/usr/bin/java -Xmx8000000000 -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-SemanticLbe.epf --traceabstraction.use.on-demand.petri.net.difference true --traceabstraction.size.reduction.to.apply.after.petri.net.difference REMOVE_DEAD -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-a802222-m [2022-12-12 23:30:17,025 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-12 23:30:17,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-12 23:30:17,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-12 23:30:17,066 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-12 23:30:17,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-12 23:30:17,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-12 23:30:17,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-12 23:30:17,077 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-12 23:30:17,082 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-12 23:30:17,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-12 23:30:17,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-12 23:30:17,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-12 23:30:17,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-12 23:30:17,086 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-12 23:30:17,087 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-12 23:30:17,087 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-12 23:30:17,088 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-12 23:30:17,089 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-12 23:30:17,090 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-12 23:30:17,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-12 23:30:17,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-12 23:30:17,094 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-12 23:30:17,095 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-12 23:30:17,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-12 23:30:17,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-12 23:30:17,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-12 23:30:17,102 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-12 23:30:17,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-12 23:30:17,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-12 23:30:17,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-12 23:30:17,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-12 23:30:17,104 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-12 23:30:17,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-12 23:30:17,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-12 23:30:17,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-12 23:30:17,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-12 23:30:17,106 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-12 23:30:17,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-12 23:30:17,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-12 23:30:17,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-12 23:30:17,112 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-SemanticLbe.epf [2022-12-12 23:30:17,137 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-12 23:30:17,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-12 23:30:17,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-12 23:30:17,138 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-12 23:30:17,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-12 23:30:17,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-12 23:30:17,140 INFO L138 SettingsManager]: * Use SBE=true [2022-12-12 23:30:17,140 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-12 23:30:17,140 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-12 23:30:17,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-12 23:30:17,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-12 23:30:17,141 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-12 23:30:17,141 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-12 23:30:17,141 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-12 23:30:17,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-12 23:30:17,141 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-12 23:30:17,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-12 23:30:17,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-12 23:30:17,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-12 23:30:17,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-12 23:30:17,141 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-12 23:30:17,141 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-12 23:30:17,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-12 23:30:17,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:30:17,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-12 23:30:17,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-12 23:30:17,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-12 23:30:17,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-12 23:30:17,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-12 23:30:17,142 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-12 23:30:17,142 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Size reduction to apply after Petri net difference -> REMOVE_DEAD [2022-12-12 23:30:17,370 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-12 23:30:17,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-12 23:30:17,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-12 23:30:17,390 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-12 23:30:17,390 INFO L275 PluginConnector]: CDTParser initialized [2022-12-12 23:30:17,391 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2022-12-12 23:30:18,297 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-12 23:30:18,489 INFO L351 CDTParser]: Found 1 translation units. [2022-12-12 23:30:18,489 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c [2022-12-12 23:30:18,512 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc81ad515/e3fb25250b254fb3abec9e83f305e807/FLAGd2bfd26d2 [2022-12-12 23:30:18,526 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc81ad515/e3fb25250b254fb3abec9e83f305e807 [2022-12-12 23:30:18,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-12 23:30:18,530 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-12 23:30:18,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-12 23:30:18,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-12 23:30:18,535 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-12 23:30:18,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@734b7348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18, skipping insertion in model container [2022-12-12 23:30:18,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,541 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-12 23:30:18,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-12 23:30:18,696 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-12-12 23:30:18,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:30:18,713 INFO L203 MainTranslator]: Completed pre-run [2022-12-12 23:30:18,741 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sum-array-hom.wvr.c[2396,2409] [2022-12-12 23:30:18,746 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-12 23:30:18,756 INFO L208 MainTranslator]: Completed translation [2022-12-12 23:30:18,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18 WrapperNode [2022-12-12 23:30:18,758 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-12 23:30:18,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-12 23:30:18,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-12 23:30:18,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-12 23:30:18,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,775 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,796 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 102 [2022-12-12 23:30:18,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-12 23:30:18,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-12 23:30:18,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-12 23:30:18,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-12 23:30:18,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,809 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,819 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,820 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-12 23:30:18,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-12 23:30:18,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-12 23:30:18,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-12 23:30:18,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (1/1) ... [2022-12-12 23:30:18,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-12 23:30:18,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:18,861 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) [2022-12-12 23:30:18,913 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 [2022-12-12 23:30:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-12 23:30:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-12 23:30:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-12 23:30:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-12 23:30:18,928 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-12 23:30:18,928 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-12 23:30:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-12 23:30:18,929 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-12 23:30:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-12 23:30:18,929 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-12 23:30:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-12 23:30:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-12 23:30:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-12 23:30:18,929 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-12 23:30:18,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-12 23:30:18,930 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-12 23:30:18,994 INFO L236 CfgBuilder]: Building ICFG [2022-12-12 23:30:18,995 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-12 23:30:19,249 INFO L277 CfgBuilder]: Performing block encoding [2022-12-12 23:30:19,254 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-12 23:30:19,255 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-12 23:30:19,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:30:19 BoogieIcfgContainer [2022-12-12 23:30:19,256 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-12 23:30:19,258 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-12 23:30:19,258 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-12 23:30:19,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-12 23:30:19,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.12 11:30:18" (1/3) ... [2022-12-12 23:30:19,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b6bef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:30:19, skipping insertion in model container [2022-12-12 23:30:19,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.12 11:30:18" (2/3) ... [2022-12-12 23:30:19,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55b6bef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.12 11:30:19, skipping insertion in model container [2022-12-12 23:30:19,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.12 11:30:19" (3/3) ... [2022-12-12 23:30:19,261 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2022-12-12 23:30:19,277 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-12 23:30:19,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-12 23:30:19,277 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-12 23:30:19,383 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-12 23:30:19,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 146 places, 148 transitions, 320 flow [2022-12-12 23:30:19,510 INFO L130 PetriNetUnfolder]: 12/145 cut-off events. [2022-12-12 23:30:19,511 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:30:19,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 12/145 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 100 event pairs, 0 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2022-12-12 23:30:19,515 INFO L82 GeneralOperation]: Start removeDead. Operand has 146 places, 148 transitions, 320 flow [2022-12-12 23:30:19,522 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 135 transitions, 288 flow [2022-12-12 23:30:19,523 INFO L203 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-12 23:30:19,540 INFO L174 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 135 transitions, 288 flow [2022-12-12 23:30:19,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 135 transitions, 288 flow [2022-12-12 23:30:19,568 INFO L130 PetriNetUnfolder]: 12/135 cut-off events. [2022-12-12 23:30:19,569 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:30:19,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 135 events. 12/135 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 101 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 107. Up to 2 conditions per place. [2022-12-12 23:30:19,571 INFO L222 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 135 transitions, 288 flow [2022-12-12 23:30:19,572 INFO L226 LiptonReduction]: Number of co-enabled transitions 1728 [2022-12-12 23:30:23,566 INFO L241 LiptonReduction]: Total number of compositions: 111 [2022-12-12 23:30:23,577 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-12 23:30:23,581 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;@42a1ab66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-12 23:30:23,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-12 23:30:23,585 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2022-12-12 23:30:23,585 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-12 23:30:23,586 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:23,591 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:23,592 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:23,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:23,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2027454459, now seen corresponding path program 1 times [2022-12-12 23:30:23,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:23,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494901234] [2022-12-12 23:30:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:23,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:23,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:24,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:24,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494901234] [2022-12-12 23:30:24,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494901234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:30:24,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:30:24,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-12 23:30:24,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762100757] [2022-12-12 23:30:24,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:30:24,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-12 23:30:24,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:24,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-12 23:30:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-12 23:30:24,166 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 24 [2022-12-12 23:30:24,167 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:24,167 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:24,167 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 24 [2022-12-12 23:30:24,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:24,270 INFO L130 PetriNetUnfolder]: 360/508 cut-off events. [2022-12-12 23:30:24,270 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-12 23:30:24,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1619 event pairs, 39 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2022-12-12 23:30:24,277 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2022-12-12 23:30:24,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2022-12-12 23:30:24,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-12 23:30:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-12 23:30:24,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2022-12-12 23:30:24,285 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.6527777777777778 [2022-12-12 23:30:24,288 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2022-12-12 23:30:24,288 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 40 transitions, 187 flow [2022-12-12 23:30:24,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 32 places, 39 transitions, 180 flow [2022-12-12 23:30:24,291 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 39 transitions, 180 flow [2022-12-12 23:30:24,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:24,292 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:24,292 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:24,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-12 23:30:24,293 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:24,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:24,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1702965316, now seen corresponding path program 1 times [2022-12-12 23:30:24,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:24,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047731963] [2022-12-12 23:30:24,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:24,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:24,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:24,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047731963] [2022-12-12 23:30:24,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047731963] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:30:24,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:30:24,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:30:24,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092909609] [2022-12-12 23:30:24,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:30:24,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:30:24,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:24,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:30:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:30:24,441 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 23:30:24,441 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 39 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:24,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:24,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 23:30:24,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:24,607 INFO L130 PetriNetUnfolder]: 675/985 cut-off events. [2022-12-12 23:30:24,608 INFO L131 PetriNetUnfolder]: For 248/248 co-relation queries the response was YES. [2022-12-12 23:30:24,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2985 conditions, 985 events. 675/985 cut-off events. For 248/248 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4035 event pairs, 66 based on Foata normal form. 0/667 useless extension candidates. Maximal degree in co-relation 1193. Up to 705 conditions per place. [2022-12-12 23:30:24,613 INFO L137 encePairwiseOnDemand]: 18/24 looper letters, 95 selfloop transitions, 6 changer transitions 6/109 dead transitions. [2022-12-12 23:30:24,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 109 transitions, 726 flow [2022-12-12 23:30:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-12 23:30:24,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-12 23:30:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2022-12-12 23:30:24,614 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2022-12-12 23:30:24,615 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2022-12-12 23:30:24,615 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 109 transitions, 726 flow [2022-12-12 23:30:24,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 103 transitions, 681 flow [2022-12-12 23:30:24,619 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 103 transitions, 681 flow [2022-12-12 23:30:24,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:24,619 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:24,620 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:24,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-12 23:30:24,620 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:24,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:24,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1090128332, now seen corresponding path program 1 times [2022-12-12 23:30:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:24,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365807752] [2022-12-12 23:30:24,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:24,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:24,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:24,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365807752] [2022-12-12 23:30:24,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365807752] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:30:24,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:30:24,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:30:24,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957832828] [2022-12-12 23:30:24,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:30:24,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:30:24,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:24,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:30:24,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:30:24,709 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:30:24,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 103 transitions, 681 flow. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:24,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:24,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:30:24,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:24,818 INFO L130 PetriNetUnfolder]: 621/949 cut-off events. [2022-12-12 23:30:24,819 INFO L131 PetriNetUnfolder]: For 467/467 co-relation queries the response was YES. [2022-12-12 23:30:24,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3649 conditions, 949 events. 621/949 cut-off events. For 467/467 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4030 event pairs, 92 based on Foata normal form. 0/725 useless extension candidates. Maximal degree in co-relation 1649. Up to 565 conditions per place. [2022-12-12 23:30:24,823 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 110 selfloop transitions, 4 changer transitions 12/127 dead transitions. [2022-12-12 23:30:24,823 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 127 transitions, 1089 flow [2022-12-12 23:30:24,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:30:24,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:30:24,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 58 transitions. [2022-12-12 23:30:24,824 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2022-12-12 23:30:24,825 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 11 predicate places. [2022-12-12 23:30:24,825 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 127 transitions, 1089 flow [2022-12-12 23:30:24,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 115 transitions, 981 flow [2022-12-12 23:30:24,830 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 115 transitions, 981 flow [2022-12-12 23:30:24,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:24,831 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:24,831 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:24,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-12 23:30:24,831 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:24,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2141966486, now seen corresponding path program 1 times [2022-12-12 23:30:24,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:24,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509818005] [2022-12-12 23:30:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:24,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:24,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:24,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509818005] [2022-12-12 23:30:24,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509818005] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-12 23:30:24,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-12 23:30:24,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-12 23:30:24,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338178796] [2022-12-12 23:30:24,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:30:24,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:30:24,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:24,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:30:24,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-12 23:30:24,904 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 23:30:24,904 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 115 transitions, 981 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:24,904 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:24,904 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 23:30:24,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:24,995 INFO L130 PetriNetUnfolder]: 482/736 cut-off events. [2022-12-12 23:30:24,995 INFO L131 PetriNetUnfolder]: For 609/621 co-relation queries the response was YES. [2022-12-12 23:30:24,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3305 conditions, 736 events. 482/736 cut-off events. For 609/621 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2634 event pairs, 131 based on Foata normal form. 48/618 useless extension candidates. Maximal degree in co-relation 2159. Up to 584 conditions per place. [2022-12-12 23:30:24,999 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 52 selfloop transitions, 2 changer transitions 34/90 dead transitions. [2022-12-12 23:30:24,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 90 transitions, 924 flow [2022-12-12 23:30:24,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:30:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:30:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 51 transitions. [2022-12-12 23:30:25,000 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.425 [2022-12-12 23:30:25,001 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2022-12-12 23:30:25,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 90 transitions, 924 flow [2022-12-12 23:30:25,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 39 places, 56 transitions, 583 flow [2022-12-12 23:30:25,004 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 56 transitions, 583 flow [2022-12-12 23:30:25,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:25,004 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:25,004 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:25,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-12 23:30:25,005 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:25,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:25,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1594356336, now seen corresponding path program 1 times [2022-12-12 23:30:25,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:25,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356324928] [2022-12-12 23:30:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:25,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:25,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:25,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356324928] [2022-12-12 23:30:25,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356324928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:25,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55620104] [2022-12-12 23:30:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:25,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:25,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:25,084 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) [2022-12-12 23:30:25,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-12 23:30:25,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:25,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:30:25,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:25,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:25,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55620104] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:25,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:30:25,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2022-12-12 23:30:25,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815610215] [2022-12-12 23:30:25,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:30:25,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-12 23:30:25,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:25,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-12 23:30:25,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-12-12 23:30:25,250 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 2 out of 24 [2022-12-12 23:30:25,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 56 transitions, 583 flow. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:25,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:25,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 2 of 24 [2022-12-12 23:30:25,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:25,315 INFO L130 PetriNetUnfolder]: 365/535 cut-off events. [2022-12-12 23:30:25,315 INFO L131 PetriNetUnfolder]: For 767/813 co-relation queries the response was YES. [2022-12-12 23:30:25,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 535 events. 365/535 cut-off events. For 767/813 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1759 event pairs, 61 based on Foata normal form. 6/412 useless extension candidates. Maximal degree in co-relation 2707. Up to 495 conditions per place. [2022-12-12 23:30:25,319 INFO L137 encePairwiseOnDemand]: 19/24 looper letters, 63 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2022-12-12 23:30:25,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 72 transitions, 883 flow [2022-12-12 23:30:25,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-12 23:30:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-12 23:30:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2022-12-12 23:30:25,320 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2022-12-12 23:30:25,320 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2022-12-12 23:30:25,320 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 72 transitions, 883 flow [2022-12-12 23:30:25,323 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 72 transitions, 883 flow [2022-12-12 23:30:25,323 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 72 transitions, 883 flow [2022-12-12 23:30:25,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:25,323 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:25,323 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:25,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:25,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:25,535 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:25,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:25,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1587764516, now seen corresponding path program 1 times [2022-12-12 23:30:25,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:25,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485129985] [2022-12-12 23:30:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:25,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:25,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485129985] [2022-12-12 23:30:25,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485129985] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:25,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773366693] [2022-12-12 23:30:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:25,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:25,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:25,630 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) [2022-12-12 23:30:25,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-12 23:30:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:25,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:30:25,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:25,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:25,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773366693] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:25,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:30:25,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-12 23:30:25,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193524050] [2022-12-12 23:30:25,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:30:25,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:30:25,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:25,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:30:25,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:30:25,837 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:30:25,837 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 72 transitions, 883 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:25,837 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:25,837 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:30:25,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:25,979 INFO L130 PetriNetUnfolder]: 563/813 cut-off events. [2022-12-12 23:30:25,980 INFO L131 PetriNetUnfolder]: For 2028/2123 co-relation queries the response was YES. [2022-12-12 23:30:25,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5348 conditions, 813 events. 563/813 cut-off events. For 2028/2123 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2916 event pairs, 45 based on Foata normal form. 6/606 useless extension candidates. Maximal degree in co-relation 4968. Up to 774 conditions per place. [2022-12-12 23:30:25,985 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 145 selfloop transitions, 23 changer transitions 0/169 dead transitions. [2022-12-12 23:30:25,985 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 169 transitions, 2416 flow [2022-12-12 23:30:25,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:30:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:30:25,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2022-12-12 23:30:25,987 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2022-12-12 23:30:25,987 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2022-12-12 23:30:25,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 169 transitions, 2416 flow [2022-12-12 23:30:25,992 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 169 transitions, 2416 flow [2022-12-12 23:30:25,993 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 169 transitions, 2416 flow [2022-12-12 23:30:25,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:25,993 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:25,993 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:26,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:26,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-12 23:30:26,198 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:26,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:26,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1787865142, now seen corresponding path program 2 times [2022-12-12 23:30:26,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:26,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448728855] [2022-12-12 23:30:26,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:26,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:26,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:26,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448728855] [2022-12-12 23:30:26,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448728855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:26,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374301302] [2022-12-12 23:30:26,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:30:26,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:26,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:26,287 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) [2022-12-12 23:30:26,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-12 23:30:26,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:30:26,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:26,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:30:26,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:26,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:26,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374301302] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:26,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:30:26,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-12 23:30:26,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096535335] [2022-12-12 23:30:26,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:30:26,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:30:26,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:26,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:30:26,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:30:26,538 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:30:26,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 169 transitions, 2416 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:26,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:26,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:30:26,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:26,735 INFO L130 PetriNetUnfolder]: 837/1221 cut-off events. [2022-12-12 23:30:26,735 INFO L131 PetriNetUnfolder]: For 2486/2572 co-relation queries the response was YES. [2022-12-12 23:30:26,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9285 conditions, 1221 events. 837/1221 cut-off events. For 2486/2572 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 4651 event pairs, 42 based on Foata normal form. 4/880 useless extension candidates. Maximal degree in co-relation 8620. Up to 1171 conditions per place. [2022-12-12 23:30:26,748 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 270 selfloop transitions, 37 changer transitions 0/308 dead transitions. [2022-12-12 23:30:26,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 308 transitions, 5025 flow [2022-12-12 23:30:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:30:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:30:26,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 65 transitions. [2022-12-12 23:30:26,756 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2022-12-12 23:30:26,757 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2022-12-12 23:30:26,757 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 308 transitions, 5025 flow [2022-12-12 23:30:26,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 308 transitions, 5025 flow [2022-12-12 23:30:26,767 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 308 transitions, 5025 flow [2022-12-12 23:30:26,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:26,767 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:26,767 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:26,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-12 23:30:26,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:26,973 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:26,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:26,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1385546064, now seen corresponding path program 3 times [2022-12-12 23:30:26,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:26,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364433293] [2022-12-12 23:30:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:26,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:26,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:27,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:27,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364433293] [2022-12-12 23:30:27,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364433293] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:27,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697418477] [2022-12-12 23:30:27,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:30:27,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:27,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:27,097 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) [2022-12-12 23:30:27,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-12 23:30:27,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:30:27,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:27,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:30:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:27,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:27,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697418477] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:27,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:30:27,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2022-12-12 23:30:27,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360887455] [2022-12-12 23:30:27,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:30:27,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:30:27,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:30:27,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:30:27,289 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:30:27,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 308 transitions, 5025 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:27,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:27,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:30:27,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:27,510 INFO L130 PetriNetUnfolder]: 840/1223 cut-off events. [2022-12-12 23:30:27,510 INFO L131 PetriNetUnfolder]: For 3596/3718 co-relation queries the response was YES. [2022-12-12 23:30:27,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10493 conditions, 1223 events. 840/1223 cut-off events. For 3596/3718 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4754 event pairs, 40 based on Foata normal form. 8/892 useless extension candidates. Maximal degree in co-relation 9766. Up to 1173 conditions per place. [2022-12-12 23:30:27,516 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 265 selfloop transitions, 39 changer transitions 0/305 dead transitions. [2022-12-12 23:30:27,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 305 transitions, 5585 flow [2022-12-12 23:30:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:30:27,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:30:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2022-12-12 23:30:27,517 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2022-12-12 23:30:27,519 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 31 predicate places. [2022-12-12 23:30:27,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 305 transitions, 5585 flow [2022-12-12 23:30:27,525 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 305 transitions, 5585 flow [2022-12-12 23:30:27,525 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 305 transitions, 5585 flow [2022-12-12 23:30:27,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:27,525 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:27,525 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:27,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:27,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:27,748 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:27,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1410945294, now seen corresponding path program 4 times [2022-12-12 23:30:27,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:27,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358328964] [2022-12-12 23:30:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:27,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:27,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:27,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:27,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358328964] [2022-12-12 23:30:27,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358328964] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:27,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760157921] [2022-12-12 23:30:27,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:30:27,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:27,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:27,821 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) [2022-12-12 23:30:27,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-12 23:30:27,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:30:27,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:27,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:30:27,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:27,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:27,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760157921] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:27,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:27,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-12-12 23:30:27,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981198986] [2022-12-12 23:30:27,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:27,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-12 23:30:27,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:27,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-12 23:30:27,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-12-12 23:30:27,986 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:30:27,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 305 transitions, 5585 flow. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:27,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:27,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:30:27,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:28,304 INFO L130 PetriNetUnfolder]: 788/1161 cut-off events. [2022-12-12 23:30:28,304 INFO L131 PetriNetUnfolder]: For 3788/3788 co-relation queries the response was YES. [2022-12-12 23:30:28,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10904 conditions, 1161 events. 788/1161 cut-off events. For 3788/3788 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4362 event pairs, 40 based on Foata normal form. 0/858 useless extension candidates. Maximal degree in co-relation 10139. Up to 1091 conditions per place. [2022-12-12 23:30:28,342 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 282 selfloop transitions, 46 changer transitions 0/328 dead transitions. [2022-12-12 23:30:28,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 328 transitions, 6579 flow [2022-12-12 23:30:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:30:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:30:28,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 89 transitions. [2022-12-12 23:30:28,343 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3371212121212121 [2022-12-12 23:30:28,343 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2022-12-12 23:30:28,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 328 transitions, 6579 flow [2022-12-12 23:30:28,352 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 328 transitions, 6579 flow [2022-12-12 23:30:28,352 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 328 transitions, 6579 flow [2022-12-12 23:30:28,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:28,352 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:28,352 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:28,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:28,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:28,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:28,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash -614508594, now seen corresponding path program 5 times [2022-12-12 23:30:28,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:28,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889998997] [2022-12-12 23:30:28,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:28,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:28,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:28,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889998997] [2022-12-12 23:30:28,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889998997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:28,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527616186] [2022-12-12 23:30:28,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:30:28,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:28,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:28,631 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) [2022-12-12 23:30:28,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-12 23:30:28,727 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:30:28,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:28,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-12 23:30:28,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:28,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:28,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:28,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527616186] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:28,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:28,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2022-12-12 23:30:28,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882213984] [2022-12-12 23:30:28,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:28,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-12 23:30:28,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:28,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-12 23:30:28,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-12 23:30:28,794 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:30:28,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 328 transitions, 6579 flow. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:28,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:28,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:30:28,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:29,076 INFO L130 PetriNetUnfolder]: 802/1185 cut-off events. [2022-12-12 23:30:29,076 INFO L131 PetriNetUnfolder]: For 3319/3319 co-relation queries the response was YES. [2022-12-12 23:30:29,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12319 conditions, 1185 events. 802/1185 cut-off events. For 3319/3319 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4491 event pairs, 40 based on Foata normal form. 0/880 useless extension candidates. Maximal degree in co-relation 11478. Up to 1113 conditions per place. [2022-12-12 23:30:29,083 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 293 selfloop transitions, 53 changer transitions 0/346 dead transitions. [2022-12-12 23:30:29,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 346 transitions, 7558 flow [2022-12-12 23:30:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-12 23:30:29,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-12 23:30:29,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 83 transitions. [2022-12-12 23:30:29,084 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3143939393939394 [2022-12-12 23:30:29,085 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 51 predicate places. [2022-12-12 23:30:29,085 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 346 transitions, 7558 flow [2022-12-12 23:30:29,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 346 transitions, 7558 flow [2022-12-12 23:30:29,093 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 346 transitions, 7558 flow [2022-12-12 23:30:29,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:29,093 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:29,093 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:29,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:29,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:29,298 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:29,299 INFO L85 PathProgramCache]: Analyzing trace with hash 262799962, now seen corresponding path program 6 times [2022-12-12 23:30:29,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:29,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211398114] [2022-12-12 23:30:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:29,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:29,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:29,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:29,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211398114] [2022-12-12 23:30:29,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211398114] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:29,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654475862] [2022-12-12 23:30:29,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:30:29,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:29,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:29,367 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) [2022-12-12 23:30:29,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-12 23:30:29,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:30:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:29,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-12 23:30:29,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:29,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:29,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654475862] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:29,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-12 23:30:29,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2022-12-12 23:30:29,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527889741] [2022-12-12 23:30:29,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-12 23:30:29,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-12 23:30:29,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:29,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-12 23:30:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-12-12 23:30:29,579 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:30:29,580 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 346 transitions, 7558 flow. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:29,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:29,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:30:29,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:29,769 INFO L130 PetriNetUnfolder]: 788/1157 cut-off events. [2022-12-12 23:30:29,769 INFO L131 PetriNetUnfolder]: For 3767/3767 co-relation queries the response was YES. [2022-12-12 23:30:29,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13108 conditions, 1157 events. 788/1157 cut-off events. For 3767/3767 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4310 event pairs, 40 based on Foata normal form. 0/864 useless extension candidates. Maximal degree in co-relation 12243. Up to 1087 conditions per place. [2022-12-12 23:30:29,775 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 278 selfloop transitions, 44 changer transitions 0/331 dead transitions. [2022-12-12 23:30:29,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 331 transitions, 7863 flow [2022-12-12 23:30:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:30:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:30:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 63 transitions. [2022-12-12 23:30:29,777 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.375 [2022-12-12 23:30:29,777 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 57 predicate places. [2022-12-12 23:30:29,777 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 331 transitions, 7863 flow [2022-12-12 23:30:29,784 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 87 places, 331 transitions, 7863 flow [2022-12-12 23:30:29,784 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 331 transitions, 7863 flow [2022-12-12 23:30:29,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:29,784 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:29,784 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:29,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:29,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:29,989 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:29,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1153803537, now seen corresponding path program 1 times [2022-12-12 23:30:29,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:29,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625075997] [2022-12-12 23:30:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:29,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:30,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:30,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625075997] [2022-12-12 23:30:30,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625075997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:30,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225520900] [2022-12-12 23:30:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:30,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:30,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:30,812 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) [2022-12-12 23:30:30,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-12 23:30:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:30,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 23:30:30,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:31,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:30:31,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 23:30:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:31,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:31,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:30:31,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-12-12 23:30:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:31,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225520900] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:31,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:31,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8] total 25 [2022-12-12 23:30:31,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617154614] [2022-12-12 23:30:31,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:31,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-12 23:30:31,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:31,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-12 23:30:31,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2022-12-12 23:30:31,690 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:30:31,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 331 transitions, 7863 flow. Second operand has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:31,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:31,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:30:31,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:33,307 INFO L130 PetriNetUnfolder]: 1567/2350 cut-off events. [2022-12-12 23:30:33,307 INFO L131 PetriNetUnfolder]: For 6656/6656 co-relation queries the response was YES. [2022-12-12 23:30:33,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28996 conditions, 2350 events. 1567/2350 cut-off events. For 6656/6656 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10530 event pairs, 14 based on Foata normal form. 2/1770 useless extension candidates. Maximal degree in co-relation 23721. Up to 2238 conditions per place. [2022-12-12 23:30:33,327 INFO L137 encePairwiseOnDemand]: 11/24 looper letters, 537 selfloop transitions, 248 changer transitions 12/803 dead transitions. [2022-12-12 23:30:33,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 803 transitions, 20649 flow [2022-12-12 23:30:33,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-12 23:30:33,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-12 23:30:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 187 transitions. [2022-12-12 23:30:33,329 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.37103174603174605 [2022-12-12 23:30:33,329 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2022-12-12 23:30:33,329 INFO L82 GeneralOperation]: Start removeDead. Operand has 107 places, 803 transitions, 20649 flow [2022-12-12 23:30:33,350 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 791 transitions, 20319 flow [2022-12-12 23:30:33,350 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 791 transitions, 20319 flow [2022-12-12 23:30:33,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:33,350 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:33,350 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:33,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-12 23:30:33,555 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,SelfDestructingSolverStorable11 [2022-12-12 23:30:33,556 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:33,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1274421109, now seen corresponding path program 1 times [2022-12-12 23:30:33,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:33,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794495558] [2022-12-12 23:30:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:34,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:34,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794495558] [2022-12-12 23:30:34,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794495558] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:34,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400979465] [2022-12-12 23:30:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:34,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:34,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:34,082 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) [2022-12-12 23:30:34,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-12 23:30:34,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 23:30:34,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:34,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:30:34,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:30:34,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:30:34,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:30:34,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 23:30:34,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:34,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:34,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400979465] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:34,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:34,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 17 [2022-12-12 23:30:34,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830992085] [2022-12-12 23:30:34,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:34,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 23:30:34,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:34,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 23:30:34,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-12-12 23:30:34,488 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:30:34,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 791 transitions, 20319 flow. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:34,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:34,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:30:34,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:35,256 INFO L130 PetriNetUnfolder]: 2227/3358 cut-off events. [2022-12-12 23:30:35,256 INFO L131 PetriNetUnfolder]: For 7689/7689 co-relation queries the response was YES. [2022-12-12 23:30:35,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45083 conditions, 3358 events. 2227/3358 cut-off events. For 7689/7689 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 16410 event pairs, 22 based on Foata normal form. 2/2520 useless extension candidates. Maximal degree in co-relation 31726. Up to 3246 conditions per place. [2022-12-12 23:30:35,281 INFO L137 encePairwiseOnDemand]: 14/24 looper letters, 845 selfloop transitions, 254 changer transitions 6/1124 dead transitions. [2022-12-12 23:30:35,281 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 1124 transitions, 31324 flow [2022-12-12 23:30:35,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:30:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:30:35,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2022-12-12 23:30:35,282 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2022-12-12 23:30:35,282 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 84 predicate places. [2022-12-12 23:30:35,282 INFO L82 GeneralOperation]: Start removeDead. Operand has 114 places, 1124 transitions, 31324 flow [2022-12-12 23:30:35,309 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 1118 transitions, 31144 flow [2022-12-12 23:30:35,310 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 1118 transitions, 31144 flow [2022-12-12 23:30:35,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:35,310 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:35,310 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:35,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:35,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-12 23:30:35,515 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:35,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:35,516 INFO L85 PathProgramCache]: Analyzing trace with hash 976610431, now seen corresponding path program 2 times [2022-12-12 23:30:35,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:35,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010584676] [2022-12-12 23:30:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:35,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:35,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:36,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:36,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010584676] [2022-12-12 23:30:36,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010584676] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:36,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913324561] [2022-12-12 23:30:36,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:30:36,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:36,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:36,033 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) [2022-12-12 23:30:36,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-12 23:30:36,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:30:36,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-12 23:30:36,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:36,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:30:36,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:30:36,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 23:30:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:36,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:36,434 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:30:36,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 46 [2022-12-12 23:30:36,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-12 23:30:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:36,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913324561] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:36,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:36,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-12-12 23:30:36,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539541451] [2022-12-12 23:30:36,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:36,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 23:30:36,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:36,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 23:30:36,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=405, Unknown=6, NotChecked=0, Total=506 [2022-12-12 23:30:36,594 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:30:36,595 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 1118 transitions, 31144 flow. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:36,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:36,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:30:36,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:37,778 INFO L130 PetriNetUnfolder]: 2621/3948 cut-off events. [2022-12-12 23:30:37,778 INFO L131 PetriNetUnfolder]: For 12602/12602 co-relation queries the response was YES. [2022-12-12 23:30:37,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56868 conditions, 3948 events. 2621/3948 cut-off events. For 12602/12602 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20049 event pairs, 18 based on Foata normal form. 2/2951 useless extension candidates. Maximal degree in co-relation 38198. Up to 3836 conditions per place. [2022-12-12 23:30:37,816 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 985 selfloop transitions, 293 changer transitions 6/1303 dead transitions. [2022-12-12 23:30:37,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 1303 transitions, 38988 flow [2022-12-12 23:30:37,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:30:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:30:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2022-12-12 23:30:37,818 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2022-12-12 23:30:37,818 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2022-12-12 23:30:37,819 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 1303 transitions, 38988 flow [2022-12-12 23:30:37,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 1297 transitions, 38796 flow [2022-12-12 23:30:37,854 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 1297 transitions, 38796 flow [2022-12-12 23:30:37,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:37,854 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:37,854 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:37,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:38,059 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,SelfDestructingSolverStorable13 [2022-12-12 23:30:38,059 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:38,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:38,060 INFO L85 PathProgramCache]: Analyzing trace with hash -2092097545, now seen corresponding path program 2 times [2022-12-12 23:30:38,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:38,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146077930] [2022-12-12 23:30:38,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:38,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:38,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:38,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146077930] [2022-12-12 23:30:38,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146077930] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:38,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706631040] [2022-12-12 23:30:38,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-12 23:30:38,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:38,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:38,948 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) [2022-12-12 23:30:38,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-12 23:30:39,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:30:39,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:39,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 23:30:39,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:39,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:30:39,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:30:39,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:30:39,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 23:30:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:39,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:39,741 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:30:39,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2022-12-12 23:30:39,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-12-12 23:30:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:39,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706631040] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:39,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:39,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 32 [2022-12-12 23:30:39,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51173810] [2022-12-12 23:30:39,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:39,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-12 23:30:39,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:39,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-12 23:30:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=956, Unknown=1, NotChecked=0, Total=1122 [2022-12-12 23:30:39,987 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:30:39,987 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 1297 transitions, 38796 flow. Second operand has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:39,987 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:39,987 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:30:39,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:44,740 INFO L130 PetriNetUnfolder]: 3965/6002 cut-off events. [2022-12-12 23:30:44,741 INFO L131 PetriNetUnfolder]: For 15760/15760 co-relation queries the response was YES. [2022-12-12 23:30:44,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93268 conditions, 6002 events. 3965/6002 cut-off events. For 15760/15760 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 33164 event pairs, 32 based on Foata normal form. 2/4374 useless extension candidates. Maximal degree in co-relation 58393. Up to 5890 conditions per place. [2022-12-12 23:30:44,786 INFO L137 encePairwiseOnDemand]: 10/24 looper letters, 1445 selfloop transitions, 562 changer transitions 30/2037 dead transitions. [2022-12-12 23:30:44,787 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 2037 transitions, 65136 flow [2022-12-12 23:30:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-12-12 23:30:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2022-12-12 23:30:44,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 381 transitions. [2022-12-12 23:30:44,789 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3239795918367347 [2022-12-12 23:30:44,789 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 139 predicate places. [2022-12-12 23:30:44,789 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 2037 transitions, 65136 flow [2022-12-12 23:30:44,844 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 2007 transitions, 64140 flow [2022-12-12 23:30:44,845 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 2007 transitions, 64140 flow [2022-12-12 23:30:44,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:44,845 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:44,845 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:44,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:45,050 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,SelfDestructingSolverStorable14 [2022-12-12 23:30:45,050 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:45,051 INFO L85 PathProgramCache]: Analyzing trace with hash -2135510791, now seen corresponding path program 3 times [2022-12-12 23:30:45,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:45,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871734082] [2022-12-12 23:30:45,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:45,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:45,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:45,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871734082] [2022-12-12 23:30:45,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871734082] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:45,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155450077] [2022-12-12 23:30:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:30:45,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:45,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:45,388 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) [2022-12-12 23:30:45,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-12 23:30:45,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-12 23:30:45,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:45,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-12 23:30:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:45,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 23:30:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:45,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:45,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:30:45,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-12-12 23:30:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:45,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155450077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:45,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:45,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 11 [2022-12-12 23:30:45,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550709275] [2022-12-12 23:30:45,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:45,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-12 23:30:45,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:45,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-12 23:30:45,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-12 23:30:45,699 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:30:45,699 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 2007 transitions, 64140 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:45,699 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:45,699 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:30:45,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:47,953 INFO L130 PetriNetUnfolder]: 4679/7104 cut-off events. [2022-12-12 23:30:47,953 INFO L131 PetriNetUnfolder]: For 22930/22930 co-relation queries the response was YES. [2022-12-12 23:30:47,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117564 conditions, 7104 events. 4679/7104 cut-off events. For 22930/22930 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40873 event pairs, 34 based on Foata normal form. 4/5200 useless extension candidates. Maximal degree in co-relation 72785. Up to 6992 conditions per place. [2022-12-12 23:30:48,033 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 2120 selfloop transitions, 253 changer transitions 12/2410 dead transitions. [2022-12-12 23:30:48,034 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 2410 transitions, 82019 flow [2022-12-12 23:30:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:30:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:30:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2022-12-12 23:30:48,035 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2022-12-12 23:30:48,035 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 145 predicate places. [2022-12-12 23:30:48,035 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 2410 transitions, 82019 flow [2022-12-12 23:30:48,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 2398 transitions, 81587 flow [2022-12-12 23:30:48,115 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 2398 transitions, 81587 flow [2022-12-12 23:30:48,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:48,115 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:48,116 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:48,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-12 23:30:48,319 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,SelfDestructingSolverStorable15 [2022-12-12 23:30:48,319 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:48,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1574709759, now seen corresponding path program 4 times [2022-12-12 23:30:48,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:48,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306118432] [2022-12-12 23:30:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:48,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:48,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:48,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:48,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:48,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306118432] [2022-12-12 23:30:48,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306118432] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:48,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117593660] [2022-12-12 23:30:48,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:30:48,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:48,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:48,653 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) [2022-12-12 23:30:48,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-12 23:30:48,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:30:48,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:48,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 23:30:48,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:48,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:30:48,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:30:48,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:30:48,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:30:48,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 23:30:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:48,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:49,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117593660] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:49,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:49,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 15 [2022-12-12 23:30:49,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078012766] [2022-12-12 23:30:49,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:49,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-12 23:30:49,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:49,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-12 23:30:49,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-12-12 23:30:49,058 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:30:49,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 2398 transitions, 81587 flow. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:49,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:49,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:30:49,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:51,805 INFO L130 PetriNetUnfolder]: 4841/7344 cut-off events. [2022-12-12 23:30:51,805 INFO L131 PetriNetUnfolder]: For 27978/27978 co-relation queries the response was YES. [2022-12-12 23:30:51,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128601 conditions, 7344 events. 4841/7344 cut-off events. For 27978/27978 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 42456 event pairs, 32 based on Foata normal form. 2/5362 useless extension candidates. Maximal degree in co-relation 80975. Up to 7232 conditions per place. [2022-12-12 23:30:51,861 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 2244 selfloop transitions, 185 changer transitions 6/2460 dead transitions. [2022-12-12 23:30:51,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 2460 transitions, 88601 flow [2022-12-12 23:30:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:30:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:30:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2022-12-12 23:30:51,862 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4427083333333333 [2022-12-12 23:30:51,863 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 152 predicate places. [2022-12-12 23:30:51,863 INFO L82 GeneralOperation]: Start removeDead. Operand has 182 places, 2460 transitions, 88601 flow [2022-12-12 23:30:51,935 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 182 places, 2454 transitions, 88373 flow [2022-12-12 23:30:51,936 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 2454 transitions, 88373 flow [2022-12-12 23:30:51,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:51,936 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:51,936 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:51,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:52,141 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,SelfDestructingSolverStorable16 [2022-12-12 23:30:52,141 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:52,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1695655877, now seen corresponding path program 3 times [2022-12-12 23:30:52,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:52,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167889486] [2022-12-12 23:30:52,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:52,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:52,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:52,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:52,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167889486] [2022-12-12 23:30:52,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167889486] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:52,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967075324] [2022-12-12 23:30:52,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-12 23:30:52,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:52,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:52,746 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) [2022-12-12 23:30:52,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-12 23:30:52,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-12 23:30:52,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:52,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-12 23:30:52,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:53,096 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:30:53,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 23:30:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:53,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:53,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:30:53,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-12-12 23:30:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:53,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967075324] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:53,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:53,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 29 [2022-12-12 23:30:53,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634749452] [2022-12-12 23:30:53,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:53,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 23:30:53,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:53,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 23:30:53,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=733, Unknown=0, NotChecked=0, Total=930 [2022-12-12 23:30:53,505 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:30:53,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 2454 transitions, 88373 flow. Second operand has 31 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:53,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:53,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:30:53,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:30:57,524 INFO L130 PetriNetUnfolder]: 4991/7573 cut-off events. [2022-12-12 23:30:57,524 INFO L131 PetriNetUnfolder]: For 29532/29532 co-relation queries the response was YES. [2022-12-12 23:30:57,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140199 conditions, 7573 events. 4991/7573 cut-off events. For 29532/29532 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 44007 event pairs, 35 based on Foata normal form. 1/5522 useless extension candidates. Maximal degree in co-relation 89863. Up to 7461 conditions per place. [2022-12-12 23:30:57,592 INFO L137 encePairwiseOnDemand]: 12/24 looper letters, 2331 selfloop transitions, 221 changer transitions 6/2558 dead transitions. [2022-12-12 23:30:57,592 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 2558 transitions, 97185 flow [2022-12-12 23:30:57,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-12-12 23:30:57,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-12-12 23:30:57,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 170 transitions. [2022-12-12 23:30:57,594 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3079710144927536 [2022-12-12 23:30:57,594 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2022-12-12 23:30:57,594 INFO L82 GeneralOperation]: Start removeDead. Operand has 204 places, 2558 transitions, 97185 flow [2022-12-12 23:30:57,678 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 204 places, 2552 transitions, 96948 flow [2022-12-12 23:30:57,679 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 2552 transitions, 96948 flow [2022-12-12 23:30:57,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:57,679 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:30:57,679 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:30:57,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-12 23:30:57,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:57,885 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:30:57,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:30:57,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2010174847, now seen corresponding path program 4 times [2022-12-12 23:30:57,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:30:57,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615804938] [2022-12-12 23:30:57,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:30:57,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:30:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:30:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:58,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:30:58,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615804938] [2022-12-12 23:30:58,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615804938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:30:58,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195928662] [2022-12-12 23:30:58,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-12 23:30:58,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:30:58,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:30:58,363 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) [2022-12-12 23:30:58,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-12 23:30:58,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-12 23:30:58,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:30:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-12 23:30:58,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:30:58,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:30:58,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:30:58,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:30:58,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:30:58,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-12 23:30:58,794 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:30:58,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-12-12 23:30:58,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:30:58,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:30:59,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:30:59,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195928662] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:30:59,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:30:59,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 7] total 29 [2022-12-12 23:30:59,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553772957] [2022-12-12 23:30:59,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:30:59,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-12 23:30:59,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:30:59,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-12 23:30:59,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2022-12-12 23:30:59,057 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 24 [2022-12-12 23:30:59,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 2552 transitions, 96948 flow. Second operand has 31 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:30:59,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:30:59,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 24 [2022-12-12 23:30:59,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:31:06,985 INFO L130 PetriNetUnfolder]: 6354/9975 cut-off events. [2022-12-12 23:31:06,986 INFO L131 PetriNetUnfolder]: For 36912/36912 co-relation queries the response was YES. [2022-12-12 23:31:06,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194907 conditions, 9975 events. 6354/9975 cut-off events. For 36912/36912 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 64049 event pairs, 15 based on Foata normal form. 3/7276 useless extension candidates. Maximal degree in co-relation 123289. Up to 9863 conditions per place. [2022-12-12 23:31:07,091 INFO L137 encePairwiseOnDemand]: 9/24 looper letters, 2742 selfloop transitions, 1085 changer transitions 67/3894 dead transitions. [2022-12-12 23:31:07,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 3894 transitions, 155812 flow [2022-12-12 23:31:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-12-12 23:31:07,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-12-12 23:31:07,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 260 transitions. [2022-12-12 23:31:07,095 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2022-12-12 23:31:07,095 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 203 predicate places. [2022-12-12 23:31:07,096 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 3894 transitions, 155812 flow [2022-12-12 23:31:07,234 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 232 places, 3827 transitions, 153105 flow [2022-12-12 23:31:07,234 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 3827 transitions, 153105 flow [2022-12-12 23:31:07,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 30 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:31:07,235 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:31:07,235 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:31:07,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-12-12 23:31:07,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:31:07,440 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:31:07,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:31:07,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1772215727, now seen corresponding path program 5 times [2022-12-12 23:31:07,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:31:07,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116447806] [2022-12-12 23:31:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:31:07,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:31:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:31:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:31:08,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:31:08,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116447806] [2022-12-12 23:31:08,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116447806] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:31:08,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010582833] [2022-12-12 23:31:08,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:31:08,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:31:08,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:31:08,091 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) [2022-12-12 23:31:08,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-12 23:31:08,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-12 23:31:08,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:31:08,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-12 23:31:08,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:31:08,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 23:31:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:31:08,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:31:08,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:31:08,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-12-12 23:31:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:31:08,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010582833] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:31:08,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:31:08,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 8] total 22 [2022-12-12 23:31:08,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587322107] [2022-12-12 23:31:08,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:31:08,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-12 23:31:08,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:31:08,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-12 23:31:08,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2022-12-12 23:31:08,838 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:31:08,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 3827 transitions, 153105 flow. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:31:08,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:31:08,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:31:08,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:31:16,431 INFO L130 PetriNetUnfolder]: 6284/9841 cut-off events. [2022-12-12 23:31:16,432 INFO L131 PetriNetUnfolder]: For 40959/40959 co-relation queries the response was YES. [2022-12-12 23:31:16,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201662 conditions, 9841 events. 6284/9841 cut-off events. For 40959/40959 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 62949 event pairs, 16 based on Foata normal form. 1/7302 useless extension candidates. Maximal degree in co-relation 123559. Up to 9729 conditions per place. [2022-12-12 23:31:16,524 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 3208 selfloop transitions, 570 changer transitions 8/3859 dead transitions. [2022-12-12 23:31:16,525 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 3859 transitions, 161957 flow [2022-12-12 23:31:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-12 23:31:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-12 23:31:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 115 transitions. [2022-12-12 23:31:16,526 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.34226190476190477 [2022-12-12 23:31:16,526 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 214 predicate places. [2022-12-12 23:31:16,526 INFO L82 GeneralOperation]: Start removeDead. Operand has 244 places, 3859 transitions, 161957 flow [2022-12-12 23:31:16,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 244 places, 3851 transitions, 161612 flow [2022-12-12 23:31:16,659 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 3851 transitions, 161612 flow [2022-12-12 23:31:16,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:31:16,659 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:31:16,659 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:31:16,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-12 23:31:16,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:31:16,864 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:31:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:31:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1763007933, now seen corresponding path program 5 times [2022-12-12 23:31:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:31:16,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802536191] [2022-12-12 23:31:16,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:31:16,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:31:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:31:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:31:17,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:31:17,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802536191] [2022-12-12 23:31:17,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802536191] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:31:17,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440978027] [2022-12-12 23:31:17,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-12 23:31:17,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:31:17,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:31:17,159 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) [2022-12-12 23:31:17,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-12 23:31:17,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-12-12 23:31:17,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:31:17,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-12 23:31:17,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:31:17,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:31:17,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:31:17,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 23:31:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:31:17,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:31:17,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:31:17,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2022-12-12 23:31:17,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-12-12 23:31:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:31:17,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440978027] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:31:17,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:31:17,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2022-12-12 23:31:17,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446733234] [2022-12-12 23:31:17,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:31:17,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-12 23:31:17,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:31:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-12 23:31:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=350, Unknown=4, NotChecked=0, Total=462 [2022-12-12 23:31:17,622 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:31:17,623 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 3851 transitions, 161612 flow. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:31:17,623 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:31:17,623 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:31:17,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:31:28,521 INFO L130 PetriNetUnfolder]: 6817/10679 cut-off events. [2022-12-12 23:31:28,521 INFO L131 PetriNetUnfolder]: For 53385/53385 co-relation queries the response was YES. [2022-12-12 23:31:28,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 229061 conditions, 10679 events. 6817/10679 cut-off events. For 53385/53385 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 69452 event pairs, 20 based on Foata normal form. 6/7920 useless extension candidates. Maximal degree in co-relation 139732. Up to 10567 conditions per place. [2022-12-12 23:31:28,624 INFO L137 encePairwiseOnDemand]: 17/24 looper letters, 3689 selfloop transitions, 359 changer transitions 21/4127 dead transitions. [2022-12-12 23:31:28,625 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 4127 transitions, 181570 flow [2022-12-12 23:31:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-12 23:31:28,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-12 23:31:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 88 transitions. [2022-12-12 23:31:28,630 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2022-12-12 23:31:28,631 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2022-12-12 23:31:28,631 INFO L82 GeneralOperation]: Start removeDead. Operand has 250 places, 4127 transitions, 181570 flow [2022-12-12 23:31:28,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 250 places, 4106 transitions, 180610 flow [2022-12-12 23:31:28,770 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 4106 transitions, 180610 flow [2022-12-12 23:31:28,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 22 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:31:28,771 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:31:28,771 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:31:28,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-12 23:31:28,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:31:28,976 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:31:28,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:31:28,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1701701221, now seen corresponding path program 6 times [2022-12-12 23:31:28,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:31:28,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467563012] [2022-12-12 23:31:28,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:31:28,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:31:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:31:29,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:31:29,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:31:29,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467563012] [2022-12-12 23:31:29,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467563012] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:31:29,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922021914] [2022-12-12 23:31:29,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:31:29,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:31:29,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:31:29,547 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) [2022-12-12 23:31:29,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-12 23:31:29,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:31:29,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:31:29,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-12 23:31:29,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:31:29,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:31:29,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:31:29,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 23:31:29,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:31:29,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:31:29,875 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_891 (Array Int Int))) (= (mod (+ c_~sum1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_891) c_~A~0.base) (+ c_~A~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) 4294967296) (mod (+ c_~sum3~0 c_~sum2~0) 4294967296))) is different from false [2022-12-12 23:31:29,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:31:29,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 52 [2022-12-12 23:31:29,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-12-12 23:31:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-12-12 23:31:30,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922021914] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:31:30,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:31:30,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-12-12 23:31:30,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943837937] [2022-12-12 23:31:30,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:31:30,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-12 23:31:30,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:31:30,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-12 23:31:30,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=359, Unknown=1, NotChecked=40, Total=506 [2022-12-12 23:31:30,016 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:31:30,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 4106 transitions, 180610 flow. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:31:30,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:31:30,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:31:30,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:31:38,003 INFO L130 PetriNetUnfolder]: 6945/10873 cut-off events. [2022-12-12 23:31:38,003 INFO L131 PetriNetUnfolder]: For 64949/64949 co-relation queries the response was YES. [2022-12-12 23:31:38,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243569 conditions, 10873 events. 6945/10873 cut-off events. For 64949/64949 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 70926 event pairs, 15 based on Foata normal form. 2/8053 useless extension candidates. Maximal degree in co-relation 155297. Up to 10761 conditions per place. [2022-12-12 23:31:38,104 INFO L137 encePairwiseOnDemand]: 16/24 looper letters, 3887 selfloop transitions, 224 changer transitions 8/4177 dead transitions. [2022-12-12 23:31:38,104 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 4177 transitions, 192011 flow [2022-12-12 23:31:38,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:31:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:31:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 85 transitions. [2022-12-12 23:31:38,105 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.4427083333333333 [2022-12-12 23:31:38,105 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 227 predicate places. [2022-12-12 23:31:38,106 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 4177 transitions, 192011 flow [2022-12-12 23:31:38,244 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 4169 transitions, 191631 flow [2022-12-12 23:31:38,244 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 4169 transitions, 191631 flow [2022-12-12 23:31:38,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:31:38,244 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:31:38,244 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:31:38,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-12 23:31:38,449 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 [2022-12-12 23:31:38,449 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:31:38,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:31:38,450 INFO L85 PathProgramCache]: Analyzing trace with hash -236281487, now seen corresponding path program 7 times [2022-12-12 23:31:38,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:31:38,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153785388] [2022-12-12 23:31:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:31:38,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:31:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:31:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:31:38,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:31:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153785388] [2022-12-12 23:31:38,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153785388] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:31:38,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978867767] [2022-12-12 23:31:38,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-12 23:31:38,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:31:38,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:31:38,924 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) [2022-12-12 23:31:38,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-12 23:31:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:31:39,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-12 23:31:39,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:31:39,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:31:39,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:31:39,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:31:39,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:31:39,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-12 23:31:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:31:39,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:31:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-12 23:31:39,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978867767] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-12 23:31:39,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-12 23:31:39,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 4] total 17 [2022-12-12 23:31:39,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251292244] [2022-12-12 23:31:39,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-12 23:31:39,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-12 23:31:39,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-12 23:31:39,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-12 23:31:39,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-12-12 23:31:39,310 INFO L481 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 24 [2022-12-12 23:31:39,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 4169 transitions, 191631 flow. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:31:39,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-12 23:31:39,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 24 [2022-12-12 23:31:39,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-12 23:31:48,018 INFO L130 PetriNetUnfolder]: 7229/11341 cut-off events. [2022-12-12 23:31:48,019 INFO L131 PetriNetUnfolder]: For 77995/77995 co-relation queries the response was YES. [2022-12-12 23:31:48,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264989 conditions, 11341 events. 7229/11341 cut-off events. For 77995/77995 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 74626 event pairs, 26 based on Foata normal form. 8/8379 useless extension candidates. Maximal degree in co-relation 162926. Up to 11229 conditions per place. [2022-12-12 23:31:48,125 INFO L137 encePairwiseOnDemand]: 15/24 looper letters, 3905 selfloop transitions, 310 changer transitions 28/4301 dead transitions. [2022-12-12 23:31:48,125 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 4301 transitions, 206303 flow [2022-12-12 23:31:48,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-12 23:31:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-12 23:31:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 87 transitions. [2022-12-12 23:31:48,126 INFO L526 CegarLoopForPetriNet]: DFA transition density 0.453125 [2022-12-12 23:31:48,126 INFO L295 CegarLoopForPetriNet]: 30 programPoint places, 234 predicate places. [2022-12-12 23:31:48,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 264 places, 4301 transitions, 206303 flow [2022-12-12 23:31:48,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 264 places, 4273 transitions, 204911 flow [2022-12-12 23:31:48,273 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 4273 transitions, 204911 flow [2022-12-12 23:31:48,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-12 23:31:48,273 INFO L206 CegarLoopForPetriNet]: Found error trace [2022-12-12 23:31:48,273 INFO L214 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-12 23:31:48,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-12 23:31:48,477 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 [2022-12-12 23:31:48,478 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-12-12 23:31:48,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-12 23:31:48,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1203069127, now seen corresponding path program 6 times [2022-12-12 23:31:48,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-12 23:31:48,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414438325] [2022-12-12 23:31:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-12 23:31:48,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-12 23:31:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-12 23:31:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:31:49,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-12 23:31:49,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414438325] [2022-12-12 23:31:49,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414438325] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-12 23:31:49,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617477122] [2022-12-12 23:31:49,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-12 23:31:49,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-12 23:31:49,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-12 23:31:49,224 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) [2022-12-12 23:31:49,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-12 23:31:49,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-12 23:31:49,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-12 23:31:49,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 46 conjunts are in the unsatisfiable core [2022-12-12 23:31:49,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-12 23:31:49,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-12 23:31:49,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-12 23:31:49,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:31:49,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:31:49,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-12 23:31:49,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-12 23:31:49,780 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:31:49,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2022-12-12 23:31:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-12 23:31:49,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-12 23:31:50,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:31:50,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 49 [2022-12-12 23:31:50,515 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:31:50,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 990 treesize of output 904 [2022-12-12 23:31:50,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 894 treesize of output 798 [2022-12-12 23:31:50,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 798 treesize of output 750 [2022-12-12 23:31:50,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-12 23:31:50,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 750 treesize of output 704 Received shutdown request... [2022-12-12 23:44:46,233 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 [2022-12-12 23:44:46,249 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-12 23:44:46,317 WARN L249 SmtUtils]: Removed 2 from assertion stack [2022-12-12 23:44:46,318 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2022-12-12 23:44:46,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-12 23:44:46,519 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 [2022-12-12 23:44:46,519 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 7ms.. [2022-12-12 23:44:46,521 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-12 23:44:46,521 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2022-12-12 23:44:46,521 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2022-12-12 23:44:46,521 INFO L445 BasicCegarLoop]: Path program histogram: [7, 6, 6, 1, 1, 1, 1, 1] [2022-12-12 23:44:46,523 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-12 23:44:46,523 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-12 23:44:46,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.12 11:44:46 BasicIcfg [2022-12-12 23:44:46,525 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-12 23:44:46,525 INFO L158 Benchmark]: Toolchain (without parser) took 867994.76ms. Allocated memory was 187.7MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 164.2MB in the beginning and 943.0MB in the end (delta: -778.8MB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-12-12 23:44:46,525 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 187.7MB. Free memory was 164.1MB in the beginning and 164.0MB in the end (delta: 162.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-12-12 23:44:46,525 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.22ms. Allocated memory is still 187.7MB. Free memory was 163.7MB in the beginning and 152.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-12-12 23:44:46,525 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.04ms. Allocated memory is still 187.7MB. Free memory was 152.7MB in the beginning and 150.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:44:46,525 INFO L158 Benchmark]: Boogie Preprocessor took 24.23ms. Allocated memory is still 187.7MB. Free memory was 150.6MB in the beginning and 149.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-12 23:44:46,526 INFO L158 Benchmark]: RCFGBuilder took 434.09ms. Allocated memory is still 187.7MB. Free memory was 149.0MB in the beginning and 133.3MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2022-12-12 23:44:46,526 INFO L158 Benchmark]: TraceAbstraction took 867266.89ms. Allocated memory was 187.7MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 132.2MB in the beginning and 943.0MB in the end (delta: -810.8MB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. [2022-12-12 23:44:46,527 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 187.7MB. Free memory was 164.1MB in the beginning and 164.0MB in the end (delta: 162.1kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 225.22ms. Allocated memory is still 187.7MB. Free memory was 163.7MB in the beginning and 152.7MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 38.04ms. Allocated memory is still 187.7MB. Free memory was 152.7MB in the beginning and 150.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.23ms. Allocated memory is still 187.7MB. Free memory was 150.6MB in the beginning and 149.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 434.09ms. Allocated memory is still 187.7MB. Free memory was 149.0MB in the beginning and 133.3MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 867266.89ms. Allocated memory was 187.7MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 132.2MB in the beginning and 943.0MB in the end (delta: -810.8MB). Peak memory consumption was 2.3GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 133 PlacesBefore, 30 PlacesAfterwards, 135 TransitionsBefore, 24 TransitionsAfterwards, 1728 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 67 TrivialYvCompositions, 36 ConcurrentYvCompositions, 8 ChoiceCompositions, 111 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 959, independent: 952, independent conditional: 952, independent unconditional: 0, dependent: 7, dependent conditional: 7, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 959, independent: 952, independent conditional: 0, independent unconditional: 952, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 959, independent: 952, independent conditional: 0, independent unconditional: 952, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 959, independent: 952, independent conditional: 0, independent unconditional: 952, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 959, independent: 952, independent conditional: 0, independent unconditional: 952, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 959, independent: 952, independent conditional: 0, independent unconditional: 952, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 7, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 22, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 959, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 959, unknown conditional: 0, unknown unconditional: 959] , Statistics on independence cache: Total cache size (in pairs): 1530, Positive cache size: 1523, Positive conditional cache size: 0, Positive unconditional cache size: 1523, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 7ms.. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 7ms.. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 7ms.. - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 24 with TraceHistMax 1,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 7 for 7ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 173 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 1.1s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 867.1s, OverallIterations: 24, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 63.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2428 SdHoareTripleChecker+Valid, 7.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2428 mSDsluCounter, 819 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 33 IncrementalHoareTripleChecker+Unchecked, 712 mSDsCounter, 171 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12142 IncrementalHoareTripleChecker+Invalid, 12346 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 171 mSolverCounterUnsat, 107 mSDtfsCounter, 12142 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1155 GetRequests, 617 SyntacticMatches, 32 SemanticMatches, 506 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4435 ImplicationChecksByTransitivity, 10.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=204911occurred in iteration=23, InterpolantAutomatonStates: 265, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 23 MinimizatonAttempts, 8880 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 13.7s InterpolantComputationTime, 943 NumberOfCodeBlocks, 937 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 1312 ConstructedInterpolants, 21 QuantifiedInterpolants, 19220 SizeOfPredicates, 190 NumberOfNonLiveVariables, 4056 ConjunctsInSsa, 480 ConjunctsInUnsatCore, 61 InterpolantComputations, 9 PerfectInterpolantSequences, 46/153 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