/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/bench-exp2x9.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 19:49:19,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 19:49:19,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 19:49:19,696 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 19:49:19,697 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 19:49:19,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 19:49:19,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 19:49:19,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 19:49:19,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 19:49:19,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 19:49:19,702 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 19:49:19,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 19:49:19,703 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 19:49:19,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 19:49:19,704 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 19:49:19,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 19:49:19,705 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 19:49:19,705 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 19:49:19,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 19:49:19,707 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 19:49:19,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 19:49:19,714 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 19:49:19,715 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 19:49:19,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 19:49:19,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 19:49:19,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 19:49:19,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 19:49:19,718 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 19:49:19,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 19:49:19,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 19:49:19,719 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 19:49:19,720 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 19:49:19,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 19:49:19,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 19:49:19,721 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 19:49:19,721 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 19:49:19,722 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 19:49:19,722 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 19:49:19,722 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 19:49:19,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 19:49:19,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 19:49:19,724 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 19:49:19,751 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 19:49:19,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 19:49:19,752 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 19:49:19,752 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 19:49:19,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 19:49:19,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 19:49:19,753 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 19:49:19,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 19:49:19,753 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 19:49:19,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 19:49:19,753 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 19:49:19,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 19:49:19,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 19:49:19,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 19:49:19,754 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 19:49:19,754 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 19:49:19,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 19:49:19,754 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 19:49:19,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 19:49:19,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 19:49:19,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 19:49:19,755 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 19:49:19,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 19:49:19,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:49:19,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 19:49:19,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 19:49:19,755 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 19:49:19,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 19:49:19,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 19:49:19,755 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 19:49:19,756 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 19:49:19,756 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 19:49:20,012 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 19:49:20,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 19:49:20,105 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 19:49:20,107 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 19:49:20,115 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 19:49:20,117 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/bench-exp2x9.wvr.c [2023-01-27 19:49:21,502 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 19:49:21,798 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 19:49:21,799 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/bench-exp2x9.wvr.c [2023-01-27 19:49:21,805 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/153870afd/ce4a7ae7107041e287004992533ac5d0/FLAG0cf691d31 [2023-01-27 19:49:21,817 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/153870afd/ce4a7ae7107041e287004992533ac5d0 [2023-01-27 19:49:21,820 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 19:49:21,821 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 19:49:21,823 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 19:49:21,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 19:49:21,825 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 19:49:21,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:49:21" (1/1) ... [2023-01-27 19:49:21,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@488698ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:21, skipping insertion in model container [2023-01-27 19:49:21,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 07:49:21" (1/1) ... [2023-01-27 19:49:21,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 19:49:21,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 19:49:21,979 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/bench-exp2x9.wvr.c[2669,2682] [2023-01-27 19:49:21,982 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:49:21,990 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 19:49:22,015 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/bench-exp2x9.wvr.c[2669,2682] [2023-01-27 19:49:22,016 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 19:49:22,037 INFO L208 MainTranslator]: Completed translation [2023-01-27 19:49:22,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22 WrapperNode [2023-01-27 19:49:22,037 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 19:49:22,038 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 19:49:22,038 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 19:49:22,038 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 19:49:22,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (1/1) ... [2023-01-27 19:49:22,048 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (1/1) ... [2023-01-27 19:49:22,062 INFO L138 Inliner]: procedures = 20, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-01-27 19:49:22,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 19:49:22,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 19:49:22,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 19:49:22,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 19:49:22,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (1/1) ... [2023-01-27 19:49:22,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (1/1) ... [2023-01-27 19:49:22,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (1/1) ... [2023-01-27 19:49:22,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (1/1) ... [2023-01-27 19:49:22,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (1/1) ... [2023-01-27 19:49:22,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (1/1) ... [2023-01-27 19:49:22,105 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (1/1) ... [2023-01-27 19:49:22,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (1/1) ... [2023-01-27 19:49:22,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 19:49:22,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 19:49:22,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 19:49:22,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 19:49:22,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (1/1) ... [2023-01-27 19:49:22,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 19:49:22,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:49:22,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-27 19:49:22,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-27 19:49:22,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 19:49:22,217 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-27 19:49:22,217 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-27 19:49:22,218 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-27 19:49:22,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-27 19:49:22,218 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-27 19:49:22,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-27 19:49:22,218 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-01-27 19:49:22,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-01-27 19:49:22,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 19:49:22,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 19:49:22,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 19:49:22,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 19:49:22,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 19:49:22,221 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 19:49:22,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 19:49:22,223 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 19:49:22,374 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 19:49:22,376 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 19:49:22,599 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 19:49:22,604 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 19:49:22,605 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-27 19:49:22,606 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:49:22 BoogieIcfgContainer [2023-01-27 19:49:22,606 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 19:49:22,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 19:49:22,608 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 19:49:22,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 19:49:22,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 07:49:21" (1/3) ... [2023-01-27 19:49:22,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eb38b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:49:22, skipping insertion in model container [2023-01-27 19:49:22,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 07:49:22" (2/3) ... [2023-01-27 19:49:22,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eb38b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 07:49:22, skipping insertion in model container [2023-01-27 19:49:22,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 07:49:22" (3/3) ... [2023-01-27 19:49:22,628 INFO L112 eAbstractionObserver]: Analyzing ICFG bench-exp2x9.wvr.c [2023-01-27 19:49:22,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 19:49:22,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 19:49:22,647 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 19:49:22,741 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 19:49:22,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 147 transitions, 326 flow [2023-01-27 19:49:22,853 INFO L130 PetriNetUnfolder]: 10/143 cut-off events. [2023-01-27 19:49:22,854 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 19:49:22,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 143 events. 10/143 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 131 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-01-27 19:49:22,860 INFO L82 GeneralOperation]: Start removeDead. Operand has 150 places, 147 transitions, 326 flow [2023-01-27 19:49:22,867 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 131 transitions, 286 flow [2023-01-27 19:49:22,870 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 19:49:22,886 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 131 transitions, 286 flow [2023-01-27 19:49:22,888 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 131 transitions, 286 flow [2023-01-27 19:49:22,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 131 transitions, 286 flow [2023-01-27 19:49:22,923 INFO L130 PetriNetUnfolder]: 10/131 cut-off events. [2023-01-27 19:49:22,923 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 19:49:22,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 131 events. 10/131 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 131 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2023-01-27 19:49:22,925 INFO L119 LiptonReduction]: Number of co-enabled transitions 3312 [2023-01-27 19:49:28,107 INFO L134 LiptonReduction]: Checked pairs total: 2977 [2023-01-27 19:49:28,108 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-01-27 19:49:28,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 19:49:28,143 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;@77a1a591, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 19:49:28,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-01-27 19:49:28,163 INFO L130 PetriNetUnfolder]: 4/24 cut-off events. [2023-01-27 19:49:28,163 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 19:49:28,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:49:28,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:49:28,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:49:28,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:49:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1108684386, now seen corresponding path program 1 times [2023-01-27 19:49:28,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:49:28,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343224489] [2023-01-27 19:49:28,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:49:28,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:49:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:49:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:29,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:49:29,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343224489] [2023-01-27 19:49:29,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343224489] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:49:29,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:49:29,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-27 19:49:29,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203177395] [2023-01-27 19:49:29,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:49:29,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 19:49:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:49:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 19:49:29,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 19:49:29,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 266 [2023-01-27 19:49:29,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:29,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:49:29,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 266 [2023-01-27 19:49:29,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:49:30,130 INFO L130 PetriNetUnfolder]: 497/677 cut-off events. [2023-01-27 19:49:30,131 INFO L131 PetriNetUnfolder]: For 44/44 co-relation queries the response was YES. [2023-01-27 19:49:30,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448 conditions, 677 events. 497/677 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1767 event pairs, 117 based on Foata normal form. 1/414 useless extension candidates. Maximal degree in co-relation 1016. Up to 471 conditions per place. [2023-01-27 19:49:30,136 INFO L137 encePairwiseOnDemand]: 260/266 looper letters, 41 selfloop transitions, 5 changer transitions 1/47 dead transitions. [2023-01-27 19:49:30,136 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 47 transitions, 233 flow [2023-01-27 19:49:30,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 19:49:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 19:49:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 306 transitions. [2023-01-27 19:49:30,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38345864661654133 [2023-01-27 19:49:30,185 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 306 transitions. [2023-01-27 19:49:30,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 306 transitions. [2023-01-27 19:49:30,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:49:30,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 306 transitions. [2023-01-27 19:49:30,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:30,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:30,222 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:30,224 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 74 flow. Second operand 3 states and 306 transitions. [2023-01-27 19:49:30,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 47 transitions, 233 flow [2023-01-27 19:49:30,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 47 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-27 19:49:30,231 INFO L231 Difference]: Finished difference. Result has 29 places, 29 transitions, 91 flow [2023-01-27 19:49:30,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=29, PETRI_TRANSITIONS=29} [2023-01-27 19:49:30,237 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -5 predicate places. [2023-01-27 19:49:30,237 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 29 transitions, 91 flow [2023-01-27 19:49:30,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:30,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:49:30,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:49:30,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 19:49:30,249 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:49:30,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:49:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2012653977, now seen corresponding path program 1 times [2023-01-27 19:49:30,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:49:30,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298054050] [2023-01-27 19:49:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:49:30,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:49:30,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:49:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:30,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:49:30,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298054050] [2023-01-27 19:49:30,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298054050] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:49:30,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:49:30,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 19:49:30,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764063308] [2023-01-27 19:49:30,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:49:30,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 19:49:30,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:49:30,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 19:49:30,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 19:49:30,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 266 [2023-01-27 19:49:30,636 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 29 transitions, 91 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:30,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:49:30,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 266 [2023-01-27 19:49:30,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:49:30,995 INFO L130 PetriNetUnfolder]: 461/641 cut-off events. [2023-01-27 19:49:30,995 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2023-01-27 19:49:30,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1641 conditions, 641 events. 461/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1829 event pairs, 17 based on Foata normal form. 36/677 useless extension candidates. Maximal degree in co-relation 586. Up to 435 conditions per place. [2023-01-27 19:49:30,999 INFO L137 encePairwiseOnDemand]: 259/266 looper letters, 50 selfloop transitions, 9 changer transitions 1/60 dead transitions. [2023-01-27 19:49:30,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 60 transitions, 289 flow [2023-01-27 19:49:31,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 19:49:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 19:49:31,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 398 transitions. [2023-01-27 19:49:31,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37406015037593987 [2023-01-27 19:49:31,006 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 398 transitions. [2023-01-27 19:49:31,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 398 transitions. [2023-01-27 19:49:31,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:49:31,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 398 transitions. [2023-01-27 19:49:31,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:31,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:31,009 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:31,010 INFO L175 Difference]: Start difference. First operand has 29 places, 29 transitions, 91 flow. Second operand 4 states and 398 transitions. [2023-01-27 19:49:31,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 60 transitions, 289 flow [2023-01-27 19:49:31,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 60 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:49:31,011 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 127 flow [2023-01-27 19:49:31,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-01-27 19:49:31,012 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -2 predicate places. [2023-01-27 19:49:31,012 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 127 flow [2023-01-27 19:49:31,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:31,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:49:31,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:49:31,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 19:49:31,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:49:31,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:49:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1503050801, now seen corresponding path program 1 times [2023-01-27 19:49:31,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:49:31,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932730976] [2023-01-27 19:49:31,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:49:31,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:49:31,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:49:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:31,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:49:31,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932730976] [2023-01-27 19:49:31,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932730976] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:49:31,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:49:31,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 19:49:31,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121521207] [2023-01-27 19:49:31,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:49:31,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 19:49:31,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:49:31,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 19:49:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-27 19:49:31,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 266 [2023-01-27 19:49:31,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 127 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:31,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:49:31,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 266 [2023-01-27 19:49:31,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:49:32,175 INFO L130 PetriNetUnfolder]: 431/611 cut-off events. [2023-01-27 19:49:32,175 INFO L131 PetriNetUnfolder]: For 479/479 co-relation queries the response was YES. [2023-01-27 19:49:32,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1721 conditions, 611 events. 431/611 cut-off events. For 479/479 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1733 event pairs, 47 based on Foata normal form. 30/641 useless extension candidates. Maximal degree in co-relation 523. Up to 405 conditions per place. [2023-01-27 19:49:32,178 INFO L137 encePairwiseOnDemand]: 259/266 looper letters, 44 selfloop transitions, 11 changer transitions 11/66 dead transitions. [2023-01-27 19:49:32,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 66 transitions, 359 flow [2023-01-27 19:49:32,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 19:49:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 19:49:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 398 transitions. [2023-01-27 19:49:32,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37406015037593987 [2023-01-27 19:49:32,180 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 398 transitions. [2023-01-27 19:49:32,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 398 transitions. [2023-01-27 19:49:32,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:49:32,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 398 transitions. [2023-01-27 19:49:32,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:32,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:32,185 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:32,185 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 127 flow. Second operand 4 states and 398 transitions. [2023-01-27 19:49:32,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 66 transitions, 359 flow [2023-01-27 19:49:32,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 66 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 19:49:32,187 INFO L231 Difference]: Finished difference. Result has 34 places, 37 transitions, 162 flow [2023-01-27 19:49:32,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=34, PETRI_TRANSITIONS=37} [2023-01-27 19:49:32,188 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2023-01-27 19:49:32,188 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 37 transitions, 162 flow [2023-01-27 19:49:32,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:32,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:49:32,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:49:32,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 19:49:32,189 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:49:32,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:49:32,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1990142436, now seen corresponding path program 1 times [2023-01-27 19:49:32,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:49:32,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488730599] [2023-01-27 19:49:32,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:49:32,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:49:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:49:32,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:32,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:49:32,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488730599] [2023-01-27 19:49:32,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488730599] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:49:32,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454993515] [2023-01-27 19:49:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:49:32,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:49:32,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:49:32,420 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:49:32,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-27 19:49:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:49:32,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-27 19:49:32,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:49:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:33,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:49:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454993515] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:49:33,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:49:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:49:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949233117] [2023-01-27 19:49:33,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:49:33,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:49:33,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:49:33,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:49:33,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:49:33,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 266 [2023-01-27 19:49:33,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 37 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 92.0) internal successors, (644), 7 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:33,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:49:33,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 266 [2023-01-27 19:49:33,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:49:33,765 INFO L130 PetriNetUnfolder]: 809/1129 cut-off events. [2023-01-27 19:49:33,769 INFO L131 PetriNetUnfolder]: For 711/711 co-relation queries the response was YES. [2023-01-27 19:49:33,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3396 conditions, 1129 events. 809/1129 cut-off events. For 711/711 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3544 event pairs, 185 based on Foata normal form. 30/1159 useless extension candidates. Maximal degree in co-relation 819. Up to 422 conditions per place. [2023-01-27 19:49:33,775 INFO L137 encePairwiseOnDemand]: 259/266 looper letters, 85 selfloop transitions, 14 changer transitions 3/102 dead transitions. [2023-01-27 19:49:33,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 102 transitions, 567 flow [2023-01-27 19:49:33,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:49:33,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:49:33,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 600 transitions. [2023-01-27 19:49:33,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37593984962406013 [2023-01-27 19:49:33,777 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 600 transitions. [2023-01-27 19:49:33,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 600 transitions. [2023-01-27 19:49:33,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:49:33,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 600 transitions. [2023-01-27 19:49:33,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 100.0) internal successors, (600), 6 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:33,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 266.0) internal successors, (1862), 7 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:33,782 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 266.0) internal successors, (1862), 7 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:33,782 INFO L175 Difference]: Start difference. First operand has 34 places, 37 transitions, 162 flow. Second operand 6 states and 600 transitions. [2023-01-27 19:49:33,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 102 transitions, 567 flow [2023-01-27 19:49:33,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 102 transitions, 558 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-27 19:49:33,785 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 224 flow [2023-01-27 19:49:33,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=224, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2023-01-27 19:49:33,785 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2023-01-27 19:49:33,785 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 224 flow [2023-01-27 19:49:33,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 92.0) internal successors, (644), 7 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:33,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:49:33,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:49:33,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-27 19:49:33,992 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 [2023-01-27 19:49:33,992 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:49:33,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:49:33,996 INFO L85 PathProgramCache]: Analyzing trace with hash -357686183, now seen corresponding path program 2 times [2023-01-27 19:49:33,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:49:33,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931314600] [2023-01-27 19:49:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:49:33,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:49:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:49:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:34,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:49:34,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931314600] [2023-01-27 19:49:34,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931314600] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:49:34,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:49:34,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 19:49:34,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730758856] [2023-01-27 19:49:34,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:49:34,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 19:49:34,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:49:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 19:49:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 19:49:34,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 266 [2023-01-27 19:49:34,242 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:34,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:49:34,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 266 [2023-01-27 19:49:34,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:49:34,823 INFO L130 PetriNetUnfolder]: 897/1245 cut-off events. [2023-01-27 19:49:34,823 INFO L131 PetriNetUnfolder]: For 2058/2058 co-relation queries the response was YES. [2023-01-27 19:49:34,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4386 conditions, 1245 events. 897/1245 cut-off events. For 2058/2058 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3946 event pairs, 305 based on Foata normal form. 28/1273 useless extension candidates. Maximal degree in co-relation 2498. Up to 937 conditions per place. [2023-01-27 19:49:34,885 INFO L137 encePairwiseOnDemand]: 260/266 looper letters, 59 selfloop transitions, 10 changer transitions 3/72 dead transitions. [2023-01-27 19:49:34,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 72 transitions, 473 flow [2023-01-27 19:49:34,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 19:49:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 19:49:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 396 transitions. [2023-01-27 19:49:34,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37218045112781956 [2023-01-27 19:49:34,898 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 396 transitions. [2023-01-27 19:49:34,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 396 transitions. [2023-01-27 19:49:34,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:49:34,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 396 transitions. [2023-01-27 19:49:34,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:34,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:34,905 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:34,906 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 224 flow. Second operand 4 states and 396 transitions. [2023-01-27 19:49:34,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 72 transitions, 473 flow [2023-01-27 19:49:34,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 72 transitions, 462 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:49:34,911 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 246 flow [2023-01-27 19:49:34,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=246, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-01-27 19:49:34,912 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 10 predicate places. [2023-01-27 19:49:34,912 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 246 flow [2023-01-27 19:49:34,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:34,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:49:34,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:49:34,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 19:49:34,913 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:49:34,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:49:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash -588249057, now seen corresponding path program 2 times [2023-01-27 19:49:34,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:49:34,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736004581] [2023-01-27 19:49:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:49:34,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:49:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:49:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:35,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:49:35,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736004581] [2023-01-27 19:49:35,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736004581] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:49:35,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292064617] [2023-01-27 19:49:35,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:49:35,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:49:35,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:49:35,155 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:49:35,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-27 19:49:35,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-27 19:49:35,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-27 19:49:35,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-27 19:49:35,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:49:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:35,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:49:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:35,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292064617] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:49:35,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:49:35,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-01-27 19:49:35,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353744805] [2023-01-27 19:49:35,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:49:35,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-27 19:49:35,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:49:35,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-27 19:49:35,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-27 19:49:35,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 266 [2023-01-27 19:49:35,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 43 transitions, 246 flow. Second operand has 7 states, 7 states have (on average 90.28571428571429) internal successors, (632), 7 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:35,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:49:35,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 266 [2023-01-27 19:49:35,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:49:36,233 INFO L130 PetriNetUnfolder]: 1793/2461 cut-off events. [2023-01-27 19:49:36,233 INFO L131 PetriNetUnfolder]: For 4620/4620 co-relation queries the response was YES. [2023-01-27 19:49:36,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9082 conditions, 2461 events. 1793/2461 cut-off events. For 4620/4620 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9149 event pairs, 325 based on Foata normal form. 104/2565 useless extension candidates. Maximal degree in co-relation 4890. Up to 1139 conditions per place. [2023-01-27 19:49:36,258 INFO L137 encePairwiseOnDemand]: 259/266 looper letters, 111 selfloop transitions, 14 changer transitions 3/128 dead transitions. [2023-01-27 19:49:36,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 128 transitions, 880 flow [2023-01-27 19:49:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 19:49:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 19:49:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 604 transitions. [2023-01-27 19:49:36,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37844611528822053 [2023-01-27 19:49:36,263 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 604 transitions. [2023-01-27 19:49:36,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 604 transitions. [2023-01-27 19:49:36,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:49:36,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 604 transitions. [2023-01-27 19:49:36,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 100.66666666666667) internal successors, (604), 6 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:36,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 266.0) internal successors, (1862), 7 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:36,266 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 266.0) internal successors, (1862), 7 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:36,266 INFO L175 Difference]: Start difference. First operand has 44 places, 43 transitions, 246 flow. Second operand 6 states and 604 transitions. [2023-01-27 19:49:36,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 128 transitions, 880 flow [2023-01-27 19:49:36,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 128 transitions, 844 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-27 19:49:36,274 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 296 flow [2023-01-27 19:49:36,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-01-27 19:49:36,276 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 16 predicate places. [2023-01-27 19:49:36,276 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 296 flow [2023-01-27 19:49:36,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 90.28571428571429) internal successors, (632), 7 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:36,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:49:36,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:49:36,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-27 19:49:36,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-27 19:49:36,485 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:49:36,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:49:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1066091176, now seen corresponding path program 1 times [2023-01-27 19:49:36,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:49:36,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857441846] [2023-01-27 19:49:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:49:36,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:49:36,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:49:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:36,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:49:36,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857441846] [2023-01-27 19:49:36,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857441846] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 19:49:36,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 19:49:36,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 19:49:36,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397837508] [2023-01-27 19:49:36,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 19:49:36,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 19:49:36,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:49:36,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 19:49:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 19:49:36,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 266 [2023-01-27 19:49:36,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:36,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:49:36,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 266 [2023-01-27 19:49:36,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:49:37,085 INFO L130 PetriNetUnfolder]: 2009/2745 cut-off events. [2023-01-27 19:49:37,085 INFO L131 PetriNetUnfolder]: For 7050/7050 co-relation queries the response was YES. [2023-01-27 19:49:37,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11277 conditions, 2745 events. 2009/2745 cut-off events. For 7050/7050 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10242 event pairs, 539 based on Foata normal form. 68/2813 useless extension candidates. Maximal degree in co-relation 6065. Up to 2309 conditions per place. [2023-01-27 19:49:37,109 INFO L137 encePairwiseOnDemand]: 260/266 looper letters, 70 selfloop transitions, 10 changer transitions 3/83 dead transitions. [2023-01-27 19:49:37,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 83 transitions, 624 flow [2023-01-27 19:49:37,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 19:49:37,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 19:49:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 396 transitions. [2023-01-27 19:49:37,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37218045112781956 [2023-01-27 19:49:37,110 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 396 transitions. [2023-01-27 19:49:37,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 396 transitions. [2023-01-27 19:49:37,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:49:37,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 396 transitions. [2023-01-27 19:49:37,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 99.0) internal successors, (396), 4 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:37,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:37,113 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 266.0) internal successors, (1330), 5 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:37,113 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 296 flow. Second operand 4 states and 396 transitions. [2023-01-27 19:49:37,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 83 transitions, 624 flow [2023-01-27 19:49:37,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 83 transitions, 613 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-27 19:49:37,122 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 318 flow [2023-01-27 19:49:37,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=318, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-01-27 19:49:37,122 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2023-01-27 19:49:37,122 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 318 flow [2023-01-27 19:49:37,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:37,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:49:37,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:49:37,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 19:49:37,123 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:49:37,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:49:37,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1050195087, now seen corresponding path program 1 times [2023-01-27 19:49:37,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:49:37,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299752168] [2023-01-27 19:49:37,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:49:37,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:49:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:49:38,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:38,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:49:38,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299752168] [2023-01-27 19:49:38,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299752168] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:49:38,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948702224] [2023-01-27 19:49:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:49:38,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:49:38,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:49:38,133 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:49:38,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-27 19:49:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:49:38,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-27 19:49:38,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:49:44,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:44,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:49:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:49:49,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948702224] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:49:49,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:49:49,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 10 [2023-01-27 19:49:49,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661217809] [2023-01-27 19:49:49,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:49:49,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 19:49:49,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:49:49,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 19:49:49,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=98, Unknown=4, NotChecked=0, Total=132 [2023-01-27 19:49:49,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 266 [2023-01-27 19:49:49,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 318 flow. Second operand has 12 states, 12 states have (on average 88.91666666666667) internal successors, (1067), 12 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:49:49,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:49:49,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 266 [2023-01-27 19:49:49,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:49:56,721 WARN L222 SmtUtils]: Spent 6.63s on a formula simplification. DAG size of input: 59 DAG size of output: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 19:49:58,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:49:59,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:06,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:08,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:16,516 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:18,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:24,686 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:26,868 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:28,996 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:31,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:33,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:36,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:38,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:42,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:46,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:52,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:54,981 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:57,245 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 19:50:59,601 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:51:01,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 19:51:02,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 19:51:05,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-27 19:51:07,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:51:09,660 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:51:09,796 INFO L130 PetriNetUnfolder]: 2985/4074 cut-off events. [2023-01-27 19:51:09,796 INFO L131 PetriNetUnfolder]: For 11320/11320 co-relation queries the response was YES. [2023-01-27 19:51:09,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17370 conditions, 4074 events. 2985/4074 cut-off events. For 11320/11320 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16542 event pairs, 453 based on Foata normal form. 3/4077 useless extension candidates. Maximal degree in co-relation 9836. Up to 2933 conditions per place. [2023-01-27 19:51:09,838 INFO L137 encePairwiseOnDemand]: 259/266 looper letters, 136 selfloop transitions, 32 changer transitions 6/174 dead transitions. [2023-01-27 19:51:09,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 174 transitions, 1214 flow [2023-01-27 19:51:09,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-27 19:51:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-27 19:51:09,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 913 transitions. [2023-01-27 19:51:09,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3813700918964077 [2023-01-27 19:51:09,841 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 913 transitions. [2023-01-27 19:51:09,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 913 transitions. [2023-01-27 19:51:09,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:51:09,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 913 transitions. [2023-01-27 19:51:09,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 101.44444444444444) internal successors, (913), 9 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:51:09,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 266.0) internal successors, (2660), 10 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:51:09,847 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 266.0) internal successors, (2660), 10 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:51:09,847 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 318 flow. Second operand 9 states and 913 transitions. [2023-01-27 19:51:09,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 174 transitions, 1214 flow [2023-01-27 19:51:09,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 174 transitions, 1193 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-27 19:51:09,859 INFO L231 Difference]: Finished difference. Result has 64 places, 72 transitions, 572 flow [2023-01-27 19:51:09,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=572, PETRI_PLACES=64, PETRI_TRANSITIONS=72} [2023-01-27 19:51:09,862 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 30 predicate places. [2023-01-27 19:51:09,862 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 72 transitions, 572 flow [2023-01-27 19:51:09,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.91666666666667) internal successors, (1067), 12 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:51:09,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:51:09,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:51:09,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-27 19:51:10,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:51:10,068 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:51:10,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:51:10,068 INFO L85 PathProgramCache]: Analyzing trace with hash -997153331, now seen corresponding path program 1 times [2023-01-27 19:51:10,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:51:10,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281708165] [2023-01-27 19:51:10,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:51:10,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:51:10,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:51:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:51:10,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:51:10,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281708165] [2023-01-27 19:51:10,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281708165] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:51:10,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896285008] [2023-01-27 19:51:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:51:10,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:51:10,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:51:10,570 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:51:10,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-27 19:52:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:52:54,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-27 19:52:54,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-27 19:52:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:52:59,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-27 19:53:03,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:53:03,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896285008] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-27 19:53:03,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-27 19:53:03,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 10 [2023-01-27 19:53:03,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830357068] [2023-01-27 19:53:03,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-27 19:53:03,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-27 19:53:03,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 19:53:03,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-27 19:53:03,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=94, Unknown=3, NotChecked=0, Total=132 [2023-01-27 19:53:03,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 266 [2023-01-27 19:53:03,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 72 transitions, 572 flow. Second operand has 12 states, 12 states have (on average 89.41666666666667) internal successors, (1073), 12 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:53:03,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 19:53:03,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 266 [2023-01-27 19:53:03,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 19:53:11,305 WARN L222 SmtUtils]: Spent 6.96s on a formula simplification. DAG size of input: 64 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-27 19:53:13,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:16,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:18,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:20,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:23,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:25,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:27,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:34,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:37,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:41,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:44,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:47,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-27 19:53:47,406 INFO L130 PetriNetUnfolder]: 3663/4982 cut-off events. [2023-01-27 19:53:47,407 INFO L131 PetriNetUnfolder]: For 16903/16903 co-relation queries the response was YES. [2023-01-27 19:53:47,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22651 conditions, 4982 events. 3663/4982 cut-off events. For 16903/16903 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20524 event pairs, 865 based on Foata normal form. 2/4984 useless extension candidates. Maximal degree in co-relation 20734. Up to 4112 conditions per place. [2023-01-27 19:53:47,426 INFO L137 encePairwiseOnDemand]: 260/266 looper letters, 125 selfloop transitions, 26 changer transitions 5/156 dead transitions. [2023-01-27 19:53:47,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 156 transitions, 1285 flow [2023-01-27 19:53:47,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 19:53:47,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 19:53:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 702 transitions. [2023-01-27 19:53:47,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3770139634801289 [2023-01-27 19:53:47,453 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 702 transitions. [2023-01-27 19:53:47,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 702 transitions. [2023-01-27 19:53:47,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 19:53:47,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 702 transitions. [2023-01-27 19:53:47,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 100.28571428571429) internal successors, (702), 7 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:53:47,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 266.0) internal successors, (2128), 8 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:53:47,469 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 266.0) internal successors, (2128), 8 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:53:47,470 INFO L175 Difference]: Start difference. First operand has 64 places, 72 transitions, 572 flow. Second operand 7 states and 702 transitions. [2023-01-27 19:53:47,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 156 transitions, 1285 flow [2023-01-27 19:53:47,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 156 transitions, 1220 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-01-27 19:53:47,496 INFO L231 Difference]: Finished difference. Result has 72 places, 89 transitions, 717 flow [2023-01-27 19:53:47,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=717, PETRI_PLACES=72, PETRI_TRANSITIONS=89} [2023-01-27 19:53:47,513 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 38 predicate places. [2023-01-27 19:53:47,513 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 89 transitions, 717 flow [2023-01-27 19:53:47,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 89.41666666666667) internal successors, (1073), 12 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 19:53:47,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 19:53:47,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 19:53:47,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-27 19:53:47,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:53:47,737 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-01-27 19:53:47,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 19:53:47,737 INFO L85 PathProgramCache]: Analyzing trace with hash 817389477, now seen corresponding path program 2 times [2023-01-27 19:53:47,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 19:53:47,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137891702] [2023-01-27 19:53:47,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 19:53:47,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 19:53:47,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 19:53:49,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 19:53:49,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 19:53:49,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137891702] [2023-01-27 19:53:49,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137891702] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-27 19:53:49,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275184557] [2023-01-27 19:53:49,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-27 19:53:49,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-27 19:53:49,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 19:53:49,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-27 19:53:49,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process