/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/clever.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 09:26:05,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 09:26:05,757 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 09:26:05,775 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 09:26:05,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 09:26:05,776 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 09:26:05,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 09:26:05,777 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 09:26:05,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 09:26:05,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 09:26:05,779 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 09:26:05,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 09:26:05,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 09:26:05,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 09:26:05,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 09:26:05,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 09:26:05,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 09:26:05,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 09:26:05,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 09:26:05,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 09:26:05,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 09:26:05,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 09:26:05,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 09:26:05,787 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 09:26:05,789 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 09:26:05,789 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 09:26:05,789 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 09:26:05,790 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 09:26:05,790 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 09:26:05,791 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 09:26:05,791 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 09:26:05,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 09:26:05,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 09:26:05,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 09:26:05,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 09:26:05,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 09:26:05,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 09:26:05,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 09:26:05,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 09:26:05,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 09:26:05,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 09:26:05,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 09:26:05,808 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 09:26:05,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 09:26:05,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 09:26:05,809 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 09:26:05,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 09:26:05,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 09:26:05,809 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 09:26:05,809 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 09:26:05,809 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 09:26:05,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 09:26:05,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 09:26:05,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 09:26:05,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 09:26:05,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 09:26:05,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 09:26:05,810 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 09:26:05,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 09:26:05,810 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 09:26:05,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 09:26:05,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 09:26:05,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 09:26:05,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 09:26:05,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 09:26:05,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:26:05,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 09:26:05,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 09:26:05,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 09:26:05,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 09:26:05,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 09:26:05,812 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 09:26:05,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 09:26:05,812 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 09:26:05,977 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 09:26:05,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 09:26:05,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 09:26:05,998 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 09:26:05,999 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 09:26:06,000 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2023-01-28 09:26:07,008 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 09:26:07,131 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 09:26:07,131 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2023-01-28 09:26:07,135 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/584800a01/cb45a22784e64b9a8c4690efc295f59c/FLAG0675cfc6a [2023-01-28 09:26:07,144 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/584800a01/cb45a22784e64b9a8c4690efc295f59c [2023-01-28 09:26:07,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 09:26:07,146 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 09:26:07,147 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 09:26:07,147 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 09:26:07,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 09:26:07,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39fc4459 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07, skipping insertion in model container [2023-01-28 09:26:07,150 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,155 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 09:26:07,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 09:26:07,270 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/clever.wvr.c[2133,2146] [2023-01-28 09:26:07,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:26:07,282 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 09:26:07,309 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/clever.wvr.c[2133,2146] [2023-01-28 09:26:07,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:26:07,321 INFO L208 MainTranslator]: Completed translation [2023-01-28 09:26:07,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07 WrapperNode [2023-01-28 09:26:07,323 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 09:26:07,324 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 09:26:07,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 09:26:07,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 09:26:07,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,354 INFO L138 Inliner]: procedures = 19, calls = 21, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 85 [2023-01-28 09:26:07,354 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 09:26:07,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 09:26:07,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 09:26:07,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 09:26:07,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,382 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 09:26:07,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 09:26:07,388 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 09:26:07,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 09:26:07,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (1/1) ... [2023-01-28 09:26:07,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:26:07,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:07,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 09:26:07,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 09:26:07,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 09:26:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 09:26:07,448 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 09:26:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 09:26:07,448 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 09:26:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 09:26:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 09:26:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 09:26:07,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 09:26:07,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 09:26:07,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 09:26:07,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 09:26:07,450 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 09:26:07,513 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 09:26:07,515 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 09:26:07,647 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 09:26:07,653 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 09:26:07,653 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 09:26:07,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:26:07 BoogieIcfgContainer [2023-01-28 09:26:07,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 09:26:07,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 09:26:07,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 09:26:07,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 09:26:07,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 09:26:07" (1/3) ... [2023-01-28 09:26:07,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7adb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:26:07, skipping insertion in model container [2023-01-28 09:26:07,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:26:07" (2/3) ... [2023-01-28 09:26:07,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a7adb54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:26:07, skipping insertion in model container [2023-01-28 09:26:07,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:26:07" (3/3) ... [2023-01-28 09:26:07,660 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-01-28 09:26:07,672 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 09:26:07,672 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 09:26:07,672 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 09:26:07,736 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 09:26:07,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 117 places, 119 transitions, 254 flow [2023-01-28 09:26:07,807 INFO L130 PetriNetUnfolder]: 9/117 cut-off events. [2023-01-28 09:26:07,807 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 09:26:07,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-01-28 09:26:07,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 117 places, 119 transitions, 254 flow [2023-01-28 09:26:07,814 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 109 transitions, 230 flow [2023-01-28 09:26:07,816 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 09:26:07,822 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 109 transitions, 230 flow [2023-01-28 09:26:07,823 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 109 transitions, 230 flow [2023-01-28 09:26:07,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 109 transitions, 230 flow [2023-01-28 09:26:07,844 INFO L130 PetriNetUnfolder]: 9/109 cut-off events. [2023-01-28 09:26:07,844 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 09:26:07,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 109 events. 9/109 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 85. Up to 2 conditions per place. [2023-01-28 09:26:07,846 INFO L119 LiptonReduction]: Number of co-enabled transitions 756 [2023-01-28 09:26:10,441 INFO L134 LiptonReduction]: Checked pairs total: 744 [2023-01-28 09:26:10,441 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-01-28 09:26:10,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 09:26:10,462 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;@4d8356dc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 09:26:10,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 09:26:10,469 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-28 09:26:10,469 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 09:26:10,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:10,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:10,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:10,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:10,474 INFO L85 PathProgramCache]: Analyzing trace with hash -259219510, now seen corresponding path program 1 times [2023-01-28 09:26:10,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:10,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92196097] [2023-01-28 09:26:10,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:10,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:10,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:10,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92196097] [2023-01-28 09:26:10,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92196097] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:26:10,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:26:10,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 09:26:10,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995321999] [2023-01-28 09:26:10,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:26:10,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 09:26:10,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:10,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 09:26:10,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 09:26:10,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 224 [2023-01-28 09:26:10,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:10,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:10,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 224 [2023-01-28 09:26:10,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:10,999 INFO L130 PetriNetUnfolder]: 69/117 cut-off events. [2023-01-28 09:26:10,999 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 09:26:11,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 117 events. 69/117 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 280 event pairs, 15 based on Foata normal form. 1/78 useless extension candidates. Maximal degree in co-relation 204. Up to 73 conditions per place. [2023-01-28 09:26:11,003 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 23 selfloop transitions, 3 changer transitions 1/27 dead transitions. [2023-01-28 09:26:11,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 27 transitions, 129 flow [2023-01-28 09:26:11,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 09:26:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 09:26:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2023-01-28 09:26:11,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4836309523809524 [2023-01-28 09:26:11,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2023-01-28 09:26:11,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2023-01-28 09:26:11,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:11,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2023-01-28 09:26:11,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,035 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 325 transitions. [2023-01-28 09:26:11,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 27 transitions, 129 flow [2023-01-28 09:26:11,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 27 transitions, 115 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 09:26:11,038 INFO L231 Difference]: Finished difference. Result has 18 places, 17 transitions, 53 flow [2023-01-28 09:26:11,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=53, PETRI_PLACES=18, PETRI_TRANSITIONS=17} [2023-01-28 09:26:11,041 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-01-28 09:26:11,042 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 17 transitions, 53 flow [2023-01-28 09:26:11,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:11,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:11,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 09:26:11,042 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:11,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:11,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1272176076, now seen corresponding path program 1 times [2023-01-28 09:26:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:11,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973192938] [2023-01-28 09:26:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:11,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:11,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:11,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973192938] [2023-01-28 09:26:11,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973192938] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:26:11,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:26:11,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 09:26:11,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949998782] [2023-01-28 09:26:11,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:26:11,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 09:26:11,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:11,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 09:26:11,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 09:26:11,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:26:11,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 17 transitions, 53 flow. Second operand has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:11,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:26:11,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:11,163 INFO L130 PetriNetUnfolder]: 121/217 cut-off events. [2023-01-28 09:26:11,163 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2023-01-28 09:26:11,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528 conditions, 217 events. 121/217 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 688 event pairs, 18 based on Foata normal form. 4/201 useless extension candidates. Maximal degree in co-relation 201. Up to 130 conditions per place. [2023-01-28 09:26:11,164 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 35 selfloop transitions, 6 changer transitions 8/49 dead transitions. [2023-01-28 09:26:11,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 49 transitions, 243 flow [2023-01-28 09:26:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:26:11,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:26:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 510 transitions. [2023-01-28 09:26:11,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2023-01-28 09:26:11,166 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 510 transitions. [2023-01-28 09:26:11,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 510 transitions. [2023-01-28 09:26:11,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:11,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 510 transitions. [2023-01-28 09:26:11,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,170 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,170 INFO L175 Difference]: Start difference. First operand has 18 places, 17 transitions, 53 flow. Second operand 5 states and 510 transitions. [2023-01-28 09:26:11,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 49 transitions, 243 flow [2023-01-28 09:26:11,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 49 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 09:26:11,171 INFO L231 Difference]: Finished difference. Result has 23 places, 22 transitions, 99 flow [2023-01-28 09:26:11,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2023-01-28 09:26:11,171 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 4 predicate places. [2023-01-28 09:26:11,171 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 99 flow [2023-01-28 09:26:11,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:11,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:11,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 09:26:11,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:11,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1400720826, now seen corresponding path program 2 times [2023-01-28 09:26:11,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:11,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339793751] [2023-01-28 09:26:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:11,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:11,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:11,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:11,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339793751] [2023-01-28 09:26:11,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339793751] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:26:11,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:26:11,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 09:26:11,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516306973] [2023-01-28 09:26:11,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:26:11,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 09:26:11,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:11,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 09:26:11,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 09:26:11,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:26:11,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 99 flow. Second operand has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:11,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:26:11,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:11,268 INFO L130 PetriNetUnfolder]: 110/185 cut-off events. [2023-01-28 09:26:11,268 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2023-01-28 09:26:11,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585 conditions, 185 events. 110/185 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 513 event pairs, 14 based on Foata normal form. 8/193 useless extension candidates. Maximal degree in co-relation 190. Up to 128 conditions per place. [2023-01-28 09:26:11,269 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 29 selfloop transitions, 7 changer transitions 5/41 dead transitions. [2023-01-28 09:26:11,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 41 transitions, 247 flow [2023-01-28 09:26:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:26:11,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:26:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 504 transitions. [2023-01-28 09:26:11,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-01-28 09:26:11,271 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 504 transitions. [2023-01-28 09:26:11,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 504 transitions. [2023-01-28 09:26:11,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:11,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 504 transitions. [2023-01-28 09:26:11,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.8) internal successors, (504), 5 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,274 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,274 INFO L175 Difference]: Start difference. First operand has 23 places, 22 transitions, 99 flow. Second operand 5 states and 504 transitions. [2023-01-28 09:26:11,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 41 transitions, 247 flow [2023-01-28 09:26:11,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 41 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 09:26:11,275 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 127 flow [2023-01-28 09:26:11,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-01-28 09:26:11,276 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 8 predicate places. [2023-01-28 09:26:11,276 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 127 flow [2023-01-28 09:26:11,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:11,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:11,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 09:26:11,277 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:11,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:11,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1139161799, now seen corresponding path program 1 times [2023-01-28 09:26:11,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:11,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857367493] [2023-01-28 09:26:11,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:11,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:11,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:11,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857367493] [2023-01-28 09:26:11,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857367493] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:11,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213551713] [2023-01-28 09:26:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:11,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:11,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:11,333 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:11,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 09:26:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:11,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2023-01-28 09:26:11,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:11,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:11,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213551713] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:11,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:11,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-01-28 09:26:11,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627272622] [2023-01-28 09:26:11,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:11,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 09:26:11,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:11,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 09:26:11,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-01-28 09:26:11,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:26:11,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 127 flow. Second operand has 7 states, 7 states have (on average 96.85714285714286) internal successors, (678), 7 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:11,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:26:11,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:11,542 INFO L130 PetriNetUnfolder]: 108/175 cut-off events. [2023-01-28 09:26:11,542 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-01-28 09:26:11,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 628 conditions, 175 events. 108/175 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 466 event pairs, 0 based on Foata normal form. 16/191 useless extension candidates. Maximal degree in co-relation 289. Up to 91 conditions per place. [2023-01-28 09:26:11,544 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 31 selfloop transitions, 8 changer transitions 0/39 dead transitions. [2023-01-28 09:26:11,544 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 39 transitions, 264 flow [2023-01-28 09:26:11,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:26:11,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:26:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 500 transitions. [2023-01-28 09:26:11,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2023-01-28 09:26:11,547 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 500 transitions. [2023-01-28 09:26:11,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 500 transitions. [2023-01-28 09:26:11,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:11,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 500 transitions. [2023-01-28 09:26:11,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 100.0) internal successors, (500), 5 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,551 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,551 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 127 flow. Second operand 5 states and 500 transitions. [2023-01-28 09:26:11,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 39 transitions, 264 flow [2023-01-28 09:26:11,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 39 transitions, 252 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 09:26:11,555 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 144 flow [2023-01-28 09:26:11,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-01-28 09:26:11,556 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 10 predicate places. [2023-01-28 09:26:11,556 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 144 flow [2023-01-28 09:26:11,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 96.85714285714286) internal successors, (678), 7 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:11,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:11,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:11,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 09:26:11,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:11,762 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:11,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1197066339, now seen corresponding path program 1 times [2023-01-28 09:26:11,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:11,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336560627] [2023-01-28 09:26:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:11,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:12,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:12,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:12,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336560627] [2023-01-28 09:26:12,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336560627] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:12,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793279278] [2023-01-28 09:26:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:12,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:12,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:12,044 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:12,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 09:26:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:12,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 09:26:12,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:12,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:12,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793279278] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:12,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:12,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-01-28 09:26:12,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610253399] [2023-01-28 09:26:12,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:12,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:26:12,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:12,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:26:12,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:26:12,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:26:12,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 144 flow. Second operand has 13 states, 13 states have (on average 86.0) internal successors, (1118), 13 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:12,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:12,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:26:12,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:12,832 INFO L130 PetriNetUnfolder]: 260/427 cut-off events. [2023-01-28 09:26:12,832 INFO L131 PetriNetUnfolder]: For 528/528 co-relation queries the response was YES. [2023-01-28 09:26:12,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 427 events. 260/427 cut-off events. For 528/528 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1514 event pairs, 18 based on Foata normal form. 10/437 useless extension candidates. Maximal degree in co-relation 598. Up to 221 conditions per place. [2023-01-28 09:26:12,835 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 55 selfloop transitions, 20 changer transitions 14/89 dead transitions. [2023-01-28 09:26:12,835 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 89 transitions, 618 flow [2023-01-28 09:26:12,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 09:26:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 09:26:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 915 transitions. [2023-01-28 09:26:12,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40848214285714285 [2023-01-28 09:26:12,838 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 915 transitions. [2023-01-28 09:26:12,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 915 transitions. [2023-01-28 09:26:12,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:12,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 915 transitions. [2023-01-28 09:26:12,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 91.5) internal successors, (915), 10 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:12,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:12,844 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:12,844 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 144 flow. Second operand 10 states and 915 transitions. [2023-01-28 09:26:12,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 89 transitions, 618 flow [2023-01-28 09:26:12,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 89 transitions, 600 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 09:26:12,848 INFO L231 Difference]: Finished difference. Result has 42 places, 38 transitions, 307 flow [2023-01-28 09:26:12,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=307, PETRI_PLACES=42, PETRI_TRANSITIONS=38} [2023-01-28 09:26:12,851 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 23 predicate places. [2023-01-28 09:26:12,853 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 38 transitions, 307 flow [2023-01-28 09:26:12,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 86.0) internal successors, (1118), 13 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:12,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:12,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:12,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 09:26:13,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:13,059 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:13,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:13,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1971463267, now seen corresponding path program 2 times [2023-01-28 09:26:13,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:13,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923205449] [2023-01-28 09:26:13,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:13,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:13,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:13,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923205449] [2023-01-28 09:26:13,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923205449] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:13,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610711270] [2023-01-28 09:26:13,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:26:13,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:13,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:13,294 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:13,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 09:26:13,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:26:13,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:26:13,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 09:26:13,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:13,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:13,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610711270] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:13,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:13,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-01-28 09:26:13,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257517973] [2023-01-28 09:26:13,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:13,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:26:13,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:13,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:26:13,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-01-28 09:26:13,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:26:13,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 38 transitions, 307 flow. Second operand has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:13,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:13,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:26:13,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:14,234 INFO L130 PetriNetUnfolder]: 612/1001 cut-off events. [2023-01-28 09:26:14,234 INFO L131 PetriNetUnfolder]: For 2162/2162 co-relation queries the response was YES. [2023-01-28 09:26:14,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4380 conditions, 1001 events. 612/1001 cut-off events. For 2162/2162 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4333 event pairs, 30 based on Foata normal form. 7/1008 useless extension candidates. Maximal degree in co-relation 4336. Up to 537 conditions per place. [2023-01-28 09:26:14,240 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 99 selfloop transitions, 59 changer transitions 7/165 dead transitions. [2023-01-28 09:26:14,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 165 transitions, 1402 flow [2023-01-28 09:26:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 09:26:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 09:26:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1377 transitions. [2023-01-28 09:26:14,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40982142857142856 [2023-01-28 09:26:14,244 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1377 transitions. [2023-01-28 09:26:14,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1377 transitions. [2023-01-28 09:26:14,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:14,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1377 transitions. [2023-01-28 09:26:14,246 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 91.8) internal successors, (1377), 15 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:14,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:14,250 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:14,250 INFO L175 Difference]: Start difference. First operand has 42 places, 38 transitions, 307 flow. Second operand 15 states and 1377 transitions. [2023-01-28 09:26:14,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 165 transitions, 1402 flow [2023-01-28 09:26:14,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 165 transitions, 1259 flow, removed 68 selfloop flow, removed 4 redundant places. [2023-01-28 09:26:14,259 INFO L231 Difference]: Finished difference. Result has 60 places, 86 transitions, 847 flow [2023-01-28 09:26:14,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=847, PETRI_PLACES=60, PETRI_TRANSITIONS=86} [2023-01-28 09:26:14,261 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 41 predicate places. [2023-01-28 09:26:14,261 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 86 transitions, 847 flow [2023-01-28 09:26:14,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:14,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:14,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:14,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 09:26:14,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:14,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:14,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:14,467 INFO L85 PathProgramCache]: Analyzing trace with hash -237029505, now seen corresponding path program 3 times [2023-01-28 09:26:14,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:14,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014276894] [2023-01-28 09:26:14,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:14,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:14,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:14,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014276894] [2023-01-28 09:26:14,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014276894] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:14,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367670681] [2023-01-28 09:26:14,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:26:14,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:14,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:14,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:14,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 09:26:14,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 09:26:14,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:26:14,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 09:26:14,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:16,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:17,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367670681] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:17,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:17,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-01-28 09:26:17,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300532429] [2023-01-28 09:26:17,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 09:26:17,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:17,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 09:26:17,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=104, Unknown=1, NotChecked=0, Total=156 [2023-01-28 09:26:17,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:26:17,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 86 transitions, 847 flow. Second operand has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:17,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:17,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:26:17,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:17,889 INFO L130 PetriNetUnfolder]: 1100/1797 cut-off events. [2023-01-28 09:26:17,889 INFO L131 PetriNetUnfolder]: For 7302/7302 co-relation queries the response was YES. [2023-01-28 09:26:17,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9172 conditions, 1797 events. 1100/1797 cut-off events. For 7302/7302 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8789 event pairs, 172 based on Foata normal form. 4/1801 useless extension candidates. Maximal degree in co-relation 7097. Up to 977 conditions per place. [2023-01-28 09:26:17,902 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 106 selfloop transitions, 80 changer transitions 5/191 dead transitions. [2023-01-28 09:26:17,903 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 191 transitions, 2112 flow [2023-01-28 09:26:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 09:26:17,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 09:26:17,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 908 transitions. [2023-01-28 09:26:17,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40535714285714286 [2023-01-28 09:26:17,906 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 908 transitions. [2023-01-28 09:26:17,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 908 transitions. [2023-01-28 09:26:17,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:17,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 908 transitions. [2023-01-28 09:26:17,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 90.8) internal successors, (908), 10 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:17,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:17,911 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:17,911 INFO L175 Difference]: Start difference. First operand has 60 places, 86 transitions, 847 flow. Second operand 10 states and 908 transitions. [2023-01-28 09:26:17,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 191 transitions, 2112 flow [2023-01-28 09:26:17,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 191 transitions, 1928 flow, removed 89 selfloop flow, removed 2 redundant places. [2023-01-28 09:26:17,927 INFO L231 Difference]: Finished difference. Result has 71 places, 132 transitions, 1490 flow [2023-01-28 09:26:17,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1490, PETRI_PLACES=71, PETRI_TRANSITIONS=132} [2023-01-28 09:26:17,928 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 52 predicate places. [2023-01-28 09:26:17,928 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 132 transitions, 1490 flow [2023-01-28 09:26:17,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 85.84615384615384) internal successors, (1116), 13 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:17,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:17,929 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:17,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 09:26:18,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:18,133 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:18,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:18,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1704426119, now seen corresponding path program 1 times [2023-01-28 09:26:18,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:18,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589375814] [2023-01-28 09:26:18,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:18,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:18,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:18,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:18,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589375814] [2023-01-28 09:26:18,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589375814] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:18,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336361112] [2023-01-28 09:26:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:18,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:18,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:18,206 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:18,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 09:26:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:18,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 09:26:18,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:18,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:18,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336361112] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:18,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:18,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-01-28 09:26:18,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496628218] [2023-01-28 09:26:18,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:18,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:26:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:26:18,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:26:18,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:26:18,347 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 132 transitions, 1490 flow. Second operand has 10 states, 10 states have (on average 95.8) internal successors, (958), 10 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:18,347 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:18,347 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:26:18,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:18,775 INFO L130 PetriNetUnfolder]: 2041/3411 cut-off events. [2023-01-28 09:26:18,775 INFO L131 PetriNetUnfolder]: For 19991/19991 co-relation queries the response was YES. [2023-01-28 09:26:18,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18724 conditions, 3411 events. 2041/3411 cut-off events. For 19991/19991 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19781 event pairs, 67 based on Foata normal form. 64/3475 useless extension candidates. Maximal degree in co-relation 13927. Up to 1821 conditions per place. [2023-01-28 09:26:18,797 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 324 selfloop transitions, 103 changer transitions 5/432 dead transitions. [2023-01-28 09:26:18,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 432 transitions, 5461 flow [2023-01-28 09:26:18,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 09:26:18,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 09:26:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1205 transitions. [2023-01-28 09:26:18,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44828869047619047 [2023-01-28 09:26:18,800 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1205 transitions. [2023-01-28 09:26:18,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1205 transitions. [2023-01-28 09:26:18,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:18,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1205 transitions. [2023-01-28 09:26:18,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 100.41666666666667) internal successors, (1205), 12 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:18,805 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:18,805 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:18,805 INFO L175 Difference]: Start difference. First operand has 71 places, 132 transitions, 1490 flow. Second operand 12 states and 1205 transitions. [2023-01-28 09:26:18,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 432 transitions, 5461 flow [2023-01-28 09:26:18,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 432 transitions, 5298 flow, removed 69 selfloop flow, removed 3 redundant places. [2023-01-28 09:26:18,861 INFO L231 Difference]: Finished difference. Result has 87 places, 217 transitions, 3056 flow [2023-01-28 09:26:18,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1448, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3056, PETRI_PLACES=87, PETRI_TRANSITIONS=217} [2023-01-28 09:26:18,861 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 68 predicate places. [2023-01-28 09:26:18,861 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 217 transitions, 3056 flow [2023-01-28 09:26:18,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 95.8) internal successors, (958), 10 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:18,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:18,862 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:18,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 09:26:19,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:19,069 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:19,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:19,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1605359529, now seen corresponding path program 2 times [2023-01-28 09:26:19,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:19,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692052136] [2023-01-28 09:26:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:19,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:19,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:19,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692052136] [2023-01-28 09:26:19,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692052136] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:19,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100066620] [2023-01-28 09:26:19,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:26:19,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:19,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:19,343 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:19,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 09:26:19,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:26:19,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:26:19,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 09:26:19,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:22,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:22,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 09:26:22,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100066620] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:22,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:22,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-01-28 09:26:22,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258404163] [2023-01-28 09:26:22,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:22,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 09:26:22,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:22,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 09:26:22,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-01-28 09:26:22,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:26:22,608 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 217 transitions, 3056 flow. Second operand has 17 states, 17 states have (on average 85.47058823529412) internal successors, (1453), 17 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:22,608 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:22,608 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:26:22,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:26,350 INFO L130 PetriNetUnfolder]: 2497/4190 cut-off events. [2023-01-28 09:26:26,350 INFO L131 PetriNetUnfolder]: For 38200/38200 co-relation queries the response was YES. [2023-01-28 09:26:26,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27532 conditions, 4190 events. 2497/4190 cut-off events. For 38200/38200 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25238 event pairs, 196 based on Foata normal form. 12/4202 useless extension candidates. Maximal degree in co-relation 24298. Up to 3160 conditions per place. [2023-01-28 09:26:26,388 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 330 selfloop transitions, 86 changer transitions 25/441 dead transitions. [2023-01-28 09:26:26,389 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 441 transitions, 6700 flow [2023-01-28 09:26:26,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 09:26:26,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 09:26:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1559 transitions. [2023-01-28 09:26:26,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40940126050420167 [2023-01-28 09:26:26,392 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1559 transitions. [2023-01-28 09:26:26,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1559 transitions. [2023-01-28 09:26:26,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:26,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1559 transitions. [2023-01-28 09:26:26,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 91.70588235294117) internal successors, (1559), 17 states have internal predecessors, (1559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:26,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 224.0) internal successors, (4032), 18 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:26,400 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 224.0) internal successors, (4032), 18 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:26,400 INFO L175 Difference]: Start difference. First operand has 87 places, 217 transitions, 3056 flow. Second operand 17 states and 1559 transitions. [2023-01-28 09:26:26,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 441 transitions, 6700 flow [2023-01-28 09:26:26,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 441 transitions, 6019 flow, removed 336 selfloop flow, removed 1 redundant places. [2023-01-28 09:26:26,468 INFO L231 Difference]: Finished difference. Result has 109 places, 277 transitions, 4044 flow [2023-01-28 09:26:26,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2735, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4044, PETRI_PLACES=109, PETRI_TRANSITIONS=277} [2023-01-28 09:26:26,469 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 90 predicate places. [2023-01-28 09:26:26,469 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 277 transitions, 4044 flow [2023-01-28 09:26:26,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.47058823529412) internal successors, (1453), 17 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:26,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:26,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:26,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 09:26:26,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:26,677 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:26,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash -834738333, now seen corresponding path program 3 times [2023-01-28 09:26:26,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:26,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942110681] [2023-01-28 09:26:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:26,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:26,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:26,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:26,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942110681] [2023-01-28 09:26:26,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942110681] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:26,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749141841] [2023-01-28 09:26:26,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:26:26,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:26,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:26,881 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:26,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 09:26:26,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 09:26:26,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:26:26,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 09:26:26,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:28,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 09:26:29,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749141841] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:29,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:29,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 4] total 13 [2023-01-28 09:26:29,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750869778] [2023-01-28 09:26:29,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:29,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 09:26:29,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:29,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 09:26:29,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-01-28 09:26:29,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 224 [2023-01-28 09:26:29,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 277 transitions, 4044 flow. Second operand has 15 states, 15 states have (on average 91.53333333333333) internal successors, (1373), 15 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:29,042 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:29,042 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 224 [2023-01-28 09:26:29,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:32,265 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 [0] [2023-01-28 09:26:33,318 INFO L130 PetriNetUnfolder]: 2896/4900 cut-off events. [2023-01-28 09:26:33,318 INFO L131 PetriNetUnfolder]: For 54216/54216 co-relation queries the response was YES. [2023-01-28 09:26:33,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32679 conditions, 4900 events. 2896/4900 cut-off events. For 54216/54216 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 30934 event pairs, 210 based on Foata normal form. 27/4927 useless extension candidates. Maximal degree in co-relation 32097. Up to 3748 conditions per place. [2023-01-28 09:26:33,348 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 344 selfloop transitions, 135 changer transitions 18/497 dead transitions. [2023-01-28 09:26:33,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 497 transitions, 7814 flow [2023-01-28 09:26:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 09:26:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 09:26:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2042 transitions. [2023-01-28 09:26:33,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4340986394557823 [2023-01-28 09:26:33,353 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2042 transitions. [2023-01-28 09:26:33,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2042 transitions. [2023-01-28 09:26:33,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:33,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2042 transitions. [2023-01-28 09:26:33,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 97.23809523809524) internal successors, (2042), 21 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:33,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:33,362 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:33,362 INFO L175 Difference]: Start difference. First operand has 109 places, 277 transitions, 4044 flow. Second operand 21 states and 2042 transitions. [2023-01-28 09:26:33,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 497 transitions, 7814 flow [2023-01-28 09:26:33,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 497 transitions, 7220 flow, removed 287 selfloop flow, removed 7 redundant places. [2023-01-28 09:26:33,469 INFO L231 Difference]: Finished difference. Result has 132 places, 369 transitions, 5951 flow [2023-01-28 09:26:33,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5951, PETRI_PLACES=132, PETRI_TRANSITIONS=369} [2023-01-28 09:26:33,470 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 113 predicate places. [2023-01-28 09:26:33,470 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 369 transitions, 5951 flow [2023-01-28 09:26:33,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 91.53333333333333) internal successors, (1373), 15 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:33,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:33,470 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:33,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 09:26:33,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:33,675 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:33,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash -922612837, now seen corresponding path program 4 times [2023-01-28 09:26:33,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:33,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327855190] [2023-01-28 09:26:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:33,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:33,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:33,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327855190] [2023-01-28 09:26:33,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327855190] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:33,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392482843] [2023-01-28 09:26:33,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:26:33,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:33,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:33,748 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:33,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 09:26:33,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:26:33,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:26:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 09:26:33,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:33,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:33,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392482843] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:33,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:33,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-01-28 09:26:33,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039715215] [2023-01-28 09:26:33,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:33,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 09:26:33,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:33,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 09:26:33,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-01-28 09:26:33,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:26:33,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 369 transitions, 5951 flow. Second operand has 9 states, 9 states have (on average 96.22222222222223) internal successors, (866), 9 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:33,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:33,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:26:33,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:34,815 INFO L130 PetriNetUnfolder]: 3271/5800 cut-off events. [2023-01-28 09:26:34,815 INFO L131 PetriNetUnfolder]: For 71785/71785 co-relation queries the response was YES. [2023-01-28 09:26:34,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39823 conditions, 5800 events. 3271/5800 cut-off events. For 71785/71785 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40295 event pairs, 296 based on Foata normal form. 40/5840 useless extension candidates. Maximal degree in co-relation 37952. Up to 2273 conditions per place. [2023-01-28 09:26:34,852 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 339 selfloop transitions, 316 changer transitions 6/661 dead transitions. [2023-01-28 09:26:34,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 661 transitions, 11513 flow [2023-01-28 09:26:34,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 09:26:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 09:26:34,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1395 transitions. [2023-01-28 09:26:34,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448341836734694 [2023-01-28 09:26:34,855 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1395 transitions. [2023-01-28 09:26:34,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1395 transitions. [2023-01-28 09:26:34,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:34,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1395 transitions. [2023-01-28 09:26:34,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 99.64285714285714) internal successors, (1395), 14 states have internal predecessors, (1395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:34,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:34,860 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:34,860 INFO L175 Difference]: Start difference. First operand has 132 places, 369 transitions, 5951 flow. Second operand 14 states and 1395 transitions. [2023-01-28 09:26:34,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 661 transitions, 11513 flow [2023-01-28 09:26:35,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 661 transitions, 10434 flow, removed 527 selfloop flow, removed 7 redundant places. [2023-01-28 09:26:35,077 INFO L231 Difference]: Finished difference. Result has 146 places, 467 transitions, 8053 flow [2023-01-28 09:26:35,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5174, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8053, PETRI_PLACES=146, PETRI_TRANSITIONS=467} [2023-01-28 09:26:35,078 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 127 predicate places. [2023-01-28 09:26:35,078 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 467 transitions, 8053 flow [2023-01-28 09:26:35,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 96.22222222222223) internal successors, (866), 9 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:35,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:35,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:35,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-28 09:26:35,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 09:26:35,279 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:35,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:35,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1944370241, now seen corresponding path program 5 times [2023-01-28 09:26:35,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:35,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267184971] [2023-01-28 09:26:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:35,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:35,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:35,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:35,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267184971] [2023-01-28 09:26:35,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267184971] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:35,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767102570] [2023-01-28 09:26:35,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:26:35,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:35,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:35,508 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:35,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 09:26:35,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 09:26:35,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:26:35,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 09:26:35,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:35,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:36,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767102570] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:36,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:36,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-01-28 09:26:36,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822152606] [2023-01-28 09:26:36,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:36,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 09:26:36,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:36,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 09:26:36,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-01-28 09:26:36,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 224 [2023-01-28 09:26:36,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 467 transitions, 8053 flow. Second operand has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:36,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:36,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 224 [2023-01-28 09:26:36,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:41,006 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 [0] [2023-01-28 09:26:47,770 INFO L130 PetriNetUnfolder]: 4345/7642 cut-off events. [2023-01-28 09:26:47,770 INFO L131 PetriNetUnfolder]: For 112133/112133 co-relation queries the response was YES. [2023-01-28 09:26:47,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57273 conditions, 7642 events. 4345/7642 cut-off events. For 112133/112133 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55220 event pairs, 238 based on Foata normal form. 19/7661 useless extension candidates. Maximal degree in co-relation 54841. Up to 3059 conditions per place. [2023-01-28 09:26:47,816 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 353 selfloop transitions, 565 changer transitions 21/939 dead transitions. [2023-01-28 09:26:47,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 939 transitions, 17802 flow [2023-01-28 09:26:47,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 09:26:47,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 09:26:47,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3264 transitions. [2023-01-28 09:26:47,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2023-01-28 09:26:47,820 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3264 transitions. [2023-01-28 09:26:47,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3264 transitions. [2023-01-28 09:26:47,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:47,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3264 transitions. [2023-01-28 09:26:47,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 96.0) internal successors, (3264), 34 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:47,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:47,830 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:47,830 INFO L175 Difference]: Start difference. First operand has 146 places, 467 transitions, 8053 flow. Second operand 34 states and 3264 transitions. [2023-01-28 09:26:47,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 939 transitions, 17802 flow [2023-01-28 09:26:48,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 939 transitions, 16869 flow, removed 454 selfloop flow, removed 3 redundant places. [2023-01-28 09:26:48,245 INFO L231 Difference]: Finished difference. Result has 188 places, 753 transitions, 15432 flow [2023-01-28 09:26:48,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=7632, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=15432, PETRI_PLACES=188, PETRI_TRANSITIONS=753} [2023-01-28 09:26:48,246 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 169 predicate places. [2023-01-28 09:26:48,246 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 753 transitions, 15432 flow [2023-01-28 09:26:48,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:48,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:48,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:48,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-28 09:26:48,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:48,451 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:48,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:48,451 INFO L85 PathProgramCache]: Analyzing trace with hash -620121257, now seen corresponding path program 6 times [2023-01-28 09:26:48,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:48,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55420046] [2023-01-28 09:26:48,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:48,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:48,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:48,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55420046] [2023-01-28 09:26:48,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55420046] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:48,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441501354] [2023-01-28 09:26:48,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:26:48,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:48,539 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:48,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 09:26:48,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 09:26:48,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:26:48,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 09:26:48,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:48,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:48,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441501354] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:48,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:48,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-01-28 09:26:48,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218108793] [2023-01-28 09:26:48,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:48,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:26:48,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:48,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:26:48,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:26:48,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:26:48,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 753 transitions, 15432 flow. Second operand has 10 states, 10 states have (on average 95.9) internal successors, (959), 10 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:48,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:48,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:26:48,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:50,805 INFO L130 PetriNetUnfolder]: 5225/9187 cut-off events. [2023-01-28 09:26:50,805 INFO L131 PetriNetUnfolder]: For 149556/149556 co-relation queries the response was YES. [2023-01-28 09:26:50,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72583 conditions, 9187 events. 5225/9187 cut-off events. For 149556/149556 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 68369 event pairs, 424 based on Foata normal form. 174/9361 useless extension candidates. Maximal degree in co-relation 70289. Up to 3335 conditions per place. [2023-01-28 09:26:50,869 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 574 selfloop transitions, 625 changer transitions 0/1199 dead transitions. [2023-01-28 09:26:50,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1199 transitions, 25589 flow [2023-01-28 09:26:50,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 09:26:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 09:26:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1398 transitions. [2023-01-28 09:26:50,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4457908163265306 [2023-01-28 09:26:50,872 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1398 transitions. [2023-01-28 09:26:50,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1398 transitions. [2023-01-28 09:26:50,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:50,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1398 transitions. [2023-01-28 09:26:50,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 99.85714285714286) internal successors, (1398), 14 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:50,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:50,876 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 224.0) internal successors, (3360), 15 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:50,876 INFO L175 Difference]: Start difference. First operand has 188 places, 753 transitions, 15432 flow. Second operand 14 states and 1398 transitions. [2023-01-28 09:26:50,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1199 transitions, 25589 flow [2023-01-28 09:26:51,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 1199 transitions, 22613 flow, removed 1469 selfloop flow, removed 7 redundant places. [2023-01-28 09:26:51,892 INFO L231 Difference]: Finished difference. Result has 202 places, 948 transitions, 19816 flow [2023-01-28 09:26:51,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=13331, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=439, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=19816, PETRI_PLACES=202, PETRI_TRANSITIONS=948} [2023-01-28 09:26:51,893 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 183 predicate places. [2023-01-28 09:26:51,893 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 948 transitions, 19816 flow [2023-01-28 09:26:51,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 95.9) internal successors, (959), 10 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:51,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:51,893 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:51,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 09:26:52,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 09:26:52,098 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:52,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:52,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1394518185, now seen corresponding path program 7 times [2023-01-28 09:26:52,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:52,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413741767] [2023-01-28 09:26:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:52,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:52,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:52,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:52,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413741767] [2023-01-28 09:26:52,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413741767] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:52,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131109152] [2023-01-28 09:26:52,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:26:52,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:52,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:52,166 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:52,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 09:26:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:52,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 09:26:52,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:52,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:26:52,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131109152] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:52,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:52,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-01-28 09:26:52,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755156040] [2023-01-28 09:26:52,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:52,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 09:26:52,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 09:26:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-01-28 09:26:52,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:26:52,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 948 transitions, 19816 flow. Second operand has 9 states, 9 states have (on average 96.33333333333333) internal successors, (867), 9 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:52,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:52,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:26:52,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:26:54,867 INFO L130 PetriNetUnfolder]: 5565/9746 cut-off events. [2023-01-28 09:26:54,867 INFO L131 PetriNetUnfolder]: For 182839/182839 co-relation queries the response was YES. [2023-01-28 09:26:54,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81471 conditions, 9746 events. 5565/9746 cut-off events. For 182839/182839 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 73520 event pairs, 108 based on Foata normal form. 100/9846 useless extension candidates. Maximal degree in co-relation 79428. Up to 3519 conditions per place. [2023-01-28 09:26:54,937 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 977 selfloop transitions, 485 changer transitions 0/1462 dead transitions. [2023-01-28 09:26:54,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 1462 transitions, 29781 flow [2023-01-28 09:26:54,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 09:26:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 09:26:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1491 transitions. [2023-01-28 09:26:54,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44375 [2023-01-28 09:26:54,940 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1491 transitions. [2023-01-28 09:26:54,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1491 transitions. [2023-01-28 09:26:54,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:26:54,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1491 transitions. [2023-01-28 09:26:54,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 99.4) internal successors, (1491), 15 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:54,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:54,944 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:54,944 INFO L175 Difference]: Start difference. First operand has 202 places, 948 transitions, 19816 flow. Second operand 15 states and 1491 transitions. [2023-01-28 09:26:54,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 1462 transitions, 29781 flow [2023-01-28 09:26:56,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1462 transitions, 29286 flow, removed 197 selfloop flow, removed 4 redundant places. [2023-01-28 09:26:56,249 INFO L231 Difference]: Finished difference. Result has 216 places, 1043 transitions, 22932 flow [2023-01-28 09:26:56,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=19031, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=930, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22932, PETRI_PLACES=216, PETRI_TRANSITIONS=1043} [2023-01-28 09:26:56,250 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 197 predicate places. [2023-01-28 09:26:56,250 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 1043 transitions, 22932 flow [2023-01-28 09:26:56,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 96.33333333333333) internal successors, (867), 9 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:56,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:26:56,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:26:56,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 09:26:56,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 09:26:56,451 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:26:56,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:26:56,451 INFO L85 PathProgramCache]: Analyzing trace with hash -231131307, now seen corresponding path program 8 times [2023-01-28 09:26:56,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:26:56,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050369856] [2023-01-28 09:26:56,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:26:56,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:26:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:26:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:56,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:26:56,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050369856] [2023-01-28 09:26:56,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050369856] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:26:56,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398889311] [2023-01-28 09:26:56,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:26:56,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:26:56,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:26:56,696 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:26:56,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 09:26:56,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:26:56,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:26:56,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 09:26:56,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:26:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:57,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:26:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:26:57,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398889311] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:26:57,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:26:57,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 16 [2023-01-28 09:26:57,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643440581] [2023-01-28 09:26:57,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:26:57,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 09:26:57,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:26:57,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 09:26:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2023-01-28 09:26:57,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 224 [2023-01-28 09:26:57,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 1043 transitions, 22932 flow. Second operand has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:26:57,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:26:57,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 224 [2023-01-28 09:26:57,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:04,277 INFO L130 PetriNetUnfolder]: 8047/14085 cut-off events. [2023-01-28 09:27:04,277 INFO L131 PetriNetUnfolder]: For 326478/326478 co-relation queries the response was YES. [2023-01-28 09:27:04,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128774 conditions, 14085 events. 8047/14085 cut-off events. For 326478/326478 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 111551 event pairs, 521 based on Foata normal form. 40/14125 useless extension candidates. Maximal degree in co-relation 125806. Up to 5312 conditions per place. [2023-01-28 09:27:04,413 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 700 selfloop transitions, 1174 changer transitions 37/1911 dead transitions. [2023-01-28 09:27:04,414 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1911 transitions, 47117 flow [2023-01-28 09:27:04,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 09:27:04,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 09:27:04,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3841 transitions. [2023-01-28 09:27:04,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42868303571428573 [2023-01-28 09:27:04,418 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3841 transitions. [2023-01-28 09:27:04,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3841 transitions. [2023-01-28 09:27:04,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:04,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3841 transitions. [2023-01-28 09:27:04,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 96.025) internal successors, (3841), 40 states have internal predecessors, (3841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:04,429 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 224.0) internal successors, (9184), 41 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:04,430 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 224.0) internal successors, (9184), 41 states have internal predecessors, (9184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:04,430 INFO L175 Difference]: Start difference. First operand has 216 places, 1043 transitions, 22932 flow. Second operand 40 states and 3841 transitions. [2023-01-28 09:27:04,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1911 transitions, 47117 flow [2023-01-28 09:27:07,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 1911 transitions, 45876 flow, removed 616 selfloop flow, removed 1 redundant places. [2023-01-28 09:27:07,274 INFO L231 Difference]: Finished difference. Result has 267 places, 1629 transitions, 42950 flow [2023-01-28 09:27:07,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=22561, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=664, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=42950, PETRI_PLACES=267, PETRI_TRANSITIONS=1629} [2023-01-28 09:27:07,275 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 248 predicate places. [2023-01-28 09:27:07,275 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 1629 transitions, 42950 flow [2023-01-28 09:27:07,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 91.38888888888889) internal successors, (1645), 18 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:07,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:07,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:07,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:07,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 09:27:07,476 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:07,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:07,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1040135160, now seen corresponding path program 9 times [2023-01-28 09:27:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:07,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728420057] [2023-01-28 09:27:07,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:07,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:07,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 09:27:07,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:07,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728420057] [2023-01-28 09:27:07,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728420057] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:07,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942854151] [2023-01-28 09:27:07,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:27:07,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:07,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:07,550 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:07,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 09:27:07,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 09:27:07,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:07,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 09:27:07,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:07,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 09:27:07,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 09:27:07,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942854151] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:07,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:07,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-01-28 09:27:07,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112722262] [2023-01-28 09:27:07,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:07,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:27:07,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:07,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:27:07,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:27:07,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:27:07,727 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 1629 transitions, 42950 flow. Second operand has 10 states, 10 states have (on average 96.4) internal successors, (964), 10 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:07,727 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:07,727 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:27:07,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:13,908 INFO L130 PetriNetUnfolder]: 8442/14653 cut-off events. [2023-01-28 09:27:13,909 INFO L131 PetriNetUnfolder]: For 399821/399821 co-relation queries the response was YES. [2023-01-28 09:27:13,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143821 conditions, 14653 events. 8442/14653 cut-off events. For 399821/399821 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 115025 event pairs, 788 based on Foata normal form. 634/15287 useless extension candidates. Maximal degree in co-relation 141070. Up to 12266 conditions per place. [2023-01-28 09:27:14,035 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1635 selfloop transitions, 303 changer transitions 0/1938 dead transitions. [2023-01-28 09:27:14,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1938 transitions, 53143 flow [2023-01-28 09:27:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 09:27:14,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 09:27:14,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1311 transitions. [2023-01-28 09:27:14,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45020604395604397 [2023-01-28 09:27:14,037 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1311 transitions. [2023-01-28 09:27:14,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1311 transitions. [2023-01-28 09:27:14,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:14,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1311 transitions. [2023-01-28 09:27:14,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 100.84615384615384) internal successors, (1311), 13 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:14,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:14,040 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 224.0) internal successors, (3136), 14 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:14,040 INFO L175 Difference]: Start difference. First operand has 267 places, 1629 transitions, 42950 flow. Second operand 13 states and 1311 transitions. [2023-01-28 09:27:14,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1938 transitions, 53143 flow [2023-01-28 09:27:18,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 1938 transitions, 48203 flow, removed 2459 selfloop flow, removed 4 redundant places. [2023-01-28 09:27:18,355 INFO L231 Difference]: Finished difference. Result has 281 places, 1785 transitions, 43291 flow [2023-01-28 09:27:18,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=37157, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=43291, PETRI_PLACES=281, PETRI_TRANSITIONS=1785} [2023-01-28 09:27:18,356 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 262 predicate places. [2023-01-28 09:27:18,356 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 1785 transitions, 43291 flow [2023-01-28 09:27:18,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 96.4) internal successors, (964), 10 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:18,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:18,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:18,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 09:27:18,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 09:27:18,557 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:18,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1915724884, now seen corresponding path program 10 times [2023-01-28 09:27:18,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:18,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384708086] [2023-01-28 09:27:18,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:18,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 09:27:18,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:18,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384708086] [2023-01-28 09:27:18,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384708086] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:18,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250240055] [2023-01-28 09:27:18,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:27:18,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:18,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:18,597 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:18,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 09:27:18,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:27:18,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:18,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 09:27:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 09:27:18,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:18,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 09:27:18,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250240055] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:18,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:18,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 09:27:18,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713422] [2023-01-28 09:27:18,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:18,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 09:27:18,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:18,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 09:27:18,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-01-28 09:27:18,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 224 [2023-01-28 09:27:18,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 1785 transitions, 43291 flow. Second operand has 8 states, 8 states have (on average 99.875) internal successors, (799), 8 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:18,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:18,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 224 [2023-01-28 09:27:18,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:22,636 INFO L130 PetriNetUnfolder]: 5394/9414 cut-off events. [2023-01-28 09:27:22,636 INFO L131 PetriNetUnfolder]: For 261369/261369 co-relation queries the response was YES. [2023-01-28 09:27:22,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87297 conditions, 9414 events. 5394/9414 cut-off events. For 261369/261369 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 69416 event pairs, 392 based on Foata normal form. 578/9992 useless extension candidates. Maximal degree in co-relation 86898. Up to 5483 conditions per place. [2023-01-28 09:27:22,729 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 1028 selfloop transitions, 306 changer transitions 0/1334 dead transitions. [2023-01-28 09:27:22,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 1334 transitions, 34192 flow [2023-01-28 09:27:22,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:27:22,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:27:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 526 transitions. [2023-01-28 09:27:22,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46964285714285714 [2023-01-28 09:27:22,731 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 526 transitions. [2023-01-28 09:27:22,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 526 transitions. [2023-01-28 09:27:22,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:22,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 526 transitions. [2023-01-28 09:27:22,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 105.2) internal successors, (526), 5 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:22,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:22,732 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:22,732 INFO L175 Difference]: Start difference. First operand has 281 places, 1785 transitions, 43291 flow. Second operand 5 states and 526 transitions. [2023-01-28 09:27:22,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 1334 transitions, 34192 flow [2023-01-28 09:27:25,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 1334 transitions, 31457 flow, removed 729 selfloop flow, removed 15 redundant places. [2023-01-28 09:27:25,339 INFO L231 Difference]: Finished difference. Result has 271 places, 1195 transitions, 27062 flow [2023-01-28 09:27:25,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=24503, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=27062, PETRI_PLACES=271, PETRI_TRANSITIONS=1195} [2023-01-28 09:27:25,340 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 252 predicate places. [2023-01-28 09:27:25,340 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 1195 transitions, 27062 flow [2023-01-28 09:27:25,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 99.875) internal successors, (799), 8 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:25,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:25,341 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:25,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:25,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:25,545 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:25,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:25,545 INFO L85 PathProgramCache]: Analyzing trace with hash 793995680, now seen corresponding path program 11 times [2023-01-28 09:27:25,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:25,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811938326] [2023-01-28 09:27:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 09:27:25,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811938326] [2023-01-28 09:27:25,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811938326] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636544385] [2023-01-28 09:27:25,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:27:25,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:25,609 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:25,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 09:27:25,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-01-28 09:27:25,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:25,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 09:27:25,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 09:27:25,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 09:27:25,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636544385] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:25,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:25,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-01-28 09:27:25,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147830799] [2023-01-28 09:27:25,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:25,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 09:27:25,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:25,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 09:27:25,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-01-28 09:27:25,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:27:25,742 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 1195 transitions, 27062 flow. Second operand has 9 states, 9 states have (on average 96.33333333333333) internal successors, (867), 9 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:25,742 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:25,742 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:27:25,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:28,789 INFO L130 PetriNetUnfolder]: 5514/9733 cut-off events. [2023-01-28 09:27:28,789 INFO L131 PetriNetUnfolder]: For 240336/240336 co-relation queries the response was YES. [2023-01-28 09:27:28,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88938 conditions, 9733 events. 5514/9733 cut-off events. For 240336/240336 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 73126 event pairs, 256 based on Foata normal form. 14/9747 useless extension candidates. Maximal degree in co-relation 88596. Up to 6525 conditions per place. [2023-01-28 09:27:28,884 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1177 selfloop transitions, 154 changer transitions 21/1352 dead transitions. [2023-01-28 09:27:28,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1352 transitions, 32334 flow [2023-01-28 09:27:28,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 09:27:28,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 09:27:28,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1486 transitions. [2023-01-28 09:27:28,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44226190476190474 [2023-01-28 09:27:28,886 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1486 transitions. [2023-01-28 09:27:28,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1486 transitions. [2023-01-28 09:27:28,886 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:28,886 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1486 transitions. [2023-01-28 09:27:28,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 99.06666666666666) internal successors, (1486), 15 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:28,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:28,889 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:28,889 INFO L175 Difference]: Start difference. First operand has 271 places, 1195 transitions, 27062 flow. Second operand 15 states and 1486 transitions. [2023-01-28 09:27:28,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1352 transitions, 32334 flow [2023-01-28 09:27:31,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1352 transitions, 32067 flow, removed 130 selfloop flow, removed 2 redundant places. [2023-01-28 09:27:31,268 INFO L231 Difference]: Finished difference. Result has 287 places, 1243 transitions, 28234 flow [2023-01-28 09:27:31,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=26354, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1047, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=28234, PETRI_PLACES=287, PETRI_TRANSITIONS=1243} [2023-01-28 09:27:31,270 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 268 predicate places. [2023-01-28 09:27:31,270 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 1243 transitions, 28234 flow [2023-01-28 09:27:31,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 96.33333333333333) internal successors, (867), 9 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:31,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:31,270 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:31,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:31,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 09:27:31,474 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:31,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:31,475 INFO L85 PathProgramCache]: Analyzing trace with hash -965795692, now seen corresponding path program 12 times [2023-01-28 09:27:31,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:31,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845161518] [2023-01-28 09:27:31,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:31,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:27:31,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:31,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845161518] [2023-01-28 09:27:31,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845161518] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:31,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888610645] [2023-01-28 09:27:31,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:27:31,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:31,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:31,545 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:31,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 09:27:31,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 09:27:31,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:31,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 09:27:31,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:27:31,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:31,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:27:31,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888610645] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:31,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:31,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-01-28 09:27:31,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397573367] [2023-01-28 09:27:31,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:31,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-01-28 09:27:31,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:31,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-01-28 09:27:31,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:27:31,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:27:31,679 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 1243 transitions, 28234 flow. Second operand has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:31,679 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:31,679 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:27:31,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:35,415 INFO L130 PetriNetUnfolder]: 6399/11444 cut-off events. [2023-01-28 09:27:35,415 INFO L131 PetriNetUnfolder]: For 326691/326691 co-relation queries the response was YES. [2023-01-28 09:27:35,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106616 conditions, 11444 events. 6399/11444 cut-off events. For 326691/326691 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 89124 event pairs, 242 based on Foata normal form. 212/11656 useless extension candidates. Maximal degree in co-relation 105576. Up to 4631 conditions per place. [2023-01-28 09:27:35,525 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1099 selfloop transitions, 462 changer transitions 121/1682 dead transitions. [2023-01-28 09:27:35,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1682 transitions, 39344 flow [2023-01-28 09:27:35,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 09:27:35,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 09:27:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1192 transitions. [2023-01-28 09:27:35,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2023-01-28 09:27:35,527 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1192 transitions. [2023-01-28 09:27:35,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1192 transitions. [2023-01-28 09:27:35,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:35,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1192 transitions. [2023-01-28 09:27:35,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 99.33333333333333) internal successors, (1192), 12 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:35,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:35,530 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 224.0) internal successors, (2912), 13 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:35,530 INFO L175 Difference]: Start difference. First operand has 287 places, 1243 transitions, 28234 flow. Second operand 12 states and 1192 transitions. [2023-01-28 09:27:35,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1682 transitions, 39344 flow [2023-01-28 09:27:38,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 1682 transitions, 38745 flow, removed 293 selfloop flow, removed 2 redundant places. [2023-01-28 09:27:38,537 INFO L231 Difference]: Finished difference. Result has 302 places, 1297 transitions, 30938 flow [2023-01-28 09:27:38,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=26055, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=30938, PETRI_PLACES=302, PETRI_TRANSITIONS=1297} [2023-01-28 09:27:38,538 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 283 predicate places. [2023-01-28 09:27:38,538 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 1297 transitions, 30938 flow [2023-01-28 09:27:38,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 96.0) internal successors, (960), 10 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:38,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:38,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:38,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 09:27:38,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:38,743 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:38,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash 92124486, now seen corresponding path program 13 times [2023-01-28 09:27:38,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:38,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022829304] [2023-01-28 09:27:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:38,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:38,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022829304] [2023-01-28 09:27:38,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022829304] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:38,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662507548] [2023-01-28 09:27:38,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:27:38,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:38,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:38,799 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:38,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 09:27:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:38,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2023-01-28 09:27:38,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:38,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:27:38,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662507548] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:38,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:38,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 8 [2023-01-28 09:27:38,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613505205] [2023-01-28 09:27:38,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:38,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 09:27:38,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:38,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 09:27:38,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-01-28 09:27:38,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:27:38,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 1297 transitions, 30938 flow. Second operand has 9 states, 9 states have (on average 96.44444444444444) internal successors, (868), 9 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:38,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:38,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:27:38,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:42,845 INFO L130 PetriNetUnfolder]: 6081/10853 cut-off events. [2023-01-28 09:27:42,845 INFO L131 PetriNetUnfolder]: For 370313/370313 co-relation queries the response was YES. [2023-01-28 09:27:42,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106692 conditions, 10853 events. 6081/10853 cut-off events. For 370313/370313 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 83047 event pairs, 466 based on Foata normal form. 366/11219 useless extension candidates. Maximal degree in co-relation 105441. Up to 6459 conditions per place. [2023-01-28 09:27:42,959 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 999 selfloop transitions, 540 changer transitions 2/1541 dead transitions. [2023-01-28 09:27:42,959 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 1541 transitions, 38699 flow [2023-01-28 09:27:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 09:27:42,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 09:27:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1100 transitions. [2023-01-28 09:27:42,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2023-01-28 09:27:42,961 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1100 transitions. [2023-01-28 09:27:42,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1100 transitions. [2023-01-28 09:27:42,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:42,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1100 transitions. [2023-01-28 09:27:42,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 100.0) internal successors, (1100), 11 states have internal predecessors, (1100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:42,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:42,963 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:42,964 INFO L175 Difference]: Start difference. First operand has 302 places, 1297 transitions, 30938 flow. Second operand 11 states and 1100 transitions. [2023-01-28 09:27:42,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 1541 transitions, 38699 flow [2023-01-28 09:27:46,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1541 transitions, 36645 flow, removed 992 selfloop flow, removed 7 redundant places. [2023-01-28 09:27:46,984 INFO L231 Difference]: Finished difference. Result has 307 places, 1357 transitions, 32575 flow [2023-01-28 09:27:46,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=28898, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=471, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=792, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=32575, PETRI_PLACES=307, PETRI_TRANSITIONS=1357} [2023-01-28 09:27:46,985 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 288 predicate places. [2023-01-28 09:27:46,985 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 1357 transitions, 32575 flow [2023-01-28 09:27:46,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 96.44444444444444) internal successors, (868), 9 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:46,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:46,985 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:46,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-28 09:27:47,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:47,189 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:47,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:47,189 INFO L85 PathProgramCache]: Analyzing trace with hash -675962772, now seen corresponding path program 14 times [2023-01-28 09:27:47,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:47,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904078219] [2023-01-28 09:27:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:47,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:27:47,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:47,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904078219] [2023-01-28 09:27:47,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904078219] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:27:47,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:27:47,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 09:27:47,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275507109] [2023-01-28 09:27:47,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:27:47,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:27:47,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:47,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:27:47,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 09:27:47,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 224 [2023-01-28 09:27:47,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 1357 transitions, 32575 flow. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:47,234 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:47,234 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 224 [2023-01-28 09:27:47,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:50,873 INFO L130 PetriNetUnfolder]: 4822/8940 cut-off events. [2023-01-28 09:27:50,873 INFO L131 PetriNetUnfolder]: For 280364/280364 co-relation queries the response was YES. [2023-01-28 09:27:50,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87238 conditions, 8940 events. 4822/8940 cut-off events. For 280364/280364 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 68547 event pairs, 1144 based on Foata normal form. 402/9342 useless extension candidates. Maximal degree in co-relation 85433. Up to 4972 conditions per place. [2023-01-28 09:27:50,958 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 878 selfloop transitions, 235 changer transitions 220/1333 dead transitions. [2023-01-28 09:27:50,958 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 1333 transitions, 35595 flow [2023-01-28 09:27:50,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 09:27:50,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 09:27:50,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 421 transitions. [2023-01-28 09:27:50,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46986607142857145 [2023-01-28 09:27:50,959 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 421 transitions. [2023-01-28 09:27:50,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 421 transitions. [2023-01-28 09:27:50,960 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:50,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 421 transitions. [2023-01-28 09:27:50,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:50,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:50,961 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:50,961 INFO L175 Difference]: Start difference. First operand has 307 places, 1357 transitions, 32575 flow. Second operand 4 states and 421 transitions. [2023-01-28 09:27:50,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 1333 transitions, 35595 flow [2023-01-28 09:27:53,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1333 transitions, 34669 flow, removed 405 selfloop flow, removed 5 redundant places. [2023-01-28 09:27:53,449 INFO L231 Difference]: Finished difference. Result has 304 places, 1027 transitions, 24701 flow [2023-01-28 09:27:53,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=27862, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=24701, PETRI_PLACES=304, PETRI_TRANSITIONS=1027} [2023-01-28 09:27:53,450 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 285 predicate places. [2023-01-28 09:27:53,450 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 1027 transitions, 24701 flow [2023-01-28 09:27:53,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:53,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:27:53,451 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:27:53,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-01-28 09:27:53,451 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:27:53,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:27:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash -16554560, now seen corresponding path program 4 times [2023-01-28 09:27:53,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:27:53,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341922800] [2023-01-28 09:27:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:27:53,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:27:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:27:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:53,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:27:53,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341922800] [2023-01-28 09:27:53,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341922800] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:27:53,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255768036] [2023-01-28 09:27:53,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:27:53,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:27:53,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:27:53,519 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:27:53,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 09:27:53,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:27:53,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:27:53,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 09:27:53,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:27:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:27:53,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:27:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:27:53,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255768036] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:27:53,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:27:53,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-01-28 09:27:53,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43389100] [2023-01-28 09:27:53,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:27:53,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:27:53,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:27:53,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:27:53,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:27:53,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:27:53,674 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 1027 transitions, 24701 flow. Second operand has 12 states, 12 states have (on average 95.66666666666667) internal successors, (1148), 12 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:53,674 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:27:53,674 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:27:53,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:27:57,322 INFO L130 PetriNetUnfolder]: 5467/10063 cut-off events. [2023-01-28 09:27:57,322 INFO L131 PetriNetUnfolder]: For 344825/344825 co-relation queries the response was YES. [2023-01-28 09:27:57,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101410 conditions, 10063 events. 5467/10063 cut-off events. For 344825/344825 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 76325 event pairs, 514 based on Foata normal form. 132/10195 useless extension candidates. Maximal degree in co-relation 99551. Up to 3245 conditions per place. [2023-01-28 09:27:57,426 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 753 selfloop transitions, 839 changer transitions 1/1593 dead transitions. [2023-01-28 09:27:57,426 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 1593 transitions, 40963 flow [2023-01-28 09:27:57,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 09:27:57,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 09:27:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2299 transitions. [2023-01-28 09:27:57,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44623447204968947 [2023-01-28 09:27:57,428 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2299 transitions. [2023-01-28 09:27:57,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2299 transitions. [2023-01-28 09:27:57,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:27:57,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2299 transitions. [2023-01-28 09:27:57,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 99.95652173913044) internal successors, (2299), 23 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:57,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:57,434 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:27:57,434 INFO L175 Difference]: Start difference. First operand has 304 places, 1027 transitions, 24701 flow. Second operand 23 states and 2299 transitions. [2023-01-28 09:27:57,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 1593 transitions, 40963 flow [2023-01-28 09:28:00,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1593 transitions, 40088 flow, removed 238 selfloop flow, removed 7 redundant places. [2023-01-28 09:28:00,097 INFO L231 Difference]: Finished difference. Result has 329 places, 1331 transitions, 35950 flow [2023-01-28 09:28:00,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=24098, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=35950, PETRI_PLACES=329, PETRI_TRANSITIONS=1331} [2023-01-28 09:28:00,099 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 310 predicate places. [2023-01-28 09:28:00,099 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 1331 transitions, 35950 flow [2023-01-28 09:28:00,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 95.66666666666667) internal successors, (1148), 12 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:00,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:00,099 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:00,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-28 09:28:00,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:00,300 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:00,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash -862660922, now seen corresponding path program 5 times [2023-01-28 09:28:00,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:00,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419618310] [2023-01-28 09:28:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:00,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:00,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:00,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:00,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419618310] [2023-01-28 09:28:00,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419618310] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:00,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809790479] [2023-01-28 09:28:00,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:28:00,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:00,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:00,373 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:00,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 09:28:00,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 09:28:00,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:00,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 09:28:00,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:00,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:28:00,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809790479] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:00,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:00,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 5] total 11 [2023-01-28 09:28:00,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119176065] [2023-01-28 09:28:00,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:00,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 09:28:00,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:00,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 09:28:00,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-01-28 09:28:00,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 224 [2023-01-28 09:28:00,565 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1331 transitions, 35950 flow. Second operand has 12 states, 12 states have (on average 95.83333333333333) internal successors, (1150), 12 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:00,565 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:00,565 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 224 [2023-01-28 09:28:00,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:05,650 INFO L130 PetriNetUnfolder]: 5260/9755 cut-off events. [2023-01-28 09:28:05,650 INFO L131 PetriNetUnfolder]: For 384579/384579 co-relation queries the response was YES. [2023-01-28 09:28:05,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103335 conditions, 9755 events. 5260/9755 cut-off events. For 384579/384579 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 74697 event pairs, 82 based on Foata normal form. 112/9867 useless extension candidates. Maximal degree in co-relation 101432. Up to 2999 conditions per place. [2023-01-28 09:28:05,743 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1024 selfloop transitions, 663 changer transitions 25/1712 dead transitions. [2023-01-28 09:28:05,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 1712 transitions, 45857 flow [2023-01-28 09:28:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 09:28:05,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 09:28:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2381 transitions. [2023-01-28 09:28:05,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44289434523809523 [2023-01-28 09:28:05,745 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2381 transitions. [2023-01-28 09:28:05,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2381 transitions. [2023-01-28 09:28:05,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:05,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2381 transitions. [2023-01-28 09:28:05,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 99.20833333333333) internal successors, (2381), 24 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:05,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:05,750 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:05,750 INFO L175 Difference]: Start difference. First operand has 329 places, 1331 transitions, 35950 flow. Second operand 24 states and 2381 transitions. [2023-01-28 09:28:05,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 1712 transitions, 45857 flow [2023-01-28 09:28:08,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 1712 transitions, 44847 flow, removed 414 selfloop flow, removed 5 redundant places. [2023-01-28 09:28:08,578 INFO L231 Difference]: Finished difference. Result has 352 places, 1341 transitions, 37421 flow [2023-01-28 09:28:08,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34224, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=37421, PETRI_PLACES=352, PETRI_TRANSITIONS=1341} [2023-01-28 09:28:08,580 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 333 predicate places. [2023-01-28 09:28:08,580 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 1341 transitions, 37421 flow [2023-01-28 09:28:08,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 95.83333333333333) internal successors, (1150), 12 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:08,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:08,580 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:08,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:08,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:08,781 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:08,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:08,781 INFO L85 PathProgramCache]: Analyzing trace with hash 793791252, now seen corresponding path program 15 times [2023-01-28 09:28:08,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:08,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188811082] [2023-01-28 09:28:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:08,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:08,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:28:08,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:08,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188811082] [2023-01-28 09:28:08,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188811082] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:08,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904589419] [2023-01-28 09:28:08,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:28:08,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:08,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:08,843 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:08,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 09:28:08,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 09:28:08,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:08,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 09:28:08,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:28:08,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:28:08,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904589419] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:08,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:08,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-01-28 09:28:08,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035460642] [2023-01-28 09:28:08,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:08,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 09:28:08,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:08,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 09:28:08,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-01-28 09:28:08,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 224 [2023-01-28 09:28:08,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 1341 transitions, 37421 flow. Second operand has 11 states, 11 states have (on average 99.54545454545455) internal successors, (1095), 11 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:08,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:08,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 224 [2023-01-28 09:28:08,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:14,983 INFO L130 PetriNetUnfolder]: 7296/13519 cut-off events. [2023-01-28 09:28:14,983 INFO L131 PetriNetUnfolder]: For 595615/595615 co-relation queries the response was YES. [2023-01-28 09:28:15,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147344 conditions, 13519 events. 7296/13519 cut-off events. For 595615/595615 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 109735 event pairs, 317 based on Foata normal form. 410/13929 useless extension candidates. Maximal degree in co-relation 145852. Up to 5039 conditions per place. [2023-01-28 09:28:15,135 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 1638 selfloop transitions, 431 changer transitions 24/2093 dead transitions. [2023-01-28 09:28:15,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 2093 transitions, 63873 flow [2023-01-28 09:28:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 09:28:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 09:28:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 739 transitions. [2023-01-28 09:28:15,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47130102040816324 [2023-01-28 09:28:15,138 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 739 transitions. [2023-01-28 09:28:15,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 739 transitions. [2023-01-28 09:28:15,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:15,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 739 transitions. [2023-01-28 09:28:15,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.57142857142857) internal successors, (739), 7 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:15,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:15,140 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 224.0) internal successors, (1792), 8 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:15,140 INFO L175 Difference]: Start difference. First operand has 352 places, 1341 transitions, 37421 flow. Second operand 7 states and 739 transitions. [2023-01-28 09:28:15,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 2093 transitions, 63873 flow [2023-01-28 09:28:20,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 2093 transitions, 60533 flow, removed 1496 selfloop flow, removed 8 redundant places. [2023-01-28 09:28:20,850 INFO L231 Difference]: Finished difference. Result has 348 places, 1388 transitions, 38612 flow [2023-01-28 09:28:20,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=33052, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=945, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=38612, PETRI_PLACES=348, PETRI_TRANSITIONS=1388} [2023-01-28 09:28:20,852 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 329 predicate places. [2023-01-28 09:28:20,852 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 1388 transitions, 38612 flow [2023-01-28 09:28:20,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 99.54545454545455) internal successors, (1095), 11 states have internal predecessors, (1095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:20,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:20,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:20,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:21,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-28 09:28:21,058 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:21,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:21,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1483838864, now seen corresponding path program 16 times [2023-01-28 09:28:21,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:21,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059623886] [2023-01-28 09:28:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:21,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:21,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:21,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059623886] [2023-01-28 09:28:21,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059623886] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:21,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899430212] [2023-01-28 09:28:21,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:28:21,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:21,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:21,352 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:21,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 09:28:21,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:28:21,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:21,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 09:28:21,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:22,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:22,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899430212] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:22,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:22,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-01-28 09:28:22,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018243535] [2023-01-28 09:28:22,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:22,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 09:28:22,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:22,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 09:28:22,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-01-28 09:28:22,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:28:22,348 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 1388 transitions, 38612 flow. Second operand has 21 states, 21 states have (on average 85.52380952380952) internal successors, (1796), 21 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:22,348 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:22,348 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:28:22,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:30,505 INFO L130 PetriNetUnfolder]: 7975/14846 cut-off events. [2023-01-28 09:28:30,506 INFO L131 PetriNetUnfolder]: For 580654/580654 co-relation queries the response was YES. [2023-01-28 09:28:30,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159108 conditions, 14846 events. 7975/14846 cut-off events. For 580654/580654 co-relation queries the response was YES. Maximal size of possible extension queue 883. Compared 122866 event pairs, 742 based on Foata normal form. 20/14866 useless extension candidates. Maximal degree in co-relation 156918. Up to 13663 conditions per place. [2023-01-28 09:28:30,674 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1502 selfloop transitions, 165 changer transitions 19/1686 dead transitions. [2023-01-28 09:28:30,675 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1686 transitions, 49709 flow [2023-01-28 09:28:30,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 09:28:30,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 09:28:30,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1625 transitions. [2023-01-28 09:28:30,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40302579365079366 [2023-01-28 09:28:30,677 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1625 transitions. [2023-01-28 09:28:30,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1625 transitions. [2023-01-28 09:28:30,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:30,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1625 transitions. [2023-01-28 09:28:30,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 90.27777777777777) internal successors, (1625), 18 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:30,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:30,682 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 224.0) internal successors, (4256), 19 states have internal predecessors, (4256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:30,683 INFO L175 Difference]: Start difference. First operand has 348 places, 1388 transitions, 38612 flow. Second operand 18 states and 1625 transitions. [2023-01-28 09:28:30,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1686 transitions, 49709 flow [2023-01-28 09:28:36,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 1686 transitions, 48944 flow, removed 153 selfloop flow, removed 4 redundant places. [2023-01-28 09:28:36,033 INFO L231 Difference]: Finished difference. Result has 370 places, 1526 transitions, 42758 flow [2023-01-28 09:28:36,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=37965, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=42758, PETRI_PLACES=370, PETRI_TRANSITIONS=1526} [2023-01-28 09:28:36,034 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 351 predicate places. [2023-01-28 09:28:36,034 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1526 transitions, 42758 flow [2023-01-28 09:28:36,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.52380952380952) internal successors, (1796), 21 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:36,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:28:36,034 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:28:36,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 09:28:36,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-01-28 09:28:36,235 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:28:36,235 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:28:36,235 INFO L85 PathProgramCache]: Analyzing trace with hash 351091990, now seen corresponding path program 17 times [2023-01-28 09:28:36,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:28:36,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117195501] [2023-01-28 09:28:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:28:36,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:28:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:28:36,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:36,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:28:36,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117195501] [2023-01-28 09:28:36,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117195501] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:28:36,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535872007] [2023-01-28 09:28:36,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:28:36,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:28:36,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:28:36,485 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:28:36,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 09:28:36,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 09:28:36,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:28:36,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-28 09:28:36,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:28:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:37,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:28:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:28:37,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535872007] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:28:37,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:28:37,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-01-28 09:28:37,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298817062] [2023-01-28 09:28:37,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:28:37,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 09:28:37,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:28:37,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 09:28:37,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-01-28 09:28:37,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:28:37,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1526 transitions, 42758 flow. Second operand has 21 states, 21 states have (on average 85.47619047619048) internal successors, (1795), 21 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:37,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:28:37,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:28:37,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:28:41,207 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 [0] [2023-01-28 09:28:47,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 09:28:49,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 09:28:53,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 09:28:58,680 INFO L130 PetriNetUnfolder]: 8824/16477 cut-off events. [2023-01-28 09:28:58,680 INFO L131 PetriNetUnfolder]: For 664178/664178 co-relation queries the response was YES. [2023-01-28 09:28:58,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179083 conditions, 16477 events. 8824/16477 cut-off events. For 664178/664178 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 138658 event pairs, 848 based on Foata normal form. 26/16503 useless extension candidates. Maximal degree in co-relation 174121. Up to 15009 conditions per place. [2023-01-28 09:28:58,850 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1669 selfloop transitions, 201 changer transitions 32/1902 dead transitions. [2023-01-28 09:28:58,850 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 1902 transitions, 56780 flow [2023-01-28 09:28:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 09:28:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 09:28:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1979 transitions. [2023-01-28 09:28:58,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4015827922077922 [2023-01-28 09:28:58,853 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1979 transitions. [2023-01-28 09:28:58,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1979 transitions. [2023-01-28 09:28:58,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:28:58,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1979 transitions. [2023-01-28 09:28:58,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 89.95454545454545) internal successors, (1979), 22 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:58,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:58,857 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 224.0) internal successors, (5152), 23 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:28:58,857 INFO L175 Difference]: Start difference. First operand has 370 places, 1526 transitions, 42758 flow. Second operand 22 states and 1979 transitions. [2023-01-28 09:28:58,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 1902 transitions, 56780 flow [2023-01-28 09:29:05,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1902 transitions, 56010 flow, removed 377 selfloop flow, removed 5 redundant places. [2023-01-28 09:29:05,167 INFO L231 Difference]: Finished difference. Result has 395 places, 1700 transitions, 48151 flow [2023-01-28 09:29:05,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=41988, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=48151, PETRI_PLACES=395, PETRI_TRANSITIONS=1700} [2023-01-28 09:29:05,168 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 376 predicate places. [2023-01-28 09:29:05,168 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1700 transitions, 48151 flow [2023-01-28 09:29:05,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.47619047619048) internal successors, (1795), 21 states have internal predecessors, (1795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:05,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:29:05,169 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:29:05,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 09:29:05,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 09:29:05,369 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:29:05,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:29:05,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1811320966, now seen corresponding path program 18 times [2023-01-28 09:29:05,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:29:05,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699668506] [2023-01-28 09:29:05,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:29:05,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:29:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:29:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:05,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:29:05,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699668506] [2023-01-28 09:29:05,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699668506] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:29:05,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514549618] [2023-01-28 09:29:05,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:29:05,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:29:05,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:29:05,623 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:29:05,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 09:29:05,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-28 09:29:05,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:29:05,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 09:29:05,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:29:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:29:06,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:29:10,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:29:10,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514549618] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:29:10,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:29:10,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-01-28 09:29:10,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140435443] [2023-01-28 09:29:10,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:29:10,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 09:29:10,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:29:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 09:29:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-01-28 09:29:10,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:29:10,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1700 transitions, 48151 flow. Second operand has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:29:10,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:29:10,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:29:10,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:30:14,384 WARN L222 SmtUtils]: Spent 1.06m on a formula simplification. DAG size of input: 48 DAG size of output: 39 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 09:30:31,592 WARN L222 SmtUtils]: Spent 16.14s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 09:30:49,131 WARN L222 SmtUtils]: Spent 16.16s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 09:30:56,226 INFO L130 PetriNetUnfolder]: 9219/17248 cut-off events. [2023-01-28 09:30:56,226 INFO L131 PetriNetUnfolder]: For 737909/737909 co-relation queries the response was YES. [2023-01-28 09:30:56,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191424 conditions, 17248 events. 9219/17248 cut-off events. For 737909/737909 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 146609 event pairs, 896 based on Foata normal form. 11/17259 useless extension candidates. Maximal degree in co-relation 188169. Up to 16263 conditions per place. [2023-01-28 09:30:56,433 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1775 selfloop transitions, 134 changer transitions 11/1920 dead transitions. [2023-01-28 09:30:56,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 1920 transitions, 57984 flow [2023-01-28 09:30:56,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 09:30:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 09:30:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1702 transitions. [2023-01-28 09:30:56,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.399906015037594 [2023-01-28 09:30:56,435 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1702 transitions. [2023-01-28 09:30:56,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1702 transitions. [2023-01-28 09:30:56,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:30:56,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1702 transitions. [2023-01-28 09:30:56,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 89.57894736842105) internal successors, (1702), 19 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:30:56,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 224.0) internal successors, (4480), 20 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:30:56,439 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 224.0) internal successors, (4480), 20 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:30:56,439 INFO L175 Difference]: Start difference. First operand has 395 places, 1700 transitions, 48151 flow. Second operand 19 states and 1702 transitions. [2023-01-28 09:30:56,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 1920 transitions, 57984 flow [2023-01-28 09:31:04,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1920 transitions, 56528 flow, removed 718 selfloop flow, removed 5 redundant places. [2023-01-28 09:31:04,056 INFO L231 Difference]: Finished difference. Result has 417 places, 1781 transitions, 49882 flow [2023-01-28 09:31:04,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=46695, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=49882, PETRI_PLACES=417, PETRI_TRANSITIONS=1781} [2023-01-28 09:31:04,057 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 398 predicate places. [2023-01-28 09:31:04,057 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 1781 transitions, 49882 flow [2023-01-28 09:31:04,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:31:04,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:31:04,057 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:31:04,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 09:31:04,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:31:04,261 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:31:04,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:31:04,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1559351968, now seen corresponding path program 19 times [2023-01-28 09:31:04,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:31:04,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268685450] [2023-01-28 09:31:04,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:31:04,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:31:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:31:04,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:31:04,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268685450] [2023-01-28 09:31:04,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268685450] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:31:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793753566] [2023-01-28 09:31:04,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:31:04,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:31:04,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:31:04,540 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:31:04,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 09:31:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:31:04,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 09:31:04,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:31:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:05,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:31:05,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:05,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793753566] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:31:05,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:31:05,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-01-28 09:31:05,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611878218] [2023-01-28 09:31:05,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:31:05,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 09:31:05,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:31:05,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 09:31:05,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2023-01-28 09:31:05,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:31:05,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1781 transitions, 49882 flow. Second operand has 22 states, 22 states have (on average 85.31818181818181) internal successors, (1877), 22 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:31:05,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:31:05,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:31:05,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:31:28,801 INFO L130 PetriNetUnfolder]: 10838/20350 cut-off events. [2023-01-28 09:31:28,801 INFO L131 PetriNetUnfolder]: For 920359/920359 co-relation queries the response was YES. [2023-01-28 09:31:28,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230476 conditions, 20350 events. 10838/20350 cut-off events. For 920359/920359 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 178067 event pairs, 840 based on Foata normal form. 12/20362 useless extension candidates. Maximal degree in co-relation 225957. Up to 12372 conditions per place. [2023-01-28 09:31:29,046 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1056 selfloop transitions, 1353 changer transitions 22/2431 dead transitions. [2023-01-28 09:31:29,046 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 2431 transitions, 73333 flow [2023-01-28 09:31:29,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 09:31:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 09:31:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3024 transitions. [2023-01-28 09:31:29,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39705882352941174 [2023-01-28 09:31:29,049 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3024 transitions. [2023-01-28 09:31:29,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3024 transitions. [2023-01-28 09:31:29,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:31:29,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3024 transitions. [2023-01-28 09:31:29,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 88.94117647058823) internal successors, (3024), 34 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:31:29,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:31:29,056 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 224.0) internal successors, (7840), 35 states have internal predecessors, (7840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:31:29,056 INFO L175 Difference]: Start difference. First operand has 417 places, 1781 transitions, 49882 flow. Second operand 34 states and 3024 transitions. [2023-01-28 09:31:29,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 2431 transitions, 73333 flow [2023-01-28 09:31:39,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 2431 transitions, 72148 flow, removed 580 selfloop flow, removed 7 redundant places. [2023-01-28 09:31:39,902 INFO L231 Difference]: Finished difference. Result has 457 places, 2205 transitions, 68911 flow [2023-01-28 09:31:39,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=49085, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=972, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=68911, PETRI_PLACES=457, PETRI_TRANSITIONS=2205} [2023-01-28 09:31:39,903 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 438 predicate places. [2023-01-28 09:31:39,904 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 2205 transitions, 68911 flow [2023-01-28 09:31:39,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 85.31818181818181) internal successors, (1877), 22 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:31:39,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:31:39,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:31:39,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 09:31:40,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 09:31:40,108 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:31:40,108 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:31:40,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1704281468, now seen corresponding path program 20 times [2023-01-28 09:31:40,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:31:40,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090117535] [2023-01-28 09:31:40,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:31:40,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:31:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:31:40,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:40,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:31:40,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090117535] [2023-01-28 09:31:40,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090117535] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:31:40,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834641252] [2023-01-28 09:31:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:31:40,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:31:40,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:31:40,337 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:31:40,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 09:31:40,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:31:40,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:31:40,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 09:31:40,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:31:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:40,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:31:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:31:41,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834641252] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:31:41,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:31:41,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-01-28 09:31:41,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487136084] [2023-01-28 09:31:41,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:31:41,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 09:31:41,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:31:41,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 09:31:41,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-01-28 09:31:41,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:31:41,233 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 2205 transitions, 68911 flow. Second operand has 21 states, 21 states have (on average 85.57142857142857) internal successors, (1797), 21 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:31:41,233 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:31:41,233 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:31:41,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:31:47,820 WARN L222 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 60 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 09:31:54,037 WARN L222 SmtUtils]: Spent 6.11s on a formula simplification. DAG size of input: 43 DAG size of output: 35 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 09:31:56,281 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 [] [2023-01-28 09:31:57,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 09:32:18,668 INFO L130 PetriNetUnfolder]: 12280/23179 cut-off events. [2023-01-28 09:32:18,668 INFO L131 PetriNetUnfolder]: For 1210427/1210427 co-relation queries the response was YES. [2023-01-28 09:32:18,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278669 conditions, 23179 events. 12280/23179 cut-off events. For 1210427/1210427 co-relation queries the response was YES. Maximal size of possible extension queue 1240. Compared 204643 event pairs, 1196 based on Foata normal form. 28/23207 useless extension candidates. Maximal degree in co-relation 277180. Up to 20188 conditions per place. [2023-01-28 09:32:18,963 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 2299 selfloop transitions, 418 changer transitions 33/2750 dead transitions. [2023-01-28 09:32:18,963 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 2750 transitions, 91224 flow [2023-01-28 09:32:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 09:32:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 09:32:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2771 transitions. [2023-01-28 09:32:18,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990495391705069 [2023-01-28 09:32:18,966 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2771 transitions. [2023-01-28 09:32:18,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2771 transitions. [2023-01-28 09:32:18,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:32:18,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2771 transitions. [2023-01-28 09:32:18,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 89.38709677419355) internal successors, (2771), 31 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:32:18,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:32:18,972 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:32:18,972 INFO L175 Difference]: Start difference. First operand has 457 places, 2205 transitions, 68911 flow. Second operand 31 states and 2771 transitions. [2023-01-28 09:32:18,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 2750 transitions, 91224 flow [2023-01-28 09:32:34,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 2750 transitions, 88226 flow, removed 1469 selfloop flow, removed 15 redundant places. [2023-01-28 09:32:34,144 INFO L231 Difference]: Finished difference. Result has 486 places, 2497 transitions, 78171 flow [2023-01-28 09:32:34,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=66147, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1930, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=78171, PETRI_PLACES=486, PETRI_TRANSITIONS=2497} [2023-01-28 09:32:34,146 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 467 predicate places. [2023-01-28 09:32:34,146 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 2497 transitions, 78171 flow [2023-01-28 09:32:34,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.57142857142857) internal successors, (1797), 21 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:32:34,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:32:34,146 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:32:34,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-01-28 09:32:34,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 09:32:34,351 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:32:34,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:32:34,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1960753912, now seen corresponding path program 21 times [2023-01-28 09:32:34,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:32:34,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817807902] [2023-01-28 09:32:34,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:32:34,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:32:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:32:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:32:34,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:32:34,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817807902] [2023-01-28 09:32:34,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817807902] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:32:34,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353656097] [2023-01-28 09:32:34,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 09:32:34,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:32:34,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:32:34,605 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:32:34,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 09:32:34,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 09:32:34,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:32:34,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 09:32:34,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:32:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:32:35,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:32:38,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:32:38,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353656097] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:32:38,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:32:38,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-01-28 09:32:38,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70090352] [2023-01-28 09:32:38,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:32:38,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 09:32:38,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:32:38,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 09:32:38,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-01-28 09:32:38,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:32:38,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 2497 transitions, 78171 flow. Second operand has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:32:38,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:32:38,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:32:38,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:33:26,709 WARN L222 SmtUtils]: Spent 46.72s on a formula simplification. DAG size of input: 56 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 09:33:43,595 WARN L222 SmtUtils]: Spent 14.22s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 09:34:06,534 WARN L222 SmtUtils]: Spent 16.10s on a formula simplification that was a NOOP. DAG size: 36 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 09:34:17,734 INFO L130 PetriNetUnfolder]: 12697/23948 cut-off events. [2023-01-28 09:34:17,734 INFO L131 PetriNetUnfolder]: For 1262535/1262535 co-relation queries the response was YES. [2023-01-28 09:34:17,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287975 conditions, 23948 events. 12697/23948 cut-off events. For 1262535/1262535 co-relation queries the response was YES. Maximal size of possible extension queue 1277. Compared 212312 event pairs, 1092 based on Foata normal form. 9/23957 useless extension candidates. Maximal degree in co-relation 281827. Up to 16173 conditions per place. [2023-01-28 09:34:18,069 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1333 selfloop transitions, 1389 changer transitions 19/2741 dead transitions. [2023-01-28 09:34:18,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 2741 transitions, 90235 flow [2023-01-28 09:34:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 09:34:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 09:34:18,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2129 transitions. [2023-01-28 09:34:18,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39601934523809523 [2023-01-28 09:34:18,072 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2129 transitions. [2023-01-28 09:34:18,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2129 transitions. [2023-01-28 09:34:18,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:34:18,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2129 transitions. [2023-01-28 09:34:18,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 88.70833333333333) internal successors, (2129), 24 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:34:18,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:34:18,077 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:34:18,077 INFO L175 Difference]: Start difference. First operand has 486 places, 2497 transitions, 78171 flow. Second operand 24 states and 2129 transitions. [2023-01-28 09:34:18,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 2741 transitions, 90235 flow [2023-01-28 09:34:35,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 2741 transitions, 88137 flow, removed 1027 selfloop flow, removed 11 redundant places. [2023-01-28 09:34:35,244 INFO L231 Difference]: Finished difference. Result has 509 places, 2621 transitions, 85062 flow [2023-01-28 09:34:35,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=76073, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=85062, PETRI_PLACES=509, PETRI_TRANSITIONS=2621} [2023-01-28 09:34:35,247 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 490 predicate places. [2023-01-28 09:34:35,247 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 2621 transitions, 85062 flow [2023-01-28 09:34:35,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.42857142857143) internal successors, (1794), 21 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:34:35,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:34:35,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:34:35,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-01-28 09:34:35,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:34:35,452 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:34:35,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:34:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash -155023124, now seen corresponding path program 22 times [2023-01-28 09:34:35,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:34:35,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200532983] [2023-01-28 09:34:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:34:35,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:34:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:34:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:34:35,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:34:35,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200532983] [2023-01-28 09:34:35,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200532983] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:34:35,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51317906] [2023-01-28 09:34:35,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 09:34:35,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:34:35,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:34:35,698 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:34:35,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 09:34:35,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 09:34:35,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:34:35,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 09:34:35,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:34:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:34:36,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:34:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:34:36,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51317906] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:34:36,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:34:36,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-01-28 09:34:36,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135639365] [2023-01-28 09:34:36,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:34:36,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 09:34:36,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:34:36,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 09:34:36,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-01-28 09:34:36,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:34:36,885 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 2621 transitions, 85062 flow. Second operand has 22 states, 22 states have (on average 85.27272727272727) internal successors, (1876), 22 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:34:36,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:34:36,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:34:36,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:34:43,679 WARN L222 SmtUtils]: Spent 5.36s on a formula simplification. DAG size of input: 50 DAG size of output: 31 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 09:34:47,385 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 [0] [2023-01-28 09:35:11,114 INFO L130 PetriNetUnfolder]: 13239/24967 cut-off events. [2023-01-28 09:35:11,114 INFO L131 PetriNetUnfolder]: For 1391433/1391433 co-relation queries the response was YES. [2023-01-28 09:35:11,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306542 conditions, 24967 events. 13239/24967 cut-off events. For 1391433/1391433 co-relation queries the response was YES. Maximal size of possible extension queue 1350. Compared 223293 event pairs, 1182 based on Foata normal form. 13/24980 useless extension candidates. Maximal degree in co-relation 305390. Up to 12479 conditions per place. [2023-01-28 09:35:11,482 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1547 selfloop transitions, 1327 changer transitions 23/2897 dead transitions. [2023-01-28 09:35:11,482 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 2897 transitions, 99204 flow [2023-01-28 09:35:11,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 09:35:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 09:35:11,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2035 transitions. [2023-01-28 09:35:11,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39499223602484473 [2023-01-28 09:35:11,484 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2035 transitions. [2023-01-28 09:35:11,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2035 transitions. [2023-01-28 09:35:11,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:35:11,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2035 transitions. [2023-01-28 09:35:11,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 88.47826086956522) internal successors, (2035), 23 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:35:11,489 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:35:11,489 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:35:11,489 INFO L175 Difference]: Start difference. First operand has 509 places, 2621 transitions, 85062 flow. Second operand 23 states and 2035 transitions. [2023-01-28 09:35:11,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 2897 transitions, 99204 flow [2023-01-28 09:35:30,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 2897 transitions, 97905 flow, removed 640 selfloop flow, removed 6 redundant places. [2023-01-28 09:35:30,862 INFO L231 Difference]: Finished difference. Result has 536 places, 2779 transitions, 93087 flow [2023-01-28 09:35:30,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=83763, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=93087, PETRI_PLACES=536, PETRI_TRANSITIONS=2779} [2023-01-28 09:35:30,863 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 517 predicate places. [2023-01-28 09:35:30,864 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 2779 transitions, 93087 flow [2023-01-28 09:35:30,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 85.27272727272727) internal successors, (1876), 22 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:35:30,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:35:30,864 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:35:30,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 09:35:31,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:35:31,068 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:35:31,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:35:31,069 INFO L85 PathProgramCache]: Analyzing trace with hash -641647828, now seen corresponding path program 23 times [2023-01-28 09:35:31,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:35:31,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056861063] [2023-01-28 09:35:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:35:31,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:35:31,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:35:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:35:31,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:35:31,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056861063] [2023-01-28 09:35:31,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056861063] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:35:31,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645690436] [2023-01-28 09:35:31,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 09:35:31,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:35:31,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:35:31,368 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:35:31,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 09:35:31,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 09:35:31,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:35:31,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 09:35:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:35:31,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:35:31,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:35:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:35:32,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645690436] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:35:32,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:35:32,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-28 09:35:32,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918618810] [2023-01-28 09:35:32,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:35:32,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 09:35:32,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:35:32,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 09:35:32,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-01-28 09:35:32,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:35:32,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 2779 transitions, 93087 flow. Second operand has 21 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:35:32,241 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:35:32,241 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:35:32,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:35:59,151 INFO L130 PetriNetUnfolder]: 13929/26280 cut-off events. [2023-01-28 09:35:59,151 INFO L131 PetriNetUnfolder]: For 1531752/1531752 co-relation queries the response was YES. [2023-01-28 09:35:59,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328547 conditions, 26280 events. 13929/26280 cut-off events. For 1531752/1531752 co-relation queries the response was YES. Maximal size of possible extension queue 1440. Compared 237443 event pairs, 1242 based on Foata normal form. 8/26288 useless extension candidates. Maximal degree in co-relation 326925. Up to 13071 conditions per place. [2023-01-28 09:35:59,548 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1657 selfloop transitions, 1421 changer transitions 48/3126 dead transitions. [2023-01-28 09:35:59,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 3126 transitions, 109765 flow [2023-01-28 09:35:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 09:35:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 09:35:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2134 transitions. [2023-01-28 09:35:59,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39694940476190477 [2023-01-28 09:35:59,551 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2134 transitions. [2023-01-28 09:35:59,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2134 transitions. [2023-01-28 09:35:59,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:35:59,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2134 transitions. [2023-01-28 09:35:59,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 88.91666666666667) internal successors, (2134), 24 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:35:59,555 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:35:59,555 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:35:59,556 INFO L175 Difference]: Start difference. First operand has 536 places, 2779 transitions, 93087 flow. Second operand 24 states and 2134 transitions. [2023-01-28 09:35:59,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 3126 transitions, 109765 flow [2023-01-28 09:36:22,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 3126 transitions, 107549 flow, removed 1100 selfloop flow, removed 5 redundant places. [2023-01-28 09:36:22,119 INFO L231 Difference]: Finished difference. Result has 565 places, 2983 transitions, 104485 flow [2023-01-28 09:36:22,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=90871, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2779, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=104485, PETRI_PLACES=565, PETRI_TRANSITIONS=2983} [2023-01-28 09:36:22,121 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 546 predicate places. [2023-01-28 09:36:22,121 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 2983 transitions, 104485 flow [2023-01-28 09:36:22,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:36:22,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:36:22,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:36:22,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 09:36:22,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:36:22,322 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:36:22,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:36:22,322 INFO L85 PathProgramCache]: Analyzing trace with hash -428826602, now seen corresponding path program 24 times [2023-01-28 09:36:22,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:36:22,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142617994] [2023-01-28 09:36:22,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:36:22,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:36:22,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:36:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:36:22,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:36:22,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142617994] [2023-01-28 09:36:22,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142617994] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:36:22,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101282376] [2023-01-28 09:36:22,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 09:36:22,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:36:22,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:36:22,632 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:36:22,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 09:36:22,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 09:36:22,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:36:22,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 09:36:22,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:36:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:36:23,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:36:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:36:23,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101282376] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:36:23,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:36:23,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-01-28 09:36:23,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392158806] [2023-01-28 09:36:23,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:36:23,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 09:36:23,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:36:23,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 09:36:23,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2023-01-28 09:36:23,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:36:23,510 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 2983 transitions, 104485 flow. Second operand has 23 states, 23 states have (on average 85.26086956521739) internal successors, (1961), 23 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:36:23,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:36:23,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:36:23,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:36:58,383 INFO L130 PetriNetUnfolder]: 18266/34208 cut-off events. [2023-01-28 09:36:58,384 INFO L131 PetriNetUnfolder]: For 2193524/2193524 co-relation queries the response was YES. [2023-01-28 09:36:58,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457370 conditions, 34208 events. 18266/34208 cut-off events. For 2193524/2193524 co-relation queries the response was YES. Maximal size of possible extension queue 1746. Compared 318062 event pairs, 1357 based on Foata normal form. 10/34218 useless extension candidates. Maximal degree in co-relation 454051. Up to 18393 conditions per place. [2023-01-28 09:36:59,079 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 1983 selfloop transitions, 2229 changer transitions 28/4240 dead transitions. [2023-01-28 09:36:59,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 4240 transitions, 160236 flow [2023-01-28 09:36:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 09:36:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 09:36:59,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2957 transitions. [2023-01-28 09:36:59,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40002705627705626 [2023-01-28 09:36:59,082 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2957 transitions. [2023-01-28 09:36:59,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2957 transitions. [2023-01-28 09:36:59,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:36:59,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2957 transitions. [2023-01-28 09:36:59,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 89.60606060606061) internal successors, (2957), 33 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:36:59,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:36:59,089 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 224.0) internal successors, (7616), 34 states have internal predecessors, (7616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:36:59,089 INFO L175 Difference]: Start difference. First operand has 565 places, 2983 transitions, 104485 flow. Second operand 33 states and 2957 transitions. [2023-01-28 09:36:59,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 4240 transitions, 160236 flow [2023-01-28 09:37:38,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 4240 transitions, 157933 flow, removed 1147 selfloop flow, removed 3 redundant places. [2023-01-28 09:37:38,127 INFO L231 Difference]: Finished difference. Result has 606 places, 3851 transitions, 150300 flow [2023-01-28 09:37:38,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=102618, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=150300, PETRI_PLACES=606, PETRI_TRANSITIONS=3851} [2023-01-28 09:37:38,129 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 587 predicate places. [2023-01-28 09:37:38,129 INFO L495 AbstractCegarLoop]: Abstraction has has 606 places, 3851 transitions, 150300 flow [2023-01-28 09:37:38,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 85.26086956521739) internal successors, (1961), 23 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:37:38,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:37:38,129 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:37:38,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 09:37:38,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:37:38,330 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:37:38,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:37:38,330 INFO L85 PathProgramCache]: Analyzing trace with hash -750093574, now seen corresponding path program 25 times [2023-01-28 09:37:38,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:37:38,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867777568] [2023-01-28 09:37:38,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:37:38,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:37:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:37:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:37:38,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:37:38,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867777568] [2023-01-28 09:37:38,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867777568] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:37:38,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089134501] [2023-01-28 09:37:38,592 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 09:37:38,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:37:38,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:37:38,593 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:37:38,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 09:37:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:37:38,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 09:37:38,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:37:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:37:39,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:37:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:37:39,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089134501] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:37:39,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:37:39,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-28 09:37:39,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077687100] [2023-01-28 09:37:39,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:37:39,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 09:37:39,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:37:39,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 09:37:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-01-28 09:37:39,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:37:39,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 606 places, 3851 transitions, 150300 flow. Second operand has 21 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:37:39,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:37:39,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:37:39,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:38:30,887 INFO L130 PetriNetUnfolder]: 21442/40060 cut-off events. [2023-01-28 09:38:30,887 INFO L131 PetriNetUnfolder]: For 2772716/2772716 co-relation queries the response was YES. [2023-01-28 09:38:31,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557342 conditions, 40060 events. 21442/40060 cut-off events. For 2772716/2772716 co-relation queries the response was YES. Maximal size of possible extension queue 2047. Compared 380766 event pairs, 1703 based on Foata normal form. 12/40072 useless extension candidates. Maximal degree in co-relation 553931. Up to 17246 conditions per place. [2023-01-28 09:38:31,862 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 2375 selfloop transitions, 2472 changer transitions 31/4878 dead transitions. [2023-01-28 09:38:31,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 4878 transitions, 199764 flow [2023-01-28 09:38:31,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 09:38:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 09:38:31,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2404 transitions. [2023-01-28 09:38:31,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3974867724867725 [2023-01-28 09:38:31,865 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2404 transitions. [2023-01-28 09:38:31,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2404 transitions. [2023-01-28 09:38:31,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:38:31,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2404 transitions. [2023-01-28 09:38:31,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 89.03703703703704) internal successors, (2404), 27 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:38:31,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 224.0) internal successors, (6272), 28 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:38:31,870 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 224.0) internal successors, (6272), 28 states have internal predecessors, (6272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:38:31,870 INFO L175 Difference]: Start difference. First operand has 606 places, 3851 transitions, 150300 flow. Second operand 27 states and 2404 transitions. [2023-01-28 09:38:31,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 4878 transitions, 199764 flow [2023-01-28 09:39:26,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 630 places, 4878 transitions, 191941 flow, removed 3906 selfloop flow, removed 2 redundant places. [2023-01-28 09:39:26,466 INFO L231 Difference]: Finished difference. Result has 646 places, 4526 transitions, 184561 flow [2023-01-28 09:39:26,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=143119, PETRI_DIFFERENCE_MINUEND_PLACES=604, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1897, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1815, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=184561, PETRI_PLACES=646, PETRI_TRANSITIONS=4526} [2023-01-28 09:39:26,469 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 627 predicate places. [2023-01-28 09:39:26,469 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 4526 transitions, 184561 flow [2023-01-28 09:39:26,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 85.38095238095238) internal successors, (1793), 21 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:39:26,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:39:26,469 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:39:26,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 09:39:26,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-01-28 09:39:26,674 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 09:39:26,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:39:26,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2069199658, now seen corresponding path program 26 times [2023-01-28 09:39:26,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:39:26,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19504655] [2023-01-28 09:39:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:39:26,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:39:26,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:39:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:39:26,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:39:26,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19504655] [2023-01-28 09:39:26,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19504655] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:39:26,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873878323] [2023-01-28 09:39:26,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:39:26,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:39:26,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:39:26,910 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 09:39:26,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 09:39:27,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 09:39:27,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:39:27,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 09:39:27,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:39:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:39:27,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:39:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:39:27,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873878323] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:39:27,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:39:27,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-01-28 09:39:27,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157704011] [2023-01-28 09:39:27,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:39:27,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 09:39:27,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:39:27,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 09:39:27,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-01-28 09:39:27,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 224 [2023-01-28 09:39:27,873 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 4526 transitions, 184561 flow. Second operand has 22 states, 22 states have (on average 85.31818181818181) internal successors, (1877), 22 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:39:27,873 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:39:27,873 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 224 [2023-01-28 09:39:27,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:39:30,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Received shutdown request... [2023-01-28 09:40:07,529 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 09:40:07,529 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 09:40:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 09:40:07,813 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 09:40:07,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-01-28 09:40:08,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:40:08,017 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 83/224 universal loopers) in iteration 35,while PetriNetUnfolder was constructing finite prefix that currently has 324346 conditions, 23750 events (13458/23749 cut-off events. For 1607373/1607373 co-relation queries the response was YES. Maximal size of possible extension queue 2253. Compared 223306 event pairs, 954 based on Foata normal form. 0/25782 useless extension candidates. Maximal degree in co-relation 324000. Up to 15277 conditions per place.). [2023-01-28 09:40:08,018 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 09:40:08,019 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 09:40:08,019 INFO L445 BasicCegarLoop]: Path program histogram: [26, 5, 2, 1, 1] [2023-01-28 09:40:08,021 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 09:40:08,021 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 09:40:08,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 09:40:08 BasicIcfg [2023-01-28 09:40:08,022 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 09:40:08,023 INFO L158 Benchmark]: Toolchain (without parser) took 840876.21ms. Allocated memory was 402.7MB in the beginning and 6.4GB in the end (delta: 6.0GB). Free memory was 361.8MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. [2023-01-28 09:40:08,023 INFO L158 Benchmark]: CDTParser took 0.47ms. Allocated memory is still 255.9MB. Free memory is still 212.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 09:40:08,023 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.85ms. Allocated memory is still 402.7MB. Free memory was 361.8MB in the beginning and 350.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 09:40:08,023 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.61ms. Allocated memory is still 402.7MB. Free memory was 350.8MB in the beginning and 349.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 09:40:08,023 INFO L158 Benchmark]: Boogie Preprocessor took 32.01ms. Allocated memory is still 402.7MB. Free memory was 349.1MB in the beginning and 347.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 09:40:08,023 INFO L158 Benchmark]: RCFGBuilder took 266.25ms. Allocated memory is still 402.7MB. Free memory was 347.8MB in the beginning and 333.8MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-01-28 09:40:08,023 INFO L158 Benchmark]: TraceAbstraction took 840366.90ms. Allocated memory was 402.7MB in the beginning and 6.4GB in the end (delta: 6.0GB). Free memory was 333.1MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. [2023-01-28 09:40:08,024 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47ms. Allocated memory is still 255.9MB. Free memory is still 212.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 175.85ms. Allocated memory is still 402.7MB. Free memory was 361.8MB in the beginning and 350.8MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 30.61ms. Allocated memory is still 402.7MB. Free memory was 350.8MB in the beginning and 349.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.01ms. Allocated memory is still 402.7MB. Free memory was 349.1MB in the beginning and 347.8MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 266.25ms. Allocated memory is still 402.7MB. Free memory was 347.8MB in the beginning and 333.8MB in the end (delta: 14.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 840366.90ms. Allocated memory was 402.7MB in the beginning and 6.4GB in the end (delta: 6.0GB). Free memory was 333.1MB in the beginning and 2.2GB in the end (delta: -1.9GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 107 PlacesBefore, 19 PlacesAfterwards, 109 TransitionsBefore, 15 TransitionsAfterwards, 756 CoEnabledTransitionPairs, 7 FixpointIterations, 63 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 6 ConcurrentYvCompositions, 6 ChoiceCompositions, 105 TotalNumberOfCompositions, 744 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 744, independent: 744, independent conditional: 0, independent unconditional: 744, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 408, independent: 408, independent conditional: 0, independent unconditional: 408, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 744, independent: 336, independent conditional: 0, independent unconditional: 336, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 408, unknown conditional: 0, unknown unconditional: 408] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 83/224 universal loopers) in iteration 35,while PetriNetUnfolder was constructing finite prefix that currently has 324346 conditions, 23750 events (13458/23749 cut-off events. For 1607373/1607373 co-relation queries the response was YES. Maximal size of possible extension queue 2253. Compared 223306 event pairs, 954 based on Foata normal form. 0/25782 useless extension candidates. Maximal degree in co-relation 324000. Up to 15277 conditions per place.). - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 83/224 universal loopers) in iteration 35,while PetriNetUnfolder was constructing finite prefix that currently has 324346 conditions, 23750 events (13458/23749 cut-off events. For 1607373/1607373 co-relation queries the response was YES. Maximal size of possible extension queue 2253. Compared 223306 event pairs, 954 based on Foata normal form. 0/25782 useless extension candidates. Maximal degree in co-relation 324000. Up to 15277 conditions per place.). - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 83/224 universal loopers) in iteration 35,while PetriNetUnfolder was constructing finite prefix that currently has 324346 conditions, 23750 events (13458/23749 cut-off events. For 1607373/1607373 co-relation queries the response was YES. Maximal size of possible extension queue 2253. Compared 223306 event pairs, 954 based on Foata normal form. 0/25782 useless extension candidates. Maximal degree in co-relation 324000. Up to 15277 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 136 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 840.3s, OverallIterations: 35, TraceHistogramMax: 3, PathProgramHistogramMax: 26, EmptinessCheckTime: 0.0s, AutomataDifference: 796.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 8 mSolverCounterUnknown, 2938 SdHoareTripleChecker+Valid, 52.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2938 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 50.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 372 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17955 IncrementalHoareTripleChecker+Invalid, 18335 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 372 mSolverCounterUnsat, 0 mSDtfsCounter, 17955 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1570 GetRequests, 736 SyntacticMatches, 61 SemanticMatches, 773 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5763 ImplicationChecksByTransitivity, 251.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=184561occurred in iteration=34, InterpolantAutomatonStates: 589, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 3.1s SatisfiabilityAnalysisTime, 30.5s InterpolantComputationTime, 1131 NumberOfCodeBlocks, 1125 NumberOfCodeBlocksAsserted, 114 NumberOfCheckSat, 1573 ConstructedInterpolants, 95 QuantifiedInterpolants, 28645 SizeOfPredicates, 150 NumberOfNonLiveVariables, 4084 ConjunctsInSsa, 420 ConjunctsInUnsatCore, 97 InterpolantComputations, 4 PerfectInterpolantSequences, 201/806 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown