/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 05:21:56,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 05:21:56,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 05:21:56,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 05:21:56,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 05:21:56,790 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 05:21:56,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 05:21:56,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 05:21:56,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 05:21:56,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 05:21:56,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 05:21:56,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 05:21:56,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 05:21:56,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 05:21:56,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 05:21:56,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 05:21:56,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 05:21:56,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 05:21:56,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 05:21:56,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 05:21:56,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 05:21:56,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 05:21:56,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 05:21:56,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 05:21:56,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 05:21:56,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 05:21:56,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 05:21:56,832 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 05:21:56,832 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 05:21:56,833 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 05:21:56,833 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 05:21:56,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 05:21:56,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 05:21:56,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 05:21:56,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 05:21:56,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 05:21:56,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 05:21:56,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 05:21:56,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 05:21:56,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 05:21:56,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 05:21:56,839 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 05:21:56,865 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 05:21:56,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 05:21:56,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 05:21:56,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 05:21:56,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 05:21:56,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 05:21:56,868 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 05:21:56,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 05:21:56,868 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 05:21:56,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 05:21:56,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 05:21:56,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 05:21:56,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 05:21:56,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 05:21:56,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 05:21:56,870 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 05:21:56,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 05:21:56,870 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 05:21:56,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 05:21:56,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 05:21:56,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 05:21:56,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 05:21:56,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 05:21:56,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 05:21:56,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 05:21:56,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 05:21:56,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 05:21:56,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 05:21:56,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 05:21:56,871 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 05:21:56,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 05:21:56,871 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 05:21:57,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 05:21:57,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 05:21:57,084 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 05:21:57,085 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 05:21:57,085 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 05:21:57,086 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-01-28 05:21:58,166 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 05:21:58,334 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 05:21:58,334 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-01-28 05:21:58,340 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44ec282c5/572830ec5c264069bd2d2b9205f181a9/FLAG351b83cd3 [2023-01-28 05:21:58,351 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44ec282c5/572830ec5c264069bd2d2b9205f181a9 [2023-01-28 05:21:58,353 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 05:21:58,354 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 05:21:58,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 05:21:58,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 05:21:58,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 05:21:58,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40624cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58, skipping insertion in model container [2023-01-28 05:21:58,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 05:21:58,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 05:21:58,495 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-send-receive-alt.wvr.c[2650,2663] [2023-01-28 05:21:58,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 05:21:58,509 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 05:21:58,525 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-send-receive-alt.wvr.c[2650,2663] [2023-01-28 05:21:58,528 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 05:21:58,534 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 05:21:58,534 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 05:21:58,540 INFO L208 MainTranslator]: Completed translation [2023-01-28 05:21:58,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58 WrapperNode [2023-01-28 05:21:58,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 05:21:58,541 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 05:21:58,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 05:21:58,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 05:21:58,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,583 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 147 [2023-01-28 05:21:58,584 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 05:21:58,584 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 05:21:58,584 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 05:21:58,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 05:21:58,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,594 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,602 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,603 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 05:21:58,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 05:21:58,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 05:21:58,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 05:21:58,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (1/1) ... [2023-01-28 05:21:58,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 05:21:58,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:21:58,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 05:21:58,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 05:21:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 05:21:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 05:21:58,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 05:21:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 05:21:58,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 05:21:58,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 05:21:58,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 05:21:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 05:21:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 05:21:58,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 05:21:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 05:21:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 05:21:58,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 05:21:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 05:21:58,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 05:21:58,691 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 05:21:58,833 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 05:21:58,834 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 05:21:59,071 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 05:21:59,145 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 05:21:59,146 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 05:21:59,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 05:21:59 BoogieIcfgContainer [2023-01-28 05:21:59,148 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 05:21:59,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 05:21:59,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 05:21:59,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 05:21:59,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 05:21:58" (1/3) ... [2023-01-28 05:21:59,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ec689f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 05:21:59, skipping insertion in model container [2023-01-28 05:21:59,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:21:58" (2/3) ... [2023-01-28 05:21:59,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ec689f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 05:21:59, skipping insertion in model container [2023-01-28 05:21:59,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 05:21:59" (3/3) ... [2023-01-28 05:21:59,163 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-01-28 05:21:59,178 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 05:21:59,178 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 05:21:59,179 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 05:21:59,267 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 05:21:59,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 127 transitions, 270 flow [2023-01-28 05:21:59,438 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2023-01-28 05:21:59,438 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:21:59,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-28 05:21:59,442 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 127 transitions, 270 flow [2023-01-28 05:21:59,452 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 117 transitions, 246 flow [2023-01-28 05:21:59,455 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 05:21:59,468 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 117 transitions, 246 flow [2023-01-28 05:21:59,474 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 117 transitions, 246 flow [2023-01-28 05:21:59,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 117 transitions, 246 flow [2023-01-28 05:21:59,517 INFO L130 PetriNetUnfolder]: 11/117 cut-off events. [2023-01-28 05:21:59,518 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:21:59,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 11/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-28 05:21:59,521 INFO L119 LiptonReduction]: Number of co-enabled transitions 792 [2023-01-28 05:22:03,844 INFO L134 LiptonReduction]: Checked pairs total: 883 [2023-01-28 05:22:03,844 INFO L136 LiptonReduction]: Total number of compositions: 130 [2023-01-28 05:22:03,862 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 05:22:03,871 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;@57d91681, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 05:22:03,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 05:22:03,884 INFO L130 PetriNetUnfolder]: 3/15 cut-off events. [2023-01-28 05:22:03,884 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:22:03,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:03,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:03,886 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:03,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:03,890 INFO L85 PathProgramCache]: Analyzing trace with hash -238231372, now seen corresponding path program 1 times [2023-01-28 05:22:03,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:03,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563236020] [2023-01-28 05:22:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:03,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:04,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:04,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:04,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563236020] [2023-01-28 05:22:04,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563236020] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:22:04,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:22:04,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 05:22:04,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869137257] [2023-01-28 05:22:04,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:22:04,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 05:22:04,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 05:22:04,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 05:22:04,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 257 [2023-01-28 05:22:04,415 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,415 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:04,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 257 [2023-01-28 05:22:04,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:22:04,487 INFO L130 PetriNetUnfolder]: 64/113 cut-off events. [2023-01-28 05:22:04,488 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2023-01-28 05:22:04,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 332 event pairs, 13 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2023-01-28 05:22:04,491 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2023-01-28 05:22:04,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2023-01-28 05:22:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 05:22:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 05:22:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 356 transitions. [2023-01-28 05:22:04,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46173800259403375 [2023-01-28 05:22:04,509 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 356 transitions. [2023-01-28 05:22:04,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 356 transitions. [2023-01-28 05:22:04,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:22:04,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 356 transitions. [2023-01-28 05:22:04,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.66666666666667) internal successors, (356), 3 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,524 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,526 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 356 transitions. [2023-01-28 05:22:04,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2023-01-28 05:22:04,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 05:22:04,530 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2023-01-28 05:22:04,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-01-28 05:22:04,535 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-01-28 05:22:04,536 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2023-01-28 05:22:04,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:04,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:04,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 05:22:04,537 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:04,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1359864469, now seen corresponding path program 1 times [2023-01-28 05:22:04,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:04,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111037011] [2023-01-28 05:22:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:04,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:04,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:04,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:04,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111037011] [2023-01-28 05:22:04,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111037011] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:22:04,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:22:04,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 05:22:04,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389736085] [2023-01-28 05:22:04,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:22:04,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 05:22:04,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:04,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 05:22:04,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 05:22:04,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 257 [2023-01-28 05:22:04,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:04,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 257 [2023-01-28 05:22:04,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:22:04,730 INFO L130 PetriNetUnfolder]: 48/96 cut-off events. [2023-01-28 05:22:04,730 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2023-01-28 05:22:04,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 230 event pairs, 15 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2023-01-28 05:22:04,731 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2023-01-28 05:22:04,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2023-01-28 05:22:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 05:22:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 05:22:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-01-28 05:22:04,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4345006485084306 [2023-01-28 05:22:04,734 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-01-28 05:22:04,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-01-28 05:22:04,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:22:04,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-01-28 05:22:04,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,738 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 257.0) internal successors, (1028), 4 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,739 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 335 transitions. [2023-01-28 05:22:04,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2023-01-28 05:22:04,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 05:22:04,740 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2023-01-28 05:22:04,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-01-28 05:22:04,741 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-01-28 05:22:04,742 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2023-01-28 05:22:04,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:04,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:04,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 05:22:04,742 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:04,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:04,745 INFO L85 PathProgramCache]: Analyzing trace with hash 210856546, now seen corresponding path program 1 times [2023-01-28 05:22:04,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:04,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813005953] [2023-01-28 05:22:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:04,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:04,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:22:04,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:04,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813005953] [2023-01-28 05:22:04,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813005953] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:22:04,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:22:04,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 05:22:04,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882127684] [2023-01-28 05:22:04,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:22:04,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 05:22:04,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:04,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 05:22:04,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 05:22:04,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 257 [2023-01-28 05:22:04,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:04,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 257 [2023-01-28 05:22:04,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:22:04,966 INFO L130 PetriNetUnfolder]: 57/126 cut-off events. [2023-01-28 05:22:04,967 INFO L131 PetriNetUnfolder]: For 31/31 co-relation queries the response was YES. [2023-01-28 05:22:04,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 400 event pairs, 40 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2023-01-28 05:22:04,968 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-01-28 05:22:04,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2023-01-28 05:22:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:22:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 05:22:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-01-28 05:22:04,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036964980544747 [2023-01-28 05:22:04,970 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-01-28 05:22:04,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-01-28 05:22:04,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:22:04,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-01-28 05:22:04,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,974 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,974 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 415 transitions. [2023-01-28 05:22:04,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2023-01-28 05:22:04,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 05:22:04,976 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2023-01-28 05:22:04,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-01-28 05:22:04,977 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-28 05:22:04,979 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2023-01-28 05:22:04,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:04,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:04,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:04,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 05:22:04,981 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:04,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:04,982 INFO L85 PathProgramCache]: Analyzing trace with hash -961979074, now seen corresponding path program 1 times [2023-01-28 05:22:04,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:04,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210988243] [2023-01-28 05:22:04,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:04,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:05,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:05,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:05,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210988243] [2023-01-28 05:22:05,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210988243] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:22:05,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49983343] [2023-01-28 05:22:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:05,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:05,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:22:05,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:22:05,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 05:22:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:05,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 05:22:05,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:22:06,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 05:22:06,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:22:06,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:22:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:06,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:22:06,643 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~back~0) (let ((.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ c_~sum~0 (select .cse0 .cse1)) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse3 .cse2) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse1)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-01-28 05:22:06,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:06,676 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 62 treesize of output 50 [2023-01-28 05:22:06,724 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:06,724 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 316 treesize of output 292 [2023-01-28 05:22:06,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:06,748 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 96 treesize of output 92 [2023-01-28 05:22:06,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:06,806 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 95 treesize of output 79 [2023-01-28 05:22:07,021 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:07,022 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 62 treesize of output 50 [2023-01-28 05:22:07,034 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 05:22:07,034 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 148 treesize of output 136 [2023-01-28 05:22:07,052 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 05:22:07,052 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 132 treesize of output 112 [2023-01-28 05:22:07,068 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 05:22:07,068 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 83 treesize of output 75 [2023-01-28 05:22:07,125 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 05:22:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-01-28 05:22:07,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49983343] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:22:07,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:22:07,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-01-28 05:22:07,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876335342] [2023-01-28 05:22:07,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:22:07,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 05:22:07,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:07,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 05:22:07,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=294, Unknown=4, NotChecked=36, Total=420 [2023-01-28 05:22:07,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 05:22:07,215 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:07,215 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:07,215 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 05:22:07,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:22:07,338 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse12 (* c_~front~0 4)) (.cse13 (* c_~back~0 4))) (let ((.cse5 (+ c_~queue~0.offset .cse13)) (.cse3 (+ c_~queue~0.offset .cse12)) (.cse0 (<= c_~n~0 c_~back~0)) (.cse4 (< c_~back~0 0))) (and (let ((.cse2 (select |c_#memory_int| c_~queue~0.base))) (or .cse0 (let ((.cse1 (+ c_~sum~0 (select .cse2 .cse3)))) (and (<= .cse1 1) (<= 0 .cse1))) .cse4 (not (= (select .cse2 .cse5) 1)))) (or .cse0 .cse4 (and (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse6 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base))) (or (not (= (select .cse6 .cse5) 1)) (<= (+ c_~sum~0 (select .cse6 .cse3)) 1)))) (forall ((v_ArrVal_73 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base))) (or (not (= (select .cse7 .cse5) 1)) (<= 0 (+ c_~sum~0 (select .cse7 .cse3)))))))) (<= 0 c_~sum~0) (<= c_~sum~0 1) (or (< (+ |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| 1) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse0 (and (<= c_~sum~0 0) (<= 0 (+ c_~sum~0 1)) (= c_~back~0 c_~front~0)) .cse4) (or .cse0 (let ((.cse10 (+ .cse13 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse9 (+ .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse8 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ c_~sum~0 (select .cse8 .cse9)) 1) (not (= (select .cse8 .cse10) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse11 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse11 .cse10) 1)) (<= 0 (+ c_~sum~0 (select .cse11 .cse9)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse4)))) is different from false [2023-01-28 05:22:08,021 INFO L130 PetriNetUnfolder]: 151/307 cut-off events. [2023-01-28 05:22:08,022 INFO L131 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2023-01-28 05:22:08,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 742 conditions, 307 events. 151/307 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1194 event pairs, 30 based on Foata normal form. 12/315 useless extension candidates. Maximal degree in co-relation 726. Up to 111 conditions per place. [2023-01-28 05:22:08,024 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 27 selfloop transitions, 12 changer transitions 47/86 dead transitions. [2023-01-28 05:22:08,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 86 transitions, 430 flow [2023-01-28 05:22:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 05:22:08,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 05:22:08,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1138 transitions. [2023-01-28 05:22:08,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.295201037613489 [2023-01-28 05:22:08,027 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1138 transitions. [2023-01-28 05:22:08,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1138 transitions. [2023-01-28 05:22:08,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:22:08,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1138 transitions. [2023-01-28 05:22:08,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 75.86666666666666) internal successors, (1138), 15 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:08,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:08,039 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:08,039 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 15 states and 1138 transitions. [2023-01-28 05:22:08,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 86 transitions, 430 flow [2023-01-28 05:22:08,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 86 transitions, 420 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 05:22:08,042 INFO L231 Difference]: Finished difference. Result has 45 places, 29 transitions, 165 flow [2023-01-28 05:22:08,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=165, PETRI_PLACES=45, PETRI_TRANSITIONS=29} [2023-01-28 05:22:08,043 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-01-28 05:22:08,043 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 29 transitions, 165 flow [2023-01-28 05:22:08,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 72.04761904761905) internal successors, (1513), 21 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:08,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:08,044 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:08,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 05:22:08,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:08,254 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:08,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash -438286575, now seen corresponding path program 2 times [2023-01-28 05:22:08,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:08,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30823833] [2023-01-28 05:22:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:08,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:22:08,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:08,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30823833] [2023-01-28 05:22:08,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30823833] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:22:08,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593985891] [2023-01-28 05:22:08,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:22:08,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:08,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:22:08,401 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:22:08,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 05:22:08,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:22:08,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:22:08,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 05:22:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:22:08,597 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 118 treesize of output 86 [2023-01-28 05:22:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:22:08,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:22:08,729 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 128 treesize of output 96 [2023-01-28 05:22:08,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:22:08,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593985891] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:22:08,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:22:08,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2023-01-28 05:22:08,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512239019] [2023-01-28 05:22:08,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:22:08,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 05:22:08,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:08,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 05:22:08,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-01-28 05:22:08,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 257 [2023-01-28 05:22:08,781 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 29 transitions, 165 flow. Second operand has 7 states, 7 states have (on average 110.85714285714286) internal successors, (776), 7 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:08,781 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:08,781 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 257 [2023-01-28 05:22:08,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:22:08,859 INFO L130 PetriNetUnfolder]: 184/362 cut-off events. [2023-01-28 05:22:08,859 INFO L131 PetriNetUnfolder]: For 358/362 co-relation queries the response was YES. [2023-01-28 05:22:08,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 362 events. 184/362 cut-off events. For 358/362 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1481 event pairs, 46 based on Foata normal form. 12/369 useless extension candidates. Maximal degree in co-relation 834. Up to 142 conditions per place. [2023-01-28 05:22:08,862 INFO L137 encePairwiseOnDemand]: 254/257 looper letters, 38 selfloop transitions, 9 changer transitions 0/49 dead transitions. [2023-01-28 05:22:08,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 49 transitions, 350 flow [2023-01-28 05:22:08,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:22:08,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 05:22:08,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 461 transitions. [2023-01-28 05:22:08,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.448443579766537 [2023-01-28 05:22:08,864 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 461 transitions. [2023-01-28 05:22:08,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 461 transitions. [2023-01-28 05:22:08,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:22:08,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 461 transitions. [2023-01-28 05:22:08,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.25) internal successors, (461), 4 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:08,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:08,867 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 257.0) internal successors, (1285), 5 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:08,867 INFO L175 Difference]: Start difference. First operand has 45 places, 29 transitions, 165 flow. Second operand 4 states and 461 transitions. [2023-01-28 05:22:08,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 49 transitions, 350 flow [2023-01-28 05:22:08,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 49 transitions, 308 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-01-28 05:22:08,871 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 222 flow [2023-01-28 05:22:08,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-01-28 05:22:08,872 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 21 predicate places. [2023-01-28 05:22:08,872 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 222 flow [2023-01-28 05:22:08,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.85714285714286) internal successors, (776), 7 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:08,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:08,873 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:08,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 05:22:09,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:09,080 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:09,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:09,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1347002828, now seen corresponding path program 3 times [2023-01-28 05:22:09,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:09,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118650582] [2023-01-28 05:22:09,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:09,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:10,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:10,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:10,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118650582] [2023-01-28 05:22:10,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118650582] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:22:10,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584784696] [2023-01-28 05:22:10,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:22:10,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:10,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:22:10,455 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:22:10,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 05:22:10,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 05:22:10,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:22:10,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-28 05:22:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:22:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:22:10,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:22:10,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:10,799 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 68 treesize of output 44 [2023-01-28 05:22:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 05:22:10,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584784696] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:22:10,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:22:10,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2023-01-28 05:22:10,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170752498] [2023-01-28 05:22:10,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:22:10,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 05:22:10,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:10,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 05:22:10,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-01-28 05:22:10,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 05:22:10,919 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 222 flow. Second operand has 22 states, 22 states have (on average 79.13636363636364) internal successors, (1741), 22 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:10,920 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:10,920 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 05:22:10,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:22:11,655 INFO L130 PetriNetUnfolder]: 313/613 cut-off events. [2023-01-28 05:22:11,655 INFO L131 PetriNetUnfolder]: For 849/849 co-relation queries the response was YES. [2023-01-28 05:22:11,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1976 conditions, 613 events. 313/613 cut-off events. For 849/849 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2843 event pairs, 48 based on Foata normal form. 3/614 useless extension candidates. Maximal degree in co-relation 1298. Up to 174 conditions per place. [2023-01-28 05:22:11,658 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 49 selfloop transitions, 25 changer transitions 44/118 dead transitions. [2023-01-28 05:22:11,658 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 118 transitions, 767 flow [2023-01-28 05:22:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 05:22:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 05:22:11,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1337 transitions. [2023-01-28 05:22:11,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32514591439688717 [2023-01-28 05:22:11,664 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1337 transitions. [2023-01-28 05:22:11,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1337 transitions. [2023-01-28 05:22:11,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:22:11,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1337 transitions. [2023-01-28 05:22:11,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 83.5625) internal successors, (1337), 16 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:11,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:11,675 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 257.0) internal successors, (4369), 17 states have internal predecessors, (4369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:11,675 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 222 flow. Second operand 16 states and 1337 transitions. [2023-01-28 05:22:11,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 118 transitions, 767 flow [2023-01-28 05:22:11,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 118 transitions, 737 flow, removed 15 selfloop flow, removed 0 redundant places. [2023-01-28 05:22:11,683 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 367 flow [2023-01-28 05:22:11,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=367, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-01-28 05:22:11,685 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-01-28 05:22:11,686 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 367 flow [2023-01-28 05:22:11,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 79.13636363636364) internal successors, (1741), 22 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:11,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:11,687 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:11,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 05:22:11,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:11,894 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:11,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:11,894 INFO L85 PathProgramCache]: Analyzing trace with hash -218673542, now seen corresponding path program 4 times [2023-01-28 05:22:11,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:11,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570522051] [2023-01-28 05:22:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:11,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:12,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570522051] [2023-01-28 05:22:12,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570522051] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:22:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415210454] [2023-01-28 05:22:12,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:22:12,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:22:12,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:22:12,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 05:22:13,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:22:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:22:13,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 05:22:13,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:22:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:22:13,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:22:13,560 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 05:22:13,560 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 170 [2023-01-28 05:22:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:22:13,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415210454] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:22:13,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:22:13,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 21 [2023-01-28 05:22:13,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253231877] [2023-01-28 05:22:13,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:22:13,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 05:22:13,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:13,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 05:22:13,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2023-01-28 05:22:13,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 05:22:13,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 367 flow. Second operand has 23 states, 23 states have (on average 79.21739130434783) internal successors, (1822), 23 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:13,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:13,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 05:22:13,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:22:14,680 INFO L130 PetriNetUnfolder]: 441/846 cut-off events. [2023-01-28 05:22:14,680 INFO L131 PetriNetUnfolder]: For 1454/1454 co-relation queries the response was YES. [2023-01-28 05:22:14,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2805 conditions, 846 events. 441/846 cut-off events. For 1454/1454 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4222 event pairs, 20 based on Foata normal form. 2/848 useless extension candidates. Maximal degree in co-relation 2116. Up to 186 conditions per place. [2023-01-28 05:22:14,685 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 63 selfloop transitions, 35 changer transitions 63/161 dead transitions. [2023-01-28 05:22:14,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 161 transitions, 1121 flow [2023-01-28 05:22:14,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 05:22:14,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 05:22:14,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1761 transitions. [2023-01-28 05:22:14,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3262923846581434 [2023-01-28 05:22:14,690 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1761 transitions. [2023-01-28 05:22:14,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1761 transitions. [2023-01-28 05:22:14,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:22:14,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1761 transitions. [2023-01-28 05:22:14,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.85714285714286) internal successors, (1761), 21 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:14,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:14,703 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 257.0) internal successors, (5654), 22 states have internal predecessors, (5654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:14,703 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 367 flow. Second operand 21 states and 1761 transitions. [2023-01-28 05:22:14,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 161 transitions, 1121 flow [2023-01-28 05:22:14,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 161 transitions, 1051 flow, removed 16 selfloop flow, removed 8 redundant places. [2023-01-28 05:22:14,710 INFO L231 Difference]: Finished difference. Result has 74 places, 57 transitions, 525 flow [2023-01-28 05:22:14,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=525, PETRI_PLACES=74, PETRI_TRANSITIONS=57} [2023-01-28 05:22:14,711 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-01-28 05:22:14,711 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 57 transitions, 525 flow [2023-01-28 05:22:14,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 79.21739130434783) internal successors, (1822), 23 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:14,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:14,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:14,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 05:22:14,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:14,923 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:14,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:14,924 INFO L85 PathProgramCache]: Analyzing trace with hash -417535956, now seen corresponding path program 5 times [2023-01-28 05:22:14,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:14,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560048321] [2023-01-28 05:22:14,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:14,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:15,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:15,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:15,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560048321] [2023-01-28 05:22:15,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560048321] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:22:15,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837010111] [2023-01-28 05:22:15,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:22:15,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:15,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:22:15,911 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:22:15,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 05:22:16,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:22:16,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:22:16,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 05:22:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:22:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:16,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:22:16,695 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 05:22:16,695 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 170 [2023-01-28 05:22:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:17,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837010111] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:22:17,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:22:17,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 26 [2023-01-28 05:22:17,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960549390] [2023-01-28 05:22:17,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:22:17,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 05:22:17,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:17,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 05:22:17,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2023-01-28 05:22:17,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 05:22:17,281 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 57 transitions, 525 flow. Second operand has 28 states, 28 states have (on average 78.85714285714286) internal successors, (2208), 28 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:17,281 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:17,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 05:22:17,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:22:18,480 INFO L130 PetriNetUnfolder]: 569/1117 cut-off events. [2023-01-28 05:22:18,481 INFO L131 PetriNetUnfolder]: For 2072/2072 co-relation queries the response was YES. [2023-01-28 05:22:18,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3729 conditions, 1117 events. 569/1117 cut-off events. For 2072/2072 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 6122 event pairs, 76 based on Foata normal form. 41/1158 useless extension candidates. Maximal degree in co-relation 3550. Up to 228 conditions per place. [2023-01-28 05:22:18,487 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 62 selfloop transitions, 33 changer transitions 63/158 dead transitions. [2023-01-28 05:22:18,487 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 158 transitions, 1223 flow [2023-01-28 05:22:18,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 05:22:18,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 05:22:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1594 transitions. [2023-01-28 05:22:18,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3264386647552734 [2023-01-28 05:22:18,492 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1594 transitions. [2023-01-28 05:22:18,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1594 transitions. [2023-01-28 05:22:18,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:22:18,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1594 transitions. [2023-01-28 05:22:18,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 83.89473684210526) internal successors, (1594), 19 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:18,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:18,503 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:18,503 INFO L175 Difference]: Start difference. First operand has 74 places, 57 transitions, 525 flow. Second operand 19 states and 1594 transitions. [2023-01-28 05:22:18,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 158 transitions, 1223 flow [2023-01-28 05:22:18,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 158 transitions, 1101 flow, removed 41 selfloop flow, removed 8 redundant places. [2023-01-28 05:22:18,514 INFO L231 Difference]: Finished difference. Result has 91 places, 62 transitions, 587 flow [2023-01-28 05:22:18,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=587, PETRI_PLACES=91, PETRI_TRANSITIONS=62} [2023-01-28 05:22:18,517 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-01-28 05:22:18,518 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 62 transitions, 587 flow [2023-01-28 05:22:18,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 78.85714285714286) internal successors, (2208), 28 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:18,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:18,519 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:18,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 05:22:18,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:18,725 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:18,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1104904085, now seen corresponding path program 6 times [2023-01-28 05:22:18,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:18,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643406439] [2023-01-28 05:22:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:18,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:22:18,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:18,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643406439] [2023-01-28 05:22:18,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643406439] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:22:18,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158641770] [2023-01-28 05:22:18,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:22:18,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:18,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:22:18,952 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:22:18,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 05:22:19,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:22:19,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:22:19,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:22:19,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:22:19,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:19,218 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 158 treesize of output 108 [2023-01-28 05:22:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:22:19,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:22:19,468 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 05:22:19,468 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 174 treesize of output 126 [2023-01-28 05:22:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:22:19,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158641770] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:22:19,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:22:19,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2023-01-28 05:22:19,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303433143] [2023-01-28 05:22:19,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:22:19,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:22:19,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:19,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:22:19,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-01-28 05:22:19,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 257 [2023-01-28 05:22:19,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 62 transitions, 587 flow. Second operand has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:19,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:19,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 257 [2023-01-28 05:22:19,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:22:19,987 INFO L130 PetriNetUnfolder]: 899/1721 cut-off events. [2023-01-28 05:22:19,987 INFO L131 PetriNetUnfolder]: For 6271/6271 co-relation queries the response was YES. [2023-01-28 05:22:19,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6663 conditions, 1721 events. 899/1721 cut-off events. For 6271/6271 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 10303 event pairs, 134 based on Foata normal form. 20/1725 useless extension candidates. Maximal degree in co-relation 5990. Up to 515 conditions per place. [2023-01-28 05:22:19,998 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 69 selfloop transitions, 47 changer transitions 39/158 dead transitions. [2023-01-28 05:22:19,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 158 transitions, 1466 flow [2023-01-28 05:22:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 05:22:19,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 05:22:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1377 transitions. [2023-01-28 05:22:20,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35719844357976654 [2023-01-28 05:22:20,003 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1377 transitions. [2023-01-28 05:22:20,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1377 transitions. [2023-01-28 05:22:20,004 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:22:20,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1377 transitions. [2023-01-28 05:22:20,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:20,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:20,013 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:20,013 INFO L175 Difference]: Start difference. First operand has 91 places, 62 transitions, 587 flow. Second operand 15 states and 1377 transitions. [2023-01-28 05:22:20,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 158 transitions, 1466 flow [2023-01-28 05:22:20,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 158 transitions, 1379 flow, removed 20 selfloop flow, removed 13 redundant places. [2023-01-28 05:22:20,034 INFO L231 Difference]: Finished difference. Result has 91 places, 84 transitions, 973 flow [2023-01-28 05:22:20,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=973, PETRI_PLACES=91, PETRI_TRANSITIONS=84} [2023-01-28 05:22:20,035 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 71 predicate places. [2023-01-28 05:22:20,035 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 84 transitions, 973 flow [2023-01-28 05:22:20,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:20,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:20,036 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:20,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 05:22:20,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:20,243 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:20,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:20,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1313718566, now seen corresponding path program 7 times [2023-01-28 05:22:20,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:20,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82689170] [2023-01-28 05:22:20,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:20,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:21,561 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:21,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82689170] [2023-01-28 05:22:21,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82689170] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:22:21,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432093110] [2023-01-28 05:22:21,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:22:21,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:21,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:22:21,563 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:22:21,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 05:22:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:21,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 05:22:21,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:22:22,071 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:22,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:22:22,742 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-01-28 05:22:22,742 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-01-28 05:22:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:23,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432093110] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:22:23,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:22:23,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-01-28 05:22:23,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632177727] [2023-01-28 05:22:23,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:22:23,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 05:22:23,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:23,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 05:22:23,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2023-01-28 05:22:23,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 05:22:23,697 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 84 transitions, 973 flow. Second operand has 38 states, 38 states have (on average 78.55263157894737) internal successors, (2985), 38 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:23,697 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:23,697 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 05:22:23,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:22:33,818 INFO L130 PetriNetUnfolder]: 3356/6261 cut-off events. [2023-01-28 05:22:33,818 INFO L131 PetriNetUnfolder]: For 32787/32787 co-relation queries the response was YES. [2023-01-28 05:22:33,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28264 conditions, 6261 events. 3356/6261 cut-off events. For 32787/32787 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 46665 event pairs, 301 based on Foata normal form. 125/6386 useless extension candidates. Maximal degree in co-relation 25760. Up to 1789 conditions per place. [2023-01-28 05:22:33,856 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 338 selfloop transitions, 256 changer transitions 261/855 dead transitions. [2023-01-28 05:22:33,856 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 855 transitions, 8620 flow [2023-01-28 05:22:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-01-28 05:22:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-01-28 05:22:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 7433 transitions. [2023-01-28 05:22:33,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3324388389462856 [2023-01-28 05:22:33,877 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 7433 transitions. [2023-01-28 05:22:33,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 7433 transitions. [2023-01-28 05:22:33,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:22:33,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 7433 transitions. [2023-01-28 05:22:33,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 85.4367816091954) internal successors, (7433), 87 states have internal predecessors, (7433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:33,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:33,932 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 257.0) internal successors, (22616), 88 states have internal predecessors, (22616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:33,932 INFO L175 Difference]: Start difference. First operand has 91 places, 84 transitions, 973 flow. Second operand 87 states and 7433 transitions. [2023-01-28 05:22:33,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 855 transitions, 8620 flow [2023-01-28 05:22:33,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 855 transitions, 7243 flow, removed 684 selfloop flow, removed 7 redundant places. [2023-01-28 05:22:34,005 INFO L231 Difference]: Finished difference. Result has 225 places, 336 transitions, 5255 flow [2023-01-28 05:22:34,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=5255, PETRI_PLACES=225, PETRI_TRANSITIONS=336} [2023-01-28 05:22:34,007 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 205 predicate places. [2023-01-28 05:22:34,007 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 336 transitions, 5255 flow [2023-01-28 05:22:34,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 78.55263157894737) internal successors, (2985), 38 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:34,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:34,008 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:34,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 05:22:34,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:34,214 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:34,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:34,214 INFO L85 PathProgramCache]: Analyzing trace with hash -533908624, now seen corresponding path program 8 times [2023-01-28 05:22:34,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:34,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947590922] [2023-01-28 05:22:34,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:34,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:35,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:35,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947590922] [2023-01-28 05:22:35,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947590922] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:22:35,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721526086] [2023-01-28 05:22:35,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:22:35,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:35,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:22:35,661 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:22:35,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 05:22:35,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:22:35,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:22:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-28 05:22:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:22:35,938 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 11 treesize of output 7 [2023-01-28 05:22:35,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:22:36,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:22:36,324 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:36,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:22:37,388 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:37,388 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 182 treesize of output 122 [2023-01-28 05:22:37,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:37,437 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 772 [2023-01-28 05:22:37,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:37,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 256 treesize of output 300 [2023-01-28 05:22:37,548 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:37,549 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 259 [2023-01-28 05:22:41,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:41,431 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 182 treesize of output 122 [2023-01-28 05:22:41,462 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 05:22:41,463 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 700 [2023-01-28 05:22:41,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:22:41,482 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:22:41,483 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:22:41,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:22:41,484 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:22:41,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:22:41,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 216 [2023-01-28 05:22:41,509 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 05:22:41,509 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 187 [2023-01-28 05:22:41,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:41,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721526086] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:22:41,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:22:41,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-01-28 05:22:41,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214005591] [2023-01-28 05:22:41,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:22:41,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 05:22:41,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 05:22:41,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1301, Unknown=7, NotChecked=0, Total=1560 [2023-01-28 05:22:41,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 05:22:41,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 336 transitions, 5255 flow. Second operand has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:41,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:41,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 05:22:41,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:22:48,179 INFO L130 PetriNetUnfolder]: 4551/8460 cut-off events. [2023-01-28 05:22:48,179 INFO L131 PetriNetUnfolder]: For 158967/158967 co-relation queries the response was YES. [2023-01-28 05:22:48,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39133 conditions, 8460 events. 4551/8460 cut-off events. For 158967/158967 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 65441 event pairs, 1481 based on Foata normal form. 16/8476 useless extension candidates. Maximal degree in co-relation 37262. Up to 4858 conditions per place. [2023-01-28 05:22:48,266 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 425 selfloop transitions, 178 changer transitions 171/774 dead transitions. [2023-01-28 05:22:48,266 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 774 transitions, 10560 flow [2023-01-28 05:22:48,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-01-28 05:22:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-01-28 05:22:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3998 transitions. [2023-01-28 05:22:48,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2991619275665968 [2023-01-28 05:22:48,275 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3998 transitions. [2023-01-28 05:22:48,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3998 transitions. [2023-01-28 05:22:48,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:22:48,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3998 transitions. [2023-01-28 05:22:48,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 76.88461538461539) internal successors, (3998), 52 states have internal predecessors, (3998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:48,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 257.0) internal successors, (13621), 53 states have internal predecessors, (13621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:48,316 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 257.0) internal successors, (13621), 53 states have internal predecessors, (13621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:48,317 INFO L175 Difference]: Start difference. First operand has 225 places, 336 transitions, 5255 flow. Second operand 52 states and 3998 transitions. [2023-01-28 05:22:48,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 774 transitions, 10560 flow [2023-01-28 05:22:48,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 774 transitions, 7545 flow, removed 1496 selfloop flow, removed 8 redundant places. [2023-01-28 05:22:48,869 INFO L231 Difference]: Finished difference. Result has 287 places, 452 transitions, 5497 flow [2023-01-28 05:22:48,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=3588, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=5497, PETRI_PLACES=287, PETRI_TRANSITIONS=452} [2023-01-28 05:22:48,869 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 267 predicate places. [2023-01-28 05:22:48,869 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 452 transitions, 5497 flow [2023-01-28 05:22:48,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:48,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:22:48,870 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:22:48,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 05:22:49,078 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,SelfDestructingSolverStorable10 [2023-01-28 05:22:49,078 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:22:49,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:22:49,079 INFO L85 PathProgramCache]: Analyzing trace with hash 360516940, now seen corresponding path program 9 times [2023-01-28 05:22:49,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:22:49,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309562645] [2023-01-28 05:22:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:22:49,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:22:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:22:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:50,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:22:50,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309562645] [2023-01-28 05:22:50,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309562645] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:22:50,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749235439] [2023-01-28 05:22:50,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:22:50,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:22:50,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:22:50,585 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:22:50,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 05:22:50,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 05:22:50,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:22:50,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 62 conjunts are in the unsatisfiable core [2023-01-28 05:22:50,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:22:50,906 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 11 treesize of output 7 [2023-01-28 05:22:50,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:22:51,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:22:51,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:51,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:22:52,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:52,664 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 182 treesize of output 122 [2023-01-28 05:22:52,729 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-28 05:22:52,729 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 378 [2023-01-28 05:22:52,791 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-28 05:22:52,791 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 298 [2023-01-28 05:22:52,858 INFO L321 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-01-28 05:22:52,859 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 229 [2023-01-28 05:22:55,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:22:55,138 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 182 treesize of output 122 [2023-01-28 05:22:55,164 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 05:22:55,165 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 336 [2023-01-28 05:22:55,195 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 05:22:55,195 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 256 [2023-01-28 05:22:55,223 INFO L321 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-01-28 05:22:55,223 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 187 [2023-01-28 05:22:55,355 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 05:22:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:22:55,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749235439] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:22:55,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:22:55,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-01-28 05:22:55,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139134486] [2023-01-28 05:22:55,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:22:55,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 05:22:55,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:22:55,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 05:22:55,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1222, Unknown=4, NotChecked=0, Total=1560 [2023-01-28 05:22:55,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 05:22:55,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 452 transitions, 5497 flow. Second operand has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:22:55,589 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:22:55,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 05:22:55,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:23:00,420 INFO L130 PetriNetUnfolder]: 4393/8211 cut-off events. [2023-01-28 05:23:00,421 INFO L131 PetriNetUnfolder]: For 137740/137740 co-relation queries the response was YES. [2023-01-28 05:23:00,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33031 conditions, 8211 events. 4393/8211 cut-off events. For 137740/137740 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 63852 event pairs, 1462 based on Foata normal form. 36/8247 useless extension candidates. Maximal degree in co-relation 31877. Up to 6043 conditions per place. [2023-01-28 05:23:00,497 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 390 selfloop transitions, 101 changer transitions 150/641 dead transitions. [2023-01-28 05:23:00,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 641 transitions, 7243 flow [2023-01-28 05:23:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 05:23:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 05:23:00,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3125 transitions. [2023-01-28 05:23:00,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2965739774129259 [2023-01-28 05:23:00,510 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3125 transitions. [2023-01-28 05:23:00,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3125 transitions. [2023-01-28 05:23:00,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:23:00,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3125 transitions. [2023-01-28 05:23:00,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 76.21951219512195) internal successors, (3125), 41 states have internal predecessors, (3125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:00,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 257.0) internal successors, (10794), 42 states have internal predecessors, (10794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:00,531 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 257.0) internal successors, (10794), 42 states have internal predecessors, (10794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:00,531 INFO L175 Difference]: Start difference. First operand has 287 places, 452 transitions, 5497 flow. Second operand 41 states and 3125 transitions. [2023-01-28 05:23:00,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 641 transitions, 7243 flow [2023-01-28 05:23:01,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 641 transitions, 6873 flow, removed 144 selfloop flow, removed 17 redundant places. [2023-01-28 05:23:01,149 INFO L231 Difference]: Finished difference. Result has 314 places, 429 transitions, 5084 flow [2023-01-28 05:23:01,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=4733, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=5084, PETRI_PLACES=314, PETRI_TRANSITIONS=429} [2023-01-28 05:23:01,150 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 294 predicate places. [2023-01-28 05:23:01,150 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 429 transitions, 5084 flow [2023-01-28 05:23:01,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:01,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:23:01,150 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:23:01,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 05:23:01,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:23:01,352 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:23:01,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:23:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash -899584993, now seen corresponding path program 10 times [2023-01-28 05:23:01,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:23:01,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867726894] [2023-01-28 05:23:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:23:01,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:23:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:23:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:23:01,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:23:01,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867726894] [2023-01-28 05:23:01,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867726894] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:23:01,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728924091] [2023-01-28 05:23:01,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:23:01,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:23:01,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:23:01,611 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:23:01,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 05:23:01,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:23:01,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:23:01,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 05:23:01,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:23:02,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:23:02,004 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 226 treesize of output 140 [2023-01-28 05:23:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:23:02,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:23:02,366 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-01-28 05:23:02,366 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 260 treesize of output 176 [2023-01-28 05:23:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:23:02,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728924091] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:23:02,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:23:02,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 23 [2023-01-28 05:23:02,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367382890] [2023-01-28 05:23:02,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:23:02,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 05:23:02,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:23:02,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 05:23:02,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-01-28 05:23:02,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 257 [2023-01-28 05:23:02,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 429 transitions, 5084 flow. Second operand has 24 states, 24 states have (on average 87.125) internal successors, (2091), 24 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:02,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:23:02,427 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 257 [2023-01-28 05:23:02,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:23:04,428 INFO L130 PetriNetUnfolder]: 3167/6088 cut-off events. [2023-01-28 05:23:04,428 INFO L131 PetriNetUnfolder]: For 59334/59336 co-relation queries the response was YES. [2023-01-28 05:23:04,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23510 conditions, 6088 events. 3167/6088 cut-off events. For 59334/59336 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 47201 event pairs, 479 based on Foata normal form. 248/6324 useless extension candidates. Maximal degree in co-relation 23182. Up to 1320 conditions per place. [2023-01-28 05:23:04,477 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 112 selfloop transitions, 124 changer transitions 209/449 dead transitions. [2023-01-28 05:23:04,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 449 transitions, 6355 flow [2023-01-28 05:23:04,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 05:23:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 05:23:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2678 transitions. [2023-01-28 05:23:04,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35931839527706966 [2023-01-28 05:23:04,481 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2678 transitions. [2023-01-28 05:23:04,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2678 transitions. [2023-01-28 05:23:04,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:23:04,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2678 transitions. [2023-01-28 05:23:04,485 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 92.34482758620689) internal successors, (2678), 29 states have internal predecessors, (2678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:04,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 257.0) internal successors, (7710), 30 states have internal predecessors, (7710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:04,490 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 257.0) internal successors, (7710), 30 states have internal predecessors, (7710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:04,490 INFO L175 Difference]: Start difference. First operand has 314 places, 429 transitions, 5084 flow. Second operand 29 states and 2678 transitions. [2023-01-28 05:23:04,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 449 transitions, 6355 flow [2023-01-28 05:23:04,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 449 transitions, 5301 flow, removed 398 selfloop flow, removed 76 redundant places. [2023-01-28 05:23:04,831 INFO L231 Difference]: Finished difference. Result has 240 places, 177 transitions, 2612 flow [2023-01-28 05:23:04,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2612, PETRI_PLACES=240, PETRI_TRANSITIONS=177} [2023-01-28 05:23:04,832 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 220 predicate places. [2023-01-28 05:23:04,832 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 177 transitions, 2612 flow [2023-01-28 05:23:04,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 87.125) internal successors, (2091), 24 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:04,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:23:04,833 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:23:04,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 05:23:05,038 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,SelfDestructingSolverStorable12 [2023-01-28 05:23:05,038 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:23:05,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:23:05,039 INFO L85 PathProgramCache]: Analyzing trace with hash 600606014, now seen corresponding path program 11 times [2023-01-28 05:23:05,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:23:05,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185077203] [2023-01-28 05:23:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:23:05,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:23:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:23:09,503 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:23:09,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:23:09,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185077203] [2023-01-28 05:23:09,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185077203] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:23:09,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113955345] [2023-01-28 05:23:09,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:23:09,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:23:09,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:23:09,505 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:23:09,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 05:23:09,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 05:23:09,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:23:09,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 05:23:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:23:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:23:09,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:23:10,511 INFO L321 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-01-28 05:23:10,511 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 264 treesize of output 230 [2023-01-28 05:23:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 05:23:11,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113955345] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:23:11,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:23:11,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 8] total 31 [2023-01-28 05:23:11,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744089616] [2023-01-28 05:23:11,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:23:11,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 05:23:11,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:23:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 05:23:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 05:23:11,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 05:23:11,343 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 177 transitions, 2612 flow. Second operand has 33 states, 33 states have (on average 71.81818181818181) internal successors, (2370), 33 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:11,343 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:23:11,343 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 05:23:11,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:23:15,189 INFO L130 PetriNetUnfolder]: 3406/6305 cut-off events. [2023-01-28 05:23:15,189 INFO L131 PetriNetUnfolder]: For 66975/66975 co-relation queries the response was YES. [2023-01-28 05:23:15,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27437 conditions, 6305 events. 3406/6305 cut-off events. For 66975/66975 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 46403 event pairs, 320 based on Foata normal form. 39/6344 useless extension candidates. Maximal degree in co-relation 27367. Up to 1369 conditions per place. [2023-01-28 05:23:15,235 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 188 selfloop transitions, 238 changer transitions 154/580 dead transitions. [2023-01-28 05:23:15,235 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 580 transitions, 7298 flow [2023-01-28 05:23:15,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 05:23:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 05:23:15,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3406 transitions. [2023-01-28 05:23:15,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3012026883622214 [2023-01-28 05:23:15,241 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3406 transitions. [2023-01-28 05:23:15,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3406 transitions. [2023-01-28 05:23:15,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:23:15,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3406 transitions. [2023-01-28 05:23:15,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 77.4090909090909) internal successors, (3406), 44 states have internal predecessors, (3406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:15,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 257.0) internal successors, (11565), 45 states have internal predecessors, (11565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:15,255 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 257.0) internal successors, (11565), 45 states have internal predecessors, (11565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:15,255 INFO L175 Difference]: Start difference. First operand has 240 places, 177 transitions, 2612 flow. Second operand 44 states and 3406 transitions. [2023-01-28 05:23:15,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 580 transitions, 7298 flow [2023-01-28 05:23:15,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 580 transitions, 6305 flow, removed 418 selfloop flow, removed 40 redundant places. [2023-01-28 05:23:15,445 INFO L231 Difference]: Finished difference. Result has 179 places, 310 transitions, 5079 flow [2023-01-28 05:23:15,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=2151, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5079, PETRI_PLACES=179, PETRI_TRANSITIONS=310} [2023-01-28 05:23:15,445 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 159 predicate places. [2023-01-28 05:23:15,445 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 310 transitions, 5079 flow [2023-01-28 05:23:15,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 71.81818181818181) internal successors, (2370), 33 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:15,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:23:15,446 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:23:15,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 05:23:15,646 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,SelfDestructingSolverStorable13 [2023-01-28 05:23:15,647 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:23:15,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:23:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash 530970796, now seen corresponding path program 12 times [2023-01-28 05:23:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:23:15,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831428837] [2023-01-28 05:23:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:23:15,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:23:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:23:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:23:17,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:23:17,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831428837] [2023-01-28 05:23:17,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831428837] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:23:17,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040817844] [2023-01-28 05:23:17,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:23:17,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:23:17,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:23:17,649 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:23:17,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 05:23:17,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:23:17,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:23:17,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 71 conjunts are in the unsatisfiable core [2023-01-28 05:23:17,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:23:18,028 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 11 treesize of output 7 [2023-01-28 05:23:18,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:23:18,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:23:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:23:18,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:23:20,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:23:20,270 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 243 treesize of output 159 [2023-01-28 05:23:20,391 INFO L321 Elim1Store]: treesize reduction 60, result has 60.8 percent of original size [2023-01-28 05:23:20,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 990 [2023-01-28 05:23:20,424 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:23:20,425 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:23:20,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:23:20,429 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:23:20,430 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:23:20,432 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:23:20,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:23:20,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 340 treesize of output 378 [2023-01-28 05:23:20,577 INFO L321 Elim1Store]: treesize reduction 60, result has 60.8 percent of original size [2023-01-28 05:23:20,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 323 [2023-01-28 05:23:27,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:23:27,176 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 243 treesize of output 159 [2023-01-28 05:23:27,212 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 05:23:27,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 440 [2023-01-28 05:23:27,274 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 05:23:27,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 332 [2023-01-28 05:23:27,334 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 05:23:27,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 247 [2023-01-28 05:23:27,571 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 05:23:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:23:27,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040817844] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:23:27,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:23:27,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2023-01-28 05:23:27,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967510714] [2023-01-28 05:23:27,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:23:27,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-01-28 05:23:27,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:23:27,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-01-28 05:23:27,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1734, Unknown=7, NotChecked=0, Total=2256 [2023-01-28 05:23:27,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 05:23:27,829 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 310 transitions, 5079 flow. Second operand has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:27,829 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:23:27,829 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 05:23:27,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:23:44,781 WARN L222 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 98 DAG size of output: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:23:52,751 INFO L130 PetriNetUnfolder]: 7618/14277 cut-off events. [2023-01-28 05:23:52,752 INFO L131 PetriNetUnfolder]: For 130775/130775 co-relation queries the response was YES. [2023-01-28 05:23:52,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65587 conditions, 14277 events. 7618/14277 cut-off events. For 130775/130775 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 119197 event pairs, 1504 based on Foata normal form. 216/14493 useless extension candidates. Maximal degree in co-relation 65525. Up to 5684 conditions per place. [2023-01-28 05:23:52,828 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 551 selfloop transitions, 462 changer transitions 200/1213 dead transitions. [2023-01-28 05:23:52,828 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1213 transitions, 17979 flow [2023-01-28 05:23:52,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-01-28 05:23:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-01-28 05:23:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6608 transitions. [2023-01-28 05:23:52,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30249485008010984 [2023-01-28 05:23:52,840 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6608 transitions. [2023-01-28 05:23:52,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6608 transitions. [2023-01-28 05:23:52,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:23:52,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6608 transitions. [2023-01-28 05:23:52,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 77.74117647058823) internal successors, (6608), 85 states have internal predecessors, (6608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:52,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:52,864 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:52,864 INFO L175 Difference]: Start difference. First operand has 179 places, 310 transitions, 5079 flow. Second operand 85 states and 6608 transitions. [2023-01-28 05:23:52,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1213 transitions, 17979 flow [2023-01-28 05:23:53,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1213 transitions, 17196 flow, removed 356 selfloop flow, removed 13 redundant places. [2023-01-28 05:23:53,315 INFO L231 Difference]: Finished difference. Result has 297 places, 733 transitions, 13889 flow [2023-01-28 05:23:53,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=4584, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=13889, PETRI_PLACES=297, PETRI_TRANSITIONS=733} [2023-01-28 05:23:53,316 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 277 predicate places. [2023-01-28 05:23:53,316 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 733 transitions, 13889 flow [2023-01-28 05:23:53,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:23:53,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:23:53,317 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:23:53,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 05:23:53,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 05:23:53,517 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:23:53,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:23:53,518 INFO L85 PathProgramCache]: Analyzing trace with hash 630946832, now seen corresponding path program 13 times [2023-01-28 05:23:53,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:23:53,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227888029] [2023-01-28 05:23:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:23:53,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:23:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:23:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:23:55,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:23:55,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227888029] [2023-01-28 05:23:55,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227888029] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:23:55,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162037978] [2023-01-28 05:23:55,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:23:55,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:23:55,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:23:55,789 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:23:55,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 05:23:55,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:23:55,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 05:23:55,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:23:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:23:56,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:23:57,512 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-28 05:23:57,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 330 [2023-01-28 05:24:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:01,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162037978] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:24:01,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:24:01,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-01-28 05:24:01,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625454495] [2023-01-28 05:24:01,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:24:01,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 05:24:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 05:24:01,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1741, Unknown=0, NotChecked=0, Total=2070 [2023-01-28 05:24:01,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 05:24:01,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 733 transitions, 13889 flow. Second operand has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:01,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:01,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 05:24:01,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:18,728 INFO L130 PetriNetUnfolder]: 15210/28176 cut-off events. [2023-01-28 05:24:18,728 INFO L131 PetriNetUnfolder]: For 678225/678225 co-relation queries the response was YES. [2023-01-28 05:24:19,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145091 conditions, 28176 events. 15210/28176 cut-off events. For 678225/678225 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 261643 event pairs, 3348 based on Foata normal form. 112/28288 useless extension candidates. Maximal degree in co-relation 144982. Up to 10616 conditions per place. [2023-01-28 05:24:19,306 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 948 selfloop transitions, 845 changer transitions 317/2110 dead transitions. [2023-01-28 05:24:19,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 2110 transitions, 36687 flow [2023-01-28 05:24:19,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-01-28 05:24:19,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-01-28 05:24:19,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 7410 transitions. [2023-01-28 05:24:19,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3035019455252918 [2023-01-28 05:24:19,316 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 7410 transitions. [2023-01-28 05:24:19,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 7410 transitions. [2023-01-28 05:24:19,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:19,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 7410 transitions. [2023-01-28 05:24:19,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 78.0) internal successors, (7410), 95 states have internal predecessors, (7410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:19,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 257.0) internal successors, (24672), 96 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:19,344 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 257.0) internal successors, (24672), 96 states have internal predecessors, (24672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:19,345 INFO L175 Difference]: Start difference. First operand has 297 places, 733 transitions, 13889 flow. Second operand 95 states and 7410 transitions. [2023-01-28 05:24:19,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 2110 transitions, 36687 flow [2023-01-28 05:24:22,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 2110 transitions, 33019 flow, removed 1805 selfloop flow, removed 15 redundant places. [2023-01-28 05:24:22,681 INFO L231 Difference]: Finished difference. Result has 426 places, 1479 transitions, 28687 flow [2023-01-28 05:24:22,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=11739, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=733, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=28687, PETRI_PLACES=426, PETRI_TRANSITIONS=1479} [2023-01-28 05:24:22,682 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 406 predicate places. [2023-01-28 05:24:22,682 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1479 transitions, 28687 flow [2023-01-28 05:24:22,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:22,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:22,683 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:22,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 05:24:22,883 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,SelfDestructingSolverStorable15 [2023-01-28 05:24:22,884 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:22,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:22,884 INFO L85 PathProgramCache]: Analyzing trace with hash -988246562, now seen corresponding path program 14 times [2023-01-28 05:24:22,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:22,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173115374] [2023-01-28 05:24:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:22,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:25,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:25,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173115374] [2023-01-28 05:24:25,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173115374] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:24:25,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797834752] [2023-01-28 05:24:25,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:24:25,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:25,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:24:25,395 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:24:25,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 05:24:25,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:24:25,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:24:25,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 60 conjunts are in the unsatisfiable core [2023-01-28 05:24:25,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:24:25,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 05:24:25,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:24:25,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:24:26,217 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:26,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:24:27,731 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:24:27,732 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 243 treesize of output 159 [2023-01-28 05:24:27,828 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:24:27,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 576 [2023-01-28 05:24:27,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:24:27,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 468 [2023-01-28 05:24:28,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:24:28,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 383 [2023-01-28 05:25:01,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:25:01,316 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 243 treesize of output 159 [2023-01-28 05:25:01,362 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 05:25:01,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 440 [2023-01-28 05:25:01,409 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 05:25:01,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 332 [2023-01-28 05:25:01,459 INFO L321 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-01-28 05:25:01,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 247 [2023-01-28 05:25:01,638 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 05:25:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:25:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797834752] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:25:01,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:25:01,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2023-01-28 05:25:01,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828085613] [2023-01-28 05:25:01,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:25:01,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-01-28 05:25:01,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:25:01,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-01-28 05:25:01,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1929, Unknown=6, NotChecked=0, Total=2352 [2023-01-28 05:25:01,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 05:25:01,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1479 transitions, 28687 flow. Second operand has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:01,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:25:01,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 05:25:01,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:25:04,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:25:31,006 INFO L130 PetriNetUnfolder]: 19666/36666 cut-off events. [2023-01-28 05:25:31,006 INFO L131 PetriNetUnfolder]: For 1941337/1941337 co-relation queries the response was YES. [2023-01-28 05:25:32,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213725 conditions, 36666 events. 19666/36666 cut-off events. For 1941337/1941337 co-relation queries the response was YES. Maximal size of possible extension queue 1921. Compared 351581 event pairs, 5308 based on Foata normal form. 404/37070 useless extension candidates. Maximal degree in co-relation 213566. Up to 15462 conditions per place. [2023-01-28 05:25:32,278 INFO L137 encePairwiseOnDemand]: 249/257 looper letters, 1381 selfloop transitions, 904 changer transitions 229/2514 dead transitions. [2023-01-28 05:25:32,278 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 2514 transitions, 52647 flow [2023-01-28 05:25:32,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-01-28 05:25:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-01-28 05:25:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 5974 transitions. [2023-01-28 05:25:32,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3018848855424731 [2023-01-28 05:25:32,283 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 5974 transitions. [2023-01-28 05:25:32,283 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 5974 transitions. [2023-01-28 05:25:32,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:25:32,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 5974 transitions. [2023-01-28 05:25:32,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 77.58441558441558) internal successors, (5974), 77 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:32,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 257.0) internal successors, (20046), 78 states have internal predecessors, (20046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:32,306 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 257.0) internal successors, (20046), 78 states have internal predecessors, (20046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:32,306 INFO L175 Difference]: Start difference. First operand has 426 places, 1479 transitions, 28687 flow. Second operand 77 states and 5974 transitions. [2023-01-28 05:25:32,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 2514 transitions, 52647 flow [2023-01-28 05:25:43,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 2514 transitions, 41521 flow, removed 5532 selfloop flow, removed 16 redundant places. [2023-01-28 05:25:43,247 INFO L231 Difference]: Finished difference. Result has 519 places, 1751 transitions, 32210 flow [2023-01-28 05:25:43,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=19046, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=32210, PETRI_PLACES=519, PETRI_TRANSITIONS=1751} [2023-01-28 05:25:43,249 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 499 predicate places. [2023-01-28 05:25:43,249 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1751 transitions, 32210 flow [2023-01-28 05:25:43,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 71.42857142857143) internal successors, (3500), 49 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:43,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:25:43,250 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:25:43,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 05:25:43,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:25:43,451 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:25:43,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:25:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash -349342824, now seen corresponding path program 15 times [2023-01-28 05:25:43,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:25:43,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568933597] [2023-01-28 05:25:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:25:43,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:25:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:25:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:25:45,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:25:45,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568933597] [2023-01-28 05:25:45,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568933597] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:25:45,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158146972] [2023-01-28 05:25:45,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:25:45,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:25:45,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:25:45,150 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:25:45,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 05:25:45,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 05:25:45,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:25:45,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 05:25:45,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:25:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:25:46,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:25:47,244 INFO L321 Elim1Store]: treesize reduction 82, result has 54.7 percent of original size [2023-01-28 05:25:47,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 328 treesize of output 272 [2023-01-28 05:25:48,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:25:48,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158146972] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:25:48,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:25:48,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-01-28 05:25:48,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138827419] [2023-01-28 05:25:48,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:25:48,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 05:25:48,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:25:48,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 05:25:48,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=1568, Unknown=0, NotChecked=0, Total=2070 [2023-01-28 05:25:48,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 05:25:48,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1751 transitions, 32210 flow. Second operand has 46 states, 46 states have (on average 78.5) internal successors, (3611), 46 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:48,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:25:48,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 05:25:48,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:26:19,142 INFO L130 PetriNetUnfolder]: 20662/38461 cut-off events. [2023-01-28 05:26:19,143 INFO L131 PetriNetUnfolder]: For 2805714/2805714 co-relation queries the response was YES. [2023-01-28 05:26:20,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220486 conditions, 38461 events. 20662/38461 cut-off events. For 2805714/2805714 co-relation queries the response was YES. Maximal size of possible extension queue 2027. Compared 368011 event pairs, 6602 based on Foata normal form. 205/38666 useless extension candidates. Maximal degree in co-relation 220284. Up to 27399 conditions per place. [2023-01-28 05:26:20,786 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 1680 selfloop transitions, 590 changer transitions 262/2532 dead transitions. [2023-01-28 05:26:20,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 2532 transitions, 53550 flow [2023-01-28 05:26:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-01-28 05:26:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2023-01-28 05:26:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 8802 transitions. [2023-01-28 05:26:20,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.332514827547127 [2023-01-28 05:26:20,798 INFO L72 ComplementDD]: Start complementDD. Operand 103 states and 8802 transitions. [2023-01-28 05:26:20,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 103 states and 8802 transitions. [2023-01-28 05:26:20,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:26:20,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 103 states and 8802 transitions. [2023-01-28 05:26:20,813 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 104 states, 103 states have (on average 85.45631067961165) internal successors, (8802), 103 states have internal predecessors, (8802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:20,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 104 states, 104 states have (on average 257.0) internal successors, (26728), 104 states have internal predecessors, (26728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:20,837 INFO L81 ComplementDD]: Finished complementDD. Result has 104 states, 104 states have (on average 257.0) internal successors, (26728), 104 states have internal predecessors, (26728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:20,837 INFO L175 Difference]: Start difference. First operand has 519 places, 1751 transitions, 32210 flow. Second operand 103 states and 8802 transitions. [2023-01-28 05:26:20,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 2532 transitions, 53550 flow [2023-01-28 05:26:40,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 577 places, 2532 transitions, 51031 flow, removed 1216 selfloop flow, removed 32 redundant places. [2023-01-28 05:26:40,682 INFO L231 Difference]: Finished difference. Result has 638 places, 1881 transitions, 37814 flow [2023-01-28 05:26:40,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=26631, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=37814, PETRI_PLACES=638, PETRI_TRANSITIONS=1881} [2023-01-28 05:26:40,684 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 618 predicate places. [2023-01-28 05:26:40,684 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 1881 transitions, 37814 flow [2023-01-28 05:26:40,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 78.5) internal successors, (3611), 46 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:40,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:26:40,685 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:26:40,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 05:26:40,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 05:26:40,893 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:26:40,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:26:40,894 INFO L85 PathProgramCache]: Analyzing trace with hash 527195898, now seen corresponding path program 16 times [2023-01-28 05:26:40,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:26:40,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665798208] [2023-01-28 05:26:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:26:40,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:26:40,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:26:43,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:43,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:26:43,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665798208] [2023-01-28 05:26:43,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665798208] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:26:43,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581485437] [2023-01-28 05:26:43,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:26:43,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:26:43,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:26:43,026 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:26:43,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 05:26:43,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:26:43,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:26:43,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 05:26:43,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:26:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:43,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:26:44,751 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-28 05:26:44,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 330 [2023-01-28 05:26:48,432 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:48,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581485437] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:26:48,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:26:48,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 44 [2023-01-28 05:26:48,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292322078] [2023-01-28 05:26:48,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:26:48,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 05:26:48,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:26:48,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 05:26:48,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1749, Unknown=0, NotChecked=0, Total=2070 [2023-01-28 05:26:48,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 257 [2023-01-28 05:26:48,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 1881 transitions, 37814 flow. Second operand has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:48,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:26:48,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 257 [2023-01-28 05:26:48,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:27:28,399 INFO L130 PetriNetUnfolder]: 27522/50921 cut-off events. [2023-01-28 05:27:28,400 INFO L131 PetriNetUnfolder]: For 5746050/5746050 co-relation queries the response was YES. [2023-01-28 05:27:30,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301812 conditions, 50921 events. 27522/50921 cut-off events. For 5746050/5746050 co-relation queries the response was YES. Maximal size of possible extension queue 2568. Compared 502679 event pairs, 11066 based on Foata normal form. 74/50995 useless extension candidates. Maximal degree in co-relation 301558. Up to 36072 conditions per place. [2023-01-28 05:27:31,198 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 2196 selfloop transitions, 616 changer transitions 260/3072 dead transitions. [2023-01-28 05:27:31,198 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 710 places, 3072 transitions, 61273 flow [2023-01-28 05:27:31,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-01-28 05:27:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-01-28 05:27:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 6613 transitions. [2023-01-28 05:27:31,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3027237354085603 [2023-01-28 05:27:31,205 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 6613 transitions. [2023-01-28 05:27:31,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 6613 transitions. [2023-01-28 05:27:31,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:27:31,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 6613 transitions. [2023-01-28 05:27:31,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 77.8) internal successors, (6613), 85 states have internal predecessors, (6613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:31,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:31,236 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 257.0) internal successors, (22102), 86 states have internal predecessors, (22102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:31,237 INFO L175 Difference]: Start difference. First operand has 638 places, 1881 transitions, 37814 flow. Second operand 85 states and 6613 transitions. [2023-01-28 05:27:31,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 710 places, 3072 transitions, 61273 flow [2023-01-28 05:28:11,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 685 places, 3072 transitions, 56632 flow, removed 2289 selfloop flow, removed 25 redundant places. [2023-01-28 05:28:11,447 INFO L231 Difference]: Finished difference. Result has 720 places, 2370 transitions, 44708 flow [2023-01-28 05:28:11,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=33699, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=44708, PETRI_PLACES=720, PETRI_TRANSITIONS=2370} [2023-01-28 05:28:11,449 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 700 predicate places. [2023-01-28 05:28:11,449 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 2370 transitions, 44708 flow [2023-01-28 05:28:11,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 71.52173913043478) internal successors, (3290), 46 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:28:11,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:28:11,450 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:28:11,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 05:28:11,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:28:11,650 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:28:11,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:28:11,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1851597076, now seen corresponding path program 17 times [2023-01-28 05:28:11,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:28:11,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919147606] [2023-01-28 05:28:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:28:11,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:28:11,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:28:13,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:28:13,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:28:13,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919147606] [2023-01-28 05:28:13,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919147606] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:28:13,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236687842] [2023-01-28 05:28:13,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:28:13,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:28:13,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:28:13,248 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:28:13,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 05:28:13,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:28:13,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:28:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 05:28:13,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:28:13,907 INFO L321 Elim1Store]: treesize reduction 142, result has 8.4 percent of original size [2023-01-28 05:28:13,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 95 treesize of output 36 [2023-01-28 05:28:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:28:13,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:28:14,955 INFO L321 Elim1Store]: treesize reduction 82, result has 54.7 percent of original size [2023-01-28 05:28:14,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 318 treesize of output 262 [2023-01-28 05:28:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 05:28:15,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236687842] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:28:15,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:28:15,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 9] total 35 [2023-01-28 05:28:15,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437222761] [2023-01-28 05:28:15,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:28:15,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 05:28:15,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:28:15,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 05:28:15,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 05:28:15,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 05:28:15,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 2370 transitions, 44708 flow. Second operand has 37 states, 37 states have (on average 78.78378378378379) internal successors, (2915), 37 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:28:15,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:28:15,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 05:28:15,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:29:05,749 INFO L130 PetriNetUnfolder]: 34000/62896 cut-off events. [2023-01-28 05:29:05,750 INFO L131 PetriNetUnfolder]: For 7292580/7292580 co-relation queries the response was YES. [2023-01-28 05:29:09,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369644 conditions, 62896 events. 34000/62896 cut-off events. For 7292580/7292580 co-relation queries the response was YES. Maximal size of possible extension queue 3402. Compared 643809 event pairs, 10596 based on Foata normal form. 216/63112 useless extension candidates. Maximal degree in co-relation 369371. Up to 45042 conditions per place. [2023-01-28 05:29:09,622 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 2267 selfloop transitions, 920 changer transitions 191/3378 dead transitions. [2023-01-28 05:29:09,623 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 785 places, 3378 transitions, 70256 flow [2023-01-28 05:29:09,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-01-28 05:29:09,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-01-28 05:29:09,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5612 transitions. [2023-01-28 05:29:09,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33085721023464215 [2023-01-28 05:29:09,627 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5612 transitions. [2023-01-28 05:29:09,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5612 transitions. [2023-01-28 05:29:09,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:29:09,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5612 transitions. [2023-01-28 05:29:09,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 85.03030303030303) internal successors, (5612), 66 states have internal predecessors, (5612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:09,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 257.0) internal successors, (17219), 67 states have internal predecessors, (17219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:09,647 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 257.0) internal successors, (17219), 67 states have internal predecessors, (17219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:09,647 INFO L175 Difference]: Start difference. First operand has 720 places, 2370 transitions, 44708 flow. Second operand 66 states and 5612 transitions. [2023-01-28 05:29:09,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 785 places, 3378 transitions, 70256 flow [2023-01-28 05:30:17,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 770 places, 3378 transitions, 68724 flow, removed 746 selfloop flow, removed 15 redundant places. [2023-01-28 05:30:17,631 INFO L231 Difference]: Finished difference. Result has 808 places, 2967 transitions, 59533 flow [2023-01-28 05:30:17,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=43238, PETRI_DIFFERENCE_MINUEND_PLACES=705, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=59533, PETRI_PLACES=808, PETRI_TRANSITIONS=2967} [2023-01-28 05:30:17,634 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 788 predicate places. [2023-01-28 05:30:17,634 INFO L495 AbstractCegarLoop]: Abstraction has has 808 places, 2967 transitions, 59533 flow [2023-01-28 05:30:17,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 78.78378378378379) internal successors, (2915), 37 states have internal predecessors, (2915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:17,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:30:17,635 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:30:17,643 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-28 05:30:17,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:30:17,841 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:30:17,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:30:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1542947051, now seen corresponding path program 18 times [2023-01-28 05:30:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:30:17,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048047874] [2023-01-28 05:30:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:30:17,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:30:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:30:18,032 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:30:18,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:30:18,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048047874] [2023-01-28 05:30:18,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048047874] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:30:18,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961400391] [2023-01-28 05:30:18,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:30:18,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:30:18,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:30:18,034 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:30:18,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 05:30:18,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 05:30:18,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:30:18,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 05:30:18,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:30:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:30:18,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:30:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:30:18,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961400391] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:30:18,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:30:18,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-01-28 05:30:18,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316999246] [2023-01-28 05:30:18,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:30:18,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 05:30:18,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:30:18,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 05:30:18,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 05:30:18,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 257 [2023-01-28 05:30:18,632 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 808 places, 2967 transitions, 59533 flow. Second operand has 35 states, 35 states have (on average 94.68571428571428) internal successors, (3314), 35 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:18,632 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:30:18,632 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 257 [2023-01-28 05:30:18,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:30:38,382 INFO L130 PetriNetUnfolder]: 12580/24011 cut-off events. [2023-01-28 05:30:38,382 INFO L131 PetriNetUnfolder]: For 1635197/1635203 co-relation queries the response was YES. [2023-01-28 05:30:39,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140535 conditions, 24011 events. 12580/24011 cut-off events. For 1635197/1635203 co-relation queries the response was YES. Maximal size of possible extension queue 1659. Compared 228343 event pairs, 4090 based on Foata normal form. 920/24915 useless extension candidates. Maximal degree in co-relation 140224. Up to 14116 conditions per place. [2023-01-28 05:30:39,171 INFO L137 encePairwiseOnDemand]: 252/257 looper letters, 758 selfloop transitions, 38 changer transitions 352/1154 dead transitions. [2023-01-28 05:30:39,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 1154 transitions, 28097 flow [2023-01-28 05:30:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 05:30:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 05:30:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1483 transitions. [2023-01-28 05:30:39,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3846952010376135 [2023-01-28 05:30:39,172 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1483 transitions. [2023-01-28 05:30:39,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1483 transitions. [2023-01-28 05:30:39,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:30:39,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1483 transitions. [2023-01-28 05:30:39,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 98.86666666666666) internal successors, (1483), 15 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:39,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:39,177 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 257.0) internal successors, (4112), 16 states have internal predecessors, (4112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:39,177 INFO L175 Difference]: Start difference. First operand has 808 places, 2967 transitions, 59533 flow. Second operand 15 states and 1483 transitions. [2023-01-28 05:30:39,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 1154 transitions, 28097 flow [2023-01-28 05:30:59,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 1154 transitions, 25372 flow, removed 1117 selfloop flow, removed 109 redundant places. [2023-01-28 05:30:59,225 INFO L231 Difference]: Finished difference. Result has 636 places, 777 transitions, 16666 flow [2023-01-28 05:30:59,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=22078, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1046, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=16666, PETRI_PLACES=636, PETRI_TRANSITIONS=777} [2023-01-28 05:30:59,227 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 616 predicate places. [2023-01-28 05:30:59,227 INFO L495 AbstractCegarLoop]: Abstraction has has 636 places, 777 transitions, 16666 flow [2023-01-28 05:30:59,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 94.68571428571428) internal successors, (3314), 35 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:59,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:30:59,228 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:30:59,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 05:30:59,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:30:59,439 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:30:59,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:30:59,439 INFO L85 PathProgramCache]: Analyzing trace with hash 469619336, now seen corresponding path program 19 times [2023-01-28 05:30:59,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:30:59,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954829635] [2023-01-28 05:30:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:30:59,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:30:59,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:31:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:31:02,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:31:02,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954829635] [2023-01-28 05:31:02,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954829635] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:31:02,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562402259] [2023-01-28 05:31:02,118 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:31:02,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:31:02,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:31:02,119 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:31:02,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 05:31:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:31:02,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 05:31:02,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:31:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:31:02,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:31:03,565 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-28 05:31:03,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 312 treesize of output 310 [2023-01-28 05:31:06,275 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 05:31:06,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562402259] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:31:06,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:31:06,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 9] total 39 [2023-01-28 05:31:06,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373680611] [2023-01-28 05:31:06,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:31:06,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 05:31:06,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:31:06,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 05:31:06,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 05:31:06,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 05:31:06,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 636 places, 777 transitions, 16666 flow. Second operand has 41 states, 41 states have (on average 78.6829268292683) internal successors, (3226), 41 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:31:06,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:31:06,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 05:31:06,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:31:21,410 INFO L130 PetriNetUnfolder]: 12760/23564 cut-off events. [2023-01-28 05:31:21,410 INFO L131 PetriNetUnfolder]: For 1899005/1899005 co-relation queries the response was YES. [2023-01-28 05:31:21,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140022 conditions, 23564 events. 12760/23564 cut-off events. For 1899005/1899005 co-relation queries the response was YES. Maximal size of possible extension queue 1466. Compared 212762 event pairs, 2499 based on Foata normal form. 147/23711 useless extension candidates. Maximal degree in co-relation 139778. Up to 8636 conditions per place. [2023-01-28 05:31:21,977 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 649 selfloop transitions, 695 changer transitions 237/1581 dead transitions. [2023-01-28 05:31:21,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1581 transitions, 32962 flow [2023-01-28 05:31:21,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-28 05:31:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-28 05:31:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 5521 transitions. [2023-01-28 05:31:21,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3304998503442083 [2023-01-28 05:31:21,981 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 5521 transitions. [2023-01-28 05:31:21,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 5521 transitions. [2023-01-28 05:31:21,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:31:21,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 5521 transitions. [2023-01-28 05:31:21,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 84.93846153846154) internal successors, (5521), 65 states have internal predecessors, (5521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:31:21,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 257.0) internal successors, (16962), 66 states have internal predecessors, (16962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:31:21,995 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 257.0) internal successors, (16962), 66 states have internal predecessors, (16962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:31:21,995 INFO L175 Difference]: Start difference. First operand has 636 places, 777 transitions, 16666 flow. Second operand 65 states and 5521 transitions. [2023-01-28 05:31:21,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1581 transitions, 32962 flow [2023-01-28 05:31:29,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 1581 transitions, 31012 flow, removed 685 selfloop flow, removed 148 redundant places. [2023-01-28 05:31:29,895 INFO L231 Difference]: Finished difference. Result has 464 places, 1150 transitions, 28110 flow [2023-01-28 05:31:29,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=15548, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=28110, PETRI_PLACES=464, PETRI_TRANSITIONS=1150} [2023-01-28 05:31:29,896 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 444 predicate places. [2023-01-28 05:31:29,896 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 1150 transitions, 28110 flow [2023-01-28 05:31:29,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 78.6829268292683) internal successors, (3226), 41 states have internal predecessors, (3226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:31:29,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:31:29,896 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:31:29,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-01-28 05:31:30,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:31:30,099 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:31:30,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:31:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1168651819, now seen corresponding path program 20 times [2023-01-28 05:31:30,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:31:30,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163597794] [2023-01-28 05:31:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:31:30,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:31:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:31:31,896 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:31:31,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:31:31,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163597794] [2023-01-28 05:31:31,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163597794] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:31:31,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210469923] [2023-01-28 05:31:31,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:31:31,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:31:31,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:31:31,897 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:31:31,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 05:31:32,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:31:32,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:31:32,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-28 05:31:32,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:31:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:31:32,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:31:33,898 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-28 05:31:33,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 330 [2023-01-28 05:31:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:31:35,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210469923] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:31:35,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:31:35,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 50 [2023-01-28 05:31:35,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297695948] [2023-01-28 05:31:35,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:31:35,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-01-28 05:31:35,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:31:35,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-01-28 05:31:35,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=2195, Unknown=0, NotChecked=0, Total=2652 [2023-01-28 05:31:35,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 05:31:35,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 1150 transitions, 28110 flow. Second operand has 52 states, 52 states have (on average 78.46153846153847) internal successors, (4080), 52 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:31:35,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:31:35,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 05:31:35,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:32:40,063 INFO L130 PetriNetUnfolder]: 31092/57037 cut-off events. [2023-01-28 05:32:40,063 INFO L131 PetriNetUnfolder]: For 3935594/3935594 co-relation queries the response was YES. [2023-01-28 05:32:42,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474471 conditions, 57037 events. 31092/57037 cut-off events. For 3935594/3935594 co-relation queries the response was YES. Maximal size of possible extension queue 2602. Compared 559275 event pairs, 5003 based on Foata normal form. 206/57243 useless extension candidates. Maximal degree in co-relation 474280. Up to 18141 conditions per place. [2023-01-28 05:32:42,327 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 2151 selfloop transitions, 1873 changer transitions 967/4991 dead transitions. [2023-01-28 05:32:42,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 811 places, 4991 transitions, 129067 flow [2023-01-28 05:32:42,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 348 states. [2023-01-28 05:32:42,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2023-01-28 05:32:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 29813 transitions. [2023-01-28 05:32:42,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33334451451317143 [2023-01-28 05:32:42,344 INFO L72 ComplementDD]: Start complementDD. Operand 348 states and 29813 transitions. [2023-01-28 05:32:42,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 348 states and 29813 transitions. [2023-01-28 05:32:42,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:32:42,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 348 states and 29813 transitions. [2023-01-28 05:32:42,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 349 states, 348 states have (on average 85.66954022988506) internal successors, (29813), 348 states have internal predecessors, (29813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:32:42,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 349 states, 349 states have (on average 257.0) internal successors, (89693), 349 states have internal predecessors, (89693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:32:42,450 INFO L81 ComplementDD]: Finished complementDD. Result has 349 states, 349 states have (on average 257.0) internal successors, (89693), 349 states have internal predecessors, (89693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:32:42,451 INFO L175 Difference]: Start difference. First operand has 464 places, 1150 transitions, 28110 flow. Second operand 348 states and 29813 transitions. [2023-01-28 05:32:42,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 811 places, 4991 transitions, 129067 flow [2023-01-28 05:33:03,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 4991 transitions, 120475 flow, removed 4152 selfloop flow, removed 16 redundant places. [2023-01-28 05:33:03,582 INFO L231 Difference]: Finished difference. Result has 997 places, 2784 transitions, 90394 flow [2023-01-28 05:33:03,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=25428, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=348, PETRI_FLOW=90394, PETRI_PLACES=997, PETRI_TRANSITIONS=2784} [2023-01-28 05:33:03,584 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 977 predicate places. [2023-01-28 05:33:03,584 INFO L495 AbstractCegarLoop]: Abstraction has has 997 places, 2784 transitions, 90394 flow [2023-01-28 05:33:03,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 78.46153846153847) internal successors, (4080), 52 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:33:03,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:33:03,585 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:33:03,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 05:33:03,791 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,SelfDestructingSolverStorable22 [2023-01-28 05:33:03,791 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:33:03,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:33:03,791 INFO L85 PathProgramCache]: Analyzing trace with hash -678070836, now seen corresponding path program 21 times [2023-01-28 05:33:03,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:33:03,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724370769] [2023-01-28 05:33:03,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:33:03,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:33:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:33:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 05:33:03,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:33:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724370769] [2023-01-28 05:33:03,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724370769] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:33:03,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305897305] [2023-01-28 05:33:03,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:33:03,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:33:03,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:33:04,001 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:33:04,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 05:33:04,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 05:33:04,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:33:04,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 05:33:04,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:33:05,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:33:05,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 682 treesize of output 380 [2023-01-28 05:33:05,665 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 05:33:05,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:33:06,672 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-01-28 05:33:06,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 752 treesize of output 452 [2023-01-28 05:33:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 05:33:06,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305897305] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:33:06,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:33:06,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2023-01-28 05:33:06,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741689487] [2023-01-28 05:33:06,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:33:06,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 05:33:06,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:33:06,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 05:33:06,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=811, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 05:33:06,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 257 [2023-01-28 05:33:06,812 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 997 places, 2784 transitions, 90394 flow. Second operand has 33 states, 33 states have (on average 88.63636363636364) internal successors, (2925), 33 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:33:06,812 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:33:06,812 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 257 [2023-01-28 05:33:06,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:33:32,909 INFO L130 PetriNetUnfolder]: 13206/24917 cut-off events. [2023-01-28 05:33:32,910 INFO L131 PetriNetUnfolder]: For 3591597/3591603 co-relation queries the response was YES. [2023-01-28 05:33:34,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163846 conditions, 24917 events. 13206/24917 cut-off events. For 3591597/3591603 co-relation queries the response was YES. Maximal size of possible extension queue 1472. Compared 232265 event pairs, 8529 based on Foata normal form. 642/25539 useless extension candidates. Maximal degree in co-relation 163455. Up to 20452 conditions per place. [2023-01-28 05:33:34,770 INFO L137 encePairwiseOnDemand]: 253/257 looper letters, 1094 selfloop transitions, 63 changer transitions 93/1256 dead transitions. [2023-01-28 05:33:34,771 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 1256 transitions, 32209 flow [2023-01-28 05:33:34,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 05:33:34,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 05:33:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1767 transitions. [2023-01-28 05:33:34,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36186770428015563 [2023-01-28 05:33:34,773 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1767 transitions. [2023-01-28 05:33:34,773 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1767 transitions. [2023-01-28 05:33:34,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:33:34,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1767 transitions. [2023-01-28 05:33:34,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 93.0) internal successors, (1767), 19 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:33:34,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:33:34,778 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 257.0) internal successors, (5140), 20 states have internal predecessors, (5140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:33:34,778 INFO L175 Difference]: Start difference. First operand has 997 places, 2784 transitions, 90394 flow. Second operand 19 states and 1767 transitions. [2023-01-28 05:33:34,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 1256 transitions, 32209 flow [2023-01-28 05:33:54,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1256 transitions, 30200 flow, removed 916 selfloop flow, removed 202 redundant places. [2023-01-28 05:33:55,001 INFO L231 Difference]: Finished difference. Result has 505 places, 1104 transitions, 25965 flow [2023-01-28 05:33:55,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=25866, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1050, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=25965, PETRI_PLACES=505, PETRI_TRANSITIONS=1104} [2023-01-28 05:33:55,002 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 485 predicate places. [2023-01-28 05:33:55,002 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 1104 transitions, 25965 flow [2023-01-28 05:33:55,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 88.63636363636364) internal successors, (2925), 33 states have internal predecessors, (2925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:33:55,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:33:55,003 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:33:55,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-28 05:33:55,203 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,SelfDestructingSolverStorable23 [2023-01-28 05:33:55,203 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:33:55,204 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:33:55,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1274363683, now seen corresponding path program 22 times [2023-01-28 05:33:55,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:33:55,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541130775] [2023-01-28 05:33:55,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:33:55,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:33:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:33:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:33:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:33:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541130775] [2023-01-28 05:33:56,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541130775] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:33:56,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972625486] [2023-01-28 05:33:56,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:33:56,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:33:56,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:33:56,840 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:33:56,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 05:33:56,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:33:56,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:33:56,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-28 05:33:56,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:33:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-01-28 05:33:57,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:33:58,207 INFO L321 Elim1Store]: treesize reduction 28, result has 84.5 percent of original size [2023-01-28 05:33:58,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 312 treesize of output 310 [2023-01-28 05:34:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-01-28 05:34:00,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972625486] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:34:00,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:34:00,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11, 9] total 37 [2023-01-28 05:34:00,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599605968] [2023-01-28 05:34:00,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:34:00,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 05:34:00,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:34:00,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 05:34:00,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2023-01-28 05:34:00,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 05:34:00,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 1104 transitions, 25965 flow. Second operand has 39 states, 39 states have (on average 78.76923076923077) internal successors, (3072), 39 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:34:00,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:34:00,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 05:34:00,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:34:18,116 INFO L130 PetriNetUnfolder]: 14569/27236 cut-off events. [2023-01-28 05:34:18,117 INFO L131 PetriNetUnfolder]: For 946370/946370 co-relation queries the response was YES. [2023-01-28 05:34:18,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166230 conditions, 27236 events. 14569/27236 cut-off events. For 946370/946370 co-relation queries the response was YES. Maximal size of possible extension queue 1614. Compared 252823 event pairs, 3064 based on Foata normal form. 28/27264 useless extension candidates. Maximal degree in co-relation 166020. Up to 11072 conditions per place. [2023-01-28 05:34:19,040 INFO L137 encePairwiseOnDemand]: 250/257 looper letters, 725 selfloop transitions, 718 changer transitions 294/1737 dead transitions. [2023-01-28 05:34:19,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1737 transitions, 37302 flow [2023-01-28 05:34:19,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-01-28 05:34:19,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-01-28 05:34:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 6325 transitions. [2023-01-28 05:34:19,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32814526588845655 [2023-01-28 05:34:19,044 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 6325 transitions. [2023-01-28 05:34:19,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 6325 transitions. [2023-01-28 05:34:19,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:34:19,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 6325 transitions. [2023-01-28 05:34:19,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 84.33333333333333) internal successors, (6325), 75 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:34:19,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 257.0) internal successors, (19532), 76 states have internal predecessors, (19532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:34:19,057 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 257.0) internal successors, (19532), 76 states have internal predecessors, (19532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:34:19,057 INFO L175 Difference]: Start difference. First operand has 505 places, 1104 transitions, 25965 flow. Second operand 75 states and 6325 transitions. [2023-01-28 05:34:19,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1737 transitions, 37302 flow [2023-01-28 05:34:28,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 1737 transitions, 36612 flow, removed 305 selfloop flow, removed 30 redundant places. [2023-01-28 05:34:28,249 INFO L231 Difference]: Finished difference. Result has 546 places, 1244 transitions, 31584 flow [2023-01-28 05:34:28,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=257, PETRI_DIFFERENCE_MINUEND_FLOW=25564, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=574, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=31584, PETRI_PLACES=546, PETRI_TRANSITIONS=1244} [2023-01-28 05:34:28,250 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 526 predicate places. [2023-01-28 05:34:28,250 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 1244 transitions, 31584 flow [2023-01-28 05:34:28,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 78.76923076923077) internal successors, (3072), 39 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:34:28,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:34:28,251 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:34:28,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 05:34:28,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:34:28,452 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:34:28,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:34:28,452 INFO L85 PathProgramCache]: Analyzing trace with hash -609610603, now seen corresponding path program 23 times [2023-01-28 05:34:28,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:34:28,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009256287] [2023-01-28 05:34:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:34:28,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:34:28,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:34:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:34:30,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:34:30,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009256287] [2023-01-28 05:34:30,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009256287] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:34:30,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629695831] [2023-01-28 05:34:30,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:34:30,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:34:30,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:34:30,240 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:34:30,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 05:34:30,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 05:34:30,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:34:30,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 62 conjunts are in the unsatisfiable core [2023-01-28 05:34:30,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:34:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:34:31,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:34:32,325 INFO L321 Elim1Store]: treesize reduction 38, result has 79.0 percent of original size [2023-01-28 05:34:32,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 332 treesize of output 320 [2023-01-28 05:34:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:34:35,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629695831] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:34:35,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:34:35,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 50 [2023-01-28 05:34:35,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083299918] [2023-01-28 05:34:35,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:34:35,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-01-28 05:34:35,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:34:35,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-01-28 05:34:35,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2175, Unknown=0, NotChecked=0, Total=2652 [2023-01-28 05:34:35,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 257 [2023-01-28 05:34:35,648 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 1244 transitions, 31584 flow. Second operand has 52 states, 52 states have (on average 78.46153846153847) internal successors, (4080), 52 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:34:35,648 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:34:35,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 257 [2023-01-28 05:34:35,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 05:34:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 05:34:36,641 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 05:34:36,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 05:34:36,687 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:34:36,687 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:34:36,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:34:36,842 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantifier-free) to 65 known predicates. [2023-01-28 05:34:36,844 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 05:34:36,844 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 05:34:36,844 INFO L445 BasicCegarLoop]: Path program histogram: [23, 1, 1, 1] [2023-01-28 05:34:36,847 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 05:34:36,847 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 05:34:36,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 05:34:36 BasicIcfg [2023-01-28 05:34:36,849 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 05:34:36,849 INFO L158 Benchmark]: Toolchain (without parser) took 758495.07ms. Allocated memory was 346.0MB in the beginning and 14.4GB in the end (delta: 14.1GB). Free memory was 295.4MB in the beginning and 8.1GB in the end (delta: -7.8GB). Peak memory consumption was 6.2GB. Max. memory is 16.0GB. [2023-01-28 05:34:36,849 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 05:34:36,849 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.71ms. Allocated memory is still 346.0MB. Free memory was 295.1MB in the beginning and 283.9MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 05:34:36,850 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.73ms. Allocated memory is still 346.0MB. Free memory was 283.9MB in the beginning and 281.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 05:34:36,850 INFO L158 Benchmark]: Boogie Preprocessor took 22.05ms. Allocated memory is still 346.0MB. Free memory was 281.9MB in the beginning and 280.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 05:34:36,850 INFO L158 Benchmark]: RCFGBuilder took 540.90ms. Allocated memory is still 346.0MB. Free memory was 280.3MB in the beginning and 304.4MB in the end (delta: -24.1MB). Peak memory consumption was 10.4MB. Max. memory is 16.0GB. [2023-01-28 05:34:36,850 INFO L158 Benchmark]: TraceAbstraction took 757691.03ms. Allocated memory was 346.0MB in the beginning and 14.4GB in the end (delta: 14.1GB). Free memory was 303.5MB in the beginning and 8.1GB in the end (delta: -7.8GB). Peak memory consumption was 6.2GB. Max. memory is 16.0GB. [2023-01-28 05:34:36,851 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 182.71ms. Allocated memory is still 346.0MB. Free memory was 295.1MB in the beginning and 283.9MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.73ms. Allocated memory is still 346.0MB. Free memory was 283.9MB in the beginning and 281.9MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.05ms. Allocated memory is still 346.0MB. Free memory was 281.9MB in the beginning and 280.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 540.90ms. Allocated memory is still 346.0MB. Free memory was 280.3MB in the beginning and 304.4MB in the end (delta: -24.1MB). Peak memory consumption was 10.4MB. Max. memory is 16.0GB. * TraceAbstraction took 757691.03ms. Allocated memory was 346.0MB in the beginning and 14.4GB in the end (delta: 14.1GB). Free memory was 303.5MB in the beginning and 8.1GB in the end (delta: -7.8GB). Peak memory consumption was 6.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.4s, 113 PlacesBefore, 20 PlacesAfterwards, 117 TransitionsBefore, 16 TransitionsAfterwards, 792 CoEnabledTransitionPairs, 7 FixpointIterations, 68 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 13 ConcurrentYvCompositions, 8 ChoiceCompositions, 130 TotalNumberOfCompositions, 883 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 869, independent: 860, independent conditional: 0, independent unconditional: 860, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 456, independent: 451, independent conditional: 0, independent unconditional: 451, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 869, independent: 409, independent conditional: 0, independent unconditional: 409, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 456, unknown conditional: 0, unknown unconditional: 456] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, 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: 94]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 65 known predicates. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 65 known predicates. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 65 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 145 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: 757.5s, OverallIterations: 26, TraceHistogramMax: 6, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 607.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 94 mSolverCounterUnknown, 10695 SdHoareTripleChecker+Valid, 38.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10695 mSDsluCounter, 250 SdHoareTripleChecker+Invalid, 34.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 154 IncrementalHoareTripleChecker+Unchecked, 232 mSDsCounter, 1071 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 49747 IncrementalHoareTripleChecker+Invalid, 51066 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1071 mSolverCounterUnsat, 18 mSDtfsCounter, 49747 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2462 GetRequests, 534 SyntacticMatches, 18 SemanticMatches, 1909 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 101138 ImplicationChecksByTransitivity, 130.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90394occurred in iteration=23, InterpolantAutomatonStates: 1386, 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: 0.3s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 135.7s InterpolantComputationTime, 1108 NumberOfCodeBlocks, 1106 NumberOfCodeBlocksAsserted, 83 NumberOfCheckSat, 1569 ConstructedInterpolants, 15 QuantifiedInterpolants, 52027 SizeOfPredicates, 516 NumberOfNonLiveVariables, 5258 ConjunctsInSsa, 930 ConjunctsInUnsatCore, 72 InterpolantComputations, 3 PerfectInterpolantSequences, 321/1686 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