/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 21:31:22,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 21:31:22,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 21:31:22,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 21:31:22,451 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 21:31:22,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 21:31:22,453 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 21:31:22,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 21:31:22,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 21:31:22,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 21:31:22,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 21:31:22,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 21:31:22,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 21:31:22,457 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 21:31:22,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 21:31:22,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 21:31:22,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 21:31:22,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 21:31:22,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 21:31:22,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 21:31:22,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 21:31:22,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 21:31:22,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 21:31:22,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 21:31:22,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-27 21:31:22,468 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 21:31:22,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 21:31:22,469 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 21:31:22,470 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 21:31:22,470 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 21:31:22,470 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 21:31:22,471 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 21:31:22,471 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 21:31:22,471 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 21:31:22,471 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 21:31:22,472 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 21:31:22,475 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 [2023-01-27 21:31:22,486 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 21:31:22,486 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 21:31:22,487 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 21:31:22,487 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 21:31:22,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 21:31:22,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 21:31:22,487 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 21:31:22,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 21:31:22,487 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 21:31:22,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 21:31:22,488 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 21:31:22,489 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 21:31:22,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:31:22,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 21:31:22,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 21:31:22,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 21:31:22,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 21:31:22,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 21:31:22,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 21:31:22,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 21:31:22,489 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 21:31:22,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 21:31:22,657 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 21:31:22,659 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 21:31:22,660 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 21:31:22,660 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 21:31:22,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-01-27 21:31:23,606 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 21:31:23,830 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 21:31:23,831 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-fun.wvr.c [2023-01-27 21:31:23,836 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb9ed60d6/a3176b453f1a419eb4aba16c77fe9c7b/FLAG732de8f34 [2023-01-27 21:31:23,852 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bb9ed60d6/a3176b453f1a419eb4aba16c77fe9c7b [2023-01-27 21:31:23,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 21:31:23,856 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 21:31:23,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 21:31:23,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 21:31:23,862 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 21:31:23,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:31:23" (1/1) ... [2023-01-27 21:31:23,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e00ebf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:23, skipping insertion in model container [2023-01-27 21:31:23,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 09:31:23" (1/1) ... [2023-01-27 21:31:23,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 21:31:23,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 21:31:23,977 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] [2023-01-27 21:31:23,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:31:23,988 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 21:31:24,001 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] [2023-01-27 21:31:24,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 21:31:24,008 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:31:24,008 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 21:31:24,012 INFO L208 MainTranslator]: Completed translation [2023-01-27 21:31:24,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24 WrapperNode [2023-01-27 21:31:24,012 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 21:31:24,013 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 21:31:24,013 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 21:31:24,013 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 21:31:24,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (1/1) ... [2023-01-27 21:31:24,023 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (1/1) ... [2023-01-27 21:31:24,037 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 198 [2023-01-27 21:31:24,038 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 21:31:24,038 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 21:31:24,038 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 21:31:24,038 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 21:31:24,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (1/1) ... [2023-01-27 21:31:24,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (1/1) ... [2023-01-27 21:31:24,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (1/1) ... [2023-01-27 21:31:24,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (1/1) ... [2023-01-27 21:31:24,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (1/1) ... [2023-01-27 21:31:24,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (1/1) ... [2023-01-27 21:31:24,054 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (1/1) ... [2023-01-27 21:31:24,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (1/1) ... [2023-01-27 21:31:24,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 21:31:24,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 21:31:24,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 21:31:24,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 21:31:24,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (1/1) ... [2023-01-27 21:31:24,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 21:31:24,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:24,078 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) [2023-01-27 21:31:24,080 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 [2023-01-27 21:31:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 21:31:24,104 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 21:31:24,104 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 21:31:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 21:31:24,105 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 21:31:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 21:31:24,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 21:31:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 21:31:24,106 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 21:31:24,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 21:31:24,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-27 21:31:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 21:31:24,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 21:31:24,109 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 21:31:24,110 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 21:31:24,111 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 21:31:24,190 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 21:31:24,191 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 21:31:24,444 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 21:31:24,546 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 21:31:24,546 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-27 21:31:24,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:31:24 BoogieIcfgContainer [2023-01-27 21:31:24,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 21:31:24,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 21:31:24,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 21:31:24,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 21:31:24,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 09:31:23" (1/3) ... [2023-01-27 21:31:24,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178bce34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:31:24, skipping insertion in model container [2023-01-27 21:31:24,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 09:31:24" (2/3) ... [2023-01-27 21:31:24,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@178bce34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 09:31:24, skipping insertion in model container [2023-01-27 21:31:24,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 09:31:24" (3/3) ... [2023-01-27 21:31:24,553 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2023-01-27 21:31:24,564 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 21:31:24,564 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 21:31:24,564 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 21:31:24,600 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-27 21:31:24,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 155 transitions, 326 flow [2023-01-27 21:31:24,662 INFO L130 PetriNetUnfolder]: 13/153 cut-off events. [2023-01-27 21:31:24,662 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:31:24,665 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. [2023-01-27 21:31:24,666 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 155 transitions, 326 flow [2023-01-27 21:31:24,669 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 145 transitions, 302 flow [2023-01-27 21:31:24,671 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 21:31:24,677 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 139 places, 145 transitions, 302 flow [2023-01-27 21:31:24,679 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 139 places, 145 transitions, 302 flow [2023-01-27 21:31:24,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 145 transitions, 302 flow [2023-01-27 21:31:24,721 INFO L130 PetriNetUnfolder]: 13/145 cut-off events. [2023-01-27 21:31:24,721 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:31:24,721 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. [2023-01-27 21:31:24,722 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-27 21:31:28,401 INFO L134 LiptonReduction]: Checked pairs total: 553 [2023-01-27 21:31:28,401 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-01-27 21:31:28,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 21:31:28,430 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2ae9462b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 21:31:28,430 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-27 21:31:28,435 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2023-01-27 21:31:28,435 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-27 21:31:28,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:28,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:28,436 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:28,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash -511726821, now seen corresponding path program 1 times [2023-01-27 21:31:28,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:28,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228632341] [2023-01-27 21:31:28,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:28,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:28,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:31:28,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:28,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228632341] [2023-01-27 21:31:28,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228632341] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:31:28,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:31:28,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 21:31:28,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559269298] [2023-01-27 21:31:28,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:31:28,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 21:31:28,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:28,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 21:31:28,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 21:31:28,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 305 [2023-01-27 21:31:28,787 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) [2023-01-27 21:31:28,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:28,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 305 [2023-01-27 21:31:28,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:28,836 INFO L130 PetriNetUnfolder]: 67/118 cut-off events. [2023-01-27 21:31:28,837 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-27 21:31:28,837 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. [2023-01-27 21:31:28,838 INFO L137 encePairwiseOnDemand]: 301/305 looper letters, 23 selfloop transitions, 3 changer transitions 1/29 dead transitions. [2023-01-27 21:31:28,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-01-27 21:31:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 21:31:28,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 21:31:28,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-01-27 21:31:28,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47978142076502733 [2023-01-27 21:31:28,849 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-01-27 21:31:28,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-01-27 21:31:28,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:28,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-01-27 21:31:28,854 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) [2023-01-27 21:31:28,858 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) [2023-01-27 21:31:28,858 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) [2023-01-27 21:31:28,859 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 439 transitions. [2023-01-27 21:31:28,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-01-27 21:31:28,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-27 21:31:28,863 INFO L231 Difference]: Finished difference. Result has 21 places, 21 transitions, 61 flow [2023-01-27 21:31:28,864 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} [2023-01-27 21:31:28,866 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-01-27 21:31:28,866 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 21 transitions, 61 flow [2023-01-27 21:31:28,866 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) [2023-01-27 21:31:28,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:28,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:28,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 21:31:28,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:28,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:28,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1737231503, now seen corresponding path program 1 times [2023-01-27 21:31:28,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:28,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027265231] [2023-01-27 21:31:28,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:28,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:31:28,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:28,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027265231] [2023-01-27 21:31:28,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027265231] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:31:28,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:31:28,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:31:28,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010991294] [2023-01-27 21:31:28,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:31:28,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:31:28,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:28,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:31:28,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:31:28,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:28,946 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) [2023-01-27 21:31:28,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:28,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:28,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:29,036 INFO L130 PetriNetUnfolder]: 94/179 cut-off events. [2023-01-27 21:31:29,036 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-01-27 21:31:29,036 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. [2023-01-27 21:31:29,037 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 34 selfloop transitions, 4 changer transitions 8/46 dead transitions. [2023-01-27 21:31:29,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 46 transitions, 223 flow [2023-01-27 21:31:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:31:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:31:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 678 transitions. [2023-01-27 21:31:29,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44459016393442624 [2023-01-27 21:31:29,040 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 678 transitions. [2023-01-27 21:31:29,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 678 transitions. [2023-01-27 21:31:29,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:29,041 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 678 transitions. [2023-01-27 21:31:29,042 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) [2023-01-27 21:31:29,044 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) [2023-01-27 21:31:29,045 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) [2023-01-27 21:31:29,045 INFO L175 Difference]: Start difference. First operand has 21 places, 21 transitions, 61 flow. Second operand 5 states and 678 transitions. [2023-01-27 21:31:29,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 46 transitions, 223 flow [2023-01-27 21:31:29,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 46 transitions, 218 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:31:29,046 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 85 flow [2023-01-27 21:31:29,047 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} [2023-01-27 21:31:29,047 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 5 predicate places. [2023-01-27 21:31:29,047 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 85 flow [2023-01-27 21:31:29,048 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) [2023-01-27 21:31:29,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:29,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:29,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 21:31:29,048 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:29,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:29,049 INFO L85 PathProgramCache]: Analyzing trace with hash -940242461, now seen corresponding path program 1 times [2023-01-27 21:31:29,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:29,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613764784] [2023-01-27 21:31:29,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:29,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:29,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:31:29,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:29,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613764784] [2023-01-27 21:31:29,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613764784] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:29,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250487311] [2023-01-27 21:31:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:29,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:29,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:29,134 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) [2023-01-27 21:31:29,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 21:31:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:29,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:29,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:31:29,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 21:31:29,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250487311] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:31:29,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 21:31:29,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2023-01-27 21:31:29,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125009851] [2023-01-27 21:31:29,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:31:29,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:31:29,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:29,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:31:29,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:31:29,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 305 [2023-01-27 21:31:29,322 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) [2023-01-27 21:31:29,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:29,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 305 [2023-01-27 21:31:29,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:29,381 INFO L130 PetriNetUnfolder]: 91/206 cut-off events. [2023-01-27 21:31:29,381 INFO L131 PetriNetUnfolder]: For 234/256 co-relation queries the response was YES. [2023-01-27 21:31:29,381 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. [2023-01-27 21:31:29,382 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 20 selfloop transitions, 2 changer transitions 23/47 dead transitions. [2023-01-27 21:31:29,382 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 47 transitions, 239 flow [2023-01-27 21:31:29,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:31:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:31:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 605 transitions. [2023-01-27 21:31:29,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39672131147540984 [2023-01-27 21:31:29,383 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 605 transitions. [2023-01-27 21:31:29,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 605 transitions. [2023-01-27 21:31:29,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:29,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 605 transitions. [2023-01-27 21:31:29,385 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) [2023-01-27 21:31:29,386 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) [2023-01-27 21:31:29,387 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) [2023-01-27 21:31:29,387 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 85 flow. Second operand 5 states and 605 transitions. [2023-01-27 21:31:29,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 47 transitions, 239 flow [2023-01-27 21:31:29,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 230 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-27 21:31:29,389 INFO L231 Difference]: Finished difference. Result has 31 places, 24 transitions, 98 flow [2023-01-27 21:31:29,389 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} [2023-01-27 21:31:29,389 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 9 predicate places. [2023-01-27 21:31:29,389 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 24 transitions, 98 flow [2023-01-27 21:31:29,390 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) [2023-01-27 21:31:29,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:29,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:29,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-27 21:31:29,594 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 [2023-01-27 21:31:29,595 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:29,595 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:29,595 INFO L85 PathProgramCache]: Analyzing trace with hash 166324188, now seen corresponding path program 1 times [2023-01-27 21:31:29,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:29,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714093108] [2023-01-27 21:31:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:29,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:29,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:31:29,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:29,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714093108] [2023-01-27 21:31:29,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714093108] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:31:29,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:31:29,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:31:29,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372587729] [2023-01-27 21:31:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:31:29,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:31:29,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:31:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:31:29,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:29,674 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) [2023-01-27 21:31:29,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:29,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:29,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:29,774 INFO L130 PetriNetUnfolder]: 114/218 cut-off events. [2023-01-27 21:31:29,775 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2023-01-27 21:31:29,775 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. [2023-01-27 21:31:29,776 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 38 selfloop transitions, 7 changer transitions 10/55 dead transitions. [2023-01-27 21:31:29,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 55 transitions, 335 flow [2023-01-27 21:31:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 21:31:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 21:31:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 810 transitions. [2023-01-27 21:31:29,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-01-27 21:31:29,778 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 810 transitions. [2023-01-27 21:31:29,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 810 transitions. [2023-01-27 21:31:29,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:29,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 810 transitions. [2023-01-27 21:31:29,780 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) [2023-01-27 21:31:29,782 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) [2023-01-27 21:31:29,782 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) [2023-01-27 21:31:29,782 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 98 flow. Second operand 6 states and 810 transitions. [2023-01-27 21:31:29,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 55 transitions, 335 flow [2023-01-27 21:31:29,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 317 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-27 21:31:29,784 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 150 flow [2023-01-27 21:31:29,784 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} [2023-01-27 21:31:29,785 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 14 predicate places. [2023-01-27 21:31:29,785 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 150 flow [2023-01-27 21:31:29,785 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) [2023-01-27 21:31:29,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:29,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:29,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 21:31:29,786 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:29,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1772606940, now seen corresponding path program 2 times [2023-01-27 21:31:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:29,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977282884] [2023-01-27 21:31:29,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:29,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:31:29,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:29,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977282884] [2023-01-27 21:31:29,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977282884] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:31:29,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:31:29,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:31:29,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855487987] [2023-01-27 21:31:29,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:31:29,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:31:29,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:29,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:31:29,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:31:29,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:29,840 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) [2023-01-27 21:31:29,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:29,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:29,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:29,919 INFO L130 PetriNetUnfolder]: 117/224 cut-off events. [2023-01-27 21:31:29,919 INFO L131 PetriNetUnfolder]: For 346/346 co-relation queries the response was YES. [2023-01-27 21:31:29,920 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. [2023-01-27 21:31:29,921 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 45 selfloop transitions, 9 changer transitions 1/55 dead transitions. [2023-01-27 21:31:29,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 55 transitions, 371 flow [2023-01-27 21:31:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:31:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:31:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 683 transitions. [2023-01-27 21:31:29,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4478688524590164 [2023-01-27 21:31:29,923 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 683 transitions. [2023-01-27 21:31:29,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 683 transitions. [2023-01-27 21:31:29,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:29,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 683 transitions. [2023-01-27 21:31:29,924 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) [2023-01-27 21:31:29,925 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) [2023-01-27 21:31:29,926 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) [2023-01-27 21:31:29,926 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 150 flow. Second operand 5 states and 683 transitions. [2023-01-27 21:31:29,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 55 transitions, 371 flow [2023-01-27 21:31:29,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 55 transitions, 341 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-01-27 21:31:29,928 INFO L231 Difference]: Finished difference. Result has 39 places, 33 transitions, 185 flow [2023-01-27 21:31:29,928 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} [2023-01-27 21:31:29,928 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 17 predicate places. [2023-01-27 21:31:29,928 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 33 transitions, 185 flow [2023-01-27 21:31:29,929 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) [2023-01-27 21:31:29,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:29,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:29,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 21:31:29,929 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:29,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:29,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1182769632, now seen corresponding path program 1 times [2023-01-27 21:31:29,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:29,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923666429] [2023-01-27 21:31:29,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:29,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:29,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:31:29,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:29,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923666429] [2023-01-27 21:31:29,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923666429] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:29,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424941601] [2023-01-27 21:31:29,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:29,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:29,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:29,981 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) [2023-01-27 21:31:29,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 21:31:30,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:30,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:30,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:31:30,078 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-27 21:31:30,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424941601] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:31:30,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-27 21:31:30,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-01-27 21:31:30,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806800116] [2023-01-27 21:31:30,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:31:30,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 21:31:30,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:30,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 21:31:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-27 21:31:30,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 305 [2023-01-27 21:31:30,080 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) [2023-01-27 21:31:30,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:30,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 305 [2023-01-27 21:31:30,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:30,132 INFO L130 PetriNetUnfolder]: 119/249 cut-off events. [2023-01-27 21:31:30,132 INFO L131 PetriNetUnfolder]: For 633/648 co-relation queries the response was YES. [2023-01-27 21:31:30,132 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. [2023-01-27 21:31:30,133 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 28 selfloop transitions, 2 changer transitions 10/44 dead transitions. [2023-01-27 21:31:30,133 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 44 transitions, 303 flow [2023-01-27 21:31:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 21:31:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 21:31:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 486 transitions. [2023-01-27 21:31:30,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983606557377049 [2023-01-27 21:31:30,135 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 486 transitions. [2023-01-27 21:31:30,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 486 transitions. [2023-01-27 21:31:30,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:30,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 486 transitions. [2023-01-27 21:31:30,136 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) [2023-01-27 21:31:30,137 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) [2023-01-27 21:31:30,137 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) [2023-01-27 21:31:30,137 INFO L175 Difference]: Start difference. First operand has 39 places, 33 transitions, 185 flow. Second operand 4 states and 486 transitions. [2023-01-27 21:31:30,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 44 transitions, 303 flow [2023-01-27 21:31:30,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 296 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 21:31:30,139 INFO L231 Difference]: Finished difference. Result has 43 places, 34 transitions, 202 flow [2023-01-27 21:31:30,139 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} [2023-01-27 21:31:30,140 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 21 predicate places. [2023-01-27 21:31:30,140 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 34 transitions, 202 flow [2023-01-27 21:31:30,140 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) [2023-01-27 21:31:30,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:30,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:30,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:30,345 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 [2023-01-27 21:31:30,345 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:30,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:30,346 INFO L85 PathProgramCache]: Analyzing trace with hash -919263952, now seen corresponding path program 1 times [2023-01-27 21:31:30,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:30,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181345520] [2023-01-27 21:31:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:30,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:30,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:30,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181345520] [2023-01-27 21:31:30,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181345520] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:31:30,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:31:30,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:31:30,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889841467] [2023-01-27 21:31:30,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:31:30,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:31:30,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:30,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:31:30,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:31:30,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:30,415 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) [2023-01-27 21:31:30,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:30,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:30,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:30,492 INFO L130 PetriNetUnfolder]: 105/203 cut-off events. [2023-01-27 21:31:30,492 INFO L131 PetriNetUnfolder]: For 383/383 co-relation queries the response was YES. [2023-01-27 21:31:30,493 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. [2023-01-27 21:31:30,493 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 35 selfloop transitions, 9 changer transitions 8/52 dead transitions. [2023-01-27 21:31:30,494 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 381 flow [2023-01-27 21:31:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:31:30,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:31:30,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-01-27 21:31:30,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44524590163934424 [2023-01-27 21:31:30,495 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-01-27 21:31:30,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-01-27 21:31:30,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:30,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-01-27 21:31:30,497 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) [2023-01-27 21:31:30,499 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) [2023-01-27 21:31:30,500 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) [2023-01-27 21:31:30,500 INFO L175 Difference]: Start difference. First operand has 43 places, 34 transitions, 202 flow. Second operand 5 states and 679 transitions. [2023-01-27 21:31:30,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 381 flow [2023-01-27 21:31:30,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 365 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-01-27 21:31:30,502 INFO L231 Difference]: Finished difference. Result has 45 places, 34 transitions, 211 flow [2023-01-27 21:31:30,502 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} [2023-01-27 21:31:30,502 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-01-27 21:31:30,502 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 34 transitions, 211 flow [2023-01-27 21:31:30,503 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) [2023-01-27 21:31:30,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:30,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:30,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 21:31:30,503 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:30,503 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:30,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1922624012, now seen corresponding path program 2 times [2023-01-27 21:31:30,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:30,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811213807] [2023-01-27 21:31:30,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:30,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:30,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:30,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:30,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811213807] [2023-01-27 21:31:30,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811213807] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:30,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200494822] [2023-01-27 21:31:30,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:31:30,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:30,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:30,557 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) [2023-01-27 21:31:30,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 21:31:30,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:31:30,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:30,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 21:31:30,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:30,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:30,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200494822] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:30,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:30,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-27 21:31:30,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125678709] [2023-01-27 21:31:30,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:30,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 21:31:30,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:30,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 21:31:30,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-27 21:31:30,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:30,687 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) [2023-01-27 21:31:30,687 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:30,687 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:30,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:30,779 INFO L130 PetriNetUnfolder]: 104/195 cut-off events. [2023-01-27 21:31:30,779 INFO L131 PetriNetUnfolder]: For 436/436 co-relation queries the response was YES. [2023-01-27 21:31:30,780 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. [2023-01-27 21:31:30,780 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 43 selfloop transitions, 8 changer transitions 1/52 dead transitions. [2023-01-27 21:31:30,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 402 flow [2023-01-27 21:31:30,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:31:30,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:31:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 675 transitions. [2023-01-27 21:31:30,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4426229508196721 [2023-01-27 21:31:30,782 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 675 transitions. [2023-01-27 21:31:30,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 675 transitions. [2023-01-27 21:31:30,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:30,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 675 transitions. [2023-01-27 21:31:30,784 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) [2023-01-27 21:31:30,785 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) [2023-01-27 21:31:30,785 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) [2023-01-27 21:31:30,785 INFO L175 Difference]: Start difference. First operand has 45 places, 34 transitions, 211 flow. Second operand 5 states and 675 transitions. [2023-01-27 21:31:30,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 402 flow [2023-01-27 21:31:30,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 372 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-27 21:31:30,788 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 233 flow [2023-01-27 21:31:30,788 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} [2023-01-27 21:31:30,790 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 25 predicate places. [2023-01-27 21:31:30,791 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 233 flow [2023-01-27 21:31:30,791 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) [2023-01-27 21:31:30,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:30,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:30,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:30,997 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 [2023-01-27 21:31:30,997 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:30,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:30,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1388345664, now seen corresponding path program 1 times [2023-01-27 21:31:30,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:30,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035435660] [2023-01-27 21:31:30,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:30,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:31,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:31,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035435660] [2023-01-27 21:31:31,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035435660] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:31,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690865947] [2023-01-27 21:31:31,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:31,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:31,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:31,057 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) [2023-01-27 21:31:31,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 21:31:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:31,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 21:31:31,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:31,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:31,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690865947] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:31,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:31,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-27 21:31:31,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297984389] [2023-01-27 21:31:31,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:31,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-27 21:31:31,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:31,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-27 21:31:31,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-27 21:31:31,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:31,215 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) [2023-01-27 21:31:31,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:31,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:31,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:31,301 INFO L130 PetriNetUnfolder]: 112/209 cut-off events. [2023-01-27 21:31:31,301 INFO L131 PetriNetUnfolder]: For 474/474 co-relation queries the response was YES. [2023-01-27 21:31:31,302 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. [2023-01-27 21:31:31,303 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 46 selfloop transitions, 11 changer transitions 1/58 dead transitions. [2023-01-27 21:31:31,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 437 flow [2023-01-27 21:31:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:31:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:31:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 679 transitions. [2023-01-27 21:31:31,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44524590163934424 [2023-01-27 21:31:31,305 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 679 transitions. [2023-01-27 21:31:31,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 679 transitions. [2023-01-27 21:31:31,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:31,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 679 transitions. [2023-01-27 21:31:31,306 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) [2023-01-27 21:31:31,307 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) [2023-01-27 21:31:31,308 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) [2023-01-27 21:31:31,308 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 233 flow. Second operand 5 states and 679 transitions. [2023-01-27 21:31:31,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 437 flow [2023-01-27 21:31:31,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 424 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-27 21:31:31,310 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 273 flow [2023-01-27 21:31:31,310 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} [2023-01-27 21:31:31,310 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 29 predicate places. [2023-01-27 21:31:31,310 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 273 flow [2023-01-27 21:31:31,311 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) [2023-01-27 21:31:31,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:31,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:31,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:31,516 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 [2023-01-27 21:31:31,516 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:31,516 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:31,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1906605968, now seen corresponding path program 2 times [2023-01-27 21:31:31,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:31,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933136063] [2023-01-27 21:31:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:31,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:31,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:31,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933136063] [2023-01-27 21:31:31,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933136063] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:31,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634208388] [2023-01-27 21:31:31,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:31:31,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:31,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:31,564 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) [2023-01-27 21:31:31,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-27 21:31:31,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:31:31,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:31,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-27 21:31:31,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:31,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:31,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634208388] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:31,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:31,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-01-27 21:31:31,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971529585] [2023-01-27 21:31:31,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:31,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-27 21:31:31,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:31,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-27 21:31:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-01-27 21:31:31,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:31,701 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) [2023-01-27 21:31:31,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:31,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:31,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:31,823 INFO L130 PetriNetUnfolder]: 128/237 cut-off events. [2023-01-27 21:31:31,823 INFO L131 PetriNetUnfolder]: For 733/733 co-relation queries the response was YES. [2023-01-27 21:31:31,824 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. [2023-01-27 21:31:31,825 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 54 selfloop transitions, 16 changer transitions 1/71 dead transitions. [2023-01-27 21:31:31,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 544 flow [2023-01-27 21:31:31,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:31:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:31:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1075 transitions. [2023-01-27 21:31:31,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405737704918033 [2023-01-27 21:31:31,827 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1075 transitions. [2023-01-27 21:31:31,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1075 transitions. [2023-01-27 21:31:31,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:31,828 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1075 transitions. [2023-01-27 21:31:31,829 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) [2023-01-27 21:31:31,831 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) [2023-01-27 21:31:31,832 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) [2023-01-27 21:31:31,832 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 273 flow. Second operand 8 states and 1075 transitions. [2023-01-27 21:31:31,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 544 flow [2023-01-27 21:31:31,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 71 transitions, 530 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-27 21:31:31,835 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 326 flow [2023-01-27 21:31:31,835 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} [2023-01-27 21:31:31,835 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 36 predicate places. [2023-01-27 21:31:31,836 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 326 flow [2023-01-27 21:31:31,836 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) [2023-01-27 21:31:31,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:31,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:31,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:32,043 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 [2023-01-27 21:31:32,043 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:32,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash 694440902, now seen corresponding path program 3 times [2023-01-27 21:31:32,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:32,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577262756] [2023-01-27 21:31:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:32,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:32,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:32,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:32,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577262756] [2023-01-27 21:31:32,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577262756] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:31:32,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:31:32,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:31:32,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674585212] [2023-01-27 21:31:32,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:31:32,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:31:32,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:32,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:31:32,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:31:32,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:32,098 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) [2023-01-27 21:31:32,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:32,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:32,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:32,169 INFO L130 PetriNetUnfolder]: 118/217 cut-off events. [2023-01-27 21:31:32,169 INFO L131 PetriNetUnfolder]: For 909/909 co-relation queries the response was YES. [2023-01-27 21:31:32,169 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. [2023-01-27 21:31:32,170 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 13 changer transitions 1/52 dead transitions. [2023-01-27 21:31:32,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 52 transitions, 470 flow [2023-01-27 21:31:32,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:31:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:31:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 672 transitions. [2023-01-27 21:31:32,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44065573770491806 [2023-01-27 21:31:32,172 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 672 transitions. [2023-01-27 21:31:32,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 672 transitions. [2023-01-27 21:31:32,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:32,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 672 transitions. [2023-01-27 21:31:32,174 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) [2023-01-27 21:31:32,175 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) [2023-01-27 21:31:32,176 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) [2023-01-27 21:31:32,176 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 326 flow. Second operand 5 states and 672 transitions. [2023-01-27 21:31:32,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 52 transitions, 470 flow [2023-01-27 21:31:32,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 436 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-01-27 21:31:32,179 INFO L231 Difference]: Finished difference. Result has 57 places, 40 transitions, 304 flow [2023-01-27 21:31:32,179 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} [2023-01-27 21:31:32,179 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2023-01-27 21:31:32,179 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 40 transitions, 304 flow [2023-01-27 21:31:32,180 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) [2023-01-27 21:31:32,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:32,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:32,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-01-27 21:31:32,185 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:32,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:32,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1217746086, now seen corresponding path program 3 times [2023-01-27 21:31:32,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:32,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538258584] [2023-01-27 21:31:32,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:32,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:32,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:32,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538258584] [2023-01-27 21:31:32,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538258584] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 21:31:32,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 21:31:32,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-27 21:31:32,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176016477] [2023-01-27 21:31:32,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 21:31:32,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 21:31:32,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 21:31:32,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 21:31:32,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:32,238 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) [2023-01-27 21:31:32,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:32,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:32,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:32,299 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2023-01-27 21:31:32,300 INFO L131 PetriNetUnfolder]: For 759/759 co-relation queries the response was YES. [2023-01-27 21:31:32,300 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. [2023-01-27 21:31:32,301 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 12 changer transitions 1/51 dead transitions. [2023-01-27 21:31:32,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 51 transitions, 446 flow [2023-01-27 21:31:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 21:31:32,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 21:31:32,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 672 transitions. [2023-01-27 21:31:32,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44065573770491806 [2023-01-27 21:31:32,303 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 672 transitions. [2023-01-27 21:31:32,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 672 transitions. [2023-01-27 21:31:32,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:32,303 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 672 transitions. [2023-01-27 21:31:32,304 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) [2023-01-27 21:31:32,306 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) [2023-01-27 21:31:32,306 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) [2023-01-27 21:31:32,306 INFO L175 Difference]: Start difference. First operand has 57 places, 40 transitions, 304 flow. Second operand 5 states and 672 transitions. [2023-01-27 21:31:32,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 51 transitions, 446 flow [2023-01-27 21:31:32,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 405 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-01-27 21:31:32,309 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 275 flow [2023-01-27 21:31:32,309 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} [2023-01-27 21:31:32,309 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 31 predicate places. [2023-01-27 21:31:32,309 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 275 flow [2023-01-27 21:31:32,310 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) [2023-01-27 21:31:32,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:32,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:32,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-01-27 21:31:32,310 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:32,310 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash -813997192, now seen corresponding path program 1 times [2023-01-27 21:31:32,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:32,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673270723] [2023-01-27 21:31:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:32,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:31:32,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:32,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673270723] [2023-01-27 21:31:32,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673270723] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:32,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455113242] [2023-01-27 21:31:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:32,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:32,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:32,469 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) [2023-01-27 21:31:32,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-27 21:31:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:32,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:31:32,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:32,652 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 [2023-01-27 21:31:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:32,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:32,675 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 [2023-01-27 21:31:32,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:32,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455113242] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:32,709 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:32,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2023-01-27 21:31:32,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441741842] [2023-01-27 21:31:32,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:32,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:31:32,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:32,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:31:32,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:31:32,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 305 [2023-01-27 21:31:32,712 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) [2023-01-27 21:31:32,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:32,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 305 [2023-01-27 21:31:32,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:32,898 INFO L130 PetriNetUnfolder]: 265/474 cut-off events. [2023-01-27 21:31:32,898 INFO L131 PetriNetUnfolder]: For 1330/1375 co-relation queries the response was YES. [2023-01-27 21:31:32,898 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. [2023-01-27 21:31:32,900 INFO L137 encePairwiseOnDemand]: 298/305 looper letters, 63 selfloop transitions, 31 changer transitions 5/105 dead transitions. [2023-01-27 21:31:32,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 105 transitions, 836 flow [2023-01-27 21:31:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:31:32,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:31:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 899 transitions. [2023-01-27 21:31:32,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3684426229508197 [2023-01-27 21:31:32,902 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 899 transitions. [2023-01-27 21:31:32,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 899 transitions. [2023-01-27 21:31:32,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:32,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 899 transitions. [2023-01-27 21:31:32,904 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) [2023-01-27 21:31:32,906 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) [2023-01-27 21:31:32,906 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) [2023-01-27 21:31:32,907 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 275 flow. Second operand 8 states and 899 transitions. [2023-01-27 21:31:32,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 105 transitions, 836 flow [2023-01-27 21:31:32,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 105 transitions, 760 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-01-27 21:31:32,910 INFO L231 Difference]: Finished difference. Result has 57 places, 67 transitions, 594 flow [2023-01-27 21:31:32,910 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} [2023-01-27 21:31:32,910 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 35 predicate places. [2023-01-27 21:31:32,910 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 67 transitions, 594 flow [2023-01-27 21:31:32,911 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) [2023-01-27 21:31:32,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:32,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:32,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-27 21:31:33,116 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 [2023-01-27 21:31:33,116 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:33,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:33,116 INFO L85 PathProgramCache]: Analyzing trace with hash 585031802, now seen corresponding path program 2 times [2023-01-27 21:31:33,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:33,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909683233] [2023-01-27 21:31:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:33,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:33,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:31:33,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:33,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909683233] [2023-01-27 21:31:33,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909683233] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:33,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367798775] [2023-01-27 21:31:33,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:31:33,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:33,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:33,245 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) [2023-01-27 21:31:33,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-27 21:31:33,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:31:33,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:33,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 21:31:33,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:33,437 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 [2023-01-27 21:31:33,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:33,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:33,455 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 [2023-01-27 21:31:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-27 21:31:33,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367798775] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:33,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:33,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-01-27 21:31:33,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903747875] [2023-01-27 21:31:33,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:33,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:31:33,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:33,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:31:33,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:31:33,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 305 [2023-01-27 21:31:33,489 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) [2023-01-27 21:31:33,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:33,489 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 305 [2023-01-27 21:31:33,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:33,690 INFO L130 PetriNetUnfolder]: 651/1159 cut-off events. [2023-01-27 21:31:33,691 INFO L131 PetriNetUnfolder]: For 4169/4249 co-relation queries the response was YES. [2023-01-27 21:31:33,692 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. [2023-01-27 21:31:33,696 INFO L137 encePairwiseOnDemand]: 298/305 looper letters, 83 selfloop transitions, 49 changer transitions 20/158 dead transitions. [2023-01-27 21:31:33,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 158 transitions, 1626 flow [2023-01-27 21:31:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-27 21:31:33,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-27 21:31:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 893 transitions. [2023-01-27 21:31:33,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36598360655737705 [2023-01-27 21:31:33,698 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 893 transitions. [2023-01-27 21:31:33,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 893 transitions. [2023-01-27 21:31:33,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:33,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 893 transitions. [2023-01-27 21:31:33,700 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) [2023-01-27 21:31:33,702 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) [2023-01-27 21:31:33,702 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) [2023-01-27 21:31:33,702 INFO L175 Difference]: Start difference. First operand has 57 places, 67 transitions, 594 flow. Second operand 8 states and 893 transitions. [2023-01-27 21:31:33,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 158 transitions, 1626 flow [2023-01-27 21:31:33,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 158 transitions, 1568 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-01-27 21:31:33,709 INFO L231 Difference]: Finished difference. Result has 68 places, 105 transitions, 1193 flow [2023-01-27 21:31:33,710 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} [2023-01-27 21:31:33,710 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 46 predicate places. [2023-01-27 21:31:33,710 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 105 transitions, 1193 flow [2023-01-27 21:31:33,710 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) [2023-01-27 21:31:33,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:33,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:33,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:33,916 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 [2023-01-27 21:31:33,916 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:33,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1194162893, now seen corresponding path program 3 times [2023-01-27 21:31:33,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:33,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475080700] [2023-01-27 21:31:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:33,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:31:34,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:34,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475080700] [2023-01-27 21:31:34,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475080700] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:34,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352231343] [2023-01-27 21:31:34,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:31:34,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:34,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:34,349 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) [2023-01-27 21:31:34,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-27 21:31:34,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:31:34,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:34,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-27 21:31:34,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:34,511 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 [2023-01-27 21:31:34,540 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 [2023-01-27 21:31:34,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:31:34,659 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-27 21:31:34,659 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 [2023-01-27 21:31:34,667 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 [2023-01-27 21:31:34,789 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-27 21:31:34,789 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 [2023-01-27 21:31:34,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:31:34,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:35,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:31:35,066 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 [2023-01-27 21:31:35,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:31:35,098 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 [2023-01-27 21:31:35,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:31:35,135 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 [2023-01-27 21:31:35,153 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 [2023-01-27 21:31:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-27 21:31:39,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352231343] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:39,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:39,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-27 21:31:39,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838901654] [2023-01-27 21:31:39,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:39,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-27 21:31:39,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:39,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-27 21:31:39,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=349, Unknown=1, NotChecked=0, Total=420 [2023-01-27 21:31:39,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 305 [2023-01-27 21:31:39,742 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) [2023-01-27 21:31:39,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:39,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 305 [2023-01-27 21:31:39,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:44,314 INFO L130 PetriNetUnfolder]: 718/1290 cut-off events. [2023-01-27 21:31:44,314 INFO L131 PetriNetUnfolder]: For 6344/6426 co-relation queries the response was YES. [2023-01-27 21:31:44,318 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. [2023-01-27 21:31:44,325 INFO L137 encePairwiseOnDemand]: 297/305 looper letters, 78 selfloop transitions, 50 changer transitions 31/165 dead transitions. [2023-01-27 21:31:44,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 165 transitions, 1947 flow [2023-01-27 21:31:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-27 21:31:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-27 21:31:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 966 transitions. [2023-01-27 21:31:44,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31672131147540983 [2023-01-27 21:31:44,331 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 966 transitions. [2023-01-27 21:31:44,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 966 transitions. [2023-01-27 21:31:44,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:44,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 966 transitions. [2023-01-27 21:31:44,335 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) [2023-01-27 21:31:44,339 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) [2023-01-27 21:31:44,340 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) [2023-01-27 21:31:44,340 INFO L175 Difference]: Start difference. First operand has 68 places, 105 transitions, 1193 flow. Second operand 10 states and 966 transitions. [2023-01-27 21:31:44,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 165 transitions, 1947 flow [2023-01-27 21:31:44,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 165 transitions, 1894 flow, removed 25 selfloop flow, removed 1 redundant places. [2023-01-27 21:31:44,351 INFO L231 Difference]: Finished difference. Result has 79 places, 113 transitions, 1396 flow [2023-01-27 21:31:44,352 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} [2023-01-27 21:31:44,352 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 57 predicate places. [2023-01-27 21:31:44,353 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 113 transitions, 1396 flow [2023-01-27 21:31:44,353 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) [2023-01-27 21:31:44,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:44,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:44,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:44,577 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 [2023-01-27 21:31:44,577 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:44,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:44,578 INFO L85 PathProgramCache]: Analyzing trace with hash 888256042, now seen corresponding path program 4 times [2023-01-27 21:31:44,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:44,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997382166] [2023-01-27 21:31:44,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:44,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:44,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:44,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:44,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997382166] [2023-01-27 21:31:44,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997382166] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:44,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267010727] [2023-01-27 21:31:44,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:31:44,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:44,663 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) [2023-01-27 21:31:44,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-27 21:31:44,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:31:44,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:44,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:44,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:44,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:44,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267010727] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:44,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:44,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-27 21:31:44,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749394241] [2023-01-27 21:31:44,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:44,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:31:44,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:44,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:31:44,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:31:44,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:44,800 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) [2023-01-27 21:31:44,800 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:44,800 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:44,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:45,177 INFO L130 PetriNetUnfolder]: 877/1639 cut-off events. [2023-01-27 21:31:45,177 INFO L131 PetriNetUnfolder]: For 7648/7648 co-relation queries the response was YES. [2023-01-27 21:31:45,180 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. [2023-01-27 21:31:45,186 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 157 selfloop transitions, 105 changer transitions 23/285 dead transitions. [2023-01-27 21:31:45,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 285 transitions, 3529 flow [2023-01-27 21:31:45,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 21:31:45,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 21:31:45,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2659 transitions. [2023-01-27 21:31:45,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4359016393442623 [2023-01-27 21:31:45,191 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2659 transitions. [2023-01-27 21:31:45,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2659 transitions. [2023-01-27 21:31:45,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:45,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2659 transitions. [2023-01-27 21:31:45,195 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) [2023-01-27 21:31:45,200 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) [2023-01-27 21:31:45,200 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) [2023-01-27 21:31:45,200 INFO L175 Difference]: Start difference. First operand has 79 places, 113 transitions, 1396 flow. Second operand 20 states and 2659 transitions. [2023-01-27 21:31:45,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 285 transitions, 3529 flow [2023-01-27 21:31:45,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 285 transitions, 3259 flow, removed 115 selfloop flow, removed 5 redundant places. [2023-01-27 21:31:45,216 INFO L231 Difference]: Finished difference. Result has 103 places, 180 transitions, 2340 flow [2023-01-27 21:31:45,216 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} [2023-01-27 21:31:45,216 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 81 predicate places. [2023-01-27 21:31:45,217 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 180 transitions, 2340 flow [2023-01-27 21:31:45,217 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) [2023-01-27 21:31:45,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:45,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:45,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:45,421 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 [2023-01-27 21:31:45,421 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:45,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:45,422 INFO L85 PathProgramCache]: Analyzing trace with hash -91606092, now seen corresponding path program 5 times [2023-01-27 21:31:45,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:45,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834701342] [2023-01-27 21:31:45,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:45,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:45,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:45,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834701342] [2023-01-27 21:31:45,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834701342] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:45,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408706766] [2023-01-27 21:31:45,493 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:31:45,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:45,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:45,517 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) [2023-01-27 21:31:45,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-27 21:31:45,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:31:45,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:45,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:45,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:45,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:45,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408706766] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:45,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:45,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-27 21:31:45,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243496160] [2023-01-27 21:31:45,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:45,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:31:45,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:45,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:31:45,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:31:45,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:45,678 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) [2023-01-27 21:31:45,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:45,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:45,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:46,101 INFO L130 PetriNetUnfolder]: 776/1509 cut-off events. [2023-01-27 21:31:46,102 INFO L131 PetriNetUnfolder]: For 13435/13435 co-relation queries the response was YES. [2023-01-27 21:31:46,106 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. [2023-01-27 21:31:46,111 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 157 selfloop transitions, 95 changer transitions 1/253 dead transitions. [2023-01-27 21:31:46,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 253 transitions, 3517 flow [2023-01-27 21:31:46,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:31:46,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:31:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1876 transitions. [2023-01-27 21:31:46,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43934426229508194 [2023-01-27 21:31:46,114 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1876 transitions. [2023-01-27 21:31:46,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1876 transitions. [2023-01-27 21:31:46,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:46,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1876 transitions. [2023-01-27 21:31:46,117 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) [2023-01-27 21:31:46,120 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) [2023-01-27 21:31:46,121 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) [2023-01-27 21:31:46,121 INFO L175 Difference]: Start difference. First operand has 103 places, 180 transitions, 2340 flow. Second operand 14 states and 1876 transitions. [2023-01-27 21:31:46,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 253 transitions, 3517 flow [2023-01-27 21:31:46,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 253 transitions, 3118 flow, removed 170 selfloop flow, removed 5 redundant places. [2023-01-27 21:31:46,154 INFO L231 Difference]: Finished difference. Result has 115 places, 186 transitions, 2378 flow [2023-01-27 21:31:46,154 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} [2023-01-27 21:31:46,155 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 93 predicate places. [2023-01-27 21:31:46,155 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 186 transitions, 2378 flow [2023-01-27 21:31:46,155 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) [2023-01-27 21:31:46,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:46,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:46,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:46,360 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 [2023-01-27 21:31:46,360 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:46,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:46,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1082840516, now seen corresponding path program 6 times [2023-01-27 21:31:46,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:46,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800684841] [2023-01-27 21:31:46,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:46,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:46,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:46,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800684841] [2023-01-27 21:31:46,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800684841] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:46,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743055525] [2023-01-27 21:31:46,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:31:46,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:46,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:46,429 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) [2023-01-27 21:31:46,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-27 21:31:46,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-27 21:31:46,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:46,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:46,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:46,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:46,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743055525] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:46,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:46,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 21:31:46,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915454154] [2023-01-27 21:31:46,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:46,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:31:46,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:46,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:31:46,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:31:46,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:46,592 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) [2023-01-27 21:31:46,592 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:46,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:46,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:47,082 INFO L130 PetriNetUnfolder]: 986/1971 cut-off events. [2023-01-27 21:31:47,082 INFO L131 PetriNetUnfolder]: For 19834/19834 co-relation queries the response was YES. [2023-01-27 21:31:47,087 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. [2023-01-27 21:31:47,098 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 165 selfloop transitions, 153 changer transitions 14/332 dead transitions. [2023-01-27 21:31:47,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 332 transitions, 4449 flow [2023-01-27 21:31:47,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-27 21:31:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-27 21:31:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3045 transitions. [2023-01-27 21:31:47,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43406985032074125 [2023-01-27 21:31:47,102 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3045 transitions. [2023-01-27 21:31:47,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3045 transitions. [2023-01-27 21:31:47,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:47,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3045 transitions. [2023-01-27 21:31:47,107 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) [2023-01-27 21:31:47,112 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) [2023-01-27 21:31:47,112 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) [2023-01-27 21:31:47,113 INFO L175 Difference]: Start difference. First operand has 115 places, 186 transitions, 2378 flow. Second operand 23 states and 3045 transitions. [2023-01-27 21:31:47,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 332 transitions, 4449 flow [2023-01-27 21:31:47,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 332 transitions, 4278 flow, removed 21 selfloop flow, removed 8 redundant places. [2023-01-27 21:31:47,161 INFO L231 Difference]: Finished difference. Result has 139 places, 235 transitions, 3422 flow [2023-01-27 21:31:47,161 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} [2023-01-27 21:31:47,162 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 117 predicate places. [2023-01-27 21:31:47,162 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 235 transitions, 3422 flow [2023-01-27 21:31:47,162 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) [2023-01-27 21:31:47,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:47,162 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:47,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-27 21:31:47,367 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 [2023-01-27 21:31:47,368 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:47,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:47,368 INFO L85 PathProgramCache]: Analyzing trace with hash 549254058, now seen corresponding path program 7 times [2023-01-27 21:31:47,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:47,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935206190] [2023-01-27 21:31:47,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:47,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:47,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:47,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935206190] [2023-01-27 21:31:47,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935206190] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:47,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346374640] [2023-01-27 21:31:47,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:31:47,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:47,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:47,458 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) [2023-01-27 21:31:47,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-27 21:31:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:47,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:47,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:47,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:47,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346374640] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:47,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:47,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 21:31:47,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919043938] [2023-01-27 21:31:47,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:47,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:31:47,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:47,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:31:47,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:31:47,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:47,621 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) [2023-01-27 21:31:47,622 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:47,622 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:47,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:48,171 INFO L130 PetriNetUnfolder]: 1214/2390 cut-off events. [2023-01-27 21:31:48,171 INFO L131 PetriNetUnfolder]: For 42971/42971 co-relation queries the response was YES. [2023-01-27 21:31:48,179 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. [2023-01-27 21:31:48,189 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 239 selfloop transitions, 108 changer transitions 9/356 dead transitions. [2023-01-27 21:31:48,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 356 transitions, 5908 flow [2023-01-27 21:31:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 21:31:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 21:31:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1734 transitions. [2023-01-27 21:31:48,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4373266078184111 [2023-01-27 21:31:48,191 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1734 transitions. [2023-01-27 21:31:48,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1734 transitions. [2023-01-27 21:31:48,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:48,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1734 transitions. [2023-01-27 21:31:48,194 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) [2023-01-27 21:31:48,197 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) [2023-01-27 21:31:48,197 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) [2023-01-27 21:31:48,197 INFO L175 Difference]: Start difference. First operand has 139 places, 235 transitions, 3422 flow. Second operand 13 states and 1734 transitions. [2023-01-27 21:31:48,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 356 transitions, 5908 flow [2023-01-27 21:31:48,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 356 transitions, 5526 flow, removed 161 selfloop flow, removed 7 redundant places. [2023-01-27 21:31:48,317 INFO L231 Difference]: Finished difference. Result has 149 places, 297 transitions, 4606 flow [2023-01-27 21:31:48,317 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} [2023-01-27 21:31:48,318 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 127 predicate places. [2023-01-27 21:31:48,318 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 297 transitions, 4606 flow [2023-01-27 21:31:48,318 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) [2023-01-27 21:31:48,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:48,318 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:48,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:48,523 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 [2023-01-27 21:31:48,525 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:48,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:48,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1583947118, now seen corresponding path program 8 times [2023-01-27 21:31:48,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:48,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861083774] [2023-01-27 21:31:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:48,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:48,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:48,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:48,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861083774] [2023-01-27 21:31:48,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861083774] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:48,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927050451] [2023-01-27 21:31:48,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:31:48,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:48,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:48,598 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) [2023-01-27 21:31:48,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-27 21:31:48,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:31:48,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:48,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:48,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:48,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:48,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927050451] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:48,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:48,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-27 21:31:48,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835427570] [2023-01-27 21:31:48,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:48,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:31:48,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:48,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:31:48,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:31:48,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:48,833 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) [2023-01-27 21:31:48,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:48,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:48,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:49,434 INFO L130 PetriNetUnfolder]: 1393/2776 cut-off events. [2023-01-27 21:31:49,434 INFO L131 PetriNetUnfolder]: For 61073/61073 co-relation queries the response was YES. [2023-01-27 21:31:49,443 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. [2023-01-27 21:31:49,451 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 236 selfloop transitions, 196 changer transitions 8/440 dead transitions. [2023-01-27 21:31:49,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 440 transitions, 7324 flow [2023-01-27 21:31:49,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-27 21:31:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-27 21:31:49,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2012 transitions. [2023-01-27 21:31:49,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4397814207650273 [2023-01-27 21:31:49,453 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2012 transitions. [2023-01-27 21:31:49,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2012 transitions. [2023-01-27 21:31:49,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:49,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2012 transitions. [2023-01-27 21:31:49,455 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) [2023-01-27 21:31:49,458 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) [2023-01-27 21:31:49,459 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) [2023-01-27 21:31:49,459 INFO L175 Difference]: Start difference. First operand has 149 places, 297 transitions, 4606 flow. Second operand 15 states and 2012 transitions. [2023-01-27 21:31:49,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 440 transitions, 7324 flow [2023-01-27 21:31:49,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 440 transitions, 6822 flow, removed 213 selfloop flow, removed 5 redundant places. [2023-01-27 21:31:49,621 INFO L231 Difference]: Finished difference. Result has 163 places, 352 transitions, 5735 flow [2023-01-27 21:31:49,621 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} [2023-01-27 21:31:49,621 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 141 predicate places. [2023-01-27 21:31:49,621 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 352 transitions, 5735 flow [2023-01-27 21:31:49,622 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) [2023-01-27 21:31:49,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:49,622 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:49,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:49,826 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 [2023-01-27 21:31:49,826 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:49,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:49,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1724744702, now seen corresponding path program 9 times [2023-01-27 21:31:49,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:49,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594762387] [2023-01-27 21:31:49,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:49,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:49,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:49,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:49,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594762387] [2023-01-27 21:31:49,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594762387] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:49,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618536441] [2023-01-27 21:31:49,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:31:49,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:49,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:49,891 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) [2023-01-27 21:31:49,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-27 21:31:49,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:31:49,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:49,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:49,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:50,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:50,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618536441] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:50,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:50,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 21:31:50,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542149268] [2023-01-27 21:31:50,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:50,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:31:50,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:50,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:31:50,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:31:50,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:50,062 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) [2023-01-27 21:31:50,062 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:50,062 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:50,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:50,861 INFO L130 PetriNetUnfolder]: 1684/3315 cut-off events. [2023-01-27 21:31:50,862 INFO L131 PetriNetUnfolder]: For 77074/77074 co-relation queries the response was YES. [2023-01-27 21:31:50,874 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. [2023-01-27 21:31:50,883 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 363 selfloop transitions, 137 changer transitions 3/503 dead transitions. [2023-01-27 21:31:50,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 503 transitions, 9411 flow [2023-01-27 21:31:50,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:31:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:31:50,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2261 transitions. [2023-01-27 21:31:50,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4360655737704918 [2023-01-27 21:31:50,885 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2261 transitions. [2023-01-27 21:31:50,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2261 transitions. [2023-01-27 21:31:50,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:50,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2261 transitions. [2023-01-27 21:31:50,888 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) [2023-01-27 21:31:50,891 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) [2023-01-27 21:31:50,891 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) [2023-01-27 21:31:50,891 INFO L175 Difference]: Start difference. First operand has 163 places, 352 transitions, 5735 flow. Second operand 17 states and 2261 transitions. [2023-01-27 21:31:50,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 503 transitions, 9411 flow [2023-01-27 21:31:51,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 503 transitions, 9101 flow, removed 110 selfloop flow, removed 8 redundant places. [2023-01-27 21:31:51,142 INFO L231 Difference]: Finished difference. Result has 180 places, 441 transitions, 7806 flow [2023-01-27 21:31:51,142 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} [2023-01-27 21:31:51,143 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 158 predicate places. [2023-01-27 21:31:51,143 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 441 transitions, 7806 flow [2023-01-27 21:31:51,143 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) [2023-01-27 21:31:51,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:51,143 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:51,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:51,351 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 [2023-01-27 21:31:51,351 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:51,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:51,352 INFO L85 PathProgramCache]: Analyzing trace with hash -341483624, now seen corresponding path program 10 times [2023-01-27 21:31:51,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:51,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864392662] [2023-01-27 21:31:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:51,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:51,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:51,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864392662] [2023-01-27 21:31:51,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864392662] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:51,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764512964] [2023-01-27 21:31:51,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:31:51,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:51,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:51,411 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) [2023-01-27 21:31:51,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-27 21:31:51,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:31:51,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:51,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:51,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:51,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:51,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764512964] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:51,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:51,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-27 21:31:51,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835423421] [2023-01-27 21:31:51,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:51,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:31:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:31:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:31:51,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:51,563 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) [2023-01-27 21:31:51,563 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:51,563 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:51,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:52,430 INFO L130 PetriNetUnfolder]: 1959/3913 cut-off events. [2023-01-27 21:31:52,430 INFO L131 PetriNetUnfolder]: For 124982/124982 co-relation queries the response was YES. [2023-01-27 21:31:52,446 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. [2023-01-27 21:31:52,457 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 433 selfloop transitions, 119 changer transitions 1/553 dead transitions. [2023-01-27 21:31:52,457 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 553 transitions, 10851 flow [2023-01-27 21:31:52,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-27 21:31:52,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-27 21:31:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1613 transitions. [2023-01-27 21:31:52,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4407103825136612 [2023-01-27 21:31:52,459 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1613 transitions. [2023-01-27 21:31:52,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1613 transitions. [2023-01-27 21:31:52,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:52,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1613 transitions. [2023-01-27 21:31:52,461 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) [2023-01-27 21:31:52,463 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) [2023-01-27 21:31:52,463 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) [2023-01-27 21:31:52,463 INFO L175 Difference]: Start difference. First operand has 180 places, 441 transitions, 7806 flow. Second operand 12 states and 1613 transitions. [2023-01-27 21:31:52,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 553 transitions, 10851 flow [2023-01-27 21:31:52,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 553 transitions, 9916 flow, removed 428 selfloop flow, removed 4 redundant places. [2023-01-27 21:31:52,903 INFO L231 Difference]: Finished difference. Result has 192 places, 496 transitions, 8474 flow [2023-01-27 21:31:52,903 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} [2023-01-27 21:31:52,903 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 170 predicate places. [2023-01-27 21:31:52,903 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 496 transitions, 8474 flow [2023-01-27 21:31:52,904 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) [2023-01-27 21:31:52,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:52,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:52,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:53,108 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 [2023-01-27 21:31:53,108 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:53,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:53,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1849205694, now seen corresponding path program 11 times [2023-01-27 21:31:53,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:53,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304208906] [2023-01-27 21:31:53,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:53,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:53,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:53,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:53,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304208906] [2023-01-27 21:31:53,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304208906] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:53,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712134032] [2023-01-27 21:31:53,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:31:53,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:53,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:53,197 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) [2023-01-27 21:31:53,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-27 21:31:53,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:31:53,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:53,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:53,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:53,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:53,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:53,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712134032] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:53,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:53,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-27 21:31:53,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136545693] [2023-01-27 21:31:53,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:53,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:31:53,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:53,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:31:53,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:31:53,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:53,379 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) [2023-01-27 21:31:53,379 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:53,379 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:53,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:54,299 INFO L130 PetriNetUnfolder]: 2211/4356 cut-off events. [2023-01-27 21:31:54,299 INFO L131 PetriNetUnfolder]: For 152825/152825 co-relation queries the response was YES. [2023-01-27 21:31:54,318 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. [2023-01-27 21:31:54,331 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 437 selfloop transitions, 155 changer transitions 0/592 dead transitions. [2023-01-27 21:31:54,331 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 592 transitions, 11367 flow [2023-01-27 21:31:54,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 21:31:54,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 21:31:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 940 transitions. [2023-01-27 21:31:54,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44028103044496486 [2023-01-27 21:31:54,332 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 940 transitions. [2023-01-27 21:31:54,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 940 transitions. [2023-01-27 21:31:54,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:54,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 940 transitions. [2023-01-27 21:31:54,334 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) [2023-01-27 21:31:54,335 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) [2023-01-27 21:31:54,335 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) [2023-01-27 21:31:54,335 INFO L175 Difference]: Start difference. First operand has 192 places, 496 transitions, 8474 flow. Second operand 7 states and 940 transitions. [2023-01-27 21:31:54,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 592 transitions, 11367 flow [2023-01-27 21:31:54,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 592 transitions, 11087 flow, removed 114 selfloop flow, removed 4 redundant places. [2023-01-27 21:31:54,824 INFO L231 Difference]: Finished difference. Result has 198 places, 538 transitions, 9607 flow [2023-01-27 21:31:54,824 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} [2023-01-27 21:31:54,825 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 176 predicate places. [2023-01-27 21:31:54,825 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 538 transitions, 9607 flow [2023-01-27 21:31:54,825 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) [2023-01-27 21:31:54,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:54,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:54,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:55,030 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 [2023-01-27 21:31:55,030 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:55,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:55,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1259303408, now seen corresponding path program 12 times [2023-01-27 21:31:55,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:55,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098387957] [2023-01-27 21:31:55,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:55,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:55,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:55,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:55,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098387957] [2023-01-27 21:31:55,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098387957] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:55,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148312353] [2023-01-27 21:31:55,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:31:55,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:55,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:55,105 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) [2023-01-27 21:31:55,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-27 21:31:55,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:31:55,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:31:55,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:55,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:55,322 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:55,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:55,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148312353] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:55,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:55,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-27 21:31:55,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472382062] [2023-01-27 21:31:55,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:55,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:31:55,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:55,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:31:55,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:31:55,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:55,343 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) [2023-01-27 21:31:55,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:55,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:55,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:56,480 INFO L130 PetriNetUnfolder]: 2275/4489 cut-off events. [2023-01-27 21:31:56,480 INFO L131 PetriNetUnfolder]: For 165888/165888 co-relation queries the response was YES. [2023-01-27 21:31:56,501 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. [2023-01-27 21:31:56,515 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 466 selfloop transitions, 160 changer transitions 4/630 dead transitions. [2023-01-27 21:31:56,515 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 630 transitions, 12414 flow [2023-01-27 21:31:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:31:56,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:31:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2257 transitions. [2023-01-27 21:31:56,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43529411764705883 [2023-01-27 21:31:56,518 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2257 transitions. [2023-01-27 21:31:56,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2257 transitions. [2023-01-27 21:31:56,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:56,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2257 transitions. [2023-01-27 21:31:56,520 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) [2023-01-27 21:31:56,522 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) [2023-01-27 21:31:56,522 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) [2023-01-27 21:31:56,522 INFO L175 Difference]: Start difference. First operand has 198 places, 538 transitions, 9607 flow. Second operand 17 states and 2257 transitions. [2023-01-27 21:31:56,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 630 transitions, 12414 flow [2023-01-27 21:31:57,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 630 transitions, 12259 flow, removed 57 selfloop flow, removed 2 redundant places. [2023-01-27 21:31:57,098 INFO L231 Difference]: Finished difference. Result has 220 places, 565 transitions, 10797 flow [2023-01-27 21:31:57,098 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} [2023-01-27 21:31:57,099 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 198 predicate places. [2023-01-27 21:31:57,099 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 565 transitions, 10797 flow [2023-01-27 21:31:57,099 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) [2023-01-27 21:31:57,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:57,099 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:57,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-27 21:31:57,304 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 [2023-01-27 21:31:57,304 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:31:57,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:31:57,305 INFO L85 PathProgramCache]: Analyzing trace with hash -269424514, now seen corresponding path program 13 times [2023-01-27 21:31:57,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:31:57,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742808923] [2023-01-27 21:31:57,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:31:57,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:31:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:57,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:57,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:31:57,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742808923] [2023-01-27 21:31:57,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742808923] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:31:57,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49435269] [2023-01-27 21:31:57,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:31:57,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:31:57,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:31:57,393 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) [2023-01-27 21:31:57,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-27 21:31:57,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:31:57,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:31:57,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:31:57,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:57,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:31:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:31:57,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49435269] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:31:57,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:31:57,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-27 21:31:57,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101229754] [2023-01-27 21:31:57,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:31:57,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-27 21:31:57,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:31:57,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-27 21:31:57,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-01-27 21:31:57,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:31:57,633 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) [2023-01-27 21:31:57,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:31:57,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:31:57,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:31:58,872 INFO L130 PetriNetUnfolder]: 2302/4555 cut-off events. [2023-01-27 21:31:58,872 INFO L131 PetriNetUnfolder]: For 228171/228171 co-relation queries the response was YES. [2023-01-27 21:31:58,894 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. [2023-01-27 21:31:58,909 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 452 selfloop transitions, 198 changer transitions 18/668 dead transitions. [2023-01-27 21:31:58,909 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 668 transitions, 13860 flow [2023-01-27 21:31:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 21:31:58,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 21:31:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2778 transitions. [2023-01-27 21:31:58,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43372365339578456 [2023-01-27 21:31:58,912 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2778 transitions. [2023-01-27 21:31:58,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2778 transitions. [2023-01-27 21:31:58,912 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:31:58,912 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2778 transitions. [2023-01-27 21:31:58,914 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) [2023-01-27 21:31:58,917 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) [2023-01-27 21:31:58,917 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) [2023-01-27 21:31:58,917 INFO L175 Difference]: Start difference. First operand has 220 places, 565 transitions, 10797 flow. Second operand 21 states and 2778 transitions. [2023-01-27 21:31:58,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 668 transitions, 13860 flow [2023-01-27 21:31:59,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 668 transitions, 13250 flow, removed 283 selfloop flow, removed 3 redundant places. [2023-01-27 21:31:59,821 INFO L231 Difference]: Finished difference. Result has 246 places, 588 transitions, 11575 flow [2023-01-27 21:31:59,821 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} [2023-01-27 21:31:59,821 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 224 predicate places. [2023-01-27 21:31:59,821 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 588 transitions, 11575 flow [2023-01-27 21:31:59,822 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) [2023-01-27 21:31:59,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:31:59,822 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:31:59,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-27 21:32:00,026 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 [2023-01-27 21:32:00,026 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:32:00,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:32:00,027 INFO L85 PathProgramCache]: Analyzing trace with hash 176831978, now seen corresponding path program 14 times [2023-01-27 21:32:00,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:32:00,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979347538] [2023-01-27 21:32:00,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:32:00,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:32:00,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:00,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:32:00,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979347538] [2023-01-27 21:32:00,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979347538] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:32:00,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953825396] [2023-01-27 21:32:00,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:32:00,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:32:00,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:32:00,111 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) [2023-01-27 21:32:00,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-27 21:32:00,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:32:00,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:32:00,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:32:00,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:32:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:00,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:32:00,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:00,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953825396] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:32:00,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:32:00,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-27 21:32:00,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662042517] [2023-01-27 21:32:00,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:32:00,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:32:00,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:32:00,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:32:00,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:32:00,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:32:00,289 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) [2023-01-27 21:32:00,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:32:00,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:32:00,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:32:01,553 INFO L130 PetriNetUnfolder]: 2435/4768 cut-off events. [2023-01-27 21:32:01,553 INFO L131 PetriNetUnfolder]: For 311310/311310 co-relation queries the response was YES. [2023-01-27 21:32:01,575 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. [2023-01-27 21:32:01,588 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 540 selfloop transitions, 139 changer transitions 4/683 dead transitions. [2023-01-27 21:32:01,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 683 transitions, 14647 flow [2023-01-27 21:32:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 21:32:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 21:32:01,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1457 transitions. [2023-01-27 21:32:01,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342771982116244 [2023-01-27 21:32:01,590 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1457 transitions. [2023-01-27 21:32:01,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1457 transitions. [2023-01-27 21:32:01,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:32:01,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1457 transitions. [2023-01-27 21:32:01,591 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) [2023-01-27 21:32:01,593 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) [2023-01-27 21:32:01,593 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) [2023-01-27 21:32:01,593 INFO L175 Difference]: Start difference. First operand has 246 places, 588 transitions, 11575 flow. Second operand 11 states and 1457 transitions. [2023-01-27 21:32:01,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 683 transitions, 14647 flow [2023-01-27 21:32:02,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 683 transitions, 14005 flow, removed 285 selfloop flow, removed 9 redundant places. [2023-01-27 21:32:02,488 INFO L231 Difference]: Finished difference. Result has 250 places, 643 transitions, 12387 flow [2023-01-27 21:32:02,489 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} [2023-01-27 21:32:02,489 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 228 predicate places. [2023-01-27 21:32:02,489 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 643 transitions, 12387 flow [2023-01-27 21:32:02,489 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) [2023-01-27 21:32:02,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:32:02,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:32:02,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-01-27 21:32:02,693 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 [2023-01-27 21:32:02,694 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:32:02,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:32:02,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2069382376, now seen corresponding path program 15 times [2023-01-27 21:32:02,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:32:02,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420412376] [2023-01-27 21:32:02,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:32:02,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:32:02,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:02,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:32:02,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420412376] [2023-01-27 21:32:02,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420412376] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:32:02,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15031152] [2023-01-27 21:32:02,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:32:02,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:32:02,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:32:02,748 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) [2023-01-27 21:32:02,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-27 21:32:02,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-27 21:32:02,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:32:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:32:02,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:32:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:02,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:32:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:02,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15031152] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:32:02,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:32:02,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-27 21:32:02,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221431294] [2023-01-27 21:32:02,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:32:02,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:32:02,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:32:02,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:32:02,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:32:02,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:32:02,957 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) [2023-01-27 21:32:02,957 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:32:02,957 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:32:02,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:32:04,375 INFO L130 PetriNetUnfolder]: 2524/4994 cut-off events. [2023-01-27 21:32:04,375 INFO L131 PetriNetUnfolder]: For 364898/364898 co-relation queries the response was YES. [2023-01-27 21:32:04,401 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. [2023-01-27 21:32:04,416 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 475 selfloop transitions, 263 changer transitions 1/739 dead transitions. [2023-01-27 21:32:04,416 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 739 transitions, 15773 flow [2023-01-27 21:32:04,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 21:32:04,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 21:32:04,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2393 transitions. [2023-01-27 21:32:04,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358834244080146 [2023-01-27 21:32:04,420 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2393 transitions. [2023-01-27 21:32:04,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2393 transitions. [2023-01-27 21:32:04,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:32:04,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2393 transitions. [2023-01-27 21:32:04,423 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) [2023-01-27 21:32:04,426 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) [2023-01-27 21:32:04,426 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) [2023-01-27 21:32:04,426 INFO L175 Difference]: Start difference. First operand has 250 places, 643 transitions, 12387 flow. Second operand 18 states and 2393 transitions. [2023-01-27 21:32:04,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 739 transitions, 15773 flow [2023-01-27 21:32:05,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 739 transitions, 15381 flow, removed 158 selfloop flow, removed 4 redundant places. [2023-01-27 21:32:05,598 INFO L231 Difference]: Finished difference. Result has 270 places, 666 transitions, 13740 flow [2023-01-27 21:32:05,599 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} [2023-01-27 21:32:05,599 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 248 predicate places. [2023-01-27 21:32:05,599 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 666 transitions, 13740 flow [2023-01-27 21:32:05,599 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) [2023-01-27 21:32:05,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:32:05,600 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:32:05,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-01-27 21:32:05,804 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 [2023-01-27 21:32:05,804 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:32:05,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:32:05,804 INFO L85 PathProgramCache]: Analyzing trace with hash 575743984, now seen corresponding path program 16 times [2023-01-27 21:32:05,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:32:05,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849148262] [2023-01-27 21:32:05,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:32:05,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:32:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:05,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:05,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:32:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849148262] [2023-01-27 21:32:05,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849148262] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:32:05,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696042879] [2023-01-27 21:32:05,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:32:05,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:32:05,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:32:05,921 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) [2023-01-27 21:32:05,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-27 21:32:06,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:32:06,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:32:06,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:32:06,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:32:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:06,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:32:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:06,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696042879] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:32:06,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:32:06,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-27 21:32:06,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617615360] [2023-01-27 21:32:06,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:32:06,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-27 21:32:06,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:32:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-27 21:32:06,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-27 21:32:06,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:32:06,113 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) [2023-01-27 21:32:06,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:32:06,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:32:06,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:32:07,496 INFO L130 PetriNetUnfolder]: 2527/5024 cut-off events. [2023-01-27 21:32:07,497 INFO L131 PetriNetUnfolder]: For 406053/406053 co-relation queries the response was YES. [2023-01-27 21:32:07,528 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. [2023-01-27 21:32:07,546 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 543 selfloop transitions, 163 changer transitions 13/719 dead transitions. [2023-01-27 21:32:07,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 719 transitions, 16091 flow [2023-01-27 21:32:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-27 21:32:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-27 21:32:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1459 transitions. [2023-01-27 21:32:07,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43487332339791357 [2023-01-27 21:32:07,548 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1459 transitions. [2023-01-27 21:32:07,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1459 transitions. [2023-01-27 21:32:07,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:32:07,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1459 transitions. [2023-01-27 21:32:07,549 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) [2023-01-27 21:32:07,551 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) [2023-01-27 21:32:07,551 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) [2023-01-27 21:32:07,551 INFO L175 Difference]: Start difference. First operand has 270 places, 666 transitions, 13740 flow. Second operand 11 states and 1459 transitions. [2023-01-27 21:32:07,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 719 transitions, 16091 flow [2023-01-27 21:32:09,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 719 transitions, 15222 flow, removed 293 selfloop flow, removed 7 redundant places. [2023-01-27 21:32:09,076 INFO L231 Difference]: Finished difference. Result has 277 places, 668 transitions, 13453 flow [2023-01-27 21:32:09,077 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} [2023-01-27 21:32:09,077 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 255 predicate places. [2023-01-27 21:32:09,077 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 668 transitions, 13453 flow [2023-01-27 21:32:09,077 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) [2023-01-27 21:32:09,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:32:09,077 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:32:09,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-27 21:32:09,282 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 [2023-01-27 21:32:09,282 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:32:09,282 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:32:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1232509748, now seen corresponding path program 17 times [2023-01-27 21:32:09,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:32:09,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583927450] [2023-01-27 21:32:09,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:32:09,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:32:09,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:09,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:32:09,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583927450] [2023-01-27 21:32:09,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583927450] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:32:09,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231393755] [2023-01-27 21:32:09,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:32:09,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:32:09,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:32:09,365 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) [2023-01-27 21:32:09,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-27 21:32:09,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:32:09,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:32:09,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:32:09,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:32:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:09,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:32:09,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:09,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231393755] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:32:09,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:32:09,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-27 21:32:09,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789360055] [2023-01-27 21:32:09,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:32:09,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:32:09,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:32:09,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:32:09,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:32:09,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:32:09,545 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) [2023-01-27 21:32:09,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:32:09,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:32:09,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:32:11,155 INFO L130 PetriNetUnfolder]: 2508/4962 cut-off events. [2023-01-27 21:32:11,155 INFO L131 PetriNetUnfolder]: For 388713/388713 co-relation queries the response was YES. [2023-01-27 21:32:11,189 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. [2023-01-27 21:32:11,208 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 505 selfloop transitions, 218 changer transitions 12/735 dead transitions. [2023-01-27 21:32:11,208 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 735 transitions, 15835 flow [2023-01-27 21:32:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-27 21:32:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-27 21:32:11,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2380 transitions. [2023-01-27 21:32:11,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335154826958106 [2023-01-27 21:32:11,210 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2380 transitions. [2023-01-27 21:32:11,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2380 transitions. [2023-01-27 21:32:11,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:32:11,211 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2380 transitions. [2023-01-27 21:32:11,212 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) [2023-01-27 21:32:11,215 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) [2023-01-27 21:32:11,215 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) [2023-01-27 21:32:11,215 INFO L175 Difference]: Start difference. First operand has 277 places, 668 transitions, 13453 flow. Second operand 18 states and 2380 transitions. [2023-01-27 21:32:11,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 735 transitions, 15835 flow [2023-01-27 21:32:12,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 735 transitions, 15556 flow, removed 92 selfloop flow, removed 5 redundant places. [2023-01-27 21:32:12,553 INFO L231 Difference]: Finished difference. Result has 288 places, 666 transitions, 13648 flow [2023-01-27 21:32:12,554 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} [2023-01-27 21:32:12,554 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 266 predicate places. [2023-01-27 21:32:12,554 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 666 transitions, 13648 flow [2023-01-27 21:32:12,555 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) [2023-01-27 21:32:12,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:32:12,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:32:12,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-27 21:32:12,759 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 [2023-01-27 21:32:12,759 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:32:12,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:32:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1433210416, now seen corresponding path program 18 times [2023-01-27 21:32:12,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:32:12,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930607773] [2023-01-27 21:32:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:32:12,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:32:12,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:12,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:32:12,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930607773] [2023-01-27 21:32:12,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930607773] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:32:12,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26832858] [2023-01-27 21:32:12,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:32:12,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:32:12,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:32:12,834 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) [2023-01-27 21:32:12,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-27 21:32:12,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:32:12,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:32:12,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:32:12,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:32:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:13,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:32:13,061 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:13,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26832858] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:32:13,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:32:13,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-27 21:32:13,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543198081] [2023-01-27 21:32:13,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:32:13,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:32:13,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:32:13,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:32:13,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:32:13,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:32:13,064 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) [2023-01-27 21:32:13,064 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:32:13,064 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:32:13,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:32:14,475 INFO L130 PetriNetUnfolder]: 2530/5002 cut-off events. [2023-01-27 21:32:14,476 INFO L131 PetriNetUnfolder]: For 308599/308599 co-relation queries the response was YES. [2023-01-27 21:32:14,507 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. [2023-01-27 21:32:14,524 INFO L137 encePairwiseOnDemand]: 300/305 looper letters, 486 selfloop transitions, 253 changer transitions 4/743 dead transitions. [2023-01-27 21:32:14,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 743 transitions, 16419 flow [2023-01-27 21:32:14,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-27 21:32:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-27 21:32:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1747 transitions. [2023-01-27 21:32:14,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4406052963430013 [2023-01-27 21:32:14,526 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1747 transitions. [2023-01-27 21:32:14,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1747 transitions. [2023-01-27 21:32:14,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:32:14,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1747 transitions. [2023-01-27 21:32:14,527 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) [2023-01-27 21:32:14,529 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) [2023-01-27 21:32:14,529 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) [2023-01-27 21:32:14,529 INFO L175 Difference]: Start difference. First operand has 288 places, 666 transitions, 13648 flow. Second operand 13 states and 1747 transitions. [2023-01-27 21:32:14,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 743 transitions, 16419 flow [2023-01-27 21:32:15,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 743 transitions, 16001 flow, removed 32 selfloop flow, removed 18 redundant places. [2023-01-27 21:32:15,663 INFO L231 Difference]: Finished difference. Result has 284 places, 678 transitions, 14401 flow [2023-01-27 21:32:15,663 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} [2023-01-27 21:32:15,664 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 262 predicate places. [2023-01-27 21:32:15,664 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 678 transitions, 14401 flow [2023-01-27 21:32:15,664 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) [2023-01-27 21:32:15,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:32:15,664 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:32:15,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-27 21:32:15,868 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 [2023-01-27 21:32:15,868 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:32:15,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:32:15,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1176200413, now seen corresponding path program 19 times [2023-01-27 21:32:15,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:32:15,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960814863] [2023-01-27 21:32:15,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:32:15,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:32:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 21:32:16,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:32:16,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960814863] [2023-01-27 21:32:16,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960814863] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:32:16,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754702551] [2023-01-27 21:32:16,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-27 21:32:16,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:32:16,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:32:16,933 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) [2023-01-27 21:32:16,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-27 21:32:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:17,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-27 21:32:17,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:32:17,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:32:17,172 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-01-27 21:32:17,172 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 [2023-01-27 21:32:17,178 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 [2023-01-27 21:32:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:17,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:32:17,220 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 [2023-01-27 21:32:17,230 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:32:17,231 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 [2023-01-27 21:32:17,234 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 [2023-01-27 21:32:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-01-27 21:32:17,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754702551] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:32:17,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:32:17,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 20 [2023-01-27 21:32:17,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480763856] [2023-01-27 21:32:17,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:32:17,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-27 21:32:17,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:32:17,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-27 21:32:17,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=357, Unknown=1, NotChecked=38, Total=462 [2023-01-27 21:32:17,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 305 [2023-01-27 21:32:17,310 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) [2023-01-27 21:32:17,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:32:17,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 305 [2023-01-27 21:32:17,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:32:19,476 INFO L130 PetriNetUnfolder]: 2753/5476 cut-off events. [2023-01-27 21:32:19,476 INFO L131 PetriNetUnfolder]: For 341172/341215 co-relation queries the response was YES. [2023-01-27 21:32:19,506 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. [2023-01-27 21:32:19,524 INFO L137 encePairwiseOnDemand]: 292/305 looper letters, 642 selfloop transitions, 205 changer transitions 26/881 dead transitions. [2023-01-27 21:32:19,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 881 transitions, 19945 flow [2023-01-27 21:32:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 21:32:19,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 21:32:19,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1778 transitions. [2023-01-27 21:32:19,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29147540983606557 [2023-01-27 21:32:19,526 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1778 transitions. [2023-01-27 21:32:19,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1778 transitions. [2023-01-27 21:32:19,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:32:19,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1778 transitions. [2023-01-27 21:32:19,528 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) [2023-01-27 21:32:19,530 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) [2023-01-27 21:32:19,531 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) [2023-01-27 21:32:19,531 INFO L175 Difference]: Start difference. First operand has 284 places, 678 transitions, 14401 flow. Second operand 20 states and 1778 transitions. [2023-01-27 21:32:19,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 881 transitions, 19945 flow [2023-01-27 21:32:20,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 881 transitions, 19216 flow, removed 84 selfloop flow, removed 13 redundant places. [2023-01-27 21:32:20,736 INFO L231 Difference]: Finished difference. Result has 297 places, 792 transitions, 16765 flow [2023-01-27 21:32:20,736 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} [2023-01-27 21:32:20,737 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 275 predicate places. [2023-01-27 21:32:20,737 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 792 transitions, 16765 flow [2023-01-27 21:32:20,737 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) [2023-01-27 21:32:20,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:32:20,737 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:32:20,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-27 21:32:20,941 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 [2023-01-27 21:32:20,942 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:32:20,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:32:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1264890525, now seen corresponding path program 20 times [2023-01-27 21:32:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:32:20,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694105583] [2023-01-27 21:32:20,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:32:20,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:32:20,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:21,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:21,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:32:21,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694105583] [2023-01-27 21:32:21,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694105583] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:32:21,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631054064] [2023-01-27 21:32:21,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 21:32:21,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:32:21,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:32:21,005 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) [2023-01-27 21:32:21,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-27 21:32:21,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 21:32:21,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:32:21,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:32:21,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:32:21,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:21,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:32:21,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:21,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631054064] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:32:21,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:32:21,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-27 21:32:21,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164685818] [2023-01-27 21:32:21,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:32:21,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:32:21,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:32:21,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:32:21,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:32:21,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:32:21,191 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) [2023-01-27 21:32:21,191 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:32:21,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:32:21,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:32:22,953 INFO L130 PetriNetUnfolder]: 2799/5666 cut-off events. [2023-01-27 21:32:22,953 INFO L131 PetriNetUnfolder]: For 335386/335386 co-relation queries the response was YES. [2023-01-27 21:32:22,988 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. [2023-01-27 21:32:23,007 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 707 selfloop transitions, 234 changer transitions 70/1011 dead transitions. [2023-01-27 21:32:23,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 1011 transitions, 22779 flow [2023-01-27 21:32:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-27 21:32:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-27 21:32:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2239 transitions. [2023-01-27 21:32:23,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43182256509161043 [2023-01-27 21:32:23,009 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2239 transitions. [2023-01-27 21:32:23,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2239 transitions. [2023-01-27 21:32:23,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:32:23,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2239 transitions. [2023-01-27 21:32:23,011 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) [2023-01-27 21:32:23,013 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) [2023-01-27 21:32:23,013 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) [2023-01-27 21:32:23,014 INFO L175 Difference]: Start difference. First operand has 297 places, 792 transitions, 16765 flow. Second operand 17 states and 2239 transitions. [2023-01-27 21:32:23,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 1011 transitions, 22779 flow [2023-01-27 21:32:24,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1011 transitions, 22435 flow, removed 167 selfloop flow, removed 3 redundant places. [2023-01-27 21:32:24,459 INFO L231 Difference]: Finished difference. Result has 314 places, 882 transitions, 19149 flow [2023-01-27 21:32:24,459 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} [2023-01-27 21:32:24,460 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 292 predicate places. [2023-01-27 21:32:24,460 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 882 transitions, 19149 flow [2023-01-27 21:32:24,460 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) [2023-01-27 21:32:24,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:32:24,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:32:24,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-27 21:32:24,664 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 [2023-01-27 21:32:24,665 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:32:24,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:32:24,665 INFO L85 PathProgramCache]: Analyzing trace with hash -622098217, now seen corresponding path program 21 times [2023-01-27 21:32:24,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:32:24,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910739518] [2023-01-27 21:32:24,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:32:24,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:32:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:24,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:32:24,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910739518] [2023-01-27 21:32:24,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910739518] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:32:24,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623713193] [2023-01-27 21:32:24,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-27 21:32:24,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:32:24,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:32:24,724 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) [2023-01-27 21:32:24,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-27 21:32:24,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-27 21:32:24,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:32:24,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:32:24,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:32:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:24,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:32:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:24,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623713193] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:32:24,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:32:24,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-01-27 21:32:24,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828802564] [2023-01-27 21:32:24,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:32:24,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-27 21:32:24,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:32:24,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-27 21:32:24,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-01-27 21:32:24,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:32:24,996 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) [2023-01-27 21:32:24,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:32:24,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:32:24,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:32:26,752 INFO L130 PetriNetUnfolder]: 2623/5346 cut-off events. [2023-01-27 21:32:26,752 INFO L131 PetriNetUnfolder]: For 345214/345214 co-relation queries the response was YES. [2023-01-27 21:32:26,787 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. [2023-01-27 21:32:26,805 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 632 selfloop transitions, 334 changer transitions 9/975 dead transitions. [2023-01-27 21:32:26,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 975 transitions, 22888 flow [2023-01-27 21:32:26,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-27 21:32:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-27 21:32:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2763 transitions. [2023-01-27 21:32:26,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4313817330210773 [2023-01-27 21:32:26,808 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2763 transitions. [2023-01-27 21:32:26,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2763 transitions. [2023-01-27 21:32:26,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:32:26,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2763 transitions. [2023-01-27 21:32:26,810 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) [2023-01-27 21:32:26,813 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) [2023-01-27 21:32:26,813 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) [2023-01-27 21:32:26,813 INFO L175 Difference]: Start difference. First operand has 314 places, 882 transitions, 19149 flow. Second operand 21 states and 2763 transitions. [2023-01-27 21:32:26,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 975 transitions, 22888 flow [2023-01-27 21:32:28,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 975 transitions, 21926 flow, removed 453 selfloop flow, removed 2 redundant places. [2023-01-27 21:32:28,578 INFO L231 Difference]: Finished difference. Result has 335 places, 900 transitions, 19619 flow [2023-01-27 21:32:28,578 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} [2023-01-27 21:32:28,578 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 313 predicate places. [2023-01-27 21:32:28,578 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 900 transitions, 19619 flow [2023-01-27 21:32:28,579 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) [2023-01-27 21:32:28,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:32:28,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:32:28,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-27 21:32:28,783 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 [2023-01-27 21:32:28,783 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:32:28,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:32:28,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1826008881, now seen corresponding path program 22 times [2023-01-27 21:32:28,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:32:28,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661617834] [2023-01-27 21:32:28,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:32:28,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:32:28,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:28,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:32:28,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661617834] [2023-01-27 21:32:28,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661617834] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:32:28,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673823503] [2023-01-27 21:32:28,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-27 21:32:28,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:32:28,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:32:28,840 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) [2023-01-27 21:32:28,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-27 21:32:28,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-27 21:32:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:32:28,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:32:28,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:32:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:28,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:32:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:29,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673823503] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:32:29,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:32:29,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-27 21:32:29,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284195353] [2023-01-27 21:32:29,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:32:29,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:32:29,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:32:29,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:32:29,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:32:29,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:32:29,003 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) [2023-01-27 21:32:29,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:32:29,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:32:29,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:32:31,061 INFO L130 PetriNetUnfolder]: 2719/5561 cut-off events. [2023-01-27 21:32:31,061 INFO L131 PetriNetUnfolder]: For 366921/366921 co-relation queries the response was YES. [2023-01-27 21:32:31,096 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. [2023-01-27 21:32:31,114 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 630 selfloop transitions, 392 changer transitions 7/1029 dead transitions. [2023-01-27 21:32:31,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 1029 transitions, 24666 flow [2023-01-27 21:32:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-27 21:32:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-27 21:32:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2647 transitions. [2023-01-27 21:32:31,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4339344262295082 [2023-01-27 21:32:31,117 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2647 transitions. [2023-01-27 21:32:31,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2647 transitions. [2023-01-27 21:32:31,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:32:31,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2647 transitions. [2023-01-27 21:32:31,119 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) [2023-01-27 21:32:31,121 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) [2023-01-27 21:32:31,121 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) [2023-01-27 21:32:31,121 INFO L175 Difference]: Start difference. First operand has 335 places, 900 transitions, 19619 flow. Second operand 20 states and 2647 transitions. [2023-01-27 21:32:31,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 1029 transitions, 24666 flow [2023-01-27 21:32:32,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 1029 transitions, 23945 flow, removed 312 selfloop flow, removed 5 redundant places. [2023-01-27 21:32:33,001 INFO L231 Difference]: Finished difference. Result has 357 places, 942 transitions, 21812 flow [2023-01-27 21:32:33,002 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} [2023-01-27 21:32:33,002 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 335 predicate places. [2023-01-27 21:32:33,002 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 942 transitions, 21812 flow [2023-01-27 21:32:33,002 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) [2023-01-27 21:32:33,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:32:33,002 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:32:33,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-27 21:32:33,206 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 [2023-01-27 21:32:33,207 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:32:33,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:32:33,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1058366777, now seen corresponding path program 23 times [2023-01-27 21:32:33,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:32:33,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97014079] [2023-01-27 21:32:33,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:32:33,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:32:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:33,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:33,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:32:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97014079] [2023-01-27 21:32:33,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97014079] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:32:33,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057289904] [2023-01-27 21:32:33,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-27 21:32:33,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:32:33,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:32:33,271 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) [2023-01-27 21:32:33,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-27 21:32:33,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-27 21:32:33,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:32:33,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-27 21:32:33,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:32:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:33,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:32:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:33,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057289904] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 21:32:33,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 21:32:33,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-01-27 21:32:33,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328507116] [2023-01-27 21:32:33,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 21:32:33,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 21:32:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 21:32:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 21:32:33,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-01-27 21:32:33,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 305 [2023-01-27 21:32:33,451 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) [2023-01-27 21:32:33,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 21:32:33,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 305 [2023-01-27 21:32:33,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 21:32:35,338 INFO L130 PetriNetUnfolder]: 2625/5329 cut-off events. [2023-01-27 21:32:35,338 INFO L131 PetriNetUnfolder]: For 336676/336676 co-relation queries the response was YES. [2023-01-27 21:32:35,376 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. [2023-01-27 21:32:35,395 INFO L137 encePairwiseOnDemand]: 299/305 looper letters, 645 selfloop transitions, 345 changer transitions 1/991 dead transitions. [2023-01-27 21:32:35,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 991 transitions, 24447 flow [2023-01-27 21:32:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-27 21:32:35,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-27 21:32:35,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1855 transitions. [2023-01-27 21:32:35,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4344262295081967 [2023-01-27 21:32:35,397 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1855 transitions. [2023-01-27 21:32:35,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1855 transitions. [2023-01-27 21:32:35,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 21:32:35,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1855 transitions. [2023-01-27 21:32:35,398 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) [2023-01-27 21:32:35,400 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) [2023-01-27 21:32:35,400 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) [2023-01-27 21:32:35,400 INFO L175 Difference]: Start difference. First operand has 357 places, 942 transitions, 21812 flow. Second operand 14 states and 1855 transitions. [2023-01-27 21:32:35,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 991 transitions, 24447 flow [2023-01-27 21:32:37,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 991 transitions, 23553 flow, removed 368 selfloop flow, removed 10 redundant places. [2023-01-27 21:32:37,637 INFO L231 Difference]: Finished difference. Result has 360 places, 938 transitions, 21586 flow [2023-01-27 21:32:37,637 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} [2023-01-27 21:32:37,638 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 338 predicate places. [2023-01-27 21:32:37,638 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 938 transitions, 21586 flow [2023-01-27 21:32:37,638 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) [2023-01-27 21:32:37,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 21:32:37,638 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 21:32:37,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-01-27 21:32:37,842 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 [2023-01-27 21:32:37,843 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-27 21:32:37,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 21:32:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1367206724, now seen corresponding path program 24 times [2023-01-27 21:32:37,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 21:32:37,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334680192] [2023-01-27 21:32:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 21:32:37,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 21:32:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 21:32:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-27 21:32:38,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 21:32:38,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334680192] [2023-01-27 21:32:38,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334680192] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 21:32:38,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114207798] [2023-01-27 21:32:38,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-27 21:32:38,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 21:32:38,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 21:32:38,050 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) [2023-01-27 21:32:38,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-27 21:32:38,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-27 21:32:38,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 21:32:38,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-27 21:32:38,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 21:32:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:32:38,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-27 21:32:38,280 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-01-27 21:32:38,280 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 [2023-01-27 21:32:38,305 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 [2023-01-27 21:32:38,341 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-27 21:32:38,341 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 [2023-01-27 21:32:38,375 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 [2023-01-27 21:32:38,404 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 [2023-01-27 21:32:38,428 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 [2023-01-27 21:32:38,483 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 [2023-01-27 21:32:38,581 INFO L321 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2023-01-27 21:32:38,582 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 [2023-01-27 21:32:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-27 21:32:38,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 21:32:39,138 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:32:39,138 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 [2023-01-27 21:32:39,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:32:39,253 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 [2023-01-27 21:32:39,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:32:39,612 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 [2023-01-27 21:32:39,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:32:39,828 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 [2023-01-27 21:32:40,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-27 21:32:40,090 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 [2023-01-27 21:32:40,264 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-27 21:44:07,899 WARN L222 SmtUtils]: Spent 14.14s 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) [2023-01-27 21:44:18,307 WARN L222 SmtUtils]: Spent 5.28s on a formula simplification. DAG size of input: 391 DAG size of output: 418 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-01-27 21:45:37,492 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-27 21:45:37,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-27 21:45:37,500 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 [2023-01-27 21:45:37,500 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 [2023-01-27 21:45:37,692 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 [2023-01-27 21:45:37,693 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 ∧-78-6-4-6-4-8-6-8-5-10-4-10-5-8-5-6-5-6-3-4-3-3-3-2-2-2-1 context. [2023-01-27 21:45:37,694 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-27 21:45:37,694 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-27 21:45:37,695 INFO L445 BasicCegarLoop]: Path program histogram: [24, 3, 3, 2, 1, 1, 1, 1] [2023-01-27 21:45:37,697 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 21:45:37,697 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 21:45:37,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 09:45:37 BasicIcfg [2023-01-27 21:45:37,699 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 21:45:37,699 INFO L158 Benchmark]: Toolchain (without parser) took 853842.50ms. Allocated memory was 629.1MB in the beginning and 2.2GB in the end (delta: 1.6GB). Free memory was 589.9MB in the beginning and 968.2MB in the end (delta: -378.2MB). Peak memory consumption was 1.5GB. Max. memory is 16.0GB. [2023-01-27 21:45:37,699 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 362.8MB. Free memory is still 310.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 21:45:37,699 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.18ms. Allocated memory is still 629.1MB. Free memory was 589.9MB in the beginning and 578.2MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-27 21:45:37,699 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.73ms. Allocated memory is still 629.1MB. Free memory was 578.2MB in the beginning and 576.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:45:37,700 INFO L158 Benchmark]: Boogie Preprocessor took 18.51ms. Allocated memory is still 629.1MB. Free memory was 576.1MB in the beginning and 574.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 21:45:37,700 INFO L158 Benchmark]: RCFGBuilder took 490.53ms. Allocated memory is still 629.1MB. Free memory was 574.0MB in the beginning and 539.2MB in the end (delta: 34.8MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. [2023-01-27 21:45:37,700 INFO L158 Benchmark]: TraceAbstraction took 853149.48ms. Allocated memory was 629.1MB in the beginning and 2.2GB in the end (delta: 1.6GB). Free memory was 538.4MB in the beginning and 968.2MB in the end (delta: -429.8MB). Peak memory consumption was 1.4GB. Max. memory is 16.0GB. [2023-01-27 21:45:37,701 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 362.8MB. Free memory is still 310.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 153.18ms. Allocated memory is still 629.1MB. Free memory was 589.9MB in the beginning and 578.2MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.73ms. Allocated memory is still 629.1MB. Free memory was 578.2MB in the beginning and 576.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.51ms. Allocated memory is still 629.1MB. Free memory was 576.1MB in the beginning and 574.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 490.53ms. Allocated memory is still 629.1MB. Free memory was 574.0MB in the beginning and 539.2MB in the end (delta: 34.8MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. * TraceAbstraction took 853149.48ms. Allocated memory was 629.1MB in the beginning and 2.2GB in the end (delta: 1.6GB). Free memory was 538.4MB in the beginning and 968.2MB in the end (delta: -429.8MB). Peak memory consumption was 1.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 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 ∧-78-6-4-6-4-8-6-8-5-10-4-10-5-8-5-6-5-6-3-4-3-3-3-2-2-2-1 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 ∧-78-6-4-6-4-8-6-8-5-10-4-10-5-8-5-6-5-6-3-4-3-3-3-2-2-2-1 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 ∧-78-6-4-6-4-8-6-8-5-10-4-10-5-8-5-6-5-6-3-4-3-3-3-2-2-2-1 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: 853.1s, OverallIterations: 36, TraceHistogramMax: 2, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 48.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1990 SdHoareTripleChecker+Valid, 4.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1990 mSDsluCounter, 270 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 90 IncrementalHoareTripleChecker+Unchecked, 164 mSDsCounter, 258 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8321 IncrementalHoareTripleChecker+Invalid, 8670 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 258 mSolverCounterUnsat, 106 mSDtfsCounter, 8321 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1591 GetRequests, 1008 SyntacticMatches, 66 SemanticMatches, 517 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 2466 ImplicationChecksByTransitivity, 7.9s 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, 1.3s SatisfiabilityAnalysisTime, 10.5s 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