/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 BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 04:02:30,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 04:02:30,471 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 04:02:30,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 04:02:30,493 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 04:02:30,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 04:02:30,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 04:02:30,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 04:02:30,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 04:02:30,498 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 04:02:30,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 04:02:30,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 04:02:30,499 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 04:02:30,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 04:02:30,501 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 04:02:30,502 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 04:02:30,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 04:02:30,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 04:02:30,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 04:02:30,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 04:02:30,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 04:02:30,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 04:02:30,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 04:02:30,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 04:02:30,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 04:02:30,513 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 04:02:30,513 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 04:02:30,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 04:02:30,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 04:02:30,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 04:02:30,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 04:02:30,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 04:02:30,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 04:02:30,517 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 04:02:30,518 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 04:02:30,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 04:02:30,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 04:02:30,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 04:02:30,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 04:02:30,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 04:02:30,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 04:02:30,521 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 04:02:30,539 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 04:02:30,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 04:02:30,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 04:02:30,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 04:02:30,540 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 04:02:30,540 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 04:02:30,541 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 04:02:30,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 04:02:30,541 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 04:02:30,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 04:02:30,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 04:02:30,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 04:02:30,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 04:02:30,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 04:02:30,542 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 04:02:30,542 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 04:02:30,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 04:02:30,542 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 04:02:30,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 04:02:30,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 04:02:30,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 04:02:30,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 04:02:30,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 04:02:30,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:02:30,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 04:02:30,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 04:02:30,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 04:02:30,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 04:02:30,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 04:02:30,543 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 04:02:30,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 04:02:30,543 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 04:02:30,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 04:02:30,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 04:02:30,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 04:02:30,747 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 04:02:30,747 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 04:02:30,748 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-01-28 04:02:31,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 04:02:32,018 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 04:02:32,018 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-01-28 04:02:32,024 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561375804/6c521c7d578045f496f62593f3e73ef8/FLAG25664b00d [2023-01-28 04:02:32,039 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/561375804/6c521c7d578045f496f62593f3e73ef8 [2023-01-28 04:02:32,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 04:02:32,044 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 04:02:32,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 04:02:32,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 04:02:32,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 04:02:32,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b181979 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32, skipping insertion in model container [2023-01-28 04:02:32,050 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,056 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 04:02:32,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 04:02:32,255 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2681,2694] [2023-01-28 04:02:32,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:02:32,279 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 04:02:32,314 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c[2681,2694] [2023-01-28 04:02:32,317 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:02:32,323 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:02:32,324 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:02:32,330 INFO L208 MainTranslator]: Completed translation [2023-01-28 04:02:32,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32 WrapperNode [2023-01-28 04:02:32,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 04:02:32,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 04:02:32,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 04:02:32,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 04:02:32,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,391 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 198 [2023-01-28 04:02:32,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 04:02:32,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 04:02:32,393 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 04:02:32,393 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 04:02:32,401 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,401 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,415 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 04:02:32,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 04:02:32,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 04:02:32,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 04:02:32,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (1/1) ... [2023-01-28 04:02:32,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:02:32,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:32,465 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 04:02:32,466 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 04:02:32,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 04:02:32,494 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 04:02:32,494 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 04:02:32,495 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 04:02:32,495 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 04:02:32,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 04:02:32,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 04:02:32,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 04:02:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 04:02:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 04:02:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 04:02:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 04:02:32,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 04:02:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 04:02:32,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 04:02:32,503 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 04:02:32,584 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 04:02:32,585 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 04:02:32,930 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 04:02:33,077 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 04:02:33,077 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-28 04:02:33,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:02:33 BoogieIcfgContainer [2023-01-28 04:02:33,079 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 04:02:33,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 04:02:33,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 04:02:33,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 04:02:33,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 04:02:32" (1/3) ... [2023-01-28 04:02:33,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29713661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:02:33, skipping insertion in model container [2023-01-28 04:02:33,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:02:32" (2/3) ... [2023-01-28 04:02:33,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29713661 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:02:33, skipping insertion in model container [2023-01-28 04:02:33,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:02:33" (3/3) ... [2023-01-28 04:02:33,086 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-01-28 04:02:33,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 04:02:33,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 04:02:33,129 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 04:02:33,185 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 04:02:33,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 155 transitions, 326 flow [2023-01-28 04:02:33,280 INFO L130 PetriNetUnfolder]: 13/153 cut-off events. [2023-01-28 04:02:33,280 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:02:33,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 13/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-01-28 04:02:33,285 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 155 transitions, 326 flow [2023-01-28 04:02:33,292 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 145 transitions, 302 flow [2023-01-28 04:02:33,295 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 04:02:33,302 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 145 transitions, 302 flow [2023-01-28 04:02:33,305 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 145 transitions, 302 flow [2023-01-28 04:02:33,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 302 flow [2023-01-28 04:02:33,331 INFO L130 PetriNetUnfolder]: 13/145 cut-off events. [2023-01-28 04:02:33,331 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:02:33,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 145 events. 13/145 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 86 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-01-28 04:02:33,333 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-28 04:02:38,072 INFO L134 LiptonReduction]: Checked pairs total: 553 [2023-01-28 04:02:38,072 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-01-28 04:02:38,089 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 04:02:38,094 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;@221c59d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 04:02:38,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 04:02:38,105 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2023-01-28 04:02:38,105 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:02:38,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:38,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:38,107 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 04:02:38,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash -511726821, now seen corresponding path program 1 times [2023-01-28 04:02:38,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:38,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259635165] [2023-01-28 04:02:38,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:38,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:38,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:38,509 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 04:02:38,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:38,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259635165] [2023-01-28 04:02:38,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259635165] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:02:38,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:02:38,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 04:02:38,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046317116] [2023-01-28 04:02:38,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:02:38,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 04:02:38,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 04:02:38,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 04:02:38,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 305 [2023-01-28 04:02:38,555 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:38,555 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:38,555 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 305 [2023-01-28 04:02:38,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:38,620 INFO L130 PetriNetUnfolder]: 67/118 cut-off events. [2023-01-28 04:02:38,620 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 04:02:38,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 118 events. 67/118 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 329 event pairs, 9 based on Foata normal form. 1/76 useless extension candidates. Maximal degree in co-relation 179. Up to 85 conditions per place. [2023-01-28 04:02:38,622 INFO L137 encePairwiseOnDemand]: 301/305 looper letters, 23 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-01-28 04:02:38,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-01-28 04:02:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 04:02:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 04:02:38,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-01-28 04:02:38,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47978142076502733 [2023-01-28 04:02:38,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-01-28 04:02:38,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-01-28 04:02:38,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:38,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-01-28 04:02:38,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:38,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:38,648 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:38,649 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 439 transitions. [2023-01-28 04:02:38,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-01-28 04:02:38,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 04:02:38,653 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 61 flow [2023-01-28 04:02:38,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=21, PETRI_TRANSITIONS=21} [2023-01-28 04:02:38,657 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-01-28 04:02:38,657 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 61 flow [2023-01-28 04:02:38,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:38,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:38,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:38,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 04:02:38,659 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 04:02:38,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1737231503, now seen corresponding path program 1 times [2023-01-28 04:02:38,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:38,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941820239] [2023-01-28 04:02:38,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:38,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:38,771 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 04:02:38,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:38,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941820239] [2023-01-28 04:02:38,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941820239] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:02:38,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:02:38,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 04:02:38,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002992131] [2023-01-28 04:02:38,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:02:38,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:02:38,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:38,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:02:38,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:02:38,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:38,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 21 transitions, 61 flow. Second operand has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:38,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:38,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:38,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:38,902 INFO L130 PetriNetUnfolder]: 94/179 cut-off events. [2023-01-28 04:02:38,902 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-01-28 04:02:38,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 179 events. 94/179 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 576 event pairs, 26 based on Foata normal form. 4/181 useless extension candidates. Maximal degree in co-relation 144. Up to 88 conditions per place. [2023-01-28 04:02:38,904 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 34 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2023-01-28 04:02:38,904 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 46 transitions, 223 flow [2023-01-28 04:02:38,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:02:38,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:02:38,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 678 transitions. [2023-01-28 04:02:38,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44459016393442624 [2023-01-28 04:02:38,909 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 678 transitions. [2023-01-28 04:02:38,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 678 transitions. [2023-01-28 04:02:38,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:38,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 678 transitions. [2023-01-28 04:02:38,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:38,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:38,915 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:38,915 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 61 flow. Second operand 5 states and 678 transitions. [2023-01-28 04:02:38,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 46 transitions, 223 flow [2023-01-28 04:02:38,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 46 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 04:02:38,917 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 85 flow [2023-01-28 04:02:38,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=85, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-01-28 04:02:38,918 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-01-28 04:02:38,918 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 85 flow [2023-01-28 04:02:38,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.2) internal successors, (651), 5 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:38,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:38,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:38,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 04:02:38,919 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 04:02:38,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:38,919 INFO L85 PathProgramCache]: Analyzing trace with hash -940242461, now seen corresponding path program 1 times [2023-01-28 04:02:38,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:38,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595704704] [2023-01-28 04:02:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:38,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:38,995 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 04:02:38,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:38,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595704704] [2023-01-28 04:02:38,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595704704] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:02:38,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113403304] [2023-01-28 04:02:38,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:38,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:38,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:38,999 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 04:02:39,025 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 04:02:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:39,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:02:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:02:39,211 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 04:02:39,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 04:02:39,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113403304] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:02:39,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 04:02:39,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-01-28 04:02:39,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041664830] [2023-01-28 04:02:39,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:02:39,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 04:02:39,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:39,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 04:02:39,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-28 04:02:39,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 305 [2023-01-28 04:02:39,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:39,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 305 [2023-01-28 04:02:39,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:39,333 INFO L130 PetriNetUnfolder]: 91/206 cut-off events. [2023-01-28 04:02:39,333 INFO L131 PetriNetUnfolder]: For 234/256 co-relation queries the response was YES. [2023-01-28 04:02:39,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 569 conditions, 206 events. 91/206 cut-off events. For 234/256 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 859 event pairs, 60 based on Foata normal form. 44/240 useless extension candidates. Maximal degree in co-relation 451. Up to 132 conditions per place. [2023-01-28 04:02:39,335 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 20 selfloop transitions, 2 changer transitions 23/47 dead transitions. [2023-01-28 04:02:39,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 47 transitions, 239 flow [2023-01-28 04:02:39,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:02:39,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:02:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2023-01-28 04:02:39,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39672131147540984 [2023-01-28 04:02:39,337 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2023-01-28 04:02:39,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2023-01-28 04:02:39,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:39,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2023-01-28 04:02:39,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,342 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,342 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 85 flow. Second operand 5 states and 605 transitions. [2023-01-28 04:02:39,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 47 transitions, 239 flow [2023-01-28 04:02:39,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 230 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 04:02:39,344 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 98 flow [2023-01-28 04:02:39,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=31, PETRI_TRANSITIONS=24} [2023-01-28 04:02:39,345 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2023-01-28 04:02:39,345 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 98 flow [2023-01-28 04:02:39,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:39,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:39,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 04:02:39,552 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 04:02:39,553 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 04:02:39,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:39,553 INFO L85 PathProgramCache]: Analyzing trace with hash 166324188, now seen corresponding path program 1 times [2023-01-28 04:02:39,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:39,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582499169] [2023-01-28 04:02:39,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:39,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:02:39,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:39,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582499169] [2023-01-28 04:02:39,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582499169] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:02:39,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:02:39,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 04:02:39,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304461533] [2023-01-28 04:02:39,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:02:39,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:02:39,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:39,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:02:39,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:02:39,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:39,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,641 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:39,642 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:39,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:39,779 INFO L130 PetriNetUnfolder]: 114/218 cut-off events. [2023-01-28 04:02:39,779 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-01-28 04:02:39,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 218 events. 114/218 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 695 event pairs, 40 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 618. Up to 133 conditions per place. [2023-01-28 04:02:39,781 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 38 selfloop transitions, 7 changer transitions 10/55 dead transitions. [2023-01-28 04:02:39,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 55 transitions, 335 flow [2023-01-28 04:02:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 04:02:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 04:02:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 810 transitions. [2023-01-28 04:02:39,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-01-28 04:02:39,784 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 810 transitions. [2023-01-28 04:02:39,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 810 transitions. [2023-01-28 04:02:39,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:39,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 810 transitions. [2023-01-28 04:02:39,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,790 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,790 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 98 flow. Second operand 6 states and 810 transitions. [2023-01-28 04:02:39,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 55 transitions, 335 flow [2023-01-28 04:02:39,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 317 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-28 04:02:39,793 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 150 flow [2023-01-28 04:02:39,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2023-01-28 04:02:39,793 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-01-28 04:02:39,794 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 150 flow [2023-01-28 04:02:39,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:39,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:39,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 04:02:39,795 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 04:02:39,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:39,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1772606940, now seen corresponding path program 2 times [2023-01-28 04:02:39,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:39,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121149609] [2023-01-28 04:02:39,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:39,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:02:39,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:39,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121149609] [2023-01-28 04:02:39,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121149609] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:02:39,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:02:39,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 04:02:39,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729033297] [2023-01-28 04:02:39,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:02:39,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:02:39,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:39,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:02:39,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:02:39,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:39,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:39,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:39,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:39,971 INFO L130 PetriNetUnfolder]: 117/224 cut-off events. [2023-01-28 04:02:39,971 INFO L131 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2023-01-28 04:02:39,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 224 events. 117/224 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 743 event pairs, 38 based on Foata normal form. 4/226 useless extension candidates. Maximal degree in co-relation 786. Up to 125 conditions per place. [2023-01-28 04:02:39,974 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 45 selfloop transitions, 9 changer transitions 1/55 dead transitions. [2023-01-28 04:02:39,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 371 flow [2023-01-28 04:02:39,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:02:39,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:02:39,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 683 transitions. [2023-01-28 04:02:39,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478688524590164 [2023-01-28 04:02:39,977 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 683 transitions. [2023-01-28 04:02:39,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 683 transitions. [2023-01-28 04:02:39,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:39,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 683 transitions. [2023-01-28 04:02:39,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,982 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,982 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 150 flow. Second operand 5 states and 683 transitions. [2023-01-28 04:02:39,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 371 flow [2023-01-28 04:02:39,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 341 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-01-28 04:02:39,985 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 185 flow [2023-01-28 04:02:39,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=39, PETRI_TRANSITIONS=33} [2023-01-28 04:02:39,986 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 17 predicate places. [2023-01-28 04:02:39,986 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 185 flow [2023-01-28 04:02:39,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.4) internal successors, (652), 5 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:39,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:39,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:39,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 04:02:39,987 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 04:02:39,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:39,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1182769632, now seen corresponding path program 1 times [2023-01-28 04:02:39,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:39,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299260108] [2023-01-28 04:02:39,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:39,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:40,057 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 04:02:40,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:40,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299260108] [2023-01-28 04:02:40,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299260108] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:02:40,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333685473] [2023-01-28 04:02:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:40,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:40,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:40,059 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 04:02:40,089 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 04:02:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:40,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:02:40,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:02:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:02:40,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 04:02:40,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333685473] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:02:40,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 04:02:40,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-01-28 04:02:40,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084096458] [2023-01-28 04:02:40,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:02:40,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 04:02:40,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:40,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 04:02:40,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-28 04:02:40,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 305 [2023-01-28 04:02:40,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 33 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:40,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:40,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 305 [2023-01-28 04:02:40,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:40,308 INFO L130 PetriNetUnfolder]: 119/249 cut-off events. [2023-01-28 04:02:40,308 INFO L131 PetriNetUnfolder]: For 633/648 co-relation queries the response was YES. [2023-01-28 04:02:40,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 907 conditions, 249 events. 119/249 cut-off events. For 633/648 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 968 event pairs, 67 based on Foata normal form. 22/256 useless extension candidates. Maximal degree in co-relation 882. Up to 202 conditions per place. [2023-01-28 04:02:40,310 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 28 selfloop transitions, 2 changer transitions 10/44 dead transitions. [2023-01-28 04:02:40,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 303 flow [2023-01-28 04:02:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 04:02:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 04:02:40,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-01-28 04:02:40,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983606557377049 [2023-01-28 04:02:40,312 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-01-28 04:02:40,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-01-28 04:02:40,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:40,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-01-28 04:02:40,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.5) internal successors, (486), 4 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:40,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:40,316 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:40,316 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 185 flow. Second operand 4 states and 486 transitions. [2023-01-28 04:02:40,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 303 flow [2023-01-28 04:02:40,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 04:02:40,319 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 202 flow [2023-01-28 04:02:40,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=43, PETRI_TRANSITIONS=34} [2023-01-28 04:02:40,319 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2023-01-28 04:02:40,319 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 202 flow [2023-01-28 04:02:40,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.75) internal successors, (471), 4 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:40,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:40,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:40,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 04:02:40,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-28 04:02:40,526 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 04:02:40,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:40,526 INFO L85 PathProgramCache]: Analyzing trace with hash -919263952, now seen corresponding path program 1 times [2023-01-28 04:02:40,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:40,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080136606] [2023-01-28 04:02:40,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:40,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:40,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:40,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080136606] [2023-01-28 04:02:40,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080136606] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:02:40,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:02:40,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 04:02:40,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462341095] [2023-01-28 04:02:40,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:02:40,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:02:40,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:40,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:02:40,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:02:40,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:40,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 34 transitions, 202 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:40,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:40,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:40,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:40,705 INFO L130 PetriNetUnfolder]: 105/203 cut-off events. [2023-01-28 04:02:40,705 INFO L131 PetriNetUnfolder]: For 383/383 co-relation queries the response was YES. [2023-01-28 04:02:40,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 203 events. 105/203 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 643 event pairs, 36 based on Foata normal form. 6/208 useless extension candidates. Maximal degree in co-relation 733. Up to 124 conditions per place. [2023-01-28 04:02:40,708 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 35 selfloop transitions, 9 changer transitions 8/52 dead transitions. [2023-01-28 04:02:40,708 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 381 flow [2023-01-28 04:02:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:02:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:02:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-01-28 04:02:40,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44524590163934424 [2023-01-28 04:02:40,710 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-01-28 04:02:40,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-01-28 04:02:40,710 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:40,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-01-28 04:02:40,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:40,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:40,716 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:40,716 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 202 flow. Second operand 5 states and 679 transitions. [2023-01-28 04:02:40,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 381 flow [2023-01-28 04:02:40,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 365 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-01-28 04:02:40,719 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 211 flow [2023-01-28 04:02:40,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=45, PETRI_TRANSITIONS=34} [2023-01-28 04:02:40,720 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-01-28 04:02:40,720 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 211 flow [2023-01-28 04:02:40,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:40,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:40,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:40,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 04:02:40,721 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 04:02:40,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:40,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1922624012, now seen corresponding path program 2 times [2023-01-28 04:02:40,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:40,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720917027] [2023-01-28 04:02:40,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:40,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:40,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:40,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:40,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:40,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720917027] [2023-01-28 04:02:40,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720917027] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:02:40,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767168290] [2023-01-28 04:02:40,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:02:40,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:40,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:40,783 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 04:02:40,797 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 04:02:40,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:02:40,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:02:40,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 04:02:40,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:02:40,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:40,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:02:40,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:40,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767168290] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:02:40,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:02:40,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 04:02:40,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070199392] [2023-01-28 04:02:40,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:02:40,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 04:02:40,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:40,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 04:02:40,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 04:02:40,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:40,948 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 34 transitions, 211 flow. Second operand has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:40,948 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:40,949 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:40,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:41,079 INFO L130 PetriNetUnfolder]: 104/195 cut-off events. [2023-01-28 04:02:41,079 INFO L131 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2023-01-28 04:02:41,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 771 conditions, 195 events. 104/195 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 567 event pairs, 16 based on Foata normal form. 4/198 useless extension candidates. Maximal degree in co-relation 743. Up to 92 conditions per place. [2023-01-28 04:02:41,081 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 43 selfloop transitions, 8 changer transitions 1/52 dead transitions. [2023-01-28 04:02:41,081 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 402 flow [2023-01-28 04:02:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:02:41,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:02:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 675 transitions. [2023-01-28 04:02:41,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-01-28 04:02:41,083 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 675 transitions. [2023-01-28 04:02:41,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 675 transitions. [2023-01-28 04:02:41,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:41,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 675 transitions. [2023-01-28 04:02:41,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:41,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:41,088 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:41,088 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 211 flow. Second operand 5 states and 675 transitions. [2023-01-28 04:02:41,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 402 flow [2023-01-28 04:02:41,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 372 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-28 04:02:41,091 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 233 flow [2023-01-28 04:02:41,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=233, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-01-28 04:02:41,091 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-01-28 04:02:41,092 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 233 flow [2023-01-28 04:02:41,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.0) internal successors, (1040), 8 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:41,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:41,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:41,100 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-01-28 04:02:41,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:41,300 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 04:02:41,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:41,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1388345664, now seen corresponding path program 1 times [2023-01-28 04:02:41,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:41,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157298856] [2023-01-28 04:02:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:41,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:41,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:41,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:41,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:41,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157298856] [2023-01-28 04:02:41,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157298856] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:02:41,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587742693] [2023-01-28 04:02:41,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:41,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:41,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:41,365 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 04:02:41,387 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 04:02:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:41,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 04:02:41,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:02:41,489 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:41,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:02:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:41,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587742693] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:02:41,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:02:41,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 04:02:41,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86145917] [2023-01-28 04:02:41,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:02:41,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 04:02:41,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:41,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 04:02:41,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 04:02:41,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:41,520 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 233 flow. Second operand has 8 states, 8 states have (on average 130.125) internal successors, (1041), 8 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:41,520 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:41,520 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:41,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:41,630 INFO L130 PetriNetUnfolder]: 112/209 cut-off events. [2023-01-28 04:02:41,631 INFO L131 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2023-01-28 04:02:41,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 826 conditions, 209 events. 112/209 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 624 event pairs, 20 based on Foata normal form. 6/214 useless extension candidates. Maximal degree in co-relation 796. Up to 102 conditions per place. [2023-01-28 04:02:41,632 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 46 selfloop transitions, 11 changer transitions 1/58 dead transitions. [2023-01-28 04:02:41,633 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 437 flow [2023-01-28 04:02:41,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:02:41,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:02:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-01-28 04:02:41,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44524590163934424 [2023-01-28 04:02:41,635 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-01-28 04:02:41,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-01-28 04:02:41,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:41,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-01-28 04:02:41,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.8) internal successors, (679), 5 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:41,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:41,639 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:41,639 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 233 flow. Second operand 5 states and 679 transitions. [2023-01-28 04:02:41,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 437 flow [2023-01-28 04:02:41,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 424 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-28 04:02:41,643 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 273 flow [2023-01-28 04:02:41,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=273, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-01-28 04:02:41,643 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2023-01-28 04:02:41,644 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 273 flow [2023-01-28 04:02:41,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 130.125) internal successors, (1041), 8 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:41,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:41,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:41,653 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 04:02:41,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:41,851 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 04:02:41,851 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:41,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1906605968, now seen corresponding path program 2 times [2023-01-28 04:02:41,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:41,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234165494] [2023-01-28 04:02:41,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:41,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:41,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:41,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:41,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234165494] [2023-01-28 04:02:41,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234165494] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:02:41,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479463992] [2023-01-28 04:02:41,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:02:41,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:41,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:41,936 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 04:02:41,959 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 04:02:42,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:02:42,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:02:42,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 04:02:42,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:02:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:42,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:02:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:42,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479463992] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:02:42,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:02:42,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-28 04:02:42,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236965196] [2023-01-28 04:02:42,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:02:42,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 04:02:42,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:42,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 04:02:42,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-01-28 04:02:42,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:42,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 273 flow. Second operand has 10 states, 10 states have (on average 129.7) internal successors, (1297), 10 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:42,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:42,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:42,261 INFO L130 PetriNetUnfolder]: 128/237 cut-off events. [2023-01-28 04:02:42,261 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-01-28 04:02:42,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 994 conditions, 237 events. 128/237 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 746 event pairs, 20 based on Foata normal form. 6/242 useless extension candidates. Maximal degree in co-relation 962. Up to 112 conditions per place. [2023-01-28 04:02:42,264 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 54 selfloop transitions, 16 changer transitions 1/71 dead transitions. [2023-01-28 04:02:42,264 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 544 flow [2023-01-28 04:02:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:02:42,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:02:42,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1075 transitions. [2023-01-28 04:02:42,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405737704918033 [2023-01-28 04:02:42,267 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1075 transitions. [2023-01-28 04:02:42,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1075 transitions. [2023-01-28 04:02:42,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:42,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1075 transitions. [2023-01-28 04:02:42,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 134.375) internal successors, (1075), 8 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,274 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,274 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 273 flow. Second operand 8 states and 1075 transitions. [2023-01-28 04:02:42,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 544 flow [2023-01-28 04:02:42,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 530 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-28 04:02:42,279 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 326 flow [2023-01-28 04:02:42,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=326, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-01-28 04:02:42,279 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 36 predicate places. [2023-01-28 04:02:42,279 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 326 flow [2023-01-28 04:02:42,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 129.7) internal successors, (1297), 10 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:42,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:42,286 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 04:02:42,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-01-28 04:02:42,486 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 04:02:42,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:42,487 INFO L85 PathProgramCache]: Analyzing trace with hash 694440902, now seen corresponding path program 3 times [2023-01-28 04:02:42,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:42,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096517501] [2023-01-28 04:02:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:42,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:42,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:42,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096517501] [2023-01-28 04:02:42,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096517501] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:02:42,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:02:42,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 04:02:42,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487115554] [2023-01-28 04:02:42,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:02:42,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:02:42,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:42,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:02:42,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:02:42,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:42,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 326 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:42,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:42,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:42,709 INFO L130 PetriNetUnfolder]: 118/217 cut-off events. [2023-01-28 04:02:42,709 INFO L131 PetriNetUnfolder]: For 909/909 co-relation queries the response was YES. [2023-01-28 04:02:42,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1004 conditions, 217 events. 118/217 cut-off events. For 909/909 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 643 event pairs, 36 based on Foata normal form. 4/220 useless extension candidates. Maximal degree in co-relation 970. Up to 140 conditions per place. [2023-01-28 04:02:42,711 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 13 changer transitions 1/52 dead transitions. [2023-01-28 04:02:42,711 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 470 flow [2023-01-28 04:02:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:02:42,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:02:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 672 transitions. [2023-01-28 04:02:42,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44065573770491806 [2023-01-28 04:02:42,715 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 672 transitions. [2023-01-28 04:02:42,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 672 transitions. [2023-01-28 04:02:42,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:42,715 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 672 transitions. [2023-01-28 04:02:42,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,720 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,720 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 326 flow. Second operand 5 states and 672 transitions. [2023-01-28 04:02:42,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 470 flow [2023-01-28 04:02:42,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 436 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-01-28 04:02:42,725 INFO L231 Difference]: Finished difference. Result has 57 places, 40 transitions, 304 flow [2023-01-28 04:02:42,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=304, PETRI_PLACES=57, PETRI_TRANSITIONS=40} [2023-01-28 04:02:42,726 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2023-01-28 04:02:42,726 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 40 transitions, 304 flow [2023-01-28 04:02:42,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:42,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:42,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-28 04:02:42,728 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 04:02:42,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1217746086, now seen corresponding path program 3 times [2023-01-28 04:02:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:42,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325387550] [2023-01-28 04:02:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:42,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:42,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:42,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:42,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325387550] [2023-01-28 04:02:42,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325387550] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:02:42,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:02:42,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 04:02:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397493427] [2023-01-28 04:02:42,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:02:42,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:02:42,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:02:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:02:42,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:42,843 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 40 transitions, 304 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,843 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:42,843 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:42,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:42,926 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2023-01-28 04:02:42,926 INFO L131 PetriNetUnfolder]: For 759/759 co-relation queries the response was YES. [2023-01-28 04:02:42,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 192 events. 107/192 cut-off events. For 759/759 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 547 event pairs, 31 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 839. Up to 139 conditions per place. [2023-01-28 04:02:42,928 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 12 changer transitions 1/51 dead transitions. [2023-01-28 04:02:42,928 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 446 flow [2023-01-28 04:02:42,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:02:42,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:02:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 672 transitions. [2023-01-28 04:02:42,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44065573770491806 [2023-01-28 04:02:42,931 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 672 transitions. [2023-01-28 04:02:42,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 672 transitions. [2023-01-28 04:02:42,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:42,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 672 transitions. [2023-01-28 04:02:42,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.4) internal successors, (672), 5 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,936 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,936 INFO L175 Difference]: Start difference. First operand has 57 places, 40 transitions, 304 flow. Second operand 5 states and 672 transitions. [2023-01-28 04:02:42,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 446 flow [2023-01-28 04:02:42,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 405 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-01-28 04:02:42,940 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 275 flow [2023-01-28 04:02:42,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=275, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2023-01-28 04:02:42,941 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 31 predicate places. [2023-01-28 04:02:42,941 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 275 flow [2023-01-28 04:02:42,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:42,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:42,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:42,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-28 04:02:42,942 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 04:02:42,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:42,943 INFO L85 PathProgramCache]: Analyzing trace with hash -813997192, now seen corresponding path program 1 times [2023-01-28 04:02:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:42,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598899780] [2023-01-28 04:02:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:42,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:43,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:02:43,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:43,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598899780] [2023-01-28 04:02:43,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598899780] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:02:43,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253884783] [2023-01-28 04:02:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:43,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:43,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:43,246 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 04:02:43,268 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 04:02:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:43,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 04:02:43,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:02:43,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-01-28 04:02:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:43,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:02:43,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-01-28 04:02:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:43,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253884783] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:02:43,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:02:43,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-01-28 04:02:43,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621705934] [2023-01-28 04:02:43,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:02:43,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 04:02:43,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:43,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 04:02:43,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-01-28 04:02:43,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 305 [2023-01-28 04:02:43,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 275 flow. Second operand has 11 states, 11 states have (on average 106.45454545454545) internal successors, (1171), 11 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:43,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:43,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 305 [2023-01-28 04:02:43,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:43,688 INFO L130 PetriNetUnfolder]: 265/474 cut-off events. [2023-01-28 04:02:43,688 INFO L131 PetriNetUnfolder]: For 1330/1375 co-relation queries the response was YES. [2023-01-28 04:02:43,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1983 conditions, 474 events. 265/474 cut-off events. For 1330/1375 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1919 event pairs, 25 based on Foata normal form. 25/481 useless extension candidates. Maximal degree in co-relation 1423. Up to 197 conditions per place. [2023-01-28 04:02:43,692 INFO L137 encePairwiseOnDemand]: 298/305 looper letters, 63 selfloop transitions, 31 changer transitions 5/105 dead transitions. [2023-01-28 04:02:43,692 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 836 flow [2023-01-28 04:02:43,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:02:43,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:02:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 899 transitions. [2023-01-28 04:02:43,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3684426229508197 [2023-01-28 04:02:43,695 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 899 transitions. [2023-01-28 04:02:43,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 899 transitions. [2023-01-28 04:02:43,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:43,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 899 transitions. [2023-01-28 04:02:43,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.375) internal successors, (899), 8 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:43,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:43,700 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:43,700 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 275 flow. Second operand 8 states and 899 transitions. [2023-01-28 04:02:43,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 836 flow [2023-01-28 04:02:43,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 105 transitions, 760 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-01-28 04:02:43,704 INFO L231 Difference]: Finished difference. Result has 57 places, 67 transitions, 594 flow [2023-01-28 04:02:43,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=594, PETRI_PLACES=57, PETRI_TRANSITIONS=67} [2023-01-28 04:02:43,705 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2023-01-28 04:02:43,705 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 67 transitions, 594 flow [2023-01-28 04:02:43,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.45454545454545) internal successors, (1171), 11 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:43,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:43,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:43,716 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 04:02:43,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:43,912 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 04:02:43,912 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:43,912 INFO L85 PathProgramCache]: Analyzing trace with hash 585031802, now seen corresponding path program 2 times [2023-01-28 04:02:43,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:43,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993156859] [2023-01-28 04:02:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:43,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:02:44,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:44,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993156859] [2023-01-28 04:02:44,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993156859] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:02:44,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435593817] [2023-01-28 04:02:44,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:02:44,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:44,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:44,078 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 04:02:44,080 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 04:02:44,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:02:44,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:02:44,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 04:02:44,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:02:44,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-01-28 04:02:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:44,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:02:44,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-01-28 04:02:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 04:02:44,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435593817] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:02:44,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:02:44,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-01-28 04:02:44,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139267122] [2023-01-28 04:02:44,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:02:44,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 04:02:44,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:44,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 04:02:44,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-01-28 04:02:44,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 305 [2023-01-28 04:02:44,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 67 transitions, 594 flow. Second operand has 11 states, 11 states have (on average 106.45454545454545) internal successors, (1171), 11 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:44,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:44,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 305 [2023-01-28 04:02:44,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:44,587 INFO L130 PetriNetUnfolder]: 651/1159 cut-off events. [2023-01-28 04:02:44,587 INFO L131 PetriNetUnfolder]: For 4169/4249 co-relation queries the response was YES. [2023-01-28 04:02:44,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5153 conditions, 1159 events. 651/1159 cut-off events. For 4169/4249 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5920 event pairs, 108 based on Foata normal form. 47/1170 useless extension candidates. Maximal degree in co-relation 3372. Up to 479 conditions per place. [2023-01-28 04:02:44,594 INFO L137 encePairwiseOnDemand]: 298/305 looper letters, 83 selfloop transitions, 49 changer transitions 20/158 dead transitions. [2023-01-28 04:02:44,594 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 158 transitions, 1626 flow [2023-01-28 04:02:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:02:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:02:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 893 transitions. [2023-01-28 04:02:44,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36598360655737705 [2023-01-28 04:02:44,596 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 893 transitions. [2023-01-28 04:02:44,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 893 transitions. [2023-01-28 04:02:44,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:44,597 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 893 transitions. [2023-01-28 04:02:44,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.625) internal successors, (893), 8 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:44,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:44,602 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 305.0) internal successors, (2745), 9 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:44,602 INFO L175 Difference]: Start difference. First operand has 57 places, 67 transitions, 594 flow. Second operand 8 states and 893 transitions. [2023-01-28 04:02:44,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 158 transitions, 1626 flow [2023-01-28 04:02:44,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 158 transitions, 1568 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-01-28 04:02:44,613 INFO L231 Difference]: Finished difference. Result has 68 places, 105 transitions, 1193 flow [2023-01-28 04:02:44,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1193, PETRI_PLACES=68, PETRI_TRANSITIONS=105} [2023-01-28 04:02:44,614 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 46 predicate places. [2023-01-28 04:02:44,614 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 105 transitions, 1193 flow [2023-01-28 04:02:44,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 106.45454545454545) internal successors, (1171), 11 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:44,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:44,626 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:44,634 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 04:02:44,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:44,827 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 04:02:44,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:44,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1194162893, now seen corresponding path program 3 times [2023-01-28 04:02:44,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:44,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842458649] [2023-01-28 04:02:44,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:44,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:45,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:02:45,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:45,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842458649] [2023-01-28 04:02:45,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842458649] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:02:45,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054975157] [2023-01-28 04:02:45,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:02:45,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:45,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:45,333 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 04:02:45,335 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 04:02:45,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:02:45,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:02:45,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 04:02:45,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:02:45,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 04:02:45,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:02:45,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:02:45,690 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-28 04:02:45,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 41 [2023-01-28 04:02:45,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-28 04:02:45,794 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 04:02:45,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2023-01-28 04:02:45,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:02:45,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:02:46,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:02:46,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 84 [2023-01-28 04:02:46,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:02:46,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 228 treesize of output 277 [2023-01-28 04:02:46,248 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:02:46,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 184 treesize of output 215 [2023-01-28 04:02:46,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2023-01-28 04:02:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:02:52,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054975157] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:02:52,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:02:52,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-28 04:02:52,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618678010] [2023-01-28 04:02:52,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:02:52,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 04:02:52,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:52,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 04:02:52,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2023-01-28 04:02:52,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 305 [2023-01-28 04:02:52,170 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 105 transitions, 1193 flow. Second operand has 21 states, 21 states have (on average 92.14285714285714) internal successors, (1935), 21 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:52,170 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:52,170 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 305 [2023-01-28 04:02:52,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:56,984 INFO L130 PetriNetUnfolder]: 718/1290 cut-off events. [2023-01-28 04:02:56,984 INFO L131 PetriNetUnfolder]: For 6344/6426 co-relation queries the response was YES. [2023-01-28 04:02:56,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6248 conditions, 1290 events. 718/1290 cut-off events. For 6344/6426 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6847 event pairs, 123 based on Foata normal form. 50/1318 useless extension candidates. Maximal degree in co-relation 4513. Up to 662 conditions per place. [2023-01-28 04:02:56,993 INFO L137 encePairwiseOnDemand]: 297/305 looper letters, 78 selfloop transitions, 50 changer transitions 31/165 dead transitions. [2023-01-28 04:02:56,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 165 transitions, 1947 flow [2023-01-28 04:02:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 04:02:56,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 04:02:56,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 966 transitions. [2023-01-28 04:02:56,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31672131147540983 [2023-01-28 04:02:56,996 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 966 transitions. [2023-01-28 04:02:56,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 966 transitions. [2023-01-28 04:02:56,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:56,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 966 transitions. [2023-01-28 04:02:56,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 96.6) internal successors, (966), 10 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:57,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:57,002 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:57,002 INFO L175 Difference]: Start difference. First operand has 68 places, 105 transitions, 1193 flow. Second operand 10 states and 966 transitions. [2023-01-28 04:02:57,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 165 transitions, 1947 flow [2023-01-28 04:02:57,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 165 transitions, 1894 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-01-28 04:02:57,017 INFO L231 Difference]: Finished difference. Result has 79 places, 113 transitions, 1396 flow [2023-01-28 04:02:57,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1396, PETRI_PLACES=79, PETRI_TRANSITIONS=113} [2023-01-28 04:02:57,018 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 57 predicate places. [2023-01-28 04:02:57,018 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 113 transitions, 1396 flow [2023-01-28 04:02:57,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 92.14285714285714) internal successors, (1935), 21 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:57,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:57,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:57,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-28 04:02:57,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 04:02:57,225 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 04:02:57,225 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash 888256042, now seen corresponding path program 4 times [2023-01-28 04:02:57,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:57,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484300659] [2023-01-28 04:02:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:57,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:02:57,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:57,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484300659] [2023-01-28 04:02:57,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484300659] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:02:57,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132155777] [2023-01-28 04:02:57,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:02:57,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:57,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:57,325 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 04:02:57,327 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 04:02:57,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:02:57,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:02:57,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:02:57,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:02:57,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:02:57,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:02:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:02:57,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132155777] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:02:57,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:02:57,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 04:02:57,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55313728] [2023-01-28 04:02:57,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:02:57,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:02:57,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:57,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:02:57,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:02:57,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:57,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 113 transitions, 1396 flow. Second operand has 12 states, 12 states have (on average 129.58333333333334) internal successors, (1555), 12 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:57,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:57,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:57,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:58,031 INFO L130 PetriNetUnfolder]: 877/1639 cut-off events. [2023-01-28 04:02:58,032 INFO L131 PetriNetUnfolder]: For 7648/7648 co-relation queries the response was YES. [2023-01-28 04:02:58,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7955 conditions, 1639 events. 877/1639 cut-off events. For 7648/7648 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 9267 event pairs, 22 based on Foata normal form. 32/1669 useless extension candidates. Maximal degree in co-relation 7782. Up to 665 conditions per place. [2023-01-28 04:02:58,042 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 157 selfloop transitions, 105 changer transitions 23/285 dead transitions. [2023-01-28 04:02:58,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 285 transitions, 3529 flow [2023-01-28 04:02:58,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:02:58,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:02:58,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2659 transitions. [2023-01-28 04:02:58,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359016393442623 [2023-01-28 04:02:58,050 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2659 transitions. [2023-01-28 04:02:58,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2659 transitions. [2023-01-28 04:02:58,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:58,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2659 transitions. [2023-01-28 04:02:58,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.95) internal successors, (2659), 20 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:58,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:58,065 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:58,065 INFO L175 Difference]: Start difference. First operand has 79 places, 113 transitions, 1396 flow. Second operand 20 states and 2659 transitions. [2023-01-28 04:02:58,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 285 transitions, 3529 flow [2023-01-28 04:02:58,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 285 transitions, 3259 flow, removed 115 selfloop flow, removed 5 redundant places. [2023-01-28 04:02:58,090 INFO L231 Difference]: Finished difference. Result has 103 places, 180 transitions, 2340 flow [2023-01-28 04:02:58,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2340, PETRI_PLACES=103, PETRI_TRANSITIONS=180} [2023-01-28 04:02:58,091 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 81 predicate places. [2023-01-28 04:02:58,091 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 180 transitions, 2340 flow [2023-01-28 04:02:58,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.58333333333334) internal successors, (1555), 12 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:58,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:58,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:58,103 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 04:02:58,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 04:02:58,297 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 04:02:58,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:58,298 INFO L85 PathProgramCache]: Analyzing trace with hash -91606092, now seen corresponding path program 5 times [2023-01-28 04:02:58,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:58,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958162638] [2023-01-28 04:02:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:58,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:02:58,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:58,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958162638] [2023-01-28 04:02:58,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958162638] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:02:58,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704165007] [2023-01-28 04:02:58,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:02:58,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:58,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:58,393 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 04:02:58,416 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 04:02:58,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 04:02:58,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:02:58,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:02:58,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:02:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:02:58,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:02:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:02:58,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704165007] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:02:58,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:02:58,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 04:02:58,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915482546] [2023-01-28 04:02:58,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:02:58,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:02:58,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:58,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:02:58,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:02:58,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:58,586 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 180 transitions, 2340 flow. Second operand has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:58,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:58,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:58,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:02:59,096 INFO L130 PetriNetUnfolder]: 776/1509 cut-off events. [2023-01-28 04:02:59,096 INFO L131 PetriNetUnfolder]: For 13435/13435 co-relation queries the response was YES. [2023-01-28 04:02:59,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9109 conditions, 1509 events. 776/1509 cut-off events. For 13435/13435 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8818 event pairs, 96 based on Foata normal form. 64/1571 useless extension candidates. Maximal degree in co-relation 8613. Up to 762 conditions per place. [2023-01-28 04:02:59,109 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 157 selfloop transitions, 95 changer transitions 1/253 dead transitions. [2023-01-28 04:02:59,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 253 transitions, 3517 flow [2023-01-28 04:02:59,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 04:02:59,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 04:02:59,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1876 transitions. [2023-01-28 04:02:59,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43934426229508194 [2023-01-28 04:02:59,114 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1876 transitions. [2023-01-28 04:02:59,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1876 transitions. [2023-01-28 04:02:59,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:02:59,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1876 transitions. [2023-01-28 04:02:59,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 134.0) internal successors, (1876), 14 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:59,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:59,123 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:59,124 INFO L175 Difference]: Start difference. First operand has 103 places, 180 transitions, 2340 flow. Second operand 14 states and 1876 transitions. [2023-01-28 04:02:59,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 253 transitions, 3517 flow [2023-01-28 04:02:59,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 253 transitions, 3118 flow, removed 170 selfloop flow, removed 5 redundant places. [2023-01-28 04:02:59,166 INFO L231 Difference]: Finished difference. Result has 115 places, 186 transitions, 2378 flow [2023-01-28 04:02:59,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2378, PETRI_PLACES=115, PETRI_TRANSITIONS=186} [2023-01-28 04:02:59,166 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 93 predicate places. [2023-01-28 04:02:59,166 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 186 transitions, 2378 flow [2023-01-28 04:02:59,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:59,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:02:59,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:02:59,173 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 04:02:59,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 04:02:59,374 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 04:02:59,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:02:59,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1082840516, now seen corresponding path program 6 times [2023-01-28 04:02:59,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:02:59,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757415817] [2023-01-28 04:02:59,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:02:59,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:02:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:02:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:02:59,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:02:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757415817] [2023-01-28 04:02:59,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757415817] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:02:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579515663] [2023-01-28 04:02:59,470 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:02:59,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:02:59,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:02:59,473 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 04:02:59,486 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 04:02:59,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:02:59,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:02:59,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:02:59,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:02:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:02:59,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:02:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:02:59,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579515663] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:02:59,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:02:59,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 04:02:59,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197655481] [2023-01-28 04:02:59,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:02:59,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:02:59,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:02:59,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:02:59,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:02:59,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:02:59,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 186 transitions, 2378 flow. Second operand has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:02:59,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:02:59,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:02:59,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:00,341 INFO L130 PetriNetUnfolder]: 986/1971 cut-off events. [2023-01-28 04:03:00,341 INFO L131 PetriNetUnfolder]: For 19834/19834 co-relation queries the response was YES. [2023-01-28 04:03:00,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11734 conditions, 1971 events. 986/1971 cut-off events. For 19834/19834 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12605 event pairs, 22 based on Foata normal form. 26/1995 useless extension candidates. Maximal degree in co-relation 10978. Up to 625 conditions per place. [2023-01-28 04:03:00,358 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 165 selfloop transitions, 153 changer transitions 14/332 dead transitions. [2023-01-28 04:03:00,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 332 transitions, 4449 flow [2023-01-28 04:03:00,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 04:03:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 04:03:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3045 transitions. [2023-01-28 04:03:00,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43406985032074125 [2023-01-28 04:03:00,363 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3045 transitions. [2023-01-28 04:03:00,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3045 transitions. [2023-01-28 04:03:00,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:00,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3045 transitions. [2023-01-28 04:03:00,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 132.3913043478261) internal successors, (3045), 23 states have internal predecessors, (3045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:00,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 305.0) internal successors, (7320), 24 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:00,377 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 305.0) internal successors, (7320), 24 states have internal predecessors, (7320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:00,378 INFO L175 Difference]: Start difference. First operand has 115 places, 186 transitions, 2378 flow. Second operand 23 states and 3045 transitions. [2023-01-28 04:03:00,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 332 transitions, 4449 flow [2023-01-28 04:03:00,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 332 transitions, 4278 flow, removed 21 selfloop flow, removed 8 redundant places. [2023-01-28 04:03:00,445 INFO L231 Difference]: Finished difference. Result has 139 places, 235 transitions, 3422 flow [2023-01-28 04:03:00,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2241, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3422, PETRI_PLACES=139, PETRI_TRANSITIONS=235} [2023-01-28 04:03:00,446 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2023-01-28 04:03:00,446 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 235 transitions, 3422 flow [2023-01-28 04:03:00,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.0) internal successors, (1935), 15 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:00,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:00,447 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:00,459 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 04:03:00,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 04:03:00,653 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 04:03:00,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:00,653 INFO L85 PathProgramCache]: Analyzing trace with hash 549254058, now seen corresponding path program 7 times [2023-01-28 04:03:00,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:00,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865787132] [2023-01-28 04:03:00,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:00,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:00,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:00,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865787132] [2023-01-28 04:03:00,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865787132] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:00,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122020531] [2023-01-28 04:03:00,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:03:00,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:00,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:00,755 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 04:03:00,757 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 04:03:00,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:00,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:00,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:00,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:00,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122020531] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:00,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:00,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 04:03:00,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399836033] [2023-01-28 04:03:00,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:00,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:03:00,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:00,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:03:00,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:03:00,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:00,969 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 235 transitions, 3422 flow. Second operand has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:00,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:00,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:00,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:01,619 INFO L130 PetriNetUnfolder]: 1214/2390 cut-off events. [2023-01-28 04:03:01,619 INFO L131 PetriNetUnfolder]: For 42971/42971 co-relation queries the response was YES. [2023-01-28 04:03:01,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17251 conditions, 2390 events. 1214/2390 cut-off events. For 42971/42971 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15693 event pairs, 371 based on Foata normal form. 106/2494 useless extension candidates. Maximal degree in co-relation 16358. Up to 1604 conditions per place. [2023-01-28 04:03:01,641 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 239 selfloop transitions, 108 changer transitions 9/356 dead transitions. [2023-01-28 04:03:01,641 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 356 transitions, 5908 flow [2023-01-28 04:03:01,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 04:03:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 04:03:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1734 transitions. [2023-01-28 04:03:01,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373266078184111 [2023-01-28 04:03:01,644 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1734 transitions. [2023-01-28 04:03:01,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1734 transitions. [2023-01-28 04:03:01,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:01,645 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1734 transitions. [2023-01-28 04:03:01,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 133.3846153846154) internal successors, (1734), 13 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:01,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:01,651 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:01,651 INFO L175 Difference]: Start difference. First operand has 139 places, 235 transitions, 3422 flow. Second operand 13 states and 1734 transitions. [2023-01-28 04:03:01,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 356 transitions, 5908 flow [2023-01-28 04:03:01,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 356 transitions, 5526 flow, removed 161 selfloop flow, removed 7 redundant places. [2023-01-28 04:03:01,783 INFO L231 Difference]: Finished difference. Result has 149 places, 297 transitions, 4606 flow [2023-01-28 04:03:01,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=3113, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4606, PETRI_PLACES=149, PETRI_TRANSITIONS=297} [2023-01-28 04:03:01,821 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2023-01-28 04:03:01,821 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 297 transitions, 4606 flow [2023-01-28 04:03:01,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:01,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:01,822 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:01,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-01-28 04:03:02,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:02,023 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 04:03:02,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:02,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1583947118, now seen corresponding path program 8 times [2023-01-28 04:03:02,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:02,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723072332] [2023-01-28 04:03:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:02,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:02,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:02,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723072332] [2023-01-28 04:03:02,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723072332] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130190443] [2023-01-28 04:03:02,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:03:02,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:02,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:02,117 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 04:03:02,127 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 04:03:02,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:03:02,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:02,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:02,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130190443] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:02,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:02,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 04:03:02,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168039052] [2023-01-28 04:03:02,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:02,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:03:02,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:03:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:03:02,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:02,324 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 297 transitions, 4606 flow. Second operand has 13 states, 13 states have (on average 129.30769230769232) internal successors, (1681), 13 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:02,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:02,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:02,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:02,996 INFO L130 PetriNetUnfolder]: 1393/2776 cut-off events. [2023-01-28 04:03:02,996 INFO L131 PetriNetUnfolder]: For 61073/61073 co-relation queries the response was YES. [2023-01-28 04:03:03,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21427 conditions, 2776 events. 1393/2776 cut-off events. For 61073/61073 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 19089 event pairs, 152 based on Foata normal form. 48/2822 useless extension candidates. Maximal degree in co-relation 20398. Up to 1195 conditions per place. [2023-01-28 04:03:03,020 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 236 selfloop transitions, 196 changer transitions 8/440 dead transitions. [2023-01-28 04:03:03,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 440 transitions, 7324 flow [2023-01-28 04:03:03,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 04:03:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 04:03:03,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2012 transitions. [2023-01-28 04:03:03,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397814207650273 [2023-01-28 04:03:03,023 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2012 transitions. [2023-01-28 04:03:03,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2012 transitions. [2023-01-28 04:03:03,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:03,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2012 transitions. [2023-01-28 04:03:03,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 134.13333333333333) internal successors, (2012), 15 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:03,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:03,031 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:03,031 INFO L175 Difference]: Start difference. First operand has 149 places, 297 transitions, 4606 flow. Second operand 15 states and 2012 transitions. [2023-01-28 04:03:03,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 440 transitions, 7324 flow [2023-01-28 04:03:03,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 440 transitions, 6822 flow, removed 213 selfloop flow, removed 5 redundant places. [2023-01-28 04:03:03,247 INFO L231 Difference]: Finished difference. Result has 163 places, 352 transitions, 5735 flow [2023-01-28 04:03:03,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5735, PETRI_PLACES=163, PETRI_TRANSITIONS=352} [2023-01-28 04:03:03,247 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 141 predicate places. [2023-01-28 04:03:03,247 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 352 transitions, 5735 flow [2023-01-28 04:03:03,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.30769230769232) internal successors, (1681), 13 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:03,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:03,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:03,254 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 04:03:03,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-01-28 04:03:03,453 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 04:03:03,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:03,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1724744702, now seen corresponding path program 9 times [2023-01-28 04:03:03,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:03,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127965842] [2023-01-28 04:03:03,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:03,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:03,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:03,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127965842] [2023-01-28 04:03:03,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127965842] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:03,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754629789] [2023-01-28 04:03:03,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:03:03,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:03,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:03,545 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 04:03:03,553 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 04:03:03,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:03:03,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:03,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:03,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:03,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754629789] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:03,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:03,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 04:03:03,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022623340] [2023-01-28 04:03:03,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:03,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:03:03,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:03,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:03:03,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:03:03,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:03,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 352 transitions, 5735 flow. Second operand has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:03,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:03,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:03,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:04,806 INFO L130 PetriNetUnfolder]: 1684/3315 cut-off events. [2023-01-28 04:03:04,806 INFO L131 PetriNetUnfolder]: For 77074/77074 co-relation queries the response was YES. [2023-01-28 04:03:04,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26880 conditions, 3315 events. 1684/3315 cut-off events. For 77074/77074 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23491 event pairs, 232 based on Foata normal form. 102/3415 useless extension candidates. Maximal degree in co-relation 26354. Up to 2315 conditions per place. [2023-01-28 04:03:04,834 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 363 selfloop transitions, 137 changer transitions 3/503 dead transitions. [2023-01-28 04:03:04,834 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 503 transitions, 9411 flow [2023-01-28 04:03:04,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 04:03:04,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 04:03:04,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2261 transitions. [2023-01-28 04:03:04,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4360655737704918 [2023-01-28 04:03:04,838 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2261 transitions. [2023-01-28 04:03:04,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2261 transitions. [2023-01-28 04:03:04,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:04,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2261 transitions. [2023-01-28 04:03:04,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 133.0) internal successors, (2261), 17 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:04,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:04,846 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:04,846 INFO L175 Difference]: Start difference. First operand has 163 places, 352 transitions, 5735 flow. Second operand 17 states and 2261 transitions. [2023-01-28 04:03:04,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 503 transitions, 9411 flow [2023-01-28 04:03:05,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 503 transitions, 9101 flow, removed 110 selfloop flow, removed 8 redundant places. [2023-01-28 04:03:05,222 INFO L231 Difference]: Finished difference. Result has 180 places, 441 transitions, 7806 flow [2023-01-28 04:03:05,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=5478, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7806, PETRI_PLACES=180, PETRI_TRANSITIONS=441} [2023-01-28 04:03:05,223 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 158 predicate places. [2023-01-28 04:03:05,223 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 441 transitions, 7806 flow [2023-01-28 04:03:05,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:05,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:05,224 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:05,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 04:03:05,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:05,430 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 04:03:05,430 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:05,430 INFO L85 PathProgramCache]: Analyzing trace with hash -341483624, now seen corresponding path program 10 times [2023-01-28 04:03:05,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:05,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216148511] [2023-01-28 04:03:05,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:05,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:05,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:05,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:05,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:05,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216148511] [2023-01-28 04:03:05,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216148511] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:05,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356675362] [2023-01-28 04:03:05,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:03:05,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:05,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:05,518 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 04:03:05,541 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 04:03:05,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:03:05,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:05,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:05,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:05,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:05,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:05,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356675362] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:05,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:05,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 04:03:05,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592218788] [2023-01-28 04:03:05,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:05,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:03:05,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:05,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:03:05,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:03:05,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:05,719 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 441 transitions, 7806 flow. Second operand has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:05,719 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:05,719 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:05,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:06,614 INFO L130 PetriNetUnfolder]: 1959/3913 cut-off events. [2023-01-28 04:03:06,614 INFO L131 PetriNetUnfolder]: For 124982/124982 co-relation queries the response was YES. [2023-01-28 04:03:06,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35173 conditions, 3913 events. 1959/3913 cut-off events. For 124982/124982 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 29224 event pairs, 741 based on Foata normal form. 58/3969 useless extension candidates. Maximal degree in co-relation 34056. Up to 2901 conditions per place. [2023-01-28 04:03:06,647 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 433 selfloop transitions, 119 changer transitions 1/553 dead transitions. [2023-01-28 04:03:06,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 553 transitions, 10851 flow [2023-01-28 04:03:06,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 04:03:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 04:03:06,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1613 transitions. [2023-01-28 04:03:06,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407103825136612 [2023-01-28 04:03:06,649 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1613 transitions. [2023-01-28 04:03:06,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1613 transitions. [2023-01-28 04:03:06,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:06,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1613 transitions. [2023-01-28 04:03:06,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 134.41666666666666) internal successors, (1613), 12 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:06,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:06,655 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:06,655 INFO L175 Difference]: Start difference. First operand has 180 places, 441 transitions, 7806 flow. Second operand 12 states and 1613 transitions. [2023-01-28 04:03:06,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 553 transitions, 10851 flow [2023-01-28 04:03:07,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 553 transitions, 9916 flow, removed 428 selfloop flow, removed 4 redundant places. [2023-01-28 04:03:07,309 INFO L231 Difference]: Finished difference. Result has 192 places, 496 transitions, 8474 flow [2023-01-28 04:03:07,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=6957, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8474, PETRI_PLACES=192, PETRI_TRANSITIONS=496} [2023-01-28 04:03:07,310 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 170 predicate places. [2023-01-28 04:03:07,310 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 496 transitions, 8474 flow [2023-01-28 04:03:07,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:07,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:07,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:07,316 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 04:03:07,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:07,516 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 04:03:07,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:07,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1849205694, now seen corresponding path program 11 times [2023-01-28 04:03:07,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:07,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051604158] [2023-01-28 04:03:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:07,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:07,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:07,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051604158] [2023-01-28 04:03:07,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051604158] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:07,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051171890] [2023-01-28 04:03:07,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:03:07,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:07,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:07,634 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 04:03:07,658 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 04:03:07,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:03:07,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:07,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:07,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:07,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:07,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:07,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051171890] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:07,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:07,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 04:03:07,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882026906] [2023-01-28 04:03:07,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:07,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 04:03:07,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:07,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 04:03:07,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-01-28 04:03:07,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:07,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 496 transitions, 8474 flow. Second operand has 11 states, 11 states have (on average 129.45454545454547) internal successors, (1424), 11 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:07,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:07,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:07,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:08,856 INFO L130 PetriNetUnfolder]: 2211/4356 cut-off events. [2023-01-28 04:03:08,856 INFO L131 PetriNetUnfolder]: For 152825/152825 co-relation queries the response was YES. [2023-01-28 04:03:08,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40023 conditions, 4356 events. 2211/4356 cut-off events. For 152825/152825 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32702 event pairs, 330 based on Foata normal form. 40/4394 useless extension candidates. Maximal degree in co-relation 38844. Up to 2943 conditions per place. [2023-01-28 04:03:08,887 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 437 selfloop transitions, 155 changer transitions 0/592 dead transitions. [2023-01-28 04:03:08,888 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 592 transitions, 11367 flow [2023-01-28 04:03:08,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:03:08,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:03:08,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 940 transitions. [2023-01-28 04:03:08,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44028103044496486 [2023-01-28 04:03:08,890 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 940 transitions. [2023-01-28 04:03:08,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 940 transitions. [2023-01-28 04:03:08,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:08,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 940 transitions. [2023-01-28 04:03:08,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 134.28571428571428) internal successors, (940), 7 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:08,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:08,893 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:08,893 INFO L175 Difference]: Start difference. First operand has 192 places, 496 transitions, 8474 flow. Second operand 7 states and 940 transitions. [2023-01-28 04:03:08,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 592 transitions, 11367 flow [2023-01-28 04:03:09,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 592 transitions, 11087 flow, removed 114 selfloop flow, removed 4 redundant places. [2023-01-28 04:03:09,301 INFO L231 Difference]: Finished difference. Result has 198 places, 538 transitions, 9607 flow [2023-01-28 04:03:09,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=8194, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9607, PETRI_PLACES=198, PETRI_TRANSITIONS=538} [2023-01-28 04:03:09,302 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 176 predicate places. [2023-01-28 04:03:09,302 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 538 transitions, 9607 flow [2023-01-28 04:03:09,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 129.45454545454547) internal successors, (1424), 11 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:09,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:09,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:09,308 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 04:03:09,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 04:03:09,503 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 04:03:09,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:09,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1259303408, now seen corresponding path program 12 times [2023-01-28 04:03:09,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:09,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151549761] [2023-01-28 04:03:09,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:09,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:09,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:09,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151549761] [2023-01-28 04:03:09,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151549761] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:09,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409013125] [2023-01-28 04:03:09,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:03:09,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:09,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:09,588 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 04:03:09,590 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 04:03:09,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:03:09,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:09,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:09,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:09,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:09,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409013125] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:09,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:09,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 04:03:09,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771865765] [2023-01-28 04:03:09,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:09,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:03:09,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:09,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:03:09,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:03:09,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:09,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 538 transitions, 9607 flow. Second operand has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:09,856 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:09,856 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:09,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:11,047 INFO L130 PetriNetUnfolder]: 2275/4489 cut-off events. [2023-01-28 04:03:11,047 INFO L131 PetriNetUnfolder]: For 165888/165888 co-relation queries the response was YES. [2023-01-28 04:03:11,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42483 conditions, 4489 events. 2275/4489 cut-off events. For 165888/165888 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 33895 event pairs, 522 based on Foata normal form. 20/4507 useless extension candidates. Maximal degree in co-relation 41299. Up to 2041 conditions per place. [2023-01-28 04:03:11,082 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 466 selfloop transitions, 160 changer transitions 4/630 dead transitions. [2023-01-28 04:03:11,082 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 630 transitions, 12414 flow [2023-01-28 04:03:11,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 04:03:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 04:03:11,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2257 transitions. [2023-01-28 04:03:11,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43529411764705883 [2023-01-28 04:03:11,086 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2257 transitions. [2023-01-28 04:03:11,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2257 transitions. [2023-01-28 04:03:11,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:11,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2257 transitions. [2023-01-28 04:03:11,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 132.76470588235293) internal successors, (2257), 17 states have internal predecessors, (2257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:11,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:11,093 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:11,093 INFO L175 Difference]: Start difference. First operand has 198 places, 538 transitions, 9607 flow. Second operand 17 states and 2257 transitions. [2023-01-28 04:03:11,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 630 transitions, 12414 flow [2023-01-28 04:03:11,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 630 transitions, 12259 flow, removed 57 selfloop flow, removed 2 redundant places. [2023-01-28 04:03:11,654 INFO L231 Difference]: Finished difference. Result has 220 places, 565 transitions, 10797 flow [2023-01-28 04:03:11,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=9460, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10797, PETRI_PLACES=220, PETRI_TRANSITIONS=565} [2023-01-28 04:03:11,655 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 198 predicate places. [2023-01-28 04:03:11,655 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 565 transitions, 10797 flow [2023-01-28 04:03:11,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:11,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:11,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:11,660 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 04:03:11,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:11,856 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 04:03:11,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:11,856 INFO L85 PathProgramCache]: Analyzing trace with hash -269424514, now seen corresponding path program 13 times [2023-01-28 04:03:11,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:11,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118619965] [2023-01-28 04:03:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:11,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:11,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:11,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118619965] [2023-01-28 04:03:11,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118619965] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:11,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511501623] [2023-01-28 04:03:11,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:03:11,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:11,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:11,953 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 04:03:11,963 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 04:03:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:12,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:12,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:12,156 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:12,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:12,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511501623] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:12,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:12,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 04:03:12,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529390672] [2023-01-28 04:03:12,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:12,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:03:12,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:12,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:03:12,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:03:12,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:12,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 565 transitions, 10797 flow. Second operand has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:12,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:12,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:12,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:13,644 INFO L130 PetriNetUnfolder]: 2302/4555 cut-off events. [2023-01-28 04:03:13,644 INFO L131 PetriNetUnfolder]: For 228171/228171 co-relation queries the response was YES. [2023-01-28 04:03:13,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46898 conditions, 4555 events. 2302/4555 cut-off events. For 228171/228171 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34595 event pairs, 480 based on Foata normal form. 24/4577 useless extension candidates. Maximal degree in co-relation 45534. Up to 1881 conditions per place. [2023-01-28 04:03:13,677 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 452 selfloop transitions, 198 changer transitions 18/668 dead transitions. [2023-01-28 04:03:13,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 668 transitions, 13860 flow [2023-01-28 04:03:13,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 04:03:13,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 04:03:13,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2778 transitions. [2023-01-28 04:03:13,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43372365339578456 [2023-01-28 04:03:13,681 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2778 transitions. [2023-01-28 04:03:13,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2778 transitions. [2023-01-28 04:03:13,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:13,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2778 transitions. [2023-01-28 04:03:13,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 132.28571428571428) internal successors, (2778), 21 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:13,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:13,688 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:13,689 INFO L175 Difference]: Start difference. First operand has 220 places, 565 transitions, 10797 flow. Second operand 21 states and 2778 transitions. [2023-01-28 04:03:13,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 668 transitions, 13860 flow [2023-01-28 04:03:14,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 668 transitions, 13250 flow, removed 283 selfloop flow, removed 3 redundant places. [2023-01-28 04:03:14,420 INFO L231 Difference]: Finished difference. Result has 246 places, 588 transitions, 11575 flow [2023-01-28 04:03:14,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=10187, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=11575, PETRI_PLACES=246, PETRI_TRANSITIONS=588} [2023-01-28 04:03:14,420 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 224 predicate places. [2023-01-28 04:03:14,420 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 588 transitions, 11575 flow [2023-01-28 04:03:14,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 129.13333333333333) internal successors, (1937), 15 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:14,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:14,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:14,425 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 04:03:14,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:14,621 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:03:14,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:14,622 INFO L85 PathProgramCache]: Analyzing trace with hash 176831978, now seen corresponding path program 14 times [2023-01-28 04:03:14,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:14,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73847465] [2023-01-28 04:03:14,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:14,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:14,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:14,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:14,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73847465] [2023-01-28 04:03:14,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73847465] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:14,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425738103] [2023-01-28 04:03:14,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:03:14,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:14,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:14,713 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 04:03:14,740 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 04:03:14,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:03:14,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:14,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:14,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:14,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:14,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425738103] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:14,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:14,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-28 04:03:14,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319240582] [2023-01-28 04:03:14,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:14,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:03:14,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:14,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:03:14,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:03:14,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:14,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 588 transitions, 11575 flow. Second operand has 13 states, 13 states have (on average 129.3846153846154) internal successors, (1682), 13 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:14,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:14,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:14,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:16,264 INFO L130 PetriNetUnfolder]: 2435/4768 cut-off events. [2023-01-28 04:03:16,264 INFO L131 PetriNetUnfolder]: For 311310/311310 co-relation queries the response was YES. [2023-01-28 04:03:16,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52010 conditions, 4768 events. 2435/4768 cut-off events. For 311310/311310 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 36086 event pairs, 330 based on Foata normal form. 18/4784 useless extension candidates. Maximal degree in co-relation 50697. Up to 3920 conditions per place. [2023-01-28 04:03:16,303 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 540 selfloop transitions, 139 changer transitions 4/683 dead transitions. [2023-01-28 04:03:16,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 683 transitions, 14647 flow [2023-01-28 04:03:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 04:03:16,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 04:03:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1457 transitions. [2023-01-28 04:03:16,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342771982116244 [2023-01-28 04:03:16,305 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1457 transitions. [2023-01-28 04:03:16,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1457 transitions. [2023-01-28 04:03:16,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:16,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1457 transitions. [2023-01-28 04:03:16,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 132.45454545454547) internal successors, (1457), 11 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:16,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:16,310 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:16,310 INFO L175 Difference]: Start difference. First operand has 246 places, 588 transitions, 11575 flow. Second operand 11 states and 1457 transitions. [2023-01-28 04:03:16,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 683 transitions, 14647 flow [2023-01-28 04:03:17,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 683 transitions, 14005 flow, removed 285 selfloop flow, removed 9 redundant places. [2023-01-28 04:03:17,376 INFO L231 Difference]: Finished difference. Result has 250 places, 643 transitions, 12387 flow [2023-01-28 04:03:17,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=10957, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12387, PETRI_PLACES=250, PETRI_TRANSITIONS=643} [2023-01-28 04:03:17,377 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 228 predicate places. [2023-01-28 04:03:17,377 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 643 transitions, 12387 flow [2023-01-28 04:03:17,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.3846153846154) internal successors, (1682), 13 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:17,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:17,377 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:17,382 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 04:03:17,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:17,578 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:03:17,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:17,578 INFO L85 PathProgramCache]: Analyzing trace with hash 2069382376, now seen corresponding path program 15 times [2023-01-28 04:03:17,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:17,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494387214] [2023-01-28 04:03:17,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:17,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:17,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:17,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494387214] [2023-01-28 04:03:17,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494387214] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:17,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011775106] [2023-01-28 04:03:17,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:03:17,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:17,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:17,652 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 04:03:17,665 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 04:03:17,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:03:17,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:17,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:17,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:17,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:17,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011775106] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:17,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:17,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 04:03:17,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253596565] [2023-01-28 04:03:17,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:17,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:03:17,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:17,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:03:17,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:03:17,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:17,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 643 transitions, 12387 flow. Second operand has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:17,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:17,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:17,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:19,347 INFO L130 PetriNetUnfolder]: 2524/4994 cut-off events. [2023-01-28 04:03:19,347 INFO L131 PetriNetUnfolder]: For 364898/364898 co-relation queries the response was YES. [2023-01-28 04:03:19,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56104 conditions, 4994 events. 2524/4994 cut-off events. For 364898/364898 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 38622 event pairs, 431 based on Foata normal form. 24/5016 useless extension candidates. Maximal degree in co-relation 55387. Up to 1846 conditions per place. [2023-01-28 04:03:19,394 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 475 selfloop transitions, 263 changer transitions 1/739 dead transitions. [2023-01-28 04:03:19,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 739 transitions, 15773 flow [2023-01-28 04:03:19,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 04:03:19,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 04:03:19,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2393 transitions. [2023-01-28 04:03:19,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358834244080146 [2023-01-28 04:03:19,397 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2393 transitions. [2023-01-28 04:03:19,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2393 transitions. [2023-01-28 04:03:19,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:19,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2393 transitions. [2023-01-28 04:03:19,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 132.94444444444446) internal successors, (2393), 18 states have internal predecessors, (2393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:19,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:19,404 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:19,404 INFO L175 Difference]: Start difference. First operand has 250 places, 643 transitions, 12387 flow. Second operand 18 states and 2393 transitions. [2023-01-28 04:03:19,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 739 transitions, 15773 flow [2023-01-28 04:03:20,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 739 transitions, 15381 flow, removed 158 selfloop flow, removed 4 redundant places. [2023-01-28 04:03:20,531 INFO L231 Difference]: Finished difference. Result has 270 places, 666 transitions, 13740 flow [2023-01-28 04:03:20,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=12013, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13740, PETRI_PLACES=270, PETRI_TRANSITIONS=666} [2023-01-28 04:03:20,532 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 248 predicate places. [2023-01-28 04:03:20,532 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 666 transitions, 13740 flow [2023-01-28 04:03:20,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:20,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:20,533 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:20,540 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 04:03:20,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 04:03:20,734 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:03:20,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:20,734 INFO L85 PathProgramCache]: Analyzing trace with hash 575743984, now seen corresponding path program 16 times [2023-01-28 04:03:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:20,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594789919] [2023-01-28 04:03:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:20,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:20,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:20,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594789919] [2023-01-28 04:03:20,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594789919] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:20,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893702374] [2023-01-28 04:03:20,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:03:20,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:20,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:20,815 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 04:03:20,818 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 04:03:20,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:03:20,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:20,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:20,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:20,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:20,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893702374] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:20,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:20,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 04:03:20,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132224903] [2023-01-28 04:03:20,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:20,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 04:03:20,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:20,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 04:03:20,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 04:03:20,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:20,988 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 666 transitions, 13740 flow. Second operand has 11 states, 11 states have (on average 129.45454545454547) internal successors, (1424), 11 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:20,988 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:20,988 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:20,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:22,471 INFO L130 PetriNetUnfolder]: 2527/5024 cut-off events. [2023-01-28 04:03:22,471 INFO L131 PetriNetUnfolder]: For 406053/406053 co-relation queries the response was YES. [2023-01-28 04:03:22,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58803 conditions, 5024 events. 2527/5024 cut-off events. For 406053/406053 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 39154 event pairs, 599 based on Foata normal form. 6/5028 useless extension candidates. Maximal degree in co-relation 58393. Up to 2204 conditions per place. [2023-01-28 04:03:22,513 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 543 selfloop transitions, 163 changer transitions 13/719 dead transitions. [2023-01-28 04:03:22,513 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 719 transitions, 16091 flow [2023-01-28 04:03:22,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 04:03:22,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 04:03:22,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1459 transitions. [2023-01-28 04:03:22,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43487332339791357 [2023-01-28 04:03:22,516 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1459 transitions. [2023-01-28 04:03:22,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1459 transitions. [2023-01-28 04:03:22,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:22,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1459 transitions. [2023-01-28 04:03:22,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 132.63636363636363) internal successors, (1459), 11 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:22,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:22,520 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 305.0) internal successors, (3660), 12 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:22,520 INFO L175 Difference]: Start difference. First operand has 270 places, 666 transitions, 13740 flow. Second operand 11 states and 1459 transitions. [2023-01-28 04:03:22,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 719 transitions, 16091 flow [2023-01-28 04:03:23,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 719 transitions, 15222 flow, removed 293 selfloop flow, removed 7 redundant places. [2023-01-28 04:03:23,863 INFO L231 Difference]: Finished difference. Result has 277 places, 668 transitions, 13453 flow [2023-01-28 04:03:23,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=12929, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13453, PETRI_PLACES=277, PETRI_TRANSITIONS=668} [2023-01-28 04:03:23,864 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 255 predicate places. [2023-01-28 04:03:23,864 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 668 transitions, 13453 flow [2023-01-28 04:03:23,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 129.45454545454547) internal successors, (1424), 11 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:23,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:23,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:23,870 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 04:03:24,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 04:03:24,070 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:03:24,070 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:24,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1232509748, now seen corresponding path program 17 times [2023-01-28 04:03:24,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:24,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004090389] [2023-01-28 04:03:24,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:24,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:24,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:24,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004090389] [2023-01-28 04:03:24,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004090389] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:24,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179691643] [2023-01-28 04:03:24,148 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:03:24,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:24,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:24,149 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 04:03:24,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 04:03:24,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:03:24,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:24,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:24,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:24,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179691643] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:24,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:24,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-28 04:03:24,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559901928] [2023-01-28 04:03:24,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:24,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:03:24,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:24,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:03:24,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:03:24,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:24,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 668 transitions, 13453 flow. Second operand has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:24,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:24,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:24,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:26,080 INFO L130 PetriNetUnfolder]: 2508/4962 cut-off events. [2023-01-28 04:03:26,080 INFO L131 PetriNetUnfolder]: For 388713/388713 co-relation queries the response was YES. [2023-01-28 04:03:26,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57201 conditions, 4962 events. 2508/4962 cut-off events. For 388713/388713 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 38402 event pairs, 537 based on Foata normal form. 6/4966 useless extension candidates. Maximal degree in co-relation 56787. Up to 2204 conditions per place. [2023-01-28 04:03:26,131 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 505 selfloop transitions, 218 changer transitions 12/735 dead transitions. [2023-01-28 04:03:26,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 735 transitions, 15835 flow [2023-01-28 04:03:26,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 04:03:26,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 04:03:26,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2380 transitions. [2023-01-28 04:03:26,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335154826958106 [2023-01-28 04:03:26,134 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2380 transitions. [2023-01-28 04:03:26,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2380 transitions. [2023-01-28 04:03:26,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:26,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2380 transitions. [2023-01-28 04:03:26,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 132.22222222222223) internal successors, (2380), 18 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:26,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:26,139 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:26,139 INFO L175 Difference]: Start difference. First operand has 277 places, 668 transitions, 13453 flow. Second operand 18 states and 2380 transitions. [2023-01-28 04:03:26,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 735 transitions, 15835 flow [2023-01-28 04:03:27,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 735 transitions, 15556 flow, removed 92 selfloop flow, removed 5 redundant places. [2023-01-28 04:03:27,663 INFO L231 Difference]: Finished difference. Result has 288 places, 666 transitions, 13648 flow [2023-01-28 04:03:27,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13254, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=13648, PETRI_PLACES=288, PETRI_TRANSITIONS=666} [2023-01-28 04:03:27,664 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 266 predicate places. [2023-01-28 04:03:27,664 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 666 transitions, 13648 flow [2023-01-28 04:03:27,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.23076923076923) internal successors, (1680), 13 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:27,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:27,665 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:27,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 04:03:27,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 04:03:27,869 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:03:27,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:27,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1433210416, now seen corresponding path program 18 times [2023-01-28 04:03:27,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:27,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622104128] [2023-01-28 04:03:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:27,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:27,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:27,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622104128] [2023-01-28 04:03:27,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622104128] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:27,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504980473] [2023-01-28 04:03:27,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:03:27,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:27,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:27,949 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 04:03:27,949 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 04:03:28,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:03:28,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:28,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:28,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:28,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:28,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:28,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504980473] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:28,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:28,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 04:03:28,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071536569] [2023-01-28 04:03:28,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:28,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:03:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:28,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:03:28,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:03:28,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:28,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 666 transitions, 13648 flow. Second operand has 12 states, 12 states have (on average 129.58333333333334) internal successors, (1555), 12 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:28,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:28,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:28,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:29,665 INFO L130 PetriNetUnfolder]: 2530/5002 cut-off events. [2023-01-28 04:03:29,666 INFO L131 PetriNetUnfolder]: For 308599/308599 co-relation queries the response was YES. [2023-01-28 04:03:29,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54607 conditions, 5002 events. 2530/5002 cut-off events. For 308599/308599 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 38746 event pairs, 718 based on Foata normal form. 36/5036 useless extension candidates. Maximal degree in co-relation 54193. Up to 2990 conditions per place. [2023-01-28 04:03:29,818 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 486 selfloop transitions, 253 changer transitions 4/743 dead transitions. [2023-01-28 04:03:29,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 743 transitions, 16419 flow [2023-01-28 04:03:29,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 04:03:29,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 04:03:29,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1747 transitions. [2023-01-28 04:03:29,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406052963430013 [2023-01-28 04:03:29,821 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1747 transitions. [2023-01-28 04:03:29,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1747 transitions. [2023-01-28 04:03:29,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:29,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1747 transitions. [2023-01-28 04:03:29,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 134.3846153846154) internal successors, (1747), 13 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:29,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:29,824 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 305.0) internal successors, (4270), 14 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:29,824 INFO L175 Difference]: Start difference. First operand has 288 places, 666 transitions, 13648 flow. Second operand 13 states and 1747 transitions. [2023-01-28 04:03:29,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 743 transitions, 16419 flow [2023-01-28 04:03:30,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 743 transitions, 16001 flow, removed 32 selfloop flow, removed 18 redundant places. [2023-01-28 04:03:30,757 INFO L231 Difference]: Finished difference. Result has 284 places, 678 transitions, 14401 flow [2023-01-28 04:03:30,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13270, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=14401, PETRI_PLACES=284, PETRI_TRANSITIONS=678} [2023-01-28 04:03:30,758 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 262 predicate places. [2023-01-28 04:03:30,758 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 678 transitions, 14401 flow [2023-01-28 04:03:30,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.58333333333334) internal successors, (1555), 12 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:30,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:30,758 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:30,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-28 04:03:30,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:30,959 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:03:30,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:30,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1176200413, now seen corresponding path program 19 times [2023-01-28 04:03:30,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:30,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164328131] [2023-01-28 04:03:30,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:30,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:03:32,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:32,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164328131] [2023-01-28 04:03:32,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164328131] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:32,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048896937] [2023-01-28 04:03:32,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:03:32,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:32,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:32,291 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:03:32,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 04:03:32,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:32,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 04:03:32,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:32,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:03:32,597 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-28 04:03:32,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 36 [2023-01-28 04:03:32,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-01-28 04:03:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:32,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:32,655 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1098 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1098) c_~f_inv~0.base) (+ (* c_~counter~0 4) c_~f_inv~0.offset)) 0)) is different from false [2023-01-28 04:03:32,669 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:03:32,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 49 [2023-01-28 04:03:32,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-01-28 04:03:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-01-28 04:03:32,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048896937] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:32,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:32,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 20 [2023-01-28 04:03:32,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578549319] [2023-01-28 04:03:32,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:32,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 04:03:32,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:32,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 04:03:32,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=357, Unknown=1, NotChecked=38, Total=462 [2023-01-28 04:03:32,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 305 [2023-01-28 04:03:32,771 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 678 transitions, 14401 flow. Second operand has 22 states, 22 states have (on average 85.95454545454545) internal successors, (1891), 22 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:32,771 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:32,771 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 305 [2023-01-28 04:03:32,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:35,065 INFO L130 PetriNetUnfolder]: 2753/5476 cut-off events. [2023-01-28 04:03:35,065 INFO L131 PetriNetUnfolder]: For 341172/341215 co-relation queries the response was YES. [2023-01-28 04:03:35,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59958 conditions, 5476 events. 2753/5476 cut-off events. For 341172/341215 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 43428 event pairs, 330 based on Foata normal form. 43/5501 useless extension candidates. Maximal degree in co-relation 59544. Up to 4456 conditions per place. [2023-01-28 04:03:35,155 INFO L137 encePairwiseOnDemand]: 292/305 looper letters, 642 selfloop transitions, 205 changer transitions 26/881 dead transitions. [2023-01-28 04:03:35,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 881 transitions, 19945 flow [2023-01-28 04:03:35,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:03:35,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:03:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1778 transitions. [2023-01-28 04:03:35,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29147540983606557 [2023-01-28 04:03:35,158 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1778 transitions. [2023-01-28 04:03:35,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1778 transitions. [2023-01-28 04:03:35,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:35,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1778 transitions. [2023-01-28 04:03:35,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 88.9) internal successors, (1778), 20 states have internal predecessors, (1778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:35,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:35,165 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:35,165 INFO L175 Difference]: Start difference. First operand has 284 places, 678 transitions, 14401 flow. Second operand 20 states and 1778 transitions. [2023-01-28 04:03:35,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 881 transitions, 19945 flow [2023-01-28 04:03:36,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 881 transitions, 19216 flow, removed 84 selfloop flow, removed 13 redundant places. [2023-01-28 04:03:36,659 INFO L231 Difference]: Finished difference. Result has 297 places, 792 transitions, 16765 flow [2023-01-28 04:03:36,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=13828, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=16765, PETRI_PLACES=297, PETRI_TRANSITIONS=792} [2023-01-28 04:03:36,660 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 275 predicate places. [2023-01-28 04:03:36,660 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 792 transitions, 16765 flow [2023-01-28 04:03:36,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 85.95454545454545) internal successors, (1891), 22 states have internal predecessors, (1891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:36,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:36,661 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:36,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 04:03:36,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:36,867 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:03:36,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:36,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1264890525, now seen corresponding path program 20 times [2023-01-28 04:03:36,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:36,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402555702] [2023-01-28 04:03:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:36,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:36,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:36,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402555702] [2023-01-28 04:03:36,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402555702] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:36,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792689861] [2023-01-28 04:03:36,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:03:36,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:36,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:36,981 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:03:37,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 04:03:37,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:03:37,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:37,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:37,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:37,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:37,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792689861] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:37,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:37,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 04:03:37,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206011394] [2023-01-28 04:03:37,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:37,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:03:37,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:37,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:03:37,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:03:37,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:37,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 792 transitions, 16765 flow. Second operand has 13 states, 13 states have (on average 129.6153846153846) internal successors, (1685), 13 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:37,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:37,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:37,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:39,436 INFO L130 PetriNetUnfolder]: 2799/5666 cut-off events. [2023-01-28 04:03:39,436 INFO L131 PetriNetUnfolder]: For 335386/335386 co-relation queries the response was YES. [2023-01-28 04:03:39,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62010 conditions, 5666 events. 2799/5666 cut-off events. For 335386/335386 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 45877 event pairs, 506 based on Foata normal form. 28/5692 useless extension candidates. Maximal degree in co-relation 61586. Up to 2949 conditions per place. [2023-01-28 04:03:39,493 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 707 selfloop transitions, 234 changer transitions 70/1011 dead transitions. [2023-01-28 04:03:39,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 1011 transitions, 22779 flow [2023-01-28 04:03:39,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 04:03:39,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 04:03:39,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2239 transitions. [2023-01-28 04:03:39,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43182256509161043 [2023-01-28 04:03:39,496 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2239 transitions. [2023-01-28 04:03:39,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2239 transitions. [2023-01-28 04:03:39,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:39,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2239 transitions. [2023-01-28 04:03:39,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 131.7058823529412) internal successors, (2239), 17 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:39,501 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:39,501 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:39,501 INFO L175 Difference]: Start difference. First operand has 297 places, 792 transitions, 16765 flow. Second operand 17 states and 2239 transitions. [2023-01-28 04:03:39,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 1011 transitions, 22779 flow [2023-01-28 04:03:41,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1011 transitions, 22435 flow, removed 167 selfloop flow, removed 3 redundant places. [2023-01-28 04:03:41,103 INFO L231 Difference]: Finished difference. Result has 314 places, 882 transitions, 19149 flow [2023-01-28 04:03:41,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=16178, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=782, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=19149, PETRI_PLACES=314, PETRI_TRANSITIONS=882} [2023-01-28 04:03:41,104 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 292 predicate places. [2023-01-28 04:03:41,104 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 882 transitions, 19149 flow [2023-01-28 04:03:41,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.6153846153846) internal successors, (1685), 13 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:41,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:41,105 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:41,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 04:03:41,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-28 04:03:41,311 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:03:41,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:41,311 INFO L85 PathProgramCache]: Analyzing trace with hash -622098217, now seen corresponding path program 21 times [2023-01-28 04:03:41,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:41,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578164569] [2023-01-28 04:03:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:41,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:41,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:41,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578164569] [2023-01-28 04:03:41,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578164569] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:41,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405753563] [2023-01-28 04:03:41,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:03:41,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:41,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:41,405 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:03:41,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 04:03:41,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 04:03:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:41,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:41,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:41,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:41,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405753563] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:41,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:41,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-28 04:03:41,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303514246] [2023-01-28 04:03:41,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:41,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:03:41,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:03:41,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:03:41,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:41,746 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 882 transitions, 19149 flow. Second operand has 13 states, 13 states have (on average 129.3846153846154) internal successors, (1682), 13 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:41,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:41,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:41,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:43,676 INFO L130 PetriNetUnfolder]: 2623/5346 cut-off events. [2023-01-28 04:03:43,676 INFO L131 PetriNetUnfolder]: For 345214/345214 co-relation queries the response was YES. [2023-01-28 04:03:43,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60402 conditions, 5346 events. 2623/5346 cut-off events. For 345214/345214 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 43180 event pairs, 70 based on Foata normal form. 28/5372 useless extension candidates. Maximal degree in co-relation 60227. Up to 2226 conditions per place. [2023-01-28 04:03:43,733 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 632 selfloop transitions, 334 changer transitions 9/975 dead transitions. [2023-01-28 04:03:43,733 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 975 transitions, 22888 flow [2023-01-28 04:03:43,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 04:03:43,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 04:03:43,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2763 transitions. [2023-01-28 04:03:43,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4313817330210773 [2023-01-28 04:03:43,735 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2763 transitions. [2023-01-28 04:03:43,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2763 transitions. [2023-01-28 04:03:43,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:43,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2763 transitions. [2023-01-28 04:03:43,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 131.57142857142858) internal successors, (2763), 21 states have internal predecessors, (2763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:43,742 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:43,743 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 305.0) internal successors, (6710), 22 states have internal predecessors, (6710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:43,743 INFO L175 Difference]: Start difference. First operand has 314 places, 882 transitions, 19149 flow. Second operand 21 states and 2763 transitions. [2023-01-28 04:03:43,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 975 transitions, 22888 flow [2023-01-28 04:03:45,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 975 transitions, 21926 flow, removed 453 selfloop flow, removed 2 redundant places. [2023-01-28 04:03:45,676 INFO L231 Difference]: Finished difference. Result has 335 places, 900 transitions, 19619 flow [2023-01-28 04:03:45,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=18032, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=19619, PETRI_PLACES=335, PETRI_TRANSITIONS=900} [2023-01-28 04:03:45,677 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 313 predicate places. [2023-01-28 04:03:45,677 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 900 transitions, 19619 flow [2023-01-28 04:03:45,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 129.3846153846154) internal successors, (1682), 13 states have internal predecessors, (1682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:45,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:45,677 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:45,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 04:03:45,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-01-28 04:03:45,877 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:03:45,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:45,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1826008881, now seen corresponding path program 22 times [2023-01-28 04:03:45,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:45,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750012427] [2023-01-28 04:03:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:45,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:45,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:45,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:45,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750012427] [2023-01-28 04:03:45,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750012427] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:45,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962580548] [2023-01-28 04:03:45,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:03:45,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:45,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:45,986 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:03:45,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 04:03:46,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:03:46,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:46,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:46,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:46,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:46,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962580548] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:46,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:46,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 04:03:46,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144400518] [2023-01-28 04:03:46,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:46,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:03:46,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:46,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:03:46,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:03:46,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:46,197 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 900 transitions, 19619 flow. Second operand has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:46,197 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:46,197 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:46,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:48,297 INFO L130 PetriNetUnfolder]: 2719/5561 cut-off events. [2023-01-28 04:03:48,297 INFO L131 PetriNetUnfolder]: For 366921/366921 co-relation queries the response was YES. [2023-01-28 04:03:48,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62917 conditions, 5561 events. 2719/5561 cut-off events. For 366921/366921 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 45288 event pairs, 84 based on Foata normal form. 64/5623 useless extension candidates. Maximal degree in co-relation 62738. Up to 2077 conditions per place. [2023-01-28 04:03:48,355 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 630 selfloop transitions, 392 changer transitions 7/1029 dead transitions. [2023-01-28 04:03:48,355 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1029 transitions, 24666 flow [2023-01-28 04:03:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:03:48,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:03:48,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2647 transitions. [2023-01-28 04:03:48,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339344262295082 [2023-01-28 04:03:48,358 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2647 transitions. [2023-01-28 04:03:48,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2647 transitions. [2023-01-28 04:03:48,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:48,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2647 transitions. [2023-01-28 04:03:48,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 132.35) internal successors, (2647), 20 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:48,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:48,365 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:48,365 INFO L175 Difference]: Start difference. First operand has 335 places, 900 transitions, 19619 flow. Second operand 20 states and 2647 transitions. [2023-01-28 04:03:48,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1029 transitions, 24666 flow [2023-01-28 04:03:50,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1029 transitions, 23945 flow, removed 312 selfloop flow, removed 5 redundant places. [2023-01-28 04:03:50,426 INFO L231 Difference]: Finished difference. Result has 357 places, 942 transitions, 21812 flow [2023-01-28 04:03:50,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=18720, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=893, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=21812, PETRI_PLACES=357, PETRI_TRANSITIONS=942} [2023-01-28 04:03:50,428 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 335 predicate places. [2023-01-28 04:03:50,428 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 942 transitions, 21812 flow [2023-01-28 04:03:50,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:50,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:50,428 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:50,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-01-28 04:03:50,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:50,633 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:03:50,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1058366777, now seen corresponding path program 23 times [2023-01-28 04:03:50,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:50,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295189808] [2023-01-28 04:03:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:50,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:50,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295189808] [2023-01-28 04:03:50,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295189808] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:50,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862528922] [2023-01-28 04:03:50,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:03:50,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:50,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:50,717 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:03:50,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 04:03:50,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 04:03:50,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:03:50,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:50,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:50,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:50,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:50,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862528922] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:03:50,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:03:50,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-28 04:03:50,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985360363] [2023-01-28 04:03:50,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:03:50,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:03:50,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:03:50,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:03:50,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:03:50,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-28 04:03:50,955 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 942 transitions, 21812 flow. Second operand has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:50,955 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:03:50,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-28 04:03:50,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:03:52,975 INFO L130 PetriNetUnfolder]: 2625/5329 cut-off events. [2023-01-28 04:03:52,975 INFO L131 PetriNetUnfolder]: For 336676/336676 co-relation queries the response was YES. [2023-01-28 04:03:53,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59565 conditions, 5329 events. 2625/5329 cut-off events. For 336676/336676 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 42402 event pairs, 214 based on Foata normal form. 52/5379 useless extension candidates. Maximal degree in co-relation 59377. Up to 3508 conditions per place. [2023-01-28 04:03:53,036 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 645 selfloop transitions, 345 changer transitions 1/991 dead transitions. [2023-01-28 04:03:53,036 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 991 transitions, 24447 flow [2023-01-28 04:03:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 04:03:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 04:03:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1855 transitions. [2023-01-28 04:03:53,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344262295081967 [2023-01-28 04:03:53,038 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1855 transitions. [2023-01-28 04:03:53,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1855 transitions. [2023-01-28 04:03:53,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:03:53,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1855 transitions. [2023-01-28 04:03:53,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 132.5) internal successors, (1855), 14 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:53,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:53,042 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 305.0) internal successors, (4575), 15 states have internal predecessors, (4575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:53,042 INFO L175 Difference]: Start difference. First operand has 357 places, 942 transitions, 21812 flow. Second operand 14 states and 1855 transitions. [2023-01-28 04:03:53,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 991 transitions, 24447 flow [2023-01-28 04:03:55,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 991 transitions, 23553 flow, removed 368 selfloop flow, removed 10 redundant places. [2023-01-28 04:03:55,406 INFO L231 Difference]: Finished difference. Result has 360 places, 938 transitions, 21586 flow [2023-01-28 04:03:55,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=20537, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=934, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=21586, PETRI_PLACES=360, PETRI_TRANSITIONS=938} [2023-01-28 04:03:55,407 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 338 predicate places. [2023-01-28 04:03:55,407 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 938 transitions, 21586 flow [2023-01-28 04:03:55,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 129.33333333333334) internal successors, (1552), 12 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:03:55,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:03:55,407 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:03:55,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-28 04:03:55,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:55,608 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:03:55,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:03:55,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1367206724, now seen corresponding path program 24 times [2023-01-28 04:03:55,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:03:55,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275744545] [2023-01-28 04:03:55,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:03:55,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:03:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:03:55,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 04:03:55,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:03:55,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275744545] [2023-01-28 04:03:55,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275744545] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:03:55,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904851993] [2023-01-28 04:03:55,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:03:55,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:03:55,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:03:55,877 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:03:55,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 04:03:56,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:03:56,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:03:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 04:03:56,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:03:56,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:03:56,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:03:56,191 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-01-28 04:03:56,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2023-01-28 04:03:56,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 04:03:56,270 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 04:03:56,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-01-28 04:03:56,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:03:56,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:03:56,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:03:56,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 04:03:56,560 INFO L321 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2023-01-28 04:03:56,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 29 [2023-01-28 04:03:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:03:56,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:03:56,786 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1317 (Array Int Int)) (~f_inv~0.base Int) (v_~counter~0_242 Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1317))) (let ((.cse1 (select .cse3 c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* v_~counter~0_242 4)))) (.cse2 (select (select .cse3 ~f_inv~0.base) (+ (* c_~counter~0 4) c_~f_inv~0.offset)))) (or (= .cse0 0) (< v_~counter~0_242 0) (<= c_~n_inv~0 .cse0) (not (= (select .cse1 (+ c_~f~0.offset (* .cse2 4))) c_~counter~0)) (< .cse0 0) (< .cse2 0) (<= c_~n~0 v_~counter~0_242) (<= c_~n~0 .cse2)))))) is different from false [2023-01-28 04:03:57,213 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:03:57,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 151 [2023-01-28 04:03:57,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:03:57,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 8414 treesize of output 7931 [2023-01-28 04:03:57,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:03:57,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 2330 treesize of output 2205 [2023-01-28 04:03:58,131 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:03:58,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 1829 treesize of output 1845 [2023-01-28 04:03:58,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:03:58,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 2016 treesize of output 1611 [2023-01-28 04:03:58,745 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 04:16:16,104 WARN L222 SmtUtils]: Spent 13.82s on a formula simplification. DAG size of input: 1142 DAG size of output: 1245 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-01-28 04:16:21,364 WARN L238 SmtUtils]: Removed 1 from assertion stack [2023-01-28 04:16:21,366 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 04:16:21,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-01-28 04:16:21,391 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 04:16:21,391 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 04:16:21,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:16:21,572 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 23 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-74-8-4-6-4-7-4-7-4-6-4-6-4-6-4-5-2-4-2-3-2-2-2-2-1 context. [2023-01-28 04:16:21,576 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 04:16:21,576 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 04:16:21,577 INFO L445 BasicCegarLoop]: Path program histogram: [24, 3, 3, 2, 1, 1, 1, 1] [2023-01-28 04:16:21,581 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 04:16:21,581 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 04:16:21,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 04:16:21 BasicIcfg [2023-01-28 04:16:21,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 04:16:21,588 INFO L158 Benchmark]: Toolchain (without parser) took 829541.24ms. Allocated memory was 408.9MB in the beginning and 2.5GB in the end (delta: 2.1GB). Free memory was 369.8MB in the beginning and 897.2MB in the end (delta: -527.4MB). Peak memory consumption was 1.7GB. Max. memory is 16.0GB. [2023-01-28 04:16:21,589 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 04:16:21,589 INFO L158 Benchmark]: CACSL2BoogieTranslator took 287.14ms. Allocated memory is still 408.9MB. Free memory was 369.8MB in the beginning and 358.0MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 04:16:21,589 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.07ms. Allocated memory is still 408.9MB. Free memory was 358.0MB in the beginning and 355.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 04:16:21,589 INFO L158 Benchmark]: Boogie Preprocessor took 38.08ms. Allocated memory is still 408.9MB. Free memory was 355.9MB in the beginning and 354.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 04:16:21,590 INFO L158 Benchmark]: RCFGBuilder took 647.63ms. Allocated memory is still 408.9MB. Free memory was 354.1MB in the beginning and 319.0MB in the end (delta: 35.1MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. [2023-01-28 04:16:21,590 INFO L158 Benchmark]: TraceAbstraction took 828503.25ms. Allocated memory was 408.9MB in the beginning and 2.5GB in the end (delta: 2.1GB). Free memory was 318.5MB in the beginning and 897.2MB in the end (delta: -578.7MB). Peak memory consumption was 1.7GB. Max. memory is 16.0GB. [2023-01-28 04:16:21,591 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 287.14ms. Allocated memory is still 408.9MB. Free memory was 369.8MB in the beginning and 358.0MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 59.07ms. Allocated memory is still 408.9MB. Free memory was 358.0MB in the beginning and 355.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.08ms. Allocated memory is still 408.9MB. Free memory was 355.9MB in the beginning and 354.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 647.63ms. Allocated memory is still 408.9MB. Free memory was 354.1MB in the beginning and 319.0MB in the end (delta: 35.1MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. * TraceAbstraction took 828503.25ms. Allocated memory was 408.9MB in the beginning and 2.5GB in the end (delta: 2.1GB). Free memory was 318.5MB in the beginning and 897.2MB in the end (delta: -578.7MB). Peak memory consumption was 1.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.8s, 139 PlacesBefore, 22 PlacesAfterwards, 145 TransitionsBefore, 19 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 7 FixpointIterations, 100 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 20 TrivialYvCompositions, 4 ConcurrentYvCompositions, 9 ChoiceCompositions, 150 TotalNumberOfCompositions, 553 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 530, independent: 520, independent conditional: 0, independent unconditional: 520, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 263, independent: 258, independent conditional: 0, independent unconditional: 258, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 530, independent: 262, independent conditional: 0, independent unconditional: 262, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 263, unknown conditional: 0, unknown unconditional: 263] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 23 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-74-8-4-6-4-7-4-7-4-6-4-6-4-6-4-5-2-4-2-3-2-2-2-2-1 context. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 23 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-74-8-4-6-4-7-4-7-4-6-4-6-4-6-4-5-2-4-2-3-2-2-2-2-1 context. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 23 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∧-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-74-8-4-6-4-7-4-7-4-6-4-6-4-6-4-5-2-4-2-3-2-2-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 163 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 828.4s, OverallIterations: 36, TraceHistogramMax: 2, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 53.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.9s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1990 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1990 mSDsluCounter, 270 SdHoareTripleChecker+Invalid, 4.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 90 IncrementalHoareTripleChecker+Unchecked, 164 mSDsCounter, 258 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8320 IncrementalHoareTripleChecker+Invalid, 8669 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 258 mSolverCounterUnsat, 106 mSDtfsCounter, 8320 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1591 GetRequests, 1008 SyntacticMatches, 66 SemanticMatches, 517 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 2466 ImplicationChecksByTransitivity, 8.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21812occurred in iteration=34, InterpolantAutomatonStates: 409, 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: 0.4s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 13.5s InterpolantComputationTime, 1249 NumberOfCodeBlocks, 1221 NumberOfCodeBlocksAsserted, 85 NumberOfCheckSat, 1692 ConstructedInterpolants, 18 QuantifiedInterpolants, 5815 SizeOfPredicates, 124 NumberOfNonLiveVariables, 6201 ConjunctsInSsa, 232 ConjunctsInUnsatCore, 89 InterpolantComputations, 9 PerfectInterpolantSequences, 402/569 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