/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-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 11:11:15,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 11:11:15,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 11:11:15,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 11:11:15,421 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 11:11:15,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 11:11:15,425 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 11:11:15,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 11:11:15,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 11:11:15,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 11:11:15,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 11:11:15,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 11:11:15,435 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 11:11:15,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 11:11:15,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 11:11:15,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 11:11:15,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 11:11:15,441 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 11:11:15,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 11:11:15,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 11:11:15,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 11:11:15,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 11:11:15,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 11:11:15,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 11:11:15,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 11:11:15,453 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 11:11:15,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 11:11:15,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 11:11:15,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 11:11:15,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 11:11:15,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 11:11:15,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 11:11:15,455 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 11:11:15,456 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 11:11:15,456 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 11:11:15,457 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 11:11:15,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 11:11:15,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 11:11:15,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 11:11:15,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 11:11:15,461 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 11:11:15,462 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 11:11:15,481 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 11:11:15,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 11:11:15,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 11:11:15,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 11:11:15,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 11:11:15,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 11:11:15,483 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 11:11:15,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 11:11:15,484 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 11:11:15,484 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 11:11:15,484 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 11:11:15,484 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 11:11:15,485 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 11:11:15,485 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 11:11:15,485 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 11:11:15,485 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 11:11:15,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 11:11:15,485 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 11:11:15,485 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 11:11:15,485 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 11:11:15,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 11:11:15,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 11:11:15,486 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 11:11:15,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:11:15,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 11:11:15,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 11:11:15,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 11:11:15,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 11:11:15,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 11:11:15,486 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 11:11:15,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 11:11:15,487 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 11:11:15,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 11:11:15,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 11:11:15,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 11:11:15,710 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 11:11:15,711 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 11:11:15,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-01-28 11:11:16,576 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 11:11:16,756 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 11:11:16,757 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-01-28 11:11:16,761 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400981591/82e088bb77b04d38af4121c9df9451b0/FLAG139b55a56 [2023-01-28 11:11:16,770 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400981591/82e088bb77b04d38af4121c9df9451b0 [2023-01-28 11:11:16,772 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 11:11:16,773 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 11:11:16,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 11:11:16,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 11:11:16,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 11:11:16,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,779 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d9e4794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16, skipping insertion in model container [2023-01-28 11:11:16,779 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 11:11:16,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 11:11:16,885 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-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-01-28 11:11:16,888 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:11:16,896 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 11:11:16,916 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-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-01-28 11:11:16,921 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:11:16,926 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:11:16,927 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:11:16,932 INFO L208 MainTranslator]: Completed translation [2023-01-28 11:11:16,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16 WrapperNode [2023-01-28 11:11:16,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 11:11:16,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 11:11:16,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 11:11:16,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 11:11:16,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,944 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,959 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-01-28 11:11:16,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 11:11:16,960 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 11:11:16,960 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 11:11:16,960 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 11:11:16,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,974 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,986 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 11:11:16,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 11:11:16,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 11:11:16,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 11:11:16,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (1/1) ... [2023-01-28 11:11:16,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:11:17,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:17,011 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 11:11:17,032 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 11:11:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 11:11:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 11:11:17,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 11:11:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 11:11:17,051 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 11:11:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 11:11:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 11:11:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 11:11:17,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 11:11:17,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 11:11:17,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 11:11:17,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 11:11:17,052 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 11:11:17,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 11:11:17,053 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 11:11:17,123 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 11:11:17,124 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 11:11:17,240 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 11:11:17,266 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 11:11:17,266 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 11:11:17,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:11:17 BoogieIcfgContainer [2023-01-28 11:11:17,268 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 11:11:17,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 11:11:17,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 11:11:17,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 11:11:17,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 11:11:16" (1/3) ... [2023-01-28 11:11:17,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749a15a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:11:17, skipping insertion in model container [2023-01-28 11:11:17,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:16" (2/3) ... [2023-01-28 11:11:17,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749a15a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:11:17, skipping insertion in model container [2023-01-28 11:11:17,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:11:17" (3/3) ... [2023-01-28 11:11:17,280 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-01-28 11:11:17,291 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 11:11:17,291 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 11:11:17,291 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 11:11:17,342 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 11:11:17,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 79 transitions, 174 flow [2023-01-28 11:11:17,392 INFO L130 PetriNetUnfolder]: 6/77 cut-off events. [2023-01-28 11:11:17,393 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:11:17,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 77 events. 6/77 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. 0/70 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-01-28 11:11:17,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 79 transitions, 174 flow [2023-01-28 11:11:17,398 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 69 transitions, 150 flow [2023-01-28 11:11:17,400 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 11:11:17,406 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 69 transitions, 150 flow [2023-01-28 11:11:17,408 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 69 transitions, 150 flow [2023-01-28 11:11:17,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 70 places, 69 transitions, 150 flow [2023-01-28 11:11:17,422 INFO L130 PetriNetUnfolder]: 6/69 cut-off events. [2023-01-28 11:11:17,422 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:11:17,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78 conditions, 69 events. 6/69 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 38 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-01-28 11:11:17,424 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-01-28 11:11:18,921 INFO L134 LiptonReduction]: Checked pairs total: 443 [2023-01-28 11:11:18,921 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-01-28 11:11:18,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 11:11:18,936 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;@35837277, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 11:11:18,937 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 11:11:18,940 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 11:11:18,940 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:11:18,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:18,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:18,941 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 11:11:18,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:18,953 INFO L85 PathProgramCache]: Analyzing trace with hash 715998182, now seen corresponding path program 1 times [2023-01-28 11:11:18,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:18,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707529071] [2023-01-28 11:11:18,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:18,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:19,327 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 11:11:19,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:19,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707529071] [2023-01-28 11:11:19,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707529071] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:11:19,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:11:19,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 11:11:19,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558539618] [2023-01-28 11:11:19,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:11:19,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:11:19,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:19,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:11:19,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:11:19,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 142 [2023-01-28 11:11:19,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:19,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:19,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 142 [2023-01-28 11:11:19,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:19,419 INFO L130 PetriNetUnfolder]: 59/100 cut-off events. [2023-01-28 11:11:19,419 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-01-28 11:11:19,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 240 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-01-28 11:11:19,421 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-01-28 11:11:19,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-01-28 11:11:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:11:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:11:19,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-01-28 11:11:19,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4665492957746479 [2023-01-28 11:11:19,440 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-01-28 11:11:19,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-01-28 11:11:19,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:19,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-01-28 11:11:19,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:19,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:19,448 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:19,452 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 265 transitions. [2023-01-28 11:11:19,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-01-28 11:11:19,454 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 11:11:19,455 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-01-28 11:11:19,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, 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 11:11:19,459 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-01-28 11:11:19,459 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-01-28 11:11:19,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 4 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:19,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:19,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:19,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 11:11:19,460 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 11:11:19,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1517791802, now seen corresponding path program 1 times [2023-01-28 11:11:19,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:19,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856968332] [2023-01-28 11:11:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:19,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:19,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:19,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856968332] [2023-01-28 11:11:19,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856968332] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:11:19,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:11:19,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 11:11:19,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818955366] [2023-01-28 11:11:19,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:11:19,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:11:19,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:19,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:11:19,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:11:19,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-01-28 11:11:19,587 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 11:11:19,587 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:19,587 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-01-28 11:11:19,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:19,645 INFO L130 PetriNetUnfolder]: 60/119 cut-off events. [2023-01-28 11:11:19,645 INFO L131 PetriNetUnfolder]: For 22/30 co-relation queries the response was YES. [2023-01-28 11:11:19,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293 conditions, 119 events. 60/119 cut-off events. For 22/30 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 345 event pairs, 16 based on Foata normal form. 12/102 useless extension candidates. Maximal degree in co-relation 97. Up to 74 conditions per place. [2023-01-28 11:11:19,646 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 26 selfloop transitions, 3 changer transitions 2/32 dead transitions. [2023-01-28 11:11:19,646 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 32 transitions, 155 flow [2023-01-28 11:11:19,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:11:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:11:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 266 transitions. [2023-01-28 11:11:19,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46830985915492956 [2023-01-28 11:11:19,647 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 266 transitions. [2023-01-28 11:11:19,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 266 transitions. [2023-01-28 11:11:19,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:19,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 266 transitions. [2023-01-28 11:11:19,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:19,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:19,650 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:19,650 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 266 transitions. [2023-01-28 11:11:19,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 32 transitions, 155 flow [2023-01-28 11:11:19,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 32 transitions, 146 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 11:11:19,651 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 64 flow [2023-01-28 11:11:19,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=64, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2023-01-28 11:11:19,651 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-01-28 11:11:19,651 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 64 flow [2023-01-28 11:11:19,652 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 11:11:19,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:19,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:19,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 11:11:19,652 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 11:11:19,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:19,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1749521210, now seen corresponding path program 2 times [2023-01-28 11:11:19,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:19,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892005168] [2023-01-28 11:11:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:19,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:19,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:19,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892005168] [2023-01-28 11:11:19,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892005168] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:19,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446945667] [2023-01-28 11:11:19,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:11:19,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:19,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:19,772 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 11:11:19,783 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 11:11:19,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 11:11:19,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:19,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:11:19,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:19,897 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 11:11:19,897 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 11:11:19,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446945667] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:11:19,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 11:11:19,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-01-28 11:11:19,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35949135] [2023-01-28 11:11:19,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:11:19,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:11:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:19,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:11:19,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-01-28 11:11:19,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-01-28 11:11:19,899 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 64 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 11:11:19,899 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:19,899 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-01-28 11:11:19,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:19,939 INFO L130 PetriNetUnfolder]: 51/94 cut-off events. [2023-01-28 11:11:19,939 INFO L131 PetriNetUnfolder]: For 72/80 co-relation queries the response was YES. [2023-01-28 11:11:19,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 94 events. 51/94 cut-off events. For 72/80 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 227 event pairs, 24 based on Foata normal form. 16/99 useless extension candidates. Maximal degree in co-relation 148. Up to 73 conditions per place. [2023-01-28 11:11:19,940 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-01-28 11:11:19,940 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 123 flow [2023-01-28 11:11:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:11:19,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:11:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 257 transitions. [2023-01-28 11:11:19,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524647887323944 [2023-01-28 11:11:19,941 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 257 transitions. [2023-01-28 11:11:19,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 257 transitions. [2023-01-28 11:11:19,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:19,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 257 transitions. [2023-01-28 11:11:19,942 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 11:11:19,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:19,943 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:19,943 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 64 flow. Second operand 4 states and 257 transitions. [2023-01-28 11:11:19,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 123 flow [2023-01-28 11:11:19,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 111 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-01-28 11:11:19,944 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 56 flow [2023-01-28 11:11:19,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-01-28 11:11:19,945 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-01-28 11:11:19,945 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 56 flow [2023-01-28 11:11:19,945 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 11:11:19,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:19,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:19,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 11:11:20,147 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 11:11:20,148 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 11:11:20,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:20,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1434294769, now seen corresponding path program 1 times [2023-01-28 11:11:20,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:20,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487262565] [2023-01-28 11:11:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:20,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:20,378 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 11:11:20,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:20,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487262565] [2023-01-28 11:11:20,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487262565] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:20,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323379809] [2023-01-28 11:11:20,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:20,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:20,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:20,381 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 11:11:20,384 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 11:11:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:20,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 11:11:20,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:20,498 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 11:11:20,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:20,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:20,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323379809] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:20,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 11:11:20,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 10 [2023-01-28 11:11:20,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43866348] [2023-01-28 11:11:20,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:11:20,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:11:20,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:20,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:11:20,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-01-28 11:11:20,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-01-28 11:11:20,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 56 flow. Second operand has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:20,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:20,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-01-28 11:11:20,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:20,724 INFO L130 PetriNetUnfolder]: 95/175 cut-off events. [2023-01-28 11:11:20,724 INFO L131 PetriNetUnfolder]: For 50/61 co-relation queries the response was YES. [2023-01-28 11:11:20,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 471 conditions, 175 events. 95/175 cut-off events. For 50/61 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 560 event pairs, 15 based on Foata normal form. 12/143 useless extension candidates. Maximal degree in co-relation 144. Up to 69 conditions per place. [2023-01-28 11:11:20,728 INFO L137 encePairwiseOnDemand]: 138/142 looper letters, 29 selfloop transitions, 6 changer transitions 4/40 dead transitions. [2023-01-28 11:11:20,728 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 40 transitions, 202 flow [2023-01-28 11:11:20,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:11:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:11:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 272 transitions. [2023-01-28 11:11:20,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4788732394366197 [2023-01-28 11:11:20,729 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 272 transitions. [2023-01-28 11:11:20,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 272 transitions. [2023-01-28 11:11:20,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:20,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 272 transitions. [2023-01-28 11:11:20,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:20,731 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:20,731 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:20,731 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 56 flow. Second operand 4 states and 272 transitions. [2023-01-28 11:11:20,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 40 transitions, 202 flow [2023-01-28 11:11:20,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 40 transitions, 196 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 11:11:20,733 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 94 flow [2023-01-28 11:11:20,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-01-28 11:11:20,734 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-28 11:11:20,734 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 94 flow [2023-01-28 11:11:20,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.8) internal successors, (309), 5 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:20,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:20,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:20,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 11:11:20,941 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 11:11:20,941 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 11:11:20,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:20,941 INFO L85 PathProgramCache]: Analyzing trace with hash -539686553, now seen corresponding path program 2 times [2023-01-28 11:11:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:20,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687607954] [2023-01-28 11:11:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:20,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:21,012 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 11:11:21,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:21,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687607954] [2023-01-28 11:11:21,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687607954] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:21,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196849933] [2023-01-28 11:11:21,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:11:21,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:21,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:21,014 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 11:11:21,015 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 11:11:21,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:11:21,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:21,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:11:21,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:21,104 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 11:11:21,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:21,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:21,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196849933] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:21,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:21,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 6] total 12 [2023-01-28 11:11:21,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362328476] [2023-01-28 11:11:21,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:21,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 11:11:21,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:21,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 11:11:21,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-01-28 11:11:21,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 11:11:21,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 94 flow. Second operand has 13 states, 13 states have (on average 57.46153846153846) internal successors, (747), 13 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:21,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:21,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 11:11:21,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:21,750 INFO L130 PetriNetUnfolder]: 175/307 cut-off events. [2023-01-28 11:11:21,750 INFO L131 PetriNetUnfolder]: For 266/266 co-relation queries the response was YES. [2023-01-28 11:11:21,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 307 events. 175/307 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1043 event pairs, 10 based on Foata normal form. 22/329 useless extension candidates. Maximal degree in co-relation 316. Up to 131 conditions per place. [2023-01-28 11:11:21,752 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 47 selfloop transitions, 32 changer transitions 4/83 dead transitions. [2023-01-28 11:11:21,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 83 transitions, 526 flow [2023-01-28 11:11:21,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 11:11:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 11:11:21,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 894 transitions. [2023-01-28 11:11:21,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4197183098591549 [2023-01-28 11:11:21,754 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 894 transitions. [2023-01-28 11:11:21,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 894 transitions. [2023-01-28 11:11:21,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:21,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 894 transitions. [2023-01-28 11:11:21,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 59.6) internal successors, (894), 15 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:21,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 142.0) internal successors, (2272), 16 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:21,759 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 142.0) internal successors, (2272), 16 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:21,759 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 94 flow. Second operand 15 states and 894 transitions. [2023-01-28 11:11:21,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 83 transitions, 526 flow [2023-01-28 11:11:21,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 11:11:21,764 INFO L231 Difference]: Finished difference. Result has 46 places, 48 transitions, 364 flow [2023-01-28 11:11:21,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=364, PETRI_PLACES=46, PETRI_TRANSITIONS=48} [2023-01-28 11:11:21,766 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 26 predicate places. [2023-01-28 11:11:21,766 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 48 transitions, 364 flow [2023-01-28 11:11:21,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 57.46153846153846) internal successors, (747), 13 states have internal predecessors, (747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:21,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:21,767 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:21,773 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 11:11:21,971 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 11:11:21,972 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 11:11:21,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1477368276, now seen corresponding path program 3 times [2023-01-28 11:11:21,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:21,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58929939] [2023-01-28 11:11:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:21,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:22,151 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 11:11:22,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:22,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58929939] [2023-01-28 11:11:22,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58929939] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:22,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885574607] [2023-01-28 11:11:22,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:11:22,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:22,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:22,152 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 11:11:22,154 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 11:11:22,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:11:22,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 11:11:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:22,289 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 11:11:22,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:22,407 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 11:11:22,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885574607] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:22,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:22,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-01-28 11:11:22,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895350488] [2023-01-28 11:11:22,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:22,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 11:11:22,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:22,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 11:11:22,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-01-28 11:11:22,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 11:11:22,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 48 transitions, 364 flow. Second operand has 14 states, 14 states have (on average 57.285714285714285) internal successors, (802), 14 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:22,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:22,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 11:11:22,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:22,858 INFO L130 PetriNetUnfolder]: 313/565 cut-off events. [2023-01-28 11:11:22,858 INFO L131 PetriNetUnfolder]: For 2250/2250 co-relation queries the response was YES. [2023-01-28 11:11:22,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 565 events. 313/565 cut-off events. For 2250/2250 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2400 event pairs, 13 based on Foata normal form. 22/587 useless extension candidates. Maximal degree in co-relation 2022. Up to 183 conditions per place. [2023-01-28 11:11:22,861 INFO L137 encePairwiseOnDemand]: 136/142 looper letters, 93 selfloop transitions, 47 changer transitions 13/153 dead transitions. [2023-01-28 11:11:22,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 153 transitions, 1332 flow [2023-01-28 11:11:22,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 11:11:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 11:11:22,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 980 transitions. [2023-01-28 11:11:22,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43133802816901406 [2023-01-28 11:11:22,864 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 980 transitions. [2023-01-28 11:11:22,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 980 transitions. [2023-01-28 11:11:22,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:22,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 980 transitions. [2023-01-28 11:11:22,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 61.25) internal successors, (980), 16 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:22,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:22,869 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 142.0) internal successors, (2414), 17 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:22,869 INFO L175 Difference]: Start difference. First operand has 46 places, 48 transitions, 364 flow. Second operand 16 states and 980 transitions. [2023-01-28 11:11:22,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 153 transitions, 1332 flow [2023-01-28 11:11:22,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 153 transitions, 1273 flow, removed 26 selfloop flow, removed 2 redundant places. [2023-01-28 11:11:22,875 INFO L231 Difference]: Finished difference. Result has 63 places, 77 transitions, 741 flow [2023-01-28 11:11:22,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=741, PETRI_PLACES=63, PETRI_TRANSITIONS=77} [2023-01-28 11:11:22,875 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-01-28 11:11:22,876 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 77 transitions, 741 flow [2023-01-28 11:11:22,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 57.285714285714285) internal successors, (802), 14 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:22,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:22,876 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:22,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 11:11:23,081 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 11:11:23,081 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 11:11:23,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:23,082 INFO L85 PathProgramCache]: Analyzing trace with hash -2047268056, now seen corresponding path program 4 times [2023-01-28 11:11:23,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:23,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282723696] [2023-01-28 11:11:23,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:23,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:23,220 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 11:11:23,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:23,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282723696] [2023-01-28 11:11:23,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282723696] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:23,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824383880] [2023-01-28 11:11:23,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:11:23,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:23,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:23,222 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 11:11:23,224 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 11:11:23,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:11:23,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:23,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 11:11:23,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:23,356 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 11:11:23,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:23,472 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 11:11:23,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824383880] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:23,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:23,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 11:11:23,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044947071] [2023-01-28 11:11:23,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:23,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 11:11:23,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:23,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 11:11:23,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-01-28 11:11:23,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 11:11:23,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 77 transitions, 741 flow. Second operand has 16 states, 16 states have (on average 57.125) internal successors, (914), 16 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:23,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:23,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 11:11:23,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:23,937 INFO L130 PetriNetUnfolder]: 372/680 cut-off events. [2023-01-28 11:11:23,937 INFO L131 PetriNetUnfolder]: For 6308/6308 co-relation queries the response was YES. [2023-01-28 11:11:23,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 680 events. 372/680 cut-off events. For 6308/6308 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3114 event pairs, 24 based on Foata normal form. 38/718 useless extension candidates. Maximal degree in co-relation 3026. Up to 239 conditions per place. [2023-01-28 11:11:23,942 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 118 selfloop transitions, 54 changer transitions 11/183 dead transitions. [2023-01-28 11:11:23,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 183 transitions, 1855 flow [2023-01-28 11:11:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 11:11:23,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 11:11:23,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1169 transitions. [2023-01-28 11:11:23,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332839140103781 [2023-01-28 11:11:23,945 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1169 transitions. [2023-01-28 11:11:23,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1169 transitions. [2023-01-28 11:11:23,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:23,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1169 transitions. [2023-01-28 11:11:23,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.526315789473685) internal successors, (1169), 19 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:23,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:23,950 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 142.0) internal successors, (2840), 20 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:23,950 INFO L175 Difference]: Start difference. First operand has 63 places, 77 transitions, 741 flow. Second operand 19 states and 1169 transitions. [2023-01-28 11:11:23,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 183 transitions, 1855 flow [2023-01-28 11:11:23,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 183 transitions, 1690 flow, removed 75 selfloop flow, removed 5 redundant places. [2023-01-28 11:11:23,962 INFO L231 Difference]: Finished difference. Result has 83 places, 101 transitions, 1127 flow [2023-01-28 11:11:23,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1127, PETRI_PLACES=83, PETRI_TRANSITIONS=101} [2023-01-28 11:11:23,963 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-01-28 11:11:23,963 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 101 transitions, 1127 flow [2023-01-28 11:11:23,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.125) internal successors, (914), 16 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:23,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:23,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:23,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 11:11:24,171 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 11:11:24,171 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 11:11:24,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:24,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1082077996, now seen corresponding path program 5 times [2023-01-28 11:11:24,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:24,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170246813] [2023-01-28 11:11:24,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:24,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:24,309 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 11:11:24,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:24,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170246813] [2023-01-28 11:11:24,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170246813] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:24,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876785421] [2023-01-28 11:11:24,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:11:24,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:24,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:24,311 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 11:11:24,313 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 11:11:24,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:11:24,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:11:24,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:24,433 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 11:11:24,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:24,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876785421] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:24,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:24,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 11:11:24,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135289380] [2023-01-28 11:11:24,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:24,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 11:11:24,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:24,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 11:11:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-01-28 11:11:24,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-01-28 11:11:24,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 101 transitions, 1127 flow. Second operand has 16 states, 16 states have (on average 60.0625) internal successors, (961), 16 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:24,735 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:24,735 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-01-28 11:11:24,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:25,804 INFO L130 PetriNetUnfolder]: 537/1037 cut-off events. [2023-01-28 11:11:25,804 INFO L131 PetriNetUnfolder]: For 18920/18920 co-relation queries the response was YES. [2023-01-28 11:11:25,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6850 conditions, 1037 events. 537/1037 cut-off events. For 18920/18920 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5562 event pairs, 29 based on Foata normal form. 24/1061 useless extension candidates. Maximal degree in co-relation 5560. Up to 355 conditions per place. [2023-01-28 11:11:25,811 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 143 selfloop transitions, 105 changer transitions 33/281 dead transitions. [2023-01-28 11:11:25,811 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 281 transitions, 3057 flow [2023-01-28 11:11:25,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 11:11:25,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 11:11:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1937 transitions. [2023-01-28 11:11:25,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546948356807512 [2023-01-28 11:11:25,815 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1937 transitions. [2023-01-28 11:11:25,815 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1937 transitions. [2023-01-28 11:11:25,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:25,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1937 transitions. [2023-01-28 11:11:25,819 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 64.56666666666666) internal successors, (1937), 30 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:25,822 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:25,823 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 142.0) internal successors, (4402), 31 states have internal predecessors, (4402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:25,823 INFO L175 Difference]: Start difference. First operand has 83 places, 101 transitions, 1127 flow. Second operand 30 states and 1937 transitions. [2023-01-28 11:11:25,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 281 transitions, 3057 flow [2023-01-28 11:11:25,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 281 transitions, 2806 flow, removed 119 selfloop flow, removed 3 redundant places. [2023-01-28 11:11:25,889 INFO L231 Difference]: Finished difference. Result has 124 places, 141 transitions, 1769 flow [2023-01-28 11:11:25,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1769, PETRI_PLACES=124, PETRI_TRANSITIONS=141} [2023-01-28 11:11:25,890 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 104 predicate places. [2023-01-28 11:11:25,890 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 141 transitions, 1769 flow [2023-01-28 11:11:25,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 60.0625) internal successors, (961), 16 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:25,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:25,890 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:25,912 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 11:11:26,095 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 11:11:26,095 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 11:11:26,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:26,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1580942134, now seen corresponding path program 6 times [2023-01-28 11:11:26,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:26,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490635242] [2023-01-28 11:11:26,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:26,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:26,242 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 11:11:26,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:26,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490635242] [2023-01-28 11:11:26,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490635242] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:26,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916495406] [2023-01-28 11:11:26,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:11:26,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:26,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:26,244 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 11:11:26,245 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 11:11:26,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 11:11:26,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:26,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:11:26,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:26,357 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 11:11:26,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:26,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916495406] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:26,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:26,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-01-28 11:11:26,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106816390] [2023-01-28 11:11:26,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:26,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 11:11:26,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 11:11:26,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-01-28 11:11:26,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-01-28 11:11:26,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 141 transitions, 1769 flow. Second operand has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:26,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:26,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-01-28 11:11:26,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:27,321 INFO L130 PetriNetUnfolder]: 626/1220 cut-off events. [2023-01-28 11:11:27,322 INFO L131 PetriNetUnfolder]: For 29888/29888 co-relation queries the response was YES. [2023-01-28 11:11:27,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9038 conditions, 1220 events. 626/1220 cut-off events. For 29888/29888 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6893 event pairs, 103 based on Foata normal form. 40/1260 useless extension candidates. Maximal degree in co-relation 8284. Up to 443 conditions per place. [2023-01-28 11:11:27,331 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 114 selfloop transitions, 119 changer transitions 6/239 dead transitions. [2023-01-28 11:11:27,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 239 transitions, 3353 flow [2023-01-28 11:11:27,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 11:11:27,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 11:11:27,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1085 transitions. [2023-01-28 11:11:27,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494614747307374 [2023-01-28 11:11:27,334 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1085 transitions. [2023-01-28 11:11:27,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1085 transitions. [2023-01-28 11:11:27,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:27,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1085 transitions. [2023-01-28 11:11:27,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 63.8235294117647) internal successors, (1085), 17 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:27,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:27,338 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 142.0) internal successors, (2556), 18 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:27,338 INFO L175 Difference]: Start difference. First operand has 124 places, 141 transitions, 1769 flow. Second operand 17 states and 1085 transitions. [2023-01-28 11:11:27,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 239 transitions, 3353 flow [2023-01-28 11:11:27,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 239 transitions, 3099 flow, removed 97 selfloop flow, removed 13 redundant places. [2023-01-28 11:11:27,379 INFO L231 Difference]: Finished difference. Result has 133 places, 186 transitions, 2784 flow [2023-01-28 11:11:27,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2784, PETRI_PLACES=133, PETRI_TRANSITIONS=186} [2023-01-28 11:11:27,380 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 113 predicate places. [2023-01-28 11:11:27,380 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 186 transitions, 2784 flow [2023-01-28 11:11:27,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.285714285714285) internal successors, (844), 14 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:27,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:27,380 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:27,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 11:11:27,586 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 11:11:27,587 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 11:11:27,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:27,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1860953658, now seen corresponding path program 7 times [2023-01-28 11:11:27,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:27,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154735515] [2023-01-28 11:11:27,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:27,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:27,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:27,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:27,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154735515] [2023-01-28 11:11:27,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154735515] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:27,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512386099] [2023-01-28 11:11:27,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:11:27,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:27,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:27,686 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 11:11:27,688 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 11:11:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 11:11:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:27,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:27,896 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 11:11:27,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512386099] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:27,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:27,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 11:11:27,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412174881] [2023-01-28 11:11:27,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:27,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 11:11:27,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:27,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 11:11:27,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-01-28 11:11:27,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 11:11:27,898 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 186 transitions, 2784 flow. Second operand has 15 states, 15 states have (on average 57.06666666666667) internal successors, (856), 15 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:27,898 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:27,898 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 11:11:27,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:28,610 INFO L130 PetriNetUnfolder]: 810/1574 cut-off events. [2023-01-28 11:11:28,610 INFO L131 PetriNetUnfolder]: For 42907/42907 co-relation queries the response was YES. [2023-01-28 11:11:28,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12757 conditions, 1574 events. 810/1574 cut-off events. For 42907/42907 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9502 event pairs, 98 based on Foata normal form. 52/1626 useless extension candidates. Maximal degree in co-relation 11619. Up to 1051 conditions per place. [2023-01-28 11:11:28,622 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 213 selfloop transitions, 130 changer transitions 6/349 dead transitions. [2023-01-28 11:11:28,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 349 transitions, 5476 flow [2023-01-28 11:11:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 11:11:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 11:11:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1412 transitions. [2023-01-28 11:11:28,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43233312921004285 [2023-01-28 11:11:28,625 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1412 transitions. [2023-01-28 11:11:28,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1412 transitions. [2023-01-28 11:11:28,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:28,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1412 transitions. [2023-01-28 11:11:28,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 61.391304347826086) internal successors, (1412), 23 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:28,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:28,631 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:28,631 INFO L175 Difference]: Start difference. First operand has 133 places, 186 transitions, 2784 flow. Second operand 23 states and 1412 transitions. [2023-01-28 11:11:28,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 349 transitions, 5476 flow [2023-01-28 11:11:28,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 349 transitions, 5026 flow, removed 215 selfloop flow, removed 4 redundant places. [2023-01-28 11:11:28,732 INFO L231 Difference]: Finished difference. Result has 165 places, 256 transitions, 4217 flow [2023-01-28 11:11:28,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=2511, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4217, PETRI_PLACES=165, PETRI_TRANSITIONS=256} [2023-01-28 11:11:28,733 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2023-01-28 11:11:28,733 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 256 transitions, 4217 flow [2023-01-28 11:11:28,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.06666666666667) internal successors, (856), 15 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:28,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:28,734 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:28,741 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 11:11:28,938 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 11:11:28,938 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 11:11:28,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:28,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1468102828, now seen corresponding path program 8 times [2023-01-28 11:11:28,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:28,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143026123] [2023-01-28 11:11:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:28,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:29,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:29,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:29,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143026123] [2023-01-28 11:11:29,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143026123] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:29,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022048205] [2023-01-28 11:11:29,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:11:29,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:29,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:29,067 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 11:11:29,087 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 11:11:29,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:11:29,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:11:29,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:29,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:29,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022048205] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:29,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:29,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 11:11:29,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960140352] [2023-01-28 11:11:29,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:29,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 11:11:29,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:29,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 11:11:29,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-01-28 11:11:29,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-01-28 11:11:29,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 256 transitions, 4217 flow. Second operand has 15 states, 15 states have (on average 59.733333333333334) internal successors, (896), 15 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:29,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:29,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-01-28 11:11:29,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:30,816 INFO L130 PetriNetUnfolder]: 998/1958 cut-off events. [2023-01-28 11:11:30,816 INFO L131 PetriNetUnfolder]: For 73427/73427 co-relation queries the response was YES. [2023-01-28 11:11:30,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17101 conditions, 1958 events. 998/1958 cut-off events. For 73427/73427 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 12509 event pairs, 168 based on Foata normal form. 24/1982 useless extension candidates. Maximal degree in co-relation 14924. Up to 886 conditions per place. [2023-01-28 11:11:30,836 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 209 selfloop transitions, 183 changer transitions 5/397 dead transitions. [2023-01-28 11:11:30,836 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 397 transitions, 7052 flow [2023-01-28 11:11:30,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 11:11:30,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 11:11:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1415 transitions. [2023-01-28 11:11:30,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529449423815621 [2023-01-28 11:11:30,838 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1415 transitions. [2023-01-28 11:11:30,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1415 transitions. [2023-01-28 11:11:30,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:30,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1415 transitions. [2023-01-28 11:11:30,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.31818181818181) internal successors, (1415), 22 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 11:11:30,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:30,843 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 142.0) internal successors, (3266), 23 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:30,843 INFO L175 Difference]: Start difference. First operand has 165 places, 256 transitions, 4217 flow. Second operand 22 states and 1415 transitions. [2023-01-28 11:11:30,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 397 transitions, 7052 flow [2023-01-28 11:11:31,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 397 transitions, 6218 flow, removed 399 selfloop flow, removed 5 redundant places. [2023-01-28 11:11:31,039 INFO L231 Difference]: Finished difference. Result has 191 places, 307 transitions, 5255 flow [2023-01-28 11:11:31,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5255, PETRI_PLACES=191, PETRI_TRANSITIONS=307} [2023-01-28 11:11:31,040 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 171 predicate places. [2023-01-28 11:11:31,040 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 307 transitions, 5255 flow [2023-01-28 11:11:31,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 59.733333333333334) internal successors, (896), 15 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:31,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:31,041 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:31,045 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 11:11:31,241 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 11:11:31,241 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 11:11:31,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash 265383622, now seen corresponding path program 9 times [2023-01-28 11:11:31,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:31,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329163563] [2023-01-28 11:11:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:31,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:31,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:31,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:31,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329163563] [2023-01-28 11:11:31,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329163563] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:31,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473383098] [2023-01-28 11:11:31,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:11:31,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:31,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:31,454 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 11:11:31,455 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 11:11:31,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:11:31,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:31,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 11:11:31,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:31,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:11:31,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473383098] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:31,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:31,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 4] total 14 [2023-01-28 11:11:31,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810846512] [2023-01-28 11:11:31,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:31,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 11:11:31,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:31,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 11:11:31,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-01-28 11:11:31,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 142 [2023-01-28 11:11:31,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 307 transitions, 5255 flow. Second operand has 16 states, 16 states have (on average 53.5625) internal successors, (857), 16 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:31,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:31,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 142 [2023-01-28 11:11:31,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:32,413 INFO L130 PetriNetUnfolder]: 1317/2580 cut-off events. [2023-01-28 11:11:32,413 INFO L131 PetriNetUnfolder]: For 103291/103291 co-relation queries the response was YES. [2023-01-28 11:11:32,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23861 conditions, 2580 events. 1317/2580 cut-off events. For 103291/103291 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 17575 event pairs, 144 based on Foata normal form. 13/2593 useless extension candidates. Maximal degree in co-relation 22833. Up to 1044 conditions per place. [2023-01-28 11:11:32,436 INFO L137 encePairwiseOnDemand]: 137/142 looper letters, 248 selfloop transitions, 132 changer transitions 88/471 dead transitions. [2023-01-28 11:11:32,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 471 transitions, 9157 flow [2023-01-28 11:11:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 11:11:32,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 11:11:32,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 646 transitions. [2023-01-28 11:11:32,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41357234314980795 [2023-01-28 11:11:32,437 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 646 transitions. [2023-01-28 11:11:32,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 646 transitions. [2023-01-28 11:11:32,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:32,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 646 transitions. [2023-01-28 11:11:32,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.72727272727273) internal successors, (646), 11 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:32,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:32,440 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 142.0) internal successors, (1704), 12 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:32,440 INFO L175 Difference]: Start difference. First operand has 191 places, 307 transitions, 5255 flow. Second operand 11 states and 646 transitions. [2023-01-28 11:11:32,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 471 transitions, 9157 flow [2023-01-28 11:11:32,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 471 transitions, 8904 flow, removed 92 selfloop flow, removed 4 redundant places. [2023-01-28 11:11:32,703 INFO L231 Difference]: Finished difference. Result has 203 places, 330 transitions, 6244 flow [2023-01-28 11:11:32,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5060, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6244, PETRI_PLACES=203, PETRI_TRANSITIONS=330} [2023-01-28 11:11:32,703 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 183 predicate places. [2023-01-28 11:11:32,703 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 330 transitions, 6244 flow [2023-01-28 11:11:32,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 53.5625) internal successors, (857), 16 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:32,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:32,704 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:32,708 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 11:11:32,904 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 11:11:32,904 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 11:11:32,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash -27278176, now seen corresponding path program 10 times [2023-01-28 11:11:32,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:32,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240105182] [2023-01-28 11:11:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:32,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:33,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:33,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240105182] [2023-01-28 11:11:33,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240105182] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:33,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704170499] [2023-01-28 11:11:33,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:11:33,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:33,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:33,118 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 11:11:33,120 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 11:11:33,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:11:33,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:33,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 11:11:33,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:11:33,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:11:33,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704170499] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:33,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:33,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 14 [2023-01-28 11:11:33,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725181999] [2023-01-28 11:11:33,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:33,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 11:11:33,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:33,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 11:11:33,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-01-28 11:11:33,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 11:11:33,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 330 transitions, 6244 flow. Second operand has 15 states, 15 states have (on average 55.266666666666666) internal successors, (829), 15 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:33,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:33,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 11:11:33,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:34,544 INFO L130 PetriNetUnfolder]: 1163/2353 cut-off events. [2023-01-28 11:11:34,544 INFO L131 PetriNetUnfolder]: For 125038/125038 co-relation queries the response was YES. [2023-01-28 11:11:34,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22748 conditions, 2353 events. 1163/2353 cut-off events. For 125038/125038 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 16153 event pairs, 98 based on Foata normal form. 62/2415 useless extension candidates. Maximal degree in co-relation 21468. Up to 972 conditions per place. [2023-01-28 11:11:34,564 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 274 selfloop transitions, 154 changer transitions 48/476 dead transitions. [2023-01-28 11:11:34,564 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 476 transitions, 9738 flow [2023-01-28 11:11:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 11:11:34,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 11:11:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1906 transitions. [2023-01-28 11:11:34,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067434912505335 [2023-01-28 11:11:34,566 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1906 transitions. [2023-01-28 11:11:34,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1906 transitions. [2023-01-28 11:11:34,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:34,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1906 transitions. [2023-01-28 11:11:34,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.75757575757576) internal successors, (1906), 33 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:34,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:34,572 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:34,572 INFO L175 Difference]: Start difference. First operand has 203 places, 330 transitions, 6244 flow. Second operand 33 states and 1906 transitions. [2023-01-28 11:11:34,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 476 transitions, 9738 flow [2023-01-28 11:11:34,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 476 transitions, 9256 flow, removed 217 selfloop flow, removed 3 redundant places. [2023-01-28 11:11:34,838 INFO L231 Difference]: Finished difference. Result has 243 places, 357 transitions, 7078 flow [2023-01-28 11:11:34,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=5897, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7078, PETRI_PLACES=243, PETRI_TRANSITIONS=357} [2023-01-28 11:11:34,839 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 223 predicate places. [2023-01-28 11:11:34,839 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 357 transitions, 7078 flow [2023-01-28 11:11:34,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 55.266666666666666) internal successors, (829), 15 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:34,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:34,840 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:34,851 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 11:11:35,045 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 11:11:35,045 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 11:11:35,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:35,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1060710988, now seen corresponding path program 11 times [2023-01-28 11:11:35,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:35,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834981420] [2023-01-28 11:11:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:35,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:35,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:35,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834981420] [2023-01-28 11:11:35,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834981420] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:35,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793366864] [2023-01-28 11:11:35,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:11:35,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:35,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:35,181 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 11:11:35,183 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 11:11:35,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:11:35,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:35,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 11:11:35,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:11:35,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:12:00,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793366864] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:00,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:00,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 17 [2023-01-28 11:12:00,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138686235] [2023-01-28 11:12:00,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:00,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 11:12:00,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:00,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 11:12:00,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-01-28 11:12:00,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 11:12:00,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 357 transitions, 7078 flow. Second operand has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:00,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:00,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 11:12:00,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:07,521 WARN L222 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:12:09,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:12:11,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:12:14,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:12:19,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:12:22,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:12:28,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:12:29,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:12:31,990 INFO L130 PetriNetUnfolder]: 1402/2829 cut-off events. [2023-01-28 11:12:31,991 INFO L131 PetriNetUnfolder]: For 155081/155081 co-relation queries the response was YES. [2023-01-28 11:12:32,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28110 conditions, 2829 events. 1402/2829 cut-off events. For 155081/155081 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 20069 event pairs, 36 based on Foata normal form. 54/2883 useless extension candidates. Maximal degree in co-relation 27522. Up to 737 conditions per place. [2023-01-28 11:12:32,022 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 224 selfloop transitions, 336 changer transitions 5/565 dead transitions. [2023-01-28 11:12:32,022 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 565 transitions, 12318 flow [2023-01-28 11:12:32,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 11:12:32,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 11:12:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1576 transitions. [2023-01-28 11:12:32,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110589462702139 [2023-01-28 11:12:32,026 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1576 transitions. [2023-01-28 11:12:32,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1576 transitions. [2023-01-28 11:12:32,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:32,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1576 transitions. [2023-01-28 11:12:32,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 58.370370370370374) internal successors, (1576), 27 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:32,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:32,031 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:32,031 INFO L175 Difference]: Start difference. First operand has 243 places, 357 transitions, 7078 flow. Second operand 27 states and 1576 transitions. [2023-01-28 11:12:32,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 565 transitions, 12318 flow [2023-01-28 11:12:32,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 565 transitions, 11526 flow, removed 259 selfloop flow, removed 14 redundant places. [2023-01-28 11:12:32,439 INFO L231 Difference]: Finished difference. Result has 261 places, 481 transitions, 11058 flow [2023-01-28 11:12:32,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=6557, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11058, PETRI_PLACES=261, PETRI_TRANSITIONS=481} [2023-01-28 11:12:32,439 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 241 predicate places. [2023-01-28 11:12:32,439 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 481 transitions, 11058 flow [2023-01-28 11:12:32,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.888888888888886) internal successors, (988), 18 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:32,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:32,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:12:32,445 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 11:12:32,645 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 11:12:32,645 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 11:12:32,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:32,645 INFO L85 PathProgramCache]: Analyzing trace with hash 881546728, now seen corresponding path program 12 times [2023-01-28 11:12:32,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:32,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876636315] [2023-01-28 11:12:32,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:32,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:12:32,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:32,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876636315] [2023-01-28 11:12:32,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876636315] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:32,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618605783] [2023-01-28 11:12:32,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:12:32,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:32,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:32,794 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 11:12:32,796 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 11:12:32,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:12:32,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:32,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 11:12:32,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:12:32,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:12:56,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618605783] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:56,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:56,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-28 11:12:56,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198341969] [2023-01-28 11:12:56,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:56,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 11:12:56,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:56,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 11:12:56,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-01-28 11:12:56,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 142 [2023-01-28 11:12:56,068 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 481 transitions, 11058 flow. Second operand has 18 states, 18 states have (on average 56.94444444444444) internal successors, (1025), 18 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:56,068 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:56,068 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 142 [2023-01-28 11:12:56,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:00,656 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:13:03,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:13:05,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:13:08,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:13:14,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:13:17,073 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:13:18,271 INFO L130 PetriNetUnfolder]: 2175/4302 cut-off events. [2023-01-28 11:13:18,271 INFO L131 PetriNetUnfolder]: For 238213/238213 co-relation queries the response was YES. [2023-01-28 11:13:18,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48386 conditions, 4302 events. 2175/4302 cut-off events. For 238213/238213 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 32131 event pairs, 44 based on Foata normal form. 62/4364 useless extension candidates. Maximal degree in co-relation 47384. Up to 1343 conditions per place. [2023-01-28 11:13:18,314 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 272 selfloop transitions, 577 changer transitions 11/860 dead transitions. [2023-01-28 11:13:18,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 860 transitions, 22451 flow [2023-01-28 11:13:18,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 11:13:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 11:13:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1404 transitions. [2023-01-28 11:13:18,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42988364972443355 [2023-01-28 11:13:18,316 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1404 transitions. [2023-01-28 11:13:18,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1404 transitions. [2023-01-28 11:13:18,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:18,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1404 transitions. [2023-01-28 11:13:18,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 61.04347826086956) internal successors, (1404), 23 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:18,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:18,320 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 142.0) internal successors, (3408), 24 states have internal predecessors, (3408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:18,320 INFO L175 Difference]: Start difference. First operand has 261 places, 481 transitions, 11058 flow. Second operand 23 states and 1404 transitions. [2023-01-28 11:13:18,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 860 transitions, 22451 flow [2023-01-28 11:13:19,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 860 transitions, 19722 flow, removed 1305 selfloop flow, removed 20 redundant places. [2023-01-28 11:13:19,440 INFO L231 Difference]: Finished difference. Result has 275 places, 766 transitions, 19090 flow [2023-01-28 11:13:19,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=9654, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=19090, PETRI_PLACES=275, PETRI_TRANSITIONS=766} [2023-01-28 11:13:19,440 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 255 predicate places. [2023-01-28 11:13:19,441 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 766 transitions, 19090 flow [2023-01-28 11:13:19,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.94444444444444) internal successors, (1025), 18 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:19,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:19,441 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:13:19,445 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 11:13:19,641 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 11:13:19,641 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 11:13:19,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:19,642 INFO L85 PathProgramCache]: Analyzing trace with hash -2093573005, now seen corresponding path program 13 times [2023-01-28 11:13:19,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:19,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662931324] [2023-01-28 11:13:19,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:19,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:19,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:19,907 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 11:13:19,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:19,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662931324] [2023-01-28 11:13:19,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662931324] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:19,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433200406] [2023-01-28 11:13:19,908 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:13:19,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:19,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:19,909 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 11:13:19,962 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 11:13:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 11:13:20,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:20,227 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 11:13:20,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:20,448 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 11:13:20,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433200406] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:20,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:20,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-01-28 11:13:20,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403783590] [2023-01-28 11:13:20,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:20,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 11:13:20,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:20,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 11:13:20,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2023-01-28 11:13:20,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 11:13:20,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 766 transitions, 19090 flow. Second operand has 24 states, 24 states have (on average 55.083333333333336) internal successors, (1322), 24 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:20,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:20,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 11:13:20,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:23,675 INFO L130 PetriNetUnfolder]: 3626/7246 cut-off events. [2023-01-28 11:13:23,676 INFO L131 PetriNetUnfolder]: For 305264/305264 co-relation queries the response was YES. [2023-01-28 11:13:23,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80136 conditions, 7246 events. 3626/7246 cut-off events. For 305264/305264 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 60089 event pairs, 378 based on Foata normal form. 72/7318 useless extension candidates. Maximal degree in co-relation 78334. Up to 3260 conditions per place. [2023-01-28 11:13:23,750 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 1094 selfloop transitions, 384 changer transitions 30/1508 dead transitions. [2023-01-28 11:13:23,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1508 transitions, 39732 flow [2023-01-28 11:13:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 11:13:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 11:13:23,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2017 transitions. [2023-01-28 11:13:23,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41777133388566695 [2023-01-28 11:13:23,754 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2017 transitions. [2023-01-28 11:13:23,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2017 transitions. [2023-01-28 11:13:23,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:23,755 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2017 transitions. [2023-01-28 11:13:23,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 59.3235294117647) internal successors, (2017), 34 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:23,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 142.0) internal successors, (4970), 35 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:23,761 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 142.0) internal successors, (4970), 35 states have internal predecessors, (4970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:23,761 INFO L175 Difference]: Start difference. First operand has 275 places, 766 transitions, 19090 flow. Second operand 34 states and 2017 transitions. [2023-01-28 11:13:23,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1508 transitions, 39732 flow [2023-01-28 11:13:26,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1508 transitions, 36373 flow, removed 1416 selfloop flow, removed 13 redundant places. [2023-01-28 11:13:26,560 INFO L231 Difference]: Finished difference. Result has 311 places, 1009 transitions, 24737 flow [2023-01-28 11:13:26,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=17266, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=766, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=24737, PETRI_PLACES=311, PETRI_TRANSITIONS=1009} [2023-01-28 11:13:26,561 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 291 predicate places. [2023-01-28 11:13:26,561 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 1009 transitions, 24737 flow [2023-01-28 11:13:26,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 55.083333333333336) internal successors, (1322), 24 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:26,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:26,562 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:13:26,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-01-28 11:13:26,766 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 11:13:26,766 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 11:13:26,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:26,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1427321081, now seen corresponding path program 14 times [2023-01-28 11:13:26,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:26,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023322669] [2023-01-28 11:13:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:26,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:26,944 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 11:13:26,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:26,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023322669] [2023-01-28 11:13:26,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023322669] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:26,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131292739] [2023-01-28 11:13:26,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:13:26,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:26,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:26,945 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 11:13:26,947 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 11:13:27,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:13:27,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:27,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 11:13:27,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:27,193 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 11:13:27,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:27,398 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 11:13:27,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131292739] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:27,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:27,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-01-28 11:13:27,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16806020] [2023-01-28 11:13:27,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:27,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 11:13:27,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:27,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 11:13:27,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2023-01-28 11:13:27,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 11:13:27,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 1009 transitions, 24737 flow. Second operand has 21 states, 21 states have (on average 54.80952380952381) internal successors, (1151), 21 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:27,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:27,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 11:13:27,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:31,130 INFO L130 PetriNetUnfolder]: 3800/7544 cut-off events. [2023-01-28 11:13:31,130 INFO L131 PetriNetUnfolder]: For 336751/336751 co-relation queries the response was YES. [2023-01-28 11:13:31,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82365 conditions, 7544 events. 3800/7544 cut-off events. For 336751/336751 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 62746 event pairs, 431 based on Foata normal form. 102/7646 useless extension candidates. Maximal degree in co-relation 81122. Up to 3321 conditions per place. [2023-01-28 11:13:31,211 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1154 selfloop transitions, 395 changer transitions 14/1563 dead transitions. [2023-01-28 11:13:31,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1563 transitions, 40199 flow [2023-01-28 11:13:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 11:13:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 11:13:31,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1953 transitions. [2023-01-28 11:13:31,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4167733674775928 [2023-01-28 11:13:31,213 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1953 transitions. [2023-01-28 11:13:31,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1953 transitions. [2023-01-28 11:13:31,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:31,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1953 transitions. [2023-01-28 11:13:31,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 59.18181818181818) internal successors, (1953), 33 states have internal predecessors, (1953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:31,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:31,219 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:31,219 INFO L175 Difference]: Start difference. First operand has 311 places, 1009 transitions, 24737 flow. Second operand 33 states and 1953 transitions. [2023-01-28 11:13:31,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1563 transitions, 40199 flow [2023-01-28 11:13:34,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1563 transitions, 38936 flow, removed 586 selfloop flow, removed 8 redundant places. [2023-01-28 11:13:34,429 INFO L231 Difference]: Finished difference. Result has 345 places, 1081 transitions, 26879 flow [2023-01-28 11:13:34,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=23610, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1005, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=26879, PETRI_PLACES=345, PETRI_TRANSITIONS=1081} [2023-01-28 11:13:34,430 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 325 predicate places. [2023-01-28 11:13:34,430 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1081 transitions, 26879 flow [2023-01-28 11:13:34,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.80952380952381) internal successors, (1151), 21 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:34,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:34,430 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:13:34,435 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 11:13:34,630 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 11:13:34,631 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 11:13:34,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:34,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1409095033, now seen corresponding path program 15 times [2023-01-28 11:13:34,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:34,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614029094] [2023-01-28 11:13:34,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:34,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:34,850 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 11:13:34,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:34,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614029094] [2023-01-28 11:13:34,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614029094] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:34,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145072439] [2023-01-28 11:13:34,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:13:34,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:34,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:34,851 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 11:13:34,853 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 11:13:34,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 11:13:34,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:34,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 11:13:34,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:35,097 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 11:13:35,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:13:35,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145072439] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:35,467 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:35,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-01-28 11:13:35,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330410914] [2023-01-28 11:13:35,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:35,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 11:13:35,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:35,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 11:13:35,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-01-28 11:13:35,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 11:13:35,470 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1081 transitions, 26879 flow. Second operand has 21 states, 21 states have (on average 54.857142857142854) internal successors, (1152), 21 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:35,470 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:35,470 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 11:13:35,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:41,117 INFO L130 PetriNetUnfolder]: 4812/9790 cut-off events. [2023-01-28 11:13:41,118 INFO L131 PetriNetUnfolder]: For 537502/537502 co-relation queries the response was YES. [2023-01-28 11:13:41,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111574 conditions, 9790 events. 4812/9790 cut-off events. For 537502/537502 co-relation queries the response was YES. Maximal size of possible extension queue 784. Compared 87343 event pairs, 97 based on Foata normal form. 66/9856 useless extension candidates. Maximal degree in co-relation 109686. Up to 2199 conditions per place. [2023-01-28 11:13:41,346 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 853 selfloop transitions, 1139 changer transitions 20/2012 dead transitions. [2023-01-28 11:13:41,347 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2012 transitions, 53351 flow [2023-01-28 11:13:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-28 11:13:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-28 11:13:41,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2698 transitions. [2023-01-28 11:13:41,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2023-01-28 11:13:41,349 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2698 transitions. [2023-01-28 11:13:41,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2698 transitions. [2023-01-28 11:13:41,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:41,350 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2698 transitions. [2023-01-28 11:13:41,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 59.955555555555556) internal successors, (2698), 45 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:41,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 142.0) internal successors, (6532), 46 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:41,357 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 142.0) internal successors, (6532), 46 states have internal predecessors, (6532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:41,357 INFO L175 Difference]: Start difference. First operand has 345 places, 1081 transitions, 26879 flow. Second operand 45 states and 2698 transitions. [2023-01-28 11:13:41,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2012 transitions, 53351 flow [2023-01-28 11:13:46,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 2012 transitions, 52275 flow, removed 446 selfloop flow, removed 9 redundant places. [2023-01-28 11:13:46,727 INFO L231 Difference]: Finished difference. Result has 396 places, 1532 transitions, 43046 flow [2023-01-28 11:13:46,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=26008, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1081, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=721, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=43046, PETRI_PLACES=396, PETRI_TRANSITIONS=1532} [2023-01-28 11:13:46,728 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 376 predicate places. [2023-01-28 11:13:46,728 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 1532 transitions, 43046 flow [2023-01-28 11:13:46,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.857142857142854) internal successors, (1152), 21 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:46,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:46,728 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:13:46,732 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 11:13:46,928 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 11:13:46,929 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 11:13:46,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:46,929 INFO L85 PathProgramCache]: Analyzing trace with hash -237627691, now seen corresponding path program 16 times [2023-01-28 11:13:46,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:46,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644571735] [2023-01-28 11:13:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:46,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:13:47,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:47,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644571735] [2023-01-28 11:13:47,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644571735] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:47,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186183791] [2023-01-28 11:13:47,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:13:47,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:47,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:47,138 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 11:13:47,140 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 11:13:47,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:13:47,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:47,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 11:13:47,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:13:47,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:13:47,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186183791] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:47,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:47,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 11:13:47,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633258212] [2023-01-28 11:13:47,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:47,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 11:13:47,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:47,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 11:13:47,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-01-28 11:13:47,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 11:13:47,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1532 transitions, 43046 flow. Second operand has 18 states, 18 states have (on average 54.611111111111114) internal successors, (983), 18 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:47,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:47,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 11:13:47,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:57,762 INFO L130 PetriNetUnfolder]: 5122/10337 cut-off events. [2023-01-28 11:13:57,763 INFO L131 PetriNetUnfolder]: For 712938/712938 co-relation queries the response was YES. [2023-01-28 11:13:57,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129036 conditions, 10337 events. 5122/10337 cut-off events. For 712938/712938 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 91470 event pairs, 427 based on Foata normal form. 114/10451 useless extension candidates. Maximal degree in co-relation 127131. Up to 2325 conditions per place. [2023-01-28 11:13:57,916 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 972 selfloop transitions, 1052 changer transitions 27/2051 dead transitions. [2023-01-28 11:13:57,917 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 2051 transitions, 59007 flow [2023-01-28 11:13:57,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-01-28 11:13:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-01-28 11:13:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4105 transitions. [2023-01-28 11:13:57,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40716127752430076 [2023-01-28 11:13:57,921 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4105 transitions. [2023-01-28 11:13:57,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4105 transitions. [2023-01-28 11:13:57,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:57,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4105 transitions. [2023-01-28 11:13:57,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 57.816901408450704) internal successors, (4105), 71 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:57,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 142.0) internal successors, (10224), 72 states have internal predecessors, (10224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:57,932 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 142.0) internal successors, (10224), 72 states have internal predecessors, (10224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:57,932 INFO L175 Difference]: Start difference. First operand has 396 places, 1532 transitions, 43046 flow. Second operand 71 states and 4105 transitions. [2023-01-28 11:13:57,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 2051 transitions, 59007 flow [2023-01-28 11:14:05,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 2051 transitions, 56640 flow, removed 1109 selfloop flow, removed 20 redundant places. [2023-01-28 11:14:05,412 INFO L231 Difference]: Finished difference. Result has 460 places, 1676 transitions, 49207 flow [2023-01-28 11:14:05,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=39499, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=845, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=49207, PETRI_PLACES=460, PETRI_TRANSITIONS=1676} [2023-01-28 11:14:05,414 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 440 predicate places. [2023-01-28 11:14:05,414 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 1676 transitions, 49207 flow [2023-01-28 11:14:05,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 54.611111111111114) internal successors, (983), 18 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:05,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:14:05,415 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:14:05,421 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 11:14:05,616 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 11:14:05,617 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 11:14:05,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:14:05,617 INFO L85 PathProgramCache]: Analyzing trace with hash 513615913, now seen corresponding path program 17 times [2023-01-28 11:14:05,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:14:05,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332890664] [2023-01-28 11:14:05,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:14:05,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:14:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:14:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:14:05,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:14:05,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332890664] [2023-01-28 11:14:05,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332890664] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:14:05,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350148089] [2023-01-28 11:14:05,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:14:05,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:14:05,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:14:05,807 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 11:14:05,809 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 11:14:05,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:14:05,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:14:05,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 11:14:05,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:14:06,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:14:06,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:14:06,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:14:06,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350148089] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:14:06,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:14:06,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2023-01-28 11:14:06,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626997212] [2023-01-28 11:14:06,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:14:06,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 11:14:06,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:14:06,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 11:14:06,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2023-01-28 11:14:06,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-01-28 11:14:06,563 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 1676 transitions, 49207 flow. Second operand has 21 states, 21 states have (on average 59.57142857142857) internal successors, (1251), 21 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:06,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:14:06,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-01-28 11:14:06,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:14:15,591 INFO L130 PetriNetUnfolder]: 5662/11197 cut-off events. [2023-01-28 11:14:15,591 INFO L131 PetriNetUnfolder]: For 869833/869833 co-relation queries the response was YES. [2023-01-28 11:14:15,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143812 conditions, 11197 events. 5662/11197 cut-off events. For 869833/869833 co-relation queries the response was YES. Maximal size of possible extension queue 823. Compared 97444 event pairs, 2 based on Foata normal form. 190/11387 useless extension candidates. Maximal degree in co-relation 142094. Up to 3106 conditions per place. [2023-01-28 11:14:15,771 INFO L137 encePairwiseOnDemand]: 135/142 looper letters, 945 selfloop transitions, 1076 changer transitions 8/2029 dead transitions. [2023-01-28 11:14:15,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 2029 transitions, 62816 flow [2023-01-28 11:14:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 11:14:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 11:14:15,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1713 transitions. [2023-01-28 11:14:15,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44679186228482004 [2023-01-28 11:14:15,773 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1713 transitions. [2023-01-28 11:14:15,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1713 transitions. [2023-01-28 11:14:15,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:14:15,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1713 transitions. [2023-01-28 11:14:15,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 63.44444444444444) internal successors, (1713), 27 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:15,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:15,778 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 142.0) internal successors, (3976), 28 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:15,778 INFO L175 Difference]: Start difference. First operand has 460 places, 1676 transitions, 49207 flow. Second operand 27 states and 1713 transitions. [2023-01-28 11:14:15,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 2029 transitions, 62816 flow [2023-01-28 11:14:25,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 2029 transitions, 58736 flow, removed 1854 selfloop flow, removed 30 redundant places. [2023-01-28 11:14:25,566 INFO L231 Difference]: Finished difference. Result has 454 places, 1901 transitions, 55933 flow [2023-01-28 11:14:25,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=45648, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=859, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=55933, PETRI_PLACES=454, PETRI_TRANSITIONS=1901} [2023-01-28 11:14:25,568 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 434 predicate places. [2023-01-28 11:14:25,568 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1901 transitions, 55933 flow [2023-01-28 11:14:25,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 59.57142857142857) internal successors, (1251), 21 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:25,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:14:25,568 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:14:25,574 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 11:14:25,772 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 11:14:25,772 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 11:14:25,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:14:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1936626857, now seen corresponding path program 18 times [2023-01-28 11:14:25,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:14:25,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712616042] [2023-01-28 11:14:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:14:25,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:14:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:14:25,999 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 11:14:25,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:14:25,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712616042] [2023-01-28 11:14:25,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712616042] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:14:25,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342444426] [2023-01-28 11:14:25,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:14:25,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:14:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:14:26,009 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 11:14:26,013 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 11:14:26,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 11:14:26,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:14:26,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 11:14:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:14:26,268 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 11:14:26,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:14:26,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:14:26,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342444426] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:14:26,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:14:26,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-28 11:14:26,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628071002] [2023-01-28 11:14:26,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:14:26,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 11:14:26,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:14:26,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 11:14:26,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-01-28 11:14:26,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 11:14:26,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1901 transitions, 55933 flow. Second operand has 23 states, 23 states have (on average 54.78260869565217) internal successors, (1260), 23 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:26,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:14:26,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 11:14:26,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:14:53,341 WARN L222 SmtUtils]: Spent 9.39s on a formula simplification. DAG size of input: 59 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:15:01,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 11:15:30,948 INFO L130 PetriNetUnfolder]: 7740/15776 cut-off events. [2023-01-28 11:15:30,948 INFO L131 PetriNetUnfolder]: For 1304288/1304288 co-relation queries the response was YES. [2023-01-28 11:15:31,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207120 conditions, 15776 events. 7740/15776 cut-off events. For 1304288/1304288 co-relation queries the response was YES. Maximal size of possible extension queue 1188. Compared 149744 event pairs, 250 based on Foata normal form. 90/15866 useless extension candidates. Maximal degree in co-relation 203770. Up to 4787 conditions per place. [2023-01-28 11:15:31,209 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1280 selfloop transitions, 1582 changer transitions 13/2875 dead transitions. [2023-01-28 11:15:31,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 2875 transitions, 88332 flow [2023-01-28 11:15:31,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-01-28 11:15:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-01-28 11:15:31,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3646 transitions. [2023-01-28 11:15:31,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4141299409359382 [2023-01-28 11:15:31,212 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3646 transitions. [2023-01-28 11:15:31,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3646 transitions. [2023-01-28 11:15:31,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:15:31,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3646 transitions. [2023-01-28 11:15:31,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 58.806451612903224) internal successors, (3646), 62 states have internal predecessors, (3646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:31,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 142.0) internal successors, (8946), 63 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:31,221 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 142.0) internal successors, (8946), 63 states have internal predecessors, (8946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:31,221 INFO L175 Difference]: Start difference. First operand has 454 places, 1901 transitions, 55933 flow. Second operand 62 states and 3646 transitions. [2023-01-28 11:15:31,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 2875 transitions, 88332 flow [2023-01-28 11:15:53,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 2875 transitions, 85683 flow, removed 1191 selfloop flow, removed 14 redundant places. [2023-01-28 11:15:53,590 INFO L231 Difference]: Finished difference. Result has 525 places, 2447 transitions, 77411 flow [2023-01-28 11:15:53,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=54081, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=77411, PETRI_PLACES=525, PETRI_TRANSITIONS=2447} [2023-01-28 11:15:53,592 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 505 predicate places. [2023-01-28 11:15:53,592 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 2447 transitions, 77411 flow [2023-01-28 11:15:53,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.78260869565217) internal successors, (1260), 23 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:53,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:15:53,592 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:15:53,600 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 11:15:53,796 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 11:15:53,797 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 11:15:53,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:15:53,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2080956109, now seen corresponding path program 19 times [2023-01-28 11:15:53,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:15:53,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909461217] [2023-01-28 11:15:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:15:53,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:15:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:15:54,075 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 11:15:54,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:15:54,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909461217] [2023-01-28 11:15:54,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909461217] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:15:54,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130153668] [2023-01-28 11:15:54,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:15:54,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:15:54,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:15:54,076 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 11:15:54,078 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 11:15:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:15:54,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 11:15:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:15:54,293 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 11:15:54,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:15:54,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:15:54,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130153668] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:15:54,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:15:54,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-28 11:15:54,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339113430] [2023-01-28 11:15:54,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:15:54,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 11:15:54,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:15:54,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 11:15:54,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-01-28 11:15:54,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 11:15:54,770 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 2447 transitions, 77411 flow. Second operand has 25 states, 25 states have (on average 54.88) internal successors, (1372), 25 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:54,770 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:15:54,770 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 11:15:54,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:16:15,543 INFO L130 PetriNetUnfolder]: 9322/18993 cut-off events. [2023-01-28 11:16:15,543 INFO L131 PetriNetUnfolder]: For 1710867/1710867 co-relation queries the response was YES. [2023-01-28 11:16:15,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257805 conditions, 18993 events. 9322/18993 cut-off events. For 1710867/1710867 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 186418 event pairs, 234 based on Foata normal form. 265/19258 useless extension candidates. Maximal degree in co-relation 255731. Up to 6184 conditions per place. [2023-01-28 11:16:15,870 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 1054 selfloop transitions, 2024 changer transitions 110/3188 dead transitions. [2023-01-28 11:16:15,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 3188 transitions, 107342 flow [2023-01-28 11:16:15,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 11:16:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 11:16:15,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2456 transitions. [2023-01-28 11:16:15,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4118041582830315 [2023-01-28 11:16:15,873 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2456 transitions. [2023-01-28 11:16:15,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2456 transitions. [2023-01-28 11:16:15,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:16:15,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2456 transitions. [2023-01-28 11:16:15,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 58.476190476190474) internal successors, (2456), 42 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:15,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:15,881 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:15,881 INFO L175 Difference]: Start difference. First operand has 525 places, 2447 transitions, 77411 flow. Second operand 42 states and 2456 transitions. [2023-01-28 11:16:15,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 3188 transitions, 107342 flow [2023-01-28 11:16:44,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 3188 transitions, 103797 flow, removed 1712 selfloop flow, removed 19 redundant places. [2023-01-28 11:16:45,049 INFO L231 Difference]: Finished difference. Result has 565 places, 2867 transitions, 97562 flow [2023-01-28 11:16:45,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=74863, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1604, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=744, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=97562, PETRI_PLACES=565, PETRI_TRANSITIONS=2867} [2023-01-28 11:16:45,051 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 545 predicate places. [2023-01-28 11:16:45,051 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 2867 transitions, 97562 flow [2023-01-28 11:16:45,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.88) internal successors, (1372), 25 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:45,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:16:45,051 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:16:45,061 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 11:16:45,255 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 11:16:45,256 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 11:16:45,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:16:45,256 INFO L85 PathProgramCache]: Analyzing trace with hash 711617715, now seen corresponding path program 20 times [2023-01-28 11:16:45,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:16:45,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609436494] [2023-01-28 11:16:45,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:16:45,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:16:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:16:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:16:45,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:16:45,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609436494] [2023-01-28 11:16:45,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609436494] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:16:45,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218852966] [2023-01-28 11:16:45,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:16:45,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:16:45,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:16:45,438 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 11:16:45,440 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 11:16:45,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:16:45,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:16:45,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 11:16:45,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:16:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:16:45,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:16:45,968 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:16:45,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218852966] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:16:45,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:16:45,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 20 [2023-01-28 11:16:45,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765624594] [2023-01-28 11:16:45,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:16:45,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 11:16:45,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:16:45,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 11:16:45,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-01-28 11:16:45,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 11:16:45,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 2867 transitions, 97562 flow. Second operand has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:45,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:16:45,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 11:16:45,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:17:07,364 INFO L130 PetriNetUnfolder]: 10097/20280 cut-off events. [2023-01-28 11:17:07,365 INFO L131 PetriNetUnfolder]: For 2210609/2210609 co-relation queries the response was YES. [2023-01-28 11:17:07,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302717 conditions, 20280 events. 10097/20280 cut-off events. For 2210609/2210609 co-relation queries the response was YES. Maximal size of possible extension queue 1556. Compared 198812 event pairs, 1043 based on Foata normal form. 60/20340 useless extension candidates. Maximal degree in co-relation 300193. Up to 6034 conditions per place. [2023-01-28 11:17:07,735 INFO L137 encePairwiseOnDemand]: 134/142 looper letters, 1353 selfloop transitions, 2098 changer transitions 26/3477 dead transitions. [2023-01-28 11:17:07,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 3477 transitions, 125840 flow [2023-01-28 11:17:07,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 11:17:07,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 11:17:07,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1891 transitions. [2023-01-28 11:17:07,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035424669227486 [2023-01-28 11:17:07,737 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1891 transitions. [2023-01-28 11:17:07,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1891 transitions. [2023-01-28 11:17:07,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:17:07,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1891 transitions. [2023-01-28 11:17:07,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.303030303030305) internal successors, (1891), 33 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:07,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:07,742 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 142.0) internal successors, (4828), 34 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:07,742 INFO L175 Difference]: Start difference. First operand has 565 places, 2867 transitions, 97562 flow. Second operand 33 states and 1891 transitions. [2023-01-28 11:17:07,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 3477 transitions, 125840 flow [2023-01-28 11:17:50,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 3477 transitions, 122086 flow, removed 1780 selfloop flow, removed 20 redundant places. [2023-01-28 11:17:50,865 INFO L231 Difference]: Finished difference. Result has 588 places, 3296 transitions, 117303 flow [2023-01-28 11:17:50,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=93718, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1685, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1097, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=117303, PETRI_PLACES=588, PETRI_TRANSITIONS=3296} [2023-01-28 11:17:50,867 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 568 predicate places. [2023-01-28 11:17:50,867 INFO L495 AbstractCegarLoop]: Abstraction has has 588 places, 3296 transitions, 117303 flow [2023-01-28 11:17:50,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:50,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:17:50,868 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:17:50,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-28 11:17:51,068 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 11:17:51,068 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 11:17:51,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:17:51,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1514686341, now seen corresponding path program 21 times [2023-01-28 11:17:51,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:17:51,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149580934] [2023-01-28 11:17:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:17:51,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:17:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:17:51,262 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 11:17:51,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:17:51,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149580934] [2023-01-28 11:17:51,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149580934] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:17:51,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375015633] [2023-01-28 11:17:51,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:17:51,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:17:51,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:17:51,265 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 11:17:51,269 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 11:17:51,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:17:51,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:17:51,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 11:17:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:17:51,524 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 11:17:51,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:17:51,750 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 11:17:51,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375015633] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:17:51,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:17:51,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-28 11:17:51,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420639153] [2023-01-28 11:17:51,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:17:51,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 11:17:51,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:17:51,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 11:17:51,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-01-28 11:17:51,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 142 [2023-01-28 11:17:51,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 588 places, 3296 transitions, 117303 flow. Second operand has 22 states, 22 states have (on average 54.81818181818182) internal successors, (1206), 22 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:51,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:17:51,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 142 [2023-01-28 11:17:51,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:18:14,835 INFO L130 PetriNetUnfolder]: 10266/20606 cut-off events. [2023-01-28 11:18:14,835 INFO L131 PetriNetUnfolder]: For 2243067/2243067 co-relation queries the response was YES. [2023-01-28 11:18:15,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312449 conditions, 20606 events. 10266/20606 cut-off events. For 2243067/2243067 co-relation queries the response was YES. Maximal size of possible extension queue 1589. Compared 202219 event pairs, 1309 based on Foata normal form. 55/20661 useless extension candidates. Maximal degree in co-relation 309690. Up to 17400 conditions per place. [2023-01-28 11:18:15,218 INFO L137 encePairwiseOnDemand]: 133/142 looper letters, 3123 selfloop transitions, 430 changer transitions 27/3580 dead transitions. [2023-01-28 11:18:15,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 628 places, 3580 transitions, 132035 flow [2023-01-28 11:18:15,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 11:18:15,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 11:18:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2476 transitions. [2023-01-28 11:18:15,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151576123407109 [2023-01-28 11:18:15,221 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2476 transitions. [2023-01-28 11:18:15,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2476 transitions. [2023-01-28 11:18:15,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:18:15,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2476 transitions. [2023-01-28 11:18:15,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 58.95238095238095) internal successors, (2476), 42 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:15,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:15,226 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 142.0) internal successors, (6106), 43 states have internal predecessors, (6106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:15,226 INFO L175 Difference]: Start difference. First operand has 588 places, 3296 transitions, 117303 flow. Second operand 42 states and 2476 transitions. [2023-01-28 11:18:15,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 628 places, 3580 transitions, 132035 flow [2023-01-28 11:19:07,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 3580 transitions, 127044 flow, removed 1959 selfloop flow, removed 13 redundant places. [2023-01-28 11:19:07,842 INFO L231 Difference]: Finished difference. Result has 631 places, 3347 transitions, 116448 flow [2023-01-28 11:19:07,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=142, PETRI_DIFFERENCE_MINUEND_FLOW=112920, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2871, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=116448, PETRI_PLACES=631, PETRI_TRANSITIONS=3347} [2023-01-28 11:19:07,845 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 611 predicate places. [2023-01-28 11:19:07,845 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 3347 transitions, 116448 flow [2023-01-28 11:19:07,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.81818181818182) internal successors, (1206), 22 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:07,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:19:07,846 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:19:07,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-01-28 11:19:08,050 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 11:19:08,050 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 11:19:08,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:19:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2046041721, now seen corresponding path program 22 times [2023-01-28 11:19:08,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:19:08,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590448284] [2023-01-28 11:19:08,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:19:08,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:19:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:19:08,221 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 11:19:08,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:19:08,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590448284] [2023-01-28 11:19:08,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590448284] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:19:08,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692301681] [2023-01-28 11:19:08,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:19:08,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:19:08,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:19:08,222 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 11:19:08,223 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 11:19:08,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:19:08,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:19:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 11:19:08,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:19:08,422 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 11:19:08,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:19:51,285 WARN L222 SmtUtils]: Spent 35.00s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:19:58,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:19:58,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692301681] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:19:58,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:19:58,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-28 11:19:58,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139285154] [2023-01-28 11:19:58,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:19:58,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 11:19:58,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:19:58,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 11:19:58,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=358, Unknown=3, NotChecked=0, Total=462 [2023-01-28 11:19:58,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 142 [2023-01-28 11:19:58,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 3347 transitions, 116448 flow. Second operand has 22 states, 22 states have (on average 59.77272727272727) internal successors, (1315), 22 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:58,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:19:58,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 142 [2023-01-28 11:19:58,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:20:02,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:05,573 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:09,341 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (div c_thread1Thread1of1ForFork1_~i~0 4294967296))) (let ((.cse2 (mod c_~M~0 4294967296)) (.cse1 (* .cse4 4294967296)) (.cse0 (= c_thread2Thread1of1ForFork0_~i~1 0))) (and (or .cse0 (and (<= 1 c_thread2Thread1of1ForFork0_~i~1) (<= (+ c_thread2Thread1of1ForFork0_~i~1 .cse1 1) c_thread1Thread1of1ForFork1_~i~0))) (< 2 .cse2) (or (let ((.cse3 (- .cse2))) (and (or (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse2 8589934590 (* 4294967296 (div (+ (- 8589934590) c_thread2Thread1of1ForFork0_~i~1) 4294967296)))) (< c_thread2Thread1of1ForFork0_~i~1 (+ 4294967295 (* 4294967296 (div (+ c_thread2Thread1of1ForFork0_~i~1 .cse3 1) 4294967296))))) (or (< c_thread2Thread1of1ForFork0_~i~1 (+ (* (div (+ c_thread2Thread1of1ForFork0_~i~1 .cse3) 4294967296) 4294967296) 4294967296)) (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse2 (* (div (+ (- 8589934591) c_thread2Thread1of1ForFork0_~i~1) 4294967296) 4294967296) 8589934591))))) (<= .cse2 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296))) (<= .cse4 0) (forall ((aux_div_aux_mod_aux_mod_~M~0_21_32_43 Int) (aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int) (aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int) (aux_div_aux_mod_~M~0_21_32 Int)) (let ((.cse6 (* aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967296))) (let ((.cse7 (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse6 4294967295)) (.cse5 (* aux_div_aux_mod_aux_mod_~M~0_21_32_43 4294967296)) (.cse8 (* 4294967296 aux_div_aux_mod_~M~0_21_32))) (or (<= (+ .cse5 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse6 (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296))) (<= .cse7 .cse5) (< 2 (mod (+ (* aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967295) 1) 4294967296)) (<= .cse7 (+ .cse5 .cse8)) (<= 4294967296 aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95) (<= .cse7 0) (<= (+ .cse5 .cse8 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse6 (mod (+ c_thread1Thread1of1ForFork1_~i~0 2) 4294967296))) (< 0 (+ aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 1)))))) (<= (+ 2 .cse1) c_thread1Thread1of1ForFork1_~i~0) (<= 1 c_thread1Thread1of1ForFork1_~i~0) (or .cse0 (= c_thread2Thread1of1ForFork0_~i~1 1))))) is different from false [2023-01-28 11:20:11,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:14,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:30,256 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* (div c_~M~0 4294967296) 4294967296)) (.cse2 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296))) (and (let ((.cse0 (mod c_~M~0 4294967296))) (or (let ((.cse1 (- .cse0))) (and (or (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse0 8589934590 (* 4294967296 (div (+ (- 8589934590) c_thread2Thread1of1ForFork0_~i~1) 4294967296)))) (< c_thread2Thread1of1ForFork0_~i~1 (+ 4294967295 (* 4294967296 (div (+ c_thread2Thread1of1ForFork0_~i~1 .cse1 1) 4294967296))))) (or (< c_thread2Thread1of1ForFork0_~i~1 (+ (* (div (+ c_thread2Thread1of1ForFork0_~i~1 .cse1) 4294967296) 4294967296) 4294967296)) (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse0 (* (div (+ (- 8589934591) c_thread2Thread1of1ForFork0_~i~1) 4294967296) 4294967296) 8589934591))))) (<= .cse0 .cse2))) (<= (+ 3 .cse3) c_~M~0) (or (and (<= 1 c_thread2Thread1of1ForFork0_~i~1) (<= (+ c_thread2Thread1of1ForFork0_~i~1 2 .cse3) c_~M~0)) (= c_thread2Thread1of1ForFork0_~i~1 0)) (forall ((aux_div_aux_mod_aux_mod_~M~0_21_32_43 Int) (aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int) (aux_div_aux_mod_~M~0_21_32 Int) (aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int)) (let ((.cse6 (* aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967296))) (let ((.cse5 (* 4294967296 aux_div_aux_mod_~M~0_21_32)) (.cse7 (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse6 4294967295)) (.cse4 (* aux_div_aux_mod_aux_mod_~M~0_21_32_43 4294967296))) (or (<= (+ .cse4 .cse5 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse6 (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296))) (<= .cse7 .cse4) (< 2 (mod (+ (* aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967295) 1) 4294967296)) (<= .cse7 (+ .cse4 .cse5)) (<= 4294967296 aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95) (<= .cse7 0) (<= (+ .cse4 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse6 .cse2)) (< 0 (+ aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 1)))))))) is different from false [2023-01-28 11:20:32,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:34,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:36,579 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:38,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:43,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:45,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:56,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:57,987 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:21:00,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:21:02,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:21:32,280 WARN L222 SmtUtils]: Spent 21.14s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:21:56,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:21:58,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:00,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:02,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:04,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:06,960 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (div c_thread1Thread1of1ForFork1_~i~0 4294967296))) (let ((.cse2 (mod c_~M~0 4294967296)) (.cse1 (* .cse4 4294967296)) (.cse0 (= c_thread2Thread1of1ForFork0_~i~1 0))) (and (or .cse0 (and (<= 1 c_thread2Thread1of1ForFork0_~i~1) (<= (+ c_thread2Thread1of1ForFork0_~i~1 .cse1 1) c_thread1Thread1of1ForFork1_~i~0))) (< 2 .cse2) (or (let ((.cse3 (- .cse2))) (and (or (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse2 8589934590 (* 4294967296 (div (+ (- 8589934590) c_thread2Thread1of1ForFork0_~i~1) 4294967296)))) (< c_thread2Thread1of1ForFork0_~i~1 (+ 4294967295 (* 4294967296 (div (+ c_thread2Thread1of1ForFork0_~i~1 .cse3 1) 4294967296))))) (or (< c_thread2Thread1of1ForFork0_~i~1 (+ (* (div (+ c_thread2Thread1of1ForFork0_~i~1 .cse3) 4294967296) 4294967296) 4294967296)) (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse2 (* (div (+ (- 8589934591) c_thread2Thread1of1ForFork0_~i~1) 4294967296) 4294967296) 8589934591))))) (<= .cse2 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296))) (<= .cse4 0) (forall ((aux_div_aux_mod_aux_mod_~M~0_21_32_43 Int) (aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int) (aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int) (aux_div_aux_mod_~M~0_21_32 Int)) (let ((.cse6 (* aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967296))) (let ((.cse7 (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse6 4294967295)) (.cse5 (* aux_div_aux_mod_aux_mod_~M~0_21_32_43 4294967296)) (.cse8 (* 4294967296 aux_div_aux_mod_~M~0_21_32))) (or (<= (+ .cse5 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse6 (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296))) (<= .cse7 .cse5) (< 2 (mod (+ (* aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967295) 1) 4294967296)) (<= .cse7 (+ .cse5 .cse8)) (<= 4294967296 aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95) (<= .cse7 0) (<= (+ .cse5 .cse8 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse6 (mod (+ c_thread1Thread1of1ForFork1_~i~0 2) 4294967296))) (< 0 (+ aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 1)))))) (<= (+ 2 .cse1) c_thread1Thread1of1ForFork1_~i~0) (<= 1 c_thread1Thread1of1ForFork1_~i~0) (or (= c_thread2Thread1of1ForFork0_~i~1 2) .cse0 (= c_thread2Thread1of1ForFork0_~i~1 1))))) is different from false [2023-01-28 11:22:09,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:15,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:17,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:19,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:21,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:23,636 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:26,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:28,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:30,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:32,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:37,940 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* (div (+ (- 8589934591) c_thread2Thread1of1ForFork0_~i~1) 4294967296) 4294967296)) (.cse6 (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296)) (.cse1 (* 4294967296 (div (+ (- 8589934590) c_thread2Thread1of1ForFork0_~i~1) 4294967296))) (.cse4 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296))) (and (let ((.cse0 (mod c_~M~0 4294967296))) (or (let ((.cse2 (- .cse0))) (and (or (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse0 8589934590 .cse1)) (< c_thread2Thread1of1ForFork0_~i~1 (+ 4294967295 (* 4294967296 (div (+ c_thread2Thread1of1ForFork0_~i~1 .cse2 1) 4294967296))))) (or (< c_thread2Thread1of1ForFork0_~i~1 (+ (* (div (+ c_thread2Thread1of1ForFork0_~i~1 .cse2) 4294967296) 4294967296) 4294967296)) (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse0 .cse3 8589934591))))) (<= .cse0 .cse4))) (<= (+ c_thread2Thread1of1ForFork0_~i~1 (* (div c_~M~0 4294967296) 4294967296) 1) c_~M~0) (<= (div c_thread1Thread1of1ForFork1_~i~0 4294967296) 0) (let ((.cse5 (+ (* (div (+ (- c_thread2Thread1of1ForFork0_~i~1) 8589934590) 4294967296) 4294967296) c_thread2Thread1of1ForFork0_~i~1))) (or (< .cse5 (+ (* 4294967296 (div (+ .cse6 (- 4294967295)) 4294967296)) 8589934592)) (< 4294967294 .cse4) (forall ((aux_div_aux_mod_aux_mod_~M~0_21_32_43 Int) (aux_div_aux_mod_~M~0_21_32 Int)) (let ((.cse7 (* aux_div_aux_mod_aux_mod_~M~0_21_32_43 4294967296))) (or (< (+ c_thread2Thread1of1ForFork0_~i~1 .cse7 (* 4294967296 aux_div_aux_mod_~M~0_21_32)) (+ 8589934592 .cse6 .cse3)) (< .cse5 (+ .cse4 (* 8589934592 aux_div_aux_mod_~M~0_21_32) 1)) (< .cse5 (+ 4294967296 .cse7))))))) (forall ((aux_div_aux_mod_aux_mod_~M~0_21_32_43 Int) (aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int) (aux_div_aux_mod_~M~0_21_32 Int) (aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int)) (let ((.cse11 (* aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967296))) (let ((.cse10 (* 4294967296 aux_div_aux_mod_~M~0_21_32)) (.cse8 (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse11 4294967295)) (.cse9 (* aux_div_aux_mod_aux_mod_~M~0_21_32_43 4294967296))) (or (<= .cse8 c_thread2Thread1of1ForFork0_~i~1) (<= (+ c_thread2Thread1of1ForFork0_~i~1 .cse9 .cse10 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse11 .cse6)) (<= .cse8 (+ c_thread2Thread1of1ForFork0_~i~1 .cse9 .cse10)) (<= .cse8 (+ c_thread2Thread1of1ForFork0_~i~1 .cse9)) (<= 4294967296 aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95) (< c_thread2Thread1of1ForFork0_~i~1 (+ (mod (+ c_thread2Thread1of1ForFork0_~i~1 (* aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967295) 1) 4294967296) 8589934590 .cse1)) (<= (+ c_thread2Thread1of1ForFork0_~i~1 .cse9 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse11 .cse4)) (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse11 4294967295)))))) (<= 1 c_thread1Thread1of1ForFork1_~i~0) (< 0 (+ 1 (div c_thread2Thread1of1ForFork0_~i~1 4294967296))))) is different from false [2023-01-28 11:22:42,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:44,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:46,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:49,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:51,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:24:07,839 WARN L222 SmtUtils]: Spent 38.87s on a formula simplification that was a NOOP. DAG size: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:24:09,961 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (* (div (+ (- 8589934591) c_thread2Thread1of1ForFork0_~i~1) 4294967296) 4294967296)) (.cse1 (* 4294967296 (div (+ (- 8589934590) c_thread2Thread1of1ForFork0_~i~1) 4294967296))) (.cse6 (mod (+ c_thread1Thread1of1ForFork1_~i~0 1) 4294967296)) (.cse4 (mod c_thread1Thread1of1ForFork1_~i~0 4294967296))) (and (let ((.cse0 (mod c_~M~0 4294967296))) (or (let ((.cse2 (- .cse0))) (and (or (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse0 8589934590 .cse1)) (< c_thread2Thread1of1ForFork0_~i~1 (+ 4294967295 (* 4294967296 (div (+ c_thread2Thread1of1ForFork0_~i~1 .cse2 1) 4294967296))))) (or (< c_thread2Thread1of1ForFork0_~i~1 (+ (* (div (+ c_thread2Thread1of1ForFork0_~i~1 .cse2) 4294967296) 4294967296) 4294967296)) (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse0 .cse3 8589934591))))) (<= .cse0 .cse4))) (<= (+ c_thread2Thread1of1ForFork0_~i~1 (* (div c_~M~0 4294967296) 4294967296) 1) c_~M~0) (let ((.cse5 (+ (* (div (+ (- c_thread2Thread1of1ForFork0_~i~1) 8589934590) 4294967296) 4294967296) c_thread2Thread1of1ForFork0_~i~1))) (or (< .cse5 (+ (* 4294967296 (div (+ .cse6 (- 4294967295)) 4294967296)) 8589934592)) (< 4294967294 .cse4) (forall ((aux_div_aux_mod_aux_mod_~M~0_21_32_43 Int) (aux_div_aux_mod_~M~0_21_32 Int)) (let ((.cse7 (* aux_div_aux_mod_aux_mod_~M~0_21_32_43 4294967296))) (or (< (+ c_thread2Thread1of1ForFork0_~i~1 .cse7 (* 4294967296 aux_div_aux_mod_~M~0_21_32)) (+ 8589934592 .cse6 .cse3)) (< .cse5 (+ .cse4 (* 8589934592 aux_div_aux_mod_~M~0_21_32) 1)) (< .cse5 (+ 4294967296 .cse7))))))) (forall ((aux_div_aux_mod_aux_mod_~M~0_21_32_43 Int) (aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int) (aux_div_aux_mod_~M~0_21_32 Int) (aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int)) (let ((.cse11 (* aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967296))) (let ((.cse10 (* 4294967296 aux_div_aux_mod_~M~0_21_32)) (.cse8 (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse11 4294967295)) (.cse9 (* aux_div_aux_mod_aux_mod_~M~0_21_32_43 4294967296))) (or (<= .cse8 c_thread2Thread1of1ForFork0_~i~1) (<= (+ c_thread2Thread1of1ForFork0_~i~1 .cse9 .cse10 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse11 .cse6)) (<= .cse8 (+ c_thread2Thread1of1ForFork0_~i~1 .cse9 .cse10)) (<= .cse8 (+ c_thread2Thread1of1ForFork0_~i~1 .cse9)) (<= 4294967296 aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95) (< c_thread2Thread1of1ForFork0_~i~1 (+ (mod (+ c_thread2Thread1of1ForFork0_~i~1 (* aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967295) 1) 4294967296) 8589934590 .cse1)) (<= (+ c_thread2Thread1of1ForFork0_~i~1 .cse9 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse11 .cse4)) (< c_thread2Thread1of1ForFork0_~i~1 (+ .cse11 4294967295)))))) (< 0 (+ 1 (div c_thread2Thread1of1ForFork0_~i~1 4294967296))) (forall ((aux_div_aux_mod_aux_mod_~M~0_21_32_43 Int) (aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int) (aux_div_aux_mod_~M~0_21_32 Int) (aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 Int)) (let ((.cse14 (* aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967296))) (let ((.cse13 (* 4294967296 aux_div_aux_mod_~M~0_21_32)) (.cse15 (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse14 4294967295)) (.cse12 (* aux_div_aux_mod_aux_mod_~M~0_21_32_43 4294967296))) (or (<= (+ .cse12 .cse13 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse14 .cse6)) (<= .cse15 .cse12) (< 2 (mod (+ (* aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 4294967295) 1) 4294967296)) (<= .cse15 (+ .cse12 .cse13)) (<= 4294967296 aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95) (<= .cse15 0) (<= (+ .cse12 1) (+ aux_mod_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 .cse14 .cse4)) (< 0 (+ aux_div_aux_mod_aux_mod_aux_mod_~M~0_21_32_43_95 1)))))))) is different from false [2023-01-28 11:24:54,323 WARN L222 SmtUtils]: Spent 25.62s on a formula simplification. DAG size of input: 56 DAG size of output: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:24:56,389 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:24:58,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:25:00,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:25:06,940 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:25:09,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:25:11,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:25:12,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:25:14,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:25:16,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:25:18,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2023-01-28 11:25:30,333 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 11:25:30,333 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 11:25:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-28 11:25:31,336 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 11:25:31,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 11:25:31,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-01-28 11:25:31,536 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 11:25:31,536 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 58 known predicates. [2023-01-28 11:25:31,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 11:25:31,538 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 11:25:31,538 INFO L445 BasicCegarLoop]: Path program histogram: [22, 2, 1] [2023-01-28 11:25:31,540 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 11:25:31,540 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 11:25:31,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 11:25:31 BasicIcfg [2023-01-28 11:25:31,542 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 11:25:31,542 INFO L158 Benchmark]: Toolchain (without parser) took 854769.04ms. Allocated memory was 343.9MB in the beginning and 5.0GB in the end (delta: 4.7GB). Free memory was 306.7MB in the beginning and 3.0GB in the end (delta: -2.7GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2023-01-28 11:25:31,542 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 343.9MB. Free memory is still 292.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 11:25:31,542 INFO L158 Benchmark]: CACSL2BoogieTranslator took 159.01ms. Allocated memory is still 343.9MB. Free memory was 306.7MB in the beginning and 295.5MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 11:25:31,542 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.39ms. Allocated memory is still 343.9MB. Free memory was 295.5MB in the beginning and 293.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:25:31,542 INFO L158 Benchmark]: Boogie Preprocessor took 27.47ms. Allocated memory is still 343.9MB. Free memory was 293.8MB in the beginning and 292.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:25:31,543 INFO L158 Benchmark]: RCFGBuilder took 279.43ms. Allocated memory is still 343.9MB. Free memory was 292.6MB in the beginning and 278.8MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 11:25:31,543 INFO L158 Benchmark]: TraceAbstraction took 854272.70ms. Allocated memory was 343.9MB in the beginning and 5.0GB in the end (delta: 4.7GB). Free memory was 278.3MB in the beginning and 3.0GB in the end (delta: -2.7GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. [2023-01-28 11:25:31,544 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 343.9MB. Free memory is still 292.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 159.01ms. Allocated memory is still 343.9MB. Free memory was 306.7MB in the beginning and 295.5MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.39ms. Allocated memory is still 343.9MB. Free memory was 295.5MB in the beginning and 293.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.47ms. Allocated memory is still 343.9MB. Free memory was 293.8MB in the beginning and 292.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 279.43ms. Allocated memory is still 343.9MB. Free memory was 292.6MB in the beginning and 278.8MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 854272.70ms. Allocated memory was 343.9MB in the beginning and 5.0GB in the end (delta: 4.7GB). Free memory was 278.3MB in the beginning and 3.0GB in the end (delta: -2.7GB). Peak memory consumption was 2.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 70 PlacesBefore, 20 PlacesAfterwards, 69 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 6 FixpointIterations, 35 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 63 TotalNumberOfCompositions, 443 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 436, independent: 434, independent conditional: 0, independent unconditional: 434, 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: 219, independent: 217, independent conditional: 0, independent unconditional: 217, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 436, independent: 217, independent conditional: 0, independent unconditional: 217, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 219, unknown conditional: 0, unknown unconditional: 219] , 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 - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 58 known predicates. - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 58 known predicates. - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 58 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 91 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: 854.2s, OverallIterations: 25, TraceHistogramMax: 3, PathProgramHistogramMax: 22, EmptinessCheckTime: 0.0s, AutomataDifference: 735.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 52 mSolverCounterUnknown, 3926 SdHoareTripleChecker+Valid, 148.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3926 mSDsluCounter, 433 SdHoareTripleChecker+Invalid, 143.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 167 IncrementalHoareTripleChecker+Unchecked, 316 mSDsCounter, 746 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12424 IncrementalHoareTripleChecker+Invalid, 13389 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 746 mSolverCounterUnsat, 117 mSDtfsCounter, 12424 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1776 GetRequests, 902 SyntacticMatches, 19 SemanticMatches, 854 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 10841 ImplicationChecksByTransitivity, 352.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117303occurred in iteration=23, InterpolantAutomatonStates: 641, 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, 110.4s InterpolantComputationTime, 803 NumberOfCodeBlocks, 791 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 1107 ConstructedInterpolants, 3 QuantifiedInterpolants, 10186 SizeOfPredicates, 180 NumberOfNonLiveVariables, 2739 ConjunctsInSsa, 309 ConjunctsInUnsatCore, 70 InterpolantComputations, 4 PerfectInterpolantSequences, 73/429 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown