flow [2023-01-28 11:26:31,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12973, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=13814, PETRI_PLACES=399, PETRI_TRANSITIONS=743} [2023-01-28 11:26:31,953 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-01-28 11:26:31,954 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 743 transitions, 13814 flow [2023-01-28 11:26:31,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:31,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:31,954 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:31,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:32,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 11:26:32,158 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:26:32,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash 125395759, now seen corresponding path program 28 times [2023-01-28 11:26:32,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:32,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095529608] [2023-01-28 11:26:32,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:32,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:32,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:32,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:32,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095529608] [2023-01-28 11:26:32,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095529608] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:32,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173141443] [2023-01-28 11:26:32,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:26:32,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:32,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:32,332 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:32,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 11:26:32,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:26:32,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:32,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 11:26:32,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:32,560 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:32,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:32,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173141443] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:32,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:32,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-01-28 11:26:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537457850] [2023-01-28 11:26:32,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:32,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 11:26:32,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:32,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 11:26:32,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2023-01-28 11:26:32,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:32,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 743 transitions, 13814 flow. Second operand has 31 states, 31 states have (on average 56.58064516129032) internal successors, (1754), 31 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:32,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:32,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:32,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:36,011 INFO L130 PetriNetUnfolder]: 3625/6950 cut-off events. [2023-01-28 11:26:36,011 INFO L131 PetriNetUnfolder]: For 199928/199928 co-relation queries the response was YES. [2023-01-28 11:26:36,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67025 conditions, 6950 events. 3625/6950 cut-off events. For 199928/199928 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 53940 event pairs, 171 based on Foata normal form. 50/6996 useless extension candidates. Maximal degree in co-relation 66903. Up to 1805 conditions per place. [2023-01-28 11:26:36,077 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 364 selfloop transitions, 558 changer transitions 384/1306 dead transitions. [2023-01-28 11:26:36,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1306 transitions, 28646 flow [2023-01-28 11:26:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-01-28 11:26:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-01-28 11:26:36,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3084 transitions. [2023-01-28 11:26:36,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090185676392573 [2023-01-28 11:26:36,081 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3084 transitions. [2023-01-28 11:26:36,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3084 transitions. [2023-01-28 11:26:36,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:36,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3084 transitions. [2023-01-28 11:26:36,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 59.30769230769231) internal successors, (3084), 52 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:36,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:36,087 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:36,087 INFO L175 Difference]: Start difference. First operand has 399 places, 743 transitions, 13814 flow. Second operand 52 states and 3084 transitions. [2023-01-28 11:26:36,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1306 transitions, 28646 flow [2023-01-28 11:26:37,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1306 transitions, 26993 flow, removed 165 selfloop flow, removed 39 redundant places. [2023-01-28 11:26:37,269 INFO L231 Difference]: Finished difference. Result has 414 places, 812 transitions, 16633 flow [2023-01-28 11:26:37,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12766, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=16633, PETRI_PLACES=414, PETRI_TRANSITIONS=812} [2023-01-28 11:26:37,271 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 394 predicate places. [2023-01-28 11:26:37,271 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 812 transitions, 16633 flow [2023-01-28 11:26:37,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.58064516129032) internal successors, (1754), 31 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:37,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:37,271 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:37,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-28 11:26:37,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:37,476 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:26:37,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:37,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1213169703, now seen corresponding path program 29 times [2023-01-28 11:26:37,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:37,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822681824] [2023-01-28 11:26:37,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:37,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:37,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:37,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:37,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822681824] [2023-01-28 11:26:37,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822681824] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:37,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028758867] [2023-01-28 11:26:37,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:26:37,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:37,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:37,693 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:37,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 11:26:37,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:26:37,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:37,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 11:26:37,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:37,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:37,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:38,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028758867] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:38,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:38,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-01-28 11:26:38,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703140849] [2023-01-28 11:26:38,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:38,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 11:26:38,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:38,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 11:26:38,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-01-28 11:26:38,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:38,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 812 transitions, 16633 flow. Second operand has 30 states, 30 states have (on average 56.53333333333333) internal successors, (1696), 30 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:38,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:38,143 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:38,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:41,095 INFO L130 PetriNetUnfolder]: 2999/5935 cut-off events. [2023-01-28 11:26:41,096 INFO L131 PetriNetUnfolder]: For 160320/160320 co-relation queries the response was YES. [2023-01-28 11:26:41,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56225 conditions, 5935 events. 2999/5935 cut-off events. For 160320/160320 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 45872 event pairs, 151 based on Foata normal form. 29/5960 useless extension candidates. Maximal degree in co-relation 56103. Up to 3402 conditions per place. [2023-01-28 11:26:41,150 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 719 selfloop transitions, 234 changer transitions 149/1102 dead transitions. [2023-01-28 11:26:41,150 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1102 transitions, 22714 flow [2023-01-28 11:26:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-28 11:26:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-28 11:26:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2730 transitions. [2023-01-28 11:26:41,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40929535232383807 [2023-01-28 11:26:41,152 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2730 transitions. [2023-01-28 11:26:41,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2730 transitions. [2023-01-28 11:26:41,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:41,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2730 transitions. [2023-01-28 11:26:41,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 59.34782608695652) internal successors, (2730), 46 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:41,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:41,157 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:41,157 INFO L175 Difference]: Start difference. First operand has 414 places, 812 transitions, 16633 flow. Second operand 46 states and 2730 transitions. [2023-01-28 11:26:41,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1102 transitions, 22714 flow [2023-01-28 11:26:42,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1102 transitions, 20479 flow, removed 858 selfloop flow, removed 47 redundant places. [2023-01-28 11:26:42,359 INFO L231 Difference]: Finished difference. Result has 403 places, 873 transitions, 16702 flow [2023-01-28 11:26:42,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=14940, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=16702, PETRI_PLACES=403, PETRI_TRANSITIONS=873} [2023-01-28 11:26:42,360 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-01-28 11:26:42,360 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 873 transitions, 16702 flow [2023-01-28 11:26:42,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.53333333333333) internal successors, (1696), 30 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:42,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:42,361 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:42,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:42,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:42,565 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:26:42,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:42,565 INFO L85 PathProgramCache]: Analyzing trace with hash -808262398, now seen corresponding path program 30 times [2023-01-28 11:26:42,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:42,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352283604] [2023-01-28 11:26:42,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:42,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:26:42,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:42,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352283604] [2023-01-28 11:26:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352283604] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:42,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138804257] [2023-01-28 11:26:42,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:26:42,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:42,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:42,747 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:42,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 11:26:42,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 11:26:42,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:42,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 11:26:42,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:43,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:26:43,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138804257] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:43,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:43,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 30 [2023-01-28 11:26:43,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397749697] [2023-01-28 11:26:43,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:43,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 11:26:43,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 11:26:43,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-01-28 11:26:43,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:43,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 873 transitions, 16702 flow. Second operand has 32 states, 32 states have (on average 56.53125) internal successors, (1809), 32 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:43,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:43,371 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:43,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:45,933 INFO L130 PetriNetUnfolder]: 2565/5240 cut-off events. [2023-01-28 11:26:45,934 INFO L131 PetriNetUnfolder]: For 111733/111733 co-relation queries the response was YES. [2023-01-28 11:26:45,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46269 conditions, 5240 events. 2565/5240 cut-off events. For 111733/111733 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 40939 event pairs, 77 based on Foata normal form. 64/5300 useless extension candidates. Maximal degree in co-relation 46155. Up to 1509 conditions per place. [2023-01-28 11:26:45,980 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 457 selfloop transitions, 512 changer transitions 72/1041 dead transitions. [2023-01-28 11:26:45,980 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1041 transitions, 21050 flow [2023-01-28 11:26:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-28 11:26:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-28 11:26:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2887 transitions. [2023-01-28 11:26:45,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4063335679099226 [2023-01-28 11:26:45,983 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2887 transitions. [2023-01-28 11:26:45,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2887 transitions. [2023-01-28 11:26:45,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:45,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2887 transitions. [2023-01-28 11:26:45,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 58.91836734693877) internal successors, (2887), 49 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:45,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:45,989 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:45,989 INFO L175 Difference]: Start difference. First operand has 403 places, 873 transitions, 16702 flow. Second operand 49 states and 2887 transitions. [2023-01-28 11:26:45,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1041 transitions, 21050 flow [2023-01-28 11:26:46,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1041 transitions, 20410 flow, removed 268 selfloop flow, removed 32 redundant places. [2023-01-28 11:26:46,884 INFO L231 Difference]: Finished difference. Result has 412 places, 891 transitions, 18343 flow [2023-01-28 11:26:46,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=16130, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=18343, PETRI_PLACES=412, PETRI_TRANSITIONS=891} [2023-01-28 11:26:46,885 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-01-28 11:26:46,886 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 891 transitions, 18343 flow [2023-01-28 11:26:46,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 56.53125) internal successors, (1809), 32 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:46,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:46,886 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:46,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:47,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-28 11:26:47,091 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:26:47,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:47,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1662152656, now seen corresponding path program 31 times [2023-01-28 11:26:47,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:47,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290900364] [2023-01-28 11:26:47,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:47,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:26:47,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:47,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290900364] [2023-01-28 11:26:47,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290900364] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:47,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989118880] [2023-01-28 11:26:47,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:26:47,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:47,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:47,317 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:47,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 11:26:47,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:47,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 11:26:47,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:47,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:47,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:47,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989118880] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:47,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:47,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 29 [2023-01-28 11:26:47,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634317412] [2023-01-28 11:26:47,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:47,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 11:26:47,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:47,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 11:26:47,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2023-01-28 11:26:47,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:47,883 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 891 transitions, 18343 flow. Second operand has 31 states, 31 states have (on average 56.58064516129032) internal successors, (1754), 31 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:47,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:47,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:47,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:50,469 INFO L130 PetriNetUnfolder]: 2335/4642 cut-off events. [2023-01-28 11:26:50,469 INFO L131 PetriNetUnfolder]: For 85783/85783 co-relation queries the response was YES. [2023-01-28 11:26:50,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41724 conditions, 4642 events. 2335/4642 cut-off events. For 85783/85783 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34274 event pairs, 3 based on Foata normal form. 30/4668 useless extension candidates. Maximal degree in co-relation 41612. Up to 2668 conditions per place. [2023-01-28 11:26:50,511 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 752 selfloop transitions, 259 changer transitions 50/1061 dead transitions. [2023-01-28 11:26:50,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1061 transitions, 22180 flow [2023-01-28 11:26:50,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 11:26:50,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 11:26:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2262 transitions. [2023-01-28 11:26:50,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2023-01-28 11:26:50,513 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2262 transitions. [2023-01-28 11:26:50,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2262 transitions. [2023-01-28 11:26:50,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:50,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2262 transitions. [2023-01-28 11:26:50,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 59.526315789473685) internal successors, (2262), 38 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:50,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:50,518 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:50,518 INFO L175 Difference]: Start difference. First operand has 412 places, 891 transitions, 18343 flow. Second operand 38 states and 2262 transitions. [2023-01-28 11:26:50,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1061 transitions, 22180 flow [2023-01-28 11:26:51,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1061 transitions, 21212 flow, removed 235 selfloop flow, removed 43 redundant places. [2023-01-28 11:26:51,204 INFO L231 Difference]: Finished difference. Result has 413 places, 941 transitions, 19037 flow [2023-01-28 11:26:51,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=17393, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=19037, PETRI_PLACES=413, PETRI_TRANSITIONS=941} [2023-01-28 11:26:51,204 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 393 predicate places. [2023-01-28 11:26:51,205 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 941 transitions, 19037 flow [2023-01-28 11:26:51,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.58064516129032) internal successors, (1754), 31 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:51,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:51,205 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:51,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-01-28 11:26:51,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:51,405 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:26:51,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:51,406 INFO L85 PathProgramCache]: Analyzing trace with hash 543377190, now seen corresponding path program 32 times [2023-01-28 11:26:51,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:51,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403657343] [2023-01-28 11:26:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:51,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:51,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:51,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:51,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403657343] [2023-01-28 11:26:51,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403657343] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:51,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030783982] [2023-01-28 11:26:51,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:26:51,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:51,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:51,622 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:51,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 11:26:51,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:26:51,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:51,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 11:26:51,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:51,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:52,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030783982] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:52,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:52,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-01-28 11:26:52,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439253371] [2023-01-28 11:26:52,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:52,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 11:26:52,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:52,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 11:26:52,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-01-28 11:26:52,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:52,141 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 941 transitions, 19037 flow. Second operand has 32 states, 32 states have (on average 56.53125) internal successors, (1809), 32 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:52,141 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:52,141 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:52,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:26:55,520 INFO L130 PetriNetUnfolder]: 3109/6832 cut-off events. [2023-01-28 11:26:55,521 INFO L131 PetriNetUnfolder]: For 113362/113362 co-relation queries the response was YES. [2023-01-28 11:26:55,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55455 conditions, 6832 events. 3109/6832 cut-off events. For 113362/113362 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59404 event pairs, 7 based on Foata normal form. 84/6912 useless extension candidates. Maximal degree in co-relation 55335. Up to 2818 conditions per place. [2023-01-28 11:26:55,594 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 931 selfloop transitions, 302 changer transitions 474/1707 dead transitions. [2023-01-28 11:26:55,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1707 transitions, 32940 flow [2023-01-28 11:26:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-28 11:26:55,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-28 11:26:55,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3883 transitions. [2023-01-28 11:26:55,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119893899204244 [2023-01-28 11:26:55,598 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3883 transitions. [2023-01-28 11:26:55,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3883 transitions. [2023-01-28 11:26:55,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:26:55,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3883 transitions. [2023-01-28 11:26:55,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 59.738461538461536) internal successors, (3883), 65 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:55,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 145.0) internal successors, (9570), 66 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:55,605 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 145.0) internal successors, (9570), 66 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:55,605 INFO L175 Difference]: Start difference. First operand has 413 places, 941 transitions, 19037 flow. Second operand 65 states and 3883 transitions. [2023-01-28 11:26:55,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1707 transitions, 32940 flow [2023-01-28 11:26:56,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1707 transitions, 32635 flow, removed 83 selfloop flow, removed 23 redundant places. [2023-01-28 11:26:56,578 INFO L231 Difference]: Finished difference. Result has 477 places, 1043 transitions, 21861 flow [2023-01-28 11:26:56,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=18882, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=21861, PETRI_PLACES=477, PETRI_TRANSITIONS=1043} [2023-01-28 11:26:56,579 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 457 predicate places. [2023-01-28 11:26:56,579 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1043 transitions, 21861 flow [2023-01-28 11:26:56,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 56.53125) internal successors, (1809), 32 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:56,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:26:56,580 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:26:56,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-01-28 11:26:56,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:56,780 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:26:56,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:26:56,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1301031468, now seen corresponding path program 33 times [2023-01-28 11:26:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:26:56,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916564709] [2023-01-28 11:26:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:26:56,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:26:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:26:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:56,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:26:56,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916564709] [2023-01-28 11:26:56,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916564709] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:26:56,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989964140] [2023-01-28 11:26:56,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:26:56,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:56,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:26:56,973 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:26:56,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 11:26:57,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-01-28 11:26:57,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:26:57,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 11:26:57,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:26:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:57,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:26:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:26:57,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989964140] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:26:57,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:26:57,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-01-28 11:26:57,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091706920] [2023-01-28 11:26:57,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:26:57,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 11:26:57,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:26:57,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 11:26:57,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 11:26:57,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:26:57,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1043 transitions, 21861 flow. Second operand has 33 states, 33 states have (on average 56.484848484848484) internal successors, (1864), 33 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:26:57,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:26:57,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:26:57,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:27:00,969 INFO L130 PetriNetUnfolder]: 3094/6954 cut-off events. [2023-01-28 11:27:00,969 INFO L131 PetriNetUnfolder]: For 162610/162610 co-relation queries the response was YES. [2023-01-28 11:27:01,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61972 conditions, 6954 events. 3094/6954 cut-off events. For 162610/162610 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 61590 event pairs, 3 based on Foata normal form. 137/7087 useless extension candidates. Maximal degree in co-relation 61831. Up to 2668 conditions per place. [2023-01-28 11:27:01,037 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 724 selfloop transitions, 492 changer transitions 144/1360 dead transitions. [2023-01-28 11:27:01,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1360 transitions, 30216 flow [2023-01-28 11:27:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 11:27:01,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 11:27:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2086 transitions. [2023-01-28 11:27:01,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110344827586207 [2023-01-28 11:27:01,039 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2086 transitions. [2023-01-28 11:27:01,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2086 transitions. [2023-01-28 11:27:01,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:27:01,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2086 transitions. [2023-01-28 11:27:01,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 59.6) internal successors, (2086), 35 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:01,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:01,043 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:01,043 INFO L175 Difference]: Start difference. First operand has 477 places, 1043 transitions, 21861 flow. Second operand 35 states and 2086 transitions. [2023-01-28 11:27:01,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 1360 transitions, 30216 flow [2023-01-28 11:27:02,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1360 transitions, 26633 flow, removed 1403 selfloop flow, removed 48 redundant places. [2023-01-28 11:27:02,671 INFO L231 Difference]: Finished difference. Result has 445 places, 1163 transitions, 23234 flow [2023-01-28 11:27:02,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=19952, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=23234, PETRI_PLACES=445, PETRI_TRANSITIONS=1163} [2023-01-28 11:27:02,672 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 425 predicate places. [2023-01-28 11:27:02,672 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1163 transitions, 23234 flow [2023-01-28 11:27:02,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.484848484848484) internal successors, (1864), 33 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:02,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:27:02,672 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:27:02,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-01-28 11:27:02,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-01-28 11:27:02,873 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:27:02,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:27:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash -34981713, now seen corresponding path program 34 times [2023-01-28 11:27:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:27:02,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667523797] [2023-01-28 11:27:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:27:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:27:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:27:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:27:03,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:27:03,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667523797] [2023-01-28 11:27:03,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667523797] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:27:03,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371071212] [2023-01-28 11:27:03,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:27:03,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:27:03,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:27:03,035 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:27:03,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 11:27:03,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:27:03,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:27:03,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 11:27:03,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:27:03,271 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:27:03,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:27:03,558 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:27:03,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371071212] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:27:03,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:27:03,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 31 [2023-01-28 11:27:03,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796820345] [2023-01-28 11:27:03,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:27:03,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 11:27:03,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:27:03,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 11:27:03,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 11:27:03,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:27:03,560 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1163 transitions, 23234 flow. Second operand has 33 states, 33 states have (on average 56.57575757575758) internal successors, (1867), 33 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:03,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:27:03,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:27:03,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:27:05,794 INFO L130 PetriNetUnfolder]: 2730/5071 cut-off events. [2023-01-28 11:27:05,795 INFO L131 PetriNetUnfolder]: For 64336/64336 co-relation queries the response was YES. [2023-01-28 11:27:05,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45809 conditions, 5071 events. 2730/5071 cut-off events. For 64336/64336 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34760 event pairs, 3 based on Foata normal form. 12/5079 useless extension candidates. Maximal degree in co-relation 45687. Up to 2030 conditions per place. [2023-01-28 11:27:05,846 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 662 selfloop transitions, 572 changer transitions 83/1317 dead transitions. [2023-01-28 11:27:05,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 1317 transitions, 27831 flow [2023-01-28 11:27:05,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 11:27:05,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 11:27:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2317 transitions. [2023-01-28 11:27:05,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097259062776304 [2023-01-28 11:27:05,848 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2317 transitions. [2023-01-28 11:27:05,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2317 transitions. [2023-01-28 11:27:05,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:27:05,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2317 transitions. [2023-01-28 11:27:05,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 59.41025641025641) internal successors, (2317), 39 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:05,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:05,852 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:05,852 INFO L175 Difference]: Start difference. First operand has 445 places, 1163 transitions, 23234 flow. Second operand 39 states and 2317 transitions. [2023-01-28 11:27:05,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 1317 transitions, 27831 flow [2023-01-28 11:27:06,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1317 transitions, 26548 flow, removed 505 selfloop flow, removed 26 redundant places. [2023-01-28 11:27:06,586 INFO L231 Difference]: Finished difference. Result has 451 places, 1176 transitions, 24146 flow [2023-01-28 11:27:06,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=22013, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24146, PETRI_PLACES=451, PETRI_TRANSITIONS=1176} [2023-01-28 11:27:06,587 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 431 predicate places. [2023-01-28 11:27:06,587 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 1176 transitions, 24146 flow [2023-01-28 11:27:06,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.57575757575758) internal successors, (1867), 33 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:06,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:27:06,587 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:27:06,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 11:27:06,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-28 11:27:06,791 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:27:06,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:27:06,792 INFO L85 PathProgramCache]: Analyzing trace with hash -801870177, now seen corresponding path program 35 times [2023-01-28 11:27:06,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:27:06,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977739822] [2023-01-28 11:27:06,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:27:06,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:27:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:27:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:27:06,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:27:06,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977739822] [2023-01-28 11:27:06,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977739822] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:27:06,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147715617] [2023-01-28 11:27:06,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:27:06,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:27:06,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:27:06,991 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:27:06,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 11:27:07,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-01-28 11:27:07,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:27:07,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 11:27:07,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:27:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:27:07,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:27:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:27:07,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147715617] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:27:07,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:27:07,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 32 [2023-01-28 11:27:07,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971981378] [2023-01-28 11:27:07,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:27:07,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 11:27:07,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:27:07,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 11:27:07,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 11:27:07,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:27:07,552 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 1176 transitions, 24146 flow. Second operand has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:07,552 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:27:07,552 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:27:07,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:27:09,912 INFO L130 PetriNetUnfolder]: 2657/4893 cut-off events. [2023-01-28 11:27:09,912 INFO L131 PetriNetUnfolder]: For 58703/58703 co-relation queries the response was YES. [2023-01-28 11:27:09,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44050 conditions, 4893 events. 2657/4893 cut-off events. For 58703/58703 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33134 event pairs, 3 based on Foata normal form. 9/4898 useless extension candidates. Maximal degree in co-relation 43931. Up to 2030 conditions per place. [2023-01-28 11:27:09,954 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 523 selfloop transitions, 36 changer transitions 717/1276 dead transitions. [2023-01-28 11:27:09,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1276 transitions, 27396 flow [2023-01-28 11:27:09,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 11:27:09,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 11:27:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2423 transitions. [2023-01-28 11:27:09,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407569386038688 [2023-01-28 11:27:09,956 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2423 transitions. [2023-01-28 11:27:09,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2423 transitions. [2023-01-28 11:27:09,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:27:09,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2423 transitions. [2023-01-28 11:27:09,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 59.09756097560975) internal successors, (2423), 41 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:09,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:09,960 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:09,960 INFO L175 Difference]: Start difference. First operand has 451 places, 1176 transitions, 24146 flow. Second operand 41 states and 2423 transitions. [2023-01-28 11:27:09,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1276 transitions, 27396 flow [2023-01-28 11:27:10,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1276 transitions, 26889 flow, removed 177 selfloop flow, removed 29 redundant places. [2023-01-28 11:27:10,580 INFO L231 Difference]: Finished difference. Result has 456 places, 548 transitions, 8216 flow [2023-01-28 11:27:10,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=23747, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8216, PETRI_PLACES=456, PETRI_TRANSITIONS=548} [2023-01-28 11:27:10,580 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 436 predicate places. [2023-01-28 11:27:10,581 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 548 transitions, 8216 flow [2023-01-28 11:27:10,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:10,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:27:10,581 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:27:10,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-28 11:27:10,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-28 11:27:10,785 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:27:10,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:27:10,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1643464096, now seen corresponding path program 36 times [2023-01-28 11:27:10,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:27:10,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726971382] [2023-01-28 11:27:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:27:10,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:27:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:27:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:27:11,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:27:11,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726971382] [2023-01-28 11:27:11,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726971382] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:27:11,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926636756] [2023-01-28 11:27:11,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:27:11,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:27:11,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:27:11,006 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:27:11,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 11:27:11,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-01-28 11:27:11,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:27:11,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 11:27:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:27:11,309 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:27:11,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:27:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:27:11,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926636756] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:27:11,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:27:11,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 40 [2023-01-28 11:27:11,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095751232] [2023-01-28 11:27:11,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:27:11,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 11:27:11,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:27:11,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 11:27:11,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1376, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 11:27:11,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 11:27:11,711 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 548 transitions, 8216 flow. Second operand has 42 states, 42 states have (on average 56.42857142857143) internal successors, (2370), 42 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:11,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:27:11,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 11:27:11,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:27:13,282 INFO L130 PetriNetUnfolder]: 1693/3215 cut-off events. [2023-01-28 11:27:13,283 INFO L131 PetriNetUnfolder]: For 10432/10432 co-relation queries the response was YES. [2023-01-28 11:27:13,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21453 conditions, 3215 events. 1693/3215 cut-off events. For 10432/10432 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20402 event pairs, 0 based on Foata normal form. 17/3230 useless extension candidates. Maximal degree in co-relation 21339. Up to 985 conditions per place. [2023-01-28 11:27:13,304 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 0 selfloop transitions, 0 changer transitions 905/905 dead transitions. [2023-01-28 11:27:13,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 905 transitions, 14323 flow [2023-01-28 11:27:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-28 11:27:13,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-28 11:27:13,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2985 transitions. [2023-01-28 11:27:13,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40365111561866124 [2023-01-28 11:27:13,307 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2985 transitions. [2023-01-28 11:27:13,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2985 transitions. [2023-01-28 11:27:13,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:27:13,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2985 transitions. [2023-01-28 11:27:13,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 58.529411764705884) internal successors, (2985), 51 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:13,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 145.0) internal successors, (7540), 52 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:13,312 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 145.0) internal successors, (7540), 52 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:13,312 INFO L175 Difference]: Start difference. First operand has 456 places, 548 transitions, 8216 flow. Second operand 51 states and 2985 transitions. [2023-01-28 11:27:13,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 905 transitions, 14323 flow [2023-01-28 11:27:13,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 905 transitions, 13429 flow, removed 258 selfloop flow, removed 42 redundant places. [2023-01-28 11:27:13,424 INFO L231 Difference]: Finished difference. Result has 276 places, 0 transitions, 0 flow [2023-01-28 11:27:13,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=0, PETRI_PLACES=276, PETRI_TRANSITIONS=0} [2023-01-28 11:27:13,425 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-01-28 11:27:13,425 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 0 transitions, 0 flow [2023-01-28 11:27:13,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 56.42857142857143) internal successors, (2370), 42 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:27:13,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 11:27:13,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 11:27:13,427 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 11:27:13,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-01-28 11:27:13,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:27:13,632 INFO L445 BasicCegarLoop]: Path program histogram: [36, 1, 1] [2023-01-28 11:27:13,634 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 11:27:13,634 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 11:27:13,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 11:27:13 BasicIcfg [2023-01-28 11:27:13,636 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 11:27:13,636 INFO L158 Benchmark]: Toolchain (without parser) took 98047.85ms. Allocated memory was 369.1MB in the beginning and 4.2GB in the end (delta: 3.9GB). Free memory was 339.6MB in the beginning and 882.2MB in the end (delta: -542.6MB). Peak memory consumption was 3.3GB. Max. memory is 16.0GB. [2023-01-28 11:27:13,636 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 11:27:13,636 INFO L158 Benchmark]: CACSL2BoogieTranslator took 137.40ms. Allocated memory is still 369.1MB. Free memory was 339.6MB in the beginning and 328.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 11:27:13,636 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.63ms. Allocated memory is still 369.1MB. Free memory was 328.7MB in the beginning and 327.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 11:27:13,636 INFO L158 Benchmark]: Boogie Preprocessor took 12.32ms. Allocated memory is still 369.1MB. Free memory was 327.0MB in the beginning and 325.5MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-01-28 11:27:13,637 INFO L158 Benchmark]: RCFGBuilder took 287.45ms. Allocated memory is still 369.1MB. Free memory was 325.5MB in the beginning and 311.4MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-28 11:27:13,637 INFO L158 Benchmark]: TraceAbstraction took 97583.44ms. Allocated memory was 369.1MB in the beginning and 4.2GB in the end (delta: 3.9GB). Free memory was 310.9MB in the beginning and 882.2MB in the end (delta: -571.3MB). Peak memory consumption was 3.3GB. Max. memory is 16.0GB. [2023-01-28 11:27:13,637 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 255.9MB. Free memory is still 213.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 137.40ms. Allocated memory is still 369.1MB. Free memory was 339.6MB in the beginning and 328.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 23.63ms. Allocated memory is still 369.1MB. Free memory was 328.7MB in the beginning and 327.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.0GB. * Boogie Preprocessor took 12.32ms. Allocated memory is still 369.1MB. Free memory was 327.0MB in the beginning and 325.5MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * RCFGBuilder took 287.45ms. Allocated memory is still 369.1MB. Free memory was 325.5MB in the beginning and 311.4MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 97583.44ms. Allocated memory was 369.1MB in the beginning and 4.2GB in the end (delta: 3.9GB). Free memory was 310.9MB in the beginning and 882.2MB in the end (delta: -571.3MB). Peak memory consumption was 3.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 72 PlacesBefore, 20 PlacesAfterwards, 71 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 449 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 448, independent: 446, independent conditional: 0, independent unconditional: 446, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 218, independent: 216, independent conditional: 0, independent unconditional: 216, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 448, independent: 230, independent conditional: 0, independent unconditional: 230, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 218, unknown conditional: 0, unknown unconditional: 218] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 78]: 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, 93 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: 97.5s, OverallIterations: 38, TraceHistogramMax: 8, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 68.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5306 SdHoareTripleChecker+Valid, 11.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5306 mSDsluCounter, 579 SdHoareTripleChecker+Invalid, 9.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 408 mSDsCounter, 1423 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 29114 IncrementalHoareTripleChecker+Invalid, 30537 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1423 mSolverCounterUnsat, 171 mSDtfsCounter, 29114 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2465 GetRequests, 623 SyntacticMatches, 50 SemanticMatches, 1792 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31147 ImplicationChecksByTransitivity, 26.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24146occurred in iteration=36, InterpolantAutomatonStates: 1275, 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: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 17.6s InterpolantComputationTime, 1267 NumberOfCodeBlocks, 1267 NumberOfCodeBlocksAsserted, 130 NumberOfCheckSat, 1777 ConstructedInterpolants, 0 QuantifiedInterpolants, 19557 SizeOfPredicates, 219 NumberOfNonLiveVariables, 4594 ConjunctsInSsa, 931 ConjunctsInUnsatCore, 110 InterpolantComputations, 2 PerfectInterpolantSequences, 47/922 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 11:27:13,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...