/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-05 21:07:20,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-05 21:07:20,610 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-05 21:07:20,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-05 21:07:20,658 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-05 21:07:20,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-05 21:07:20,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-05 21:07:20,666 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-05 21:07:20,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-05 21:07:20,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-05 21:07:20,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-05 21:07:20,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-05 21:07:20,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-05 21:07:20,679 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-05 21:07:20,680 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-05 21:07:20,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-05 21:07:20,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-05 21:07:20,684 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-05 21:07:20,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-05 21:07:20,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-05 21:07:20,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-05 21:07:20,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-05 21:07:20,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-05 21:07:20,694 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-05 21:07:20,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-05 21:07:20,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-05 21:07:20,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-05 21:07:20,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-05 21:07:20,703 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-05 21:07:20,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-05 21:07:20,704 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-05 21:07:20,705 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-05 21:07:20,706 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-05 21:07:20,707 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-05 21:07:20,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-05 21:07:20,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-05 21:07:20,708 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-05 21:07:20,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-05 21:07:20,709 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-05 21:07:20,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-05 21:07:20,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-05 21:07:20,714 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 [2022-12-05 21:07:20,743 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-05 21:07:20,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-05 21:07:20,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-05 21:07:20,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-05 21:07:20,745 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-05 21:07:20,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-05 21:07:20,746 INFO L138 SettingsManager]: * Use SBE=true [2022-12-05 21:07:20,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-05 21:07:20,746 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-05 21:07:20,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-05 21:07:20,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-05 21:07:20,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-05 21:07:20,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-05 21:07:20,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-05 21:07:20,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-05 21:07:20,748 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-05 21:07:20,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-05 21:07:20,748 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-05 21:07:20,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-05 21:07:20,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-05 21:07:20,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-05 21:07:20,749 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-05 21:07:20,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-05 21:07:20,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:07:20,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-05 21:07:20,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-05 21:07:20,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-05 21:07:20,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-05 21:07:20,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-05 21:07:20,750 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-05 21:07:20,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-12-05 21:07:21,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-05 21:07:21,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-05 21:07:21,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-05 21:07:21,060 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-05 21:07:21,060 INFO L275 PluginConnector]: CDTParser initialized [2022-12-05 21:07:21,062 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2022-12-05 21:07:22,188 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-05 21:07:22,403 INFO L351 CDTParser]: Found 1 translation units. [2022-12-05 21:07:22,404 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-word-symm.wvr.c [2022-12-05 21:07:22,409 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a78dff464/a6ca4976663a4c44aed7e32b5ff5c0b3/FLAG4e0adfd70 [2022-12-05 21:07:22,426 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a78dff464/a6ca4976663a4c44aed7e32b5ff5c0b3 [2022-12-05 21:07:22,428 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-05 21:07:22,430 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-05 21:07:22,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-05 21:07:22,433 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-05 21:07:22,435 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-05 21:07:22,436 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,437 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fa7a523 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22, skipping insertion in model container [2022-12-05 21:07:22,437 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-05 21:07:22,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-05 21:07:22,644 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/chl-word-symm.wvr.c[2848,2861] [2022-12-05 21:07:22,659 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:07:22,668 INFO L203 MainTranslator]: Completed pre-run [2022-12-05 21:07:22,704 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/chl-word-symm.wvr.c[2848,2861] [2022-12-05 21:07:22,706 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-05 21:07:22,720 INFO L208 MainTranslator]: Completed translation [2022-12-05 21:07:22,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22 WrapperNode [2022-12-05 21:07:22,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-05 21:07:22,724 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-05 21:07:22,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-05 21:07:22,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-05 21:07:22,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,776 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 9, calls inlined = 11, statements flattened = 128 [2022-12-05 21:07:22,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-05 21:07:22,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-05 21:07:22,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-05 21:07:22,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-05 21:07:22,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,822 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-05 21:07:22,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-05 21:07:22,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-05 21:07:22,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-05 21:07:22,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (1/1) ... [2022-12-05 21:07:22,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-05 21:07:22,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:22,861 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) [2022-12-05 21:07:22,880 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 [2022-12-05 21:07:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-05 21:07:22,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-05 21:07:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-05 21:07:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-05 21:07:22,898 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-05 21:07:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-05 21:07:22,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-05 21:07:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-05 21:07:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-05 21:07:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-05 21:07:22,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-05 21:07:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-05 21:07:22,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-05 21:07:22,900 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-05 21:07:23,008 INFO L236 CfgBuilder]: Building ICFG [2022-12-05 21:07:23,010 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-05 21:07:23,402 INFO L277 CfgBuilder]: Performing block encoding [2022-12-05 21:07:23,412 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-05 21:07:23,412 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-05 21:07:23,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:07:23 BoogieIcfgContainer [2022-12-05 21:07:23,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-05 21:07:23,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-05 21:07:23,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-05 21:07:23,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-05 21:07:23,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:07:22" (1/3) ... [2022-12-05 21:07:23,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee0701c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:07:23, skipping insertion in model container [2022-12-05 21:07:23,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:07:22" (2/3) ... [2022-12-05 21:07:23,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ee0701c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:07:23, skipping insertion in model container [2022-12-05 21:07:23,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:07:23" (3/3) ... [2022-12-05 21:07:23,421 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2022-12-05 21:07:23,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-05 21:07:23,438 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-05 21:07:23,438 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-05 21:07:23,549 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-05 21:07:23,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 207 transitions, 430 flow [2022-12-05 21:07:23,682 INFO L130 PetriNetUnfolder]: 21/205 cut-off events. [2022-12-05 21:07:23,683 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:07:23,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 205 events. 21/205 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 224 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-12-05 21:07:23,694 INFO L82 GeneralOperation]: Start removeDead. Operand has 193 places, 207 transitions, 430 flow [2022-12-05 21:07:23,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 197 transitions, 406 flow [2022-12-05 21:07:23,706 INFO L195 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-05 21:07:23,724 INFO L167 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 183 places, 197 transitions, 406 flow [2022-12-05 21:07:23,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 197 transitions, 406 flow [2022-12-05 21:07:23,786 INFO L130 PetriNetUnfolder]: 21/197 cut-off events. [2022-12-05 21:07:23,789 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:07:23,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 197 events. 21/197 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 223 event pairs, 0 based on Foata normal form. 0/176 useless extension candidates. Maximal degree in co-relation 140. Up to 3 conditions per place. [2022-12-05 21:07:23,794 INFO L184 LiptonReduction]: Starting Lipton reduction on Petri net that has 183 places, 197 transitions, 406 flow [2022-12-05 21:07:23,794 INFO L188 LiptonReduction]: Number of co-enabled transitions 2700 [2022-12-05 21:07:30,664 INFO L203 LiptonReduction]: Total number of compositions: 172 [2022-12-05 21:07:30,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-05 21:07:30,681 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;@89631e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-05 21:07:30,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-05 21:07:30,686 INFO L130 PetriNetUnfolder]: 7/24 cut-off events. [2022-12-05 21:07:30,687 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-05 21:07:30,687 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:30,687 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:30,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:30,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:30,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1678144266, now seen corresponding path program 1 times [2022-12-05 21:07:30,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:30,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709547541] [2022-12-05 21:07:30,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:30,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:31,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:31,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709547541] [2022-12-05 21:07:31,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709547541] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:31,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:07:31,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:07:31,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925861482] [2022-12-05 21:07:31,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:31,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:07:31,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:31,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:07:31,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:07:31,222 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:31,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 25 transitions, 62 flow. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:31,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:31,224 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:31,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:31,359 INFO L130 PetriNetUnfolder]: 98/170 cut-off events. [2022-12-05 21:07:31,360 INFO L131 PetriNetUnfolder]: For 14/14 co-relation queries the response was YES. [2022-12-05 21:07:31,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 170 events. 98/170 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 500 event pairs, 42 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 290. Up to 132 conditions per place. [2022-12-05 21:07:31,365 INFO L137 encePairwiseOnDemand]: 21/25 looper letters, 33 selfloop transitions, 1 changer transitions 5/40 dead transitions. [2022-12-05 21:07:31,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 40 transitions, 182 flow [2022-12-05 21:07:31,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:07:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:07:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 45 transitions. [2022-12-05 21:07:31,376 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.45 [2022-12-05 21:07:31,378 INFO L175 Difference]: Start difference. First operand has 25 places, 25 transitions, 62 flow. Second operand 4 states and 45 transitions. [2022-12-05 21:07:31,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 40 transitions, 182 flow [2022-12-05 21:07:31,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 40 transitions, 166 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 21:07:31,382 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 63 flow [2022-12-05 21:07:31,384 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=63, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2022-12-05 21:07:31,389 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 1 predicate places. [2022-12-05 21:07:31,389 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 63 flow [2022-12-05 21:07:31,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:31,389 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:31,390 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:31,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-05 21:07:31,391 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:31,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:31,392 INFO L85 PathProgramCache]: Analyzing trace with hash -418621268, now seen corresponding path program 2 times [2022-12-05 21:07:31,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:31,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424021231] [2022-12-05 21:07:31,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:31,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:31,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:31,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:31,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424021231] [2022-12-05 21:07:31,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424021231] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:31,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:07:31,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:07:31,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65705605] [2022-12-05 21:07:31,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:31,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-05 21:07:31,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:31,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-05 21:07:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-05 21:07:31,671 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:31,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 63 flow. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:31,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:31,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:31,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:31,808 INFO L130 PetriNetUnfolder]: 105/193 cut-off events. [2022-12-05 21:07:31,810 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-12-05 21:07:31,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431 conditions, 193 events. 105/193 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 627 event pairs, 55 based on Foata normal form. 5/161 useless extension candidates. Maximal degree in co-relation 417. Up to 155 conditions per place. [2022-12-05 21:07:31,820 INFO L137 encePairwiseOnDemand]: 21/25 looper letters, 30 selfloop transitions, 1 changer transitions 7/39 dead transitions. [2022-12-05 21:07:31,820 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 39 transitions, 177 flow [2022-12-05 21:07:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-05 21:07:31,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-05 21:07:31,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 44 transitions. [2022-12-05 21:07:31,822 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.44 [2022-12-05 21:07:31,822 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 63 flow. Second operand 4 states and 44 transitions. [2022-12-05 21:07:31,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 39 transitions, 177 flow [2022-12-05 21:07:31,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 39 transitions, 171 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-05 21:07:31,824 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 69 flow [2022-12-05 21:07:31,825 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=69, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2022-12-05 21:07:31,825 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2022-12-05 21:07:31,825 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 69 flow [2022-12-05 21:07:31,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:31,826 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:31,826 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:31,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-05 21:07:31,826 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:31,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:31,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1770513969, now seen corresponding path program 1 times [2022-12-05 21:07:31,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:31,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065354533] [2022-12-05 21:07:31,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:31,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:31,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:31,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065354533] [2022-12-05 21:07:31,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065354533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:31,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:07:31,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-05 21:07:31,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430135116] [2022-12-05 21:07:31,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:31,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-05 21:07:31,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:31,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-05 21:07:31,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-05 21:07:31,871 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:31,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:31,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:31,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:31,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:31,930 INFO L130 PetriNetUnfolder]: 76/139 cut-off events. [2022-12-05 21:07:31,930 INFO L131 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2022-12-05 21:07:31,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 139 events. 76/139 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 389 event pairs, 20 based on Foata normal form. 14/131 useless extension candidates. Maximal degree in co-relation 311. Up to 114 conditions per place. [2022-12-05 21:07:31,931 INFO L137 encePairwiseOnDemand]: 21/25 looper letters, 25 selfloop transitions, 2 changer transitions 4/32 dead transitions. [2022-12-05 21:07:31,932 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 32 transitions, 151 flow [2022-12-05 21:07:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-05 21:07:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-05 21:07:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 36 transitions. [2022-12-05 21:07:31,933 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.48 [2022-12-05 21:07:31,933 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 69 flow. Second operand 3 states and 36 transitions. [2022-12-05 21:07:31,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 32 transitions, 151 flow [2022-12-05 21:07:31,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 148 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-12-05 21:07:31,935 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 72 flow [2022-12-05 21:07:31,936 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=72, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2022-12-05 21:07:31,937 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2022-12-05 21:07:31,937 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 72 flow [2022-12-05 21:07:31,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:31,937 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:31,937 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:31,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-05 21:07:31,938 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:31,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:31,938 INFO L85 PathProgramCache]: Analyzing trace with hash -918566503, now seen corresponding path program 1 times [2022-12-05 21:07:31,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:31,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736691297] [2022-12-05 21:07:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:31,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:32,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:32,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736691297] [2022-12-05 21:07:32,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736691297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:32,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:07:32,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-05 21:07:32,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692082614] [2022-12-05 21:07:32,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:32,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:07:32,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:32,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:07:32,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-05 21:07:32,383 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:32,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 72 flow. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:32,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:32,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:32,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:32,721 INFO L130 PetriNetUnfolder]: 140/263 cut-off events. [2022-12-05 21:07:32,721 INFO L131 PetriNetUnfolder]: For 111/111 co-relation queries the response was YES. [2022-12-05 21:07:32,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 638 conditions, 263 events. 140/263 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 920 event pairs, 19 based on Foata normal form. 1/227 useless extension candidates. Maximal degree in co-relation 239. Up to 63 conditions per place. [2022-12-05 21:07:32,723 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 59 selfloop transitions, 14 changer transitions 7/81 dead transitions. [2022-12-05 21:07:32,723 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 81 transitions, 384 flow [2022-12-05 21:07:32,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:07:32,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:07:32,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 91 transitions. [2022-12-05 21:07:32,725 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.364 [2022-12-05 21:07:32,725 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 72 flow. Second operand 10 states and 91 transitions. [2022-12-05 21:07:32,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 81 transitions, 384 flow [2022-12-05 21:07:32,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 81 transitions, 362 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-12-05 21:07:32,727 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 178 flow [2022-12-05 21:07:32,728 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=178, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2022-12-05 21:07:32,728 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2022-12-05 21:07:32,728 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 178 flow [2022-12-05 21:07:32,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:32,729 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:32,729 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:32,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-05 21:07:32,729 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:32,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash 486814245, now seen corresponding path program 1 times [2022-12-05 21:07:32,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:32,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152629061] [2022-12-05 21:07:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:32,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:33,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:33,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152629061] [2022-12-05 21:07:33,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152629061] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:33,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530525813] [2022-12-05 21:07:33,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:33,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:33,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:33,098 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) [2022-12-05 21:07:33,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-05 21:07:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:33,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-05 21:07:33,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:33,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:33,564 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 113 treesize of output 78 [2022-12-05 21:07:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:33,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:33,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:33,712 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 117 treesize of output 81 [2022-12-05 21:07:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:34,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530525813] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:34,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:07:34,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2022-12-05 21:07:34,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480115928] [2022-12-05 21:07:34,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:34,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:07:34,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:34,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:07:34,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-12-05 21:07:34,425 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:34,426 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 178 flow. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2022-12-05 21:07:34,426 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:34,426 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:34,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:35,309 INFO L130 PetriNetUnfolder]: 265/535 cut-off events. [2022-12-05 21:07:35,309 INFO L131 PetriNetUnfolder]: For 362/362 co-relation queries the response was YES. [2022-12-05 21:07:35,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1543 conditions, 535 events. 265/535 cut-off events. For 362/362 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2601 event pairs, 25 based on Foata normal form. 15/547 useless extension candidates. Maximal degree in co-relation 1101. Up to 119 conditions per place. [2022-12-05 21:07:35,313 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 87 selfloop transitions, 36 changer transitions 9/133 dead transitions. [2022-12-05 21:07:35,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 133 transitions, 786 flow [2022-12-05 21:07:35,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:07:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:07:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 126 transitions. [2022-12-05 21:07:35,314 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.38769230769230767 [2022-12-05 21:07:35,315 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 178 flow. Second operand 13 states and 126 transitions. [2022-12-05 21:07:35,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 133 transitions, 786 flow [2022-12-05 21:07:35,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 133 transitions, 774 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-12-05 21:07:35,319 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 454 flow [2022-12-05 21:07:35,319 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=454, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2022-12-05 21:07:35,320 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 36 predicate places. [2022-12-05 21:07:35,320 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 454 flow [2022-12-05 21:07:35,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2022-12-05 21:07:35,320 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:35,320 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:35,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:35,525 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 [2022-12-05 21:07:35,526 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:35,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1498489191, now seen corresponding path program 2 times [2022-12-05 21:07:35,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:35,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230381800] [2022-12-05 21:07:35,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:35,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:35,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230381800] [2022-12-05 21:07:35,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230381800] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:35,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446572872] [2022-12-05 21:07:35,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:07:35,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:35,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:35,895 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) [2022-12-05 21:07:35,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-05 21:07:35,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-05 21:07:35,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:35,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-05 21:07:35,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:07:36,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:07:36,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446572872] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:36,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:07:36,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2022-12-05 21:07:36,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294464000] [2022-12-05 21:07:36,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:36,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:07:36,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:07:36,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:07:36,205 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:36,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 454 flow. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:36,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:36,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:36,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:36,427 INFO L130 PetriNetUnfolder]: 243/475 cut-off events. [2022-12-05 21:07:36,427 INFO L131 PetriNetUnfolder]: For 1350/1350 co-relation queries the response was YES. [2022-12-05 21:07:36,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1849 conditions, 475 events. 243/475 cut-off events. For 1350/1350 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2085 event pairs, 29 based on Foata normal form. 1/475 useless extension candidates. Maximal degree in co-relation 1808. Up to 236 conditions per place. [2022-12-05 21:07:36,431 INFO L137 encePairwiseOnDemand]: 15/25 looper letters, 59 selfloop transitions, 27 changer transitions 11/98 dead transitions. [2022-12-05 21:07:36,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 98 transitions, 812 flow [2022-12-05 21:07:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:07:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:07:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2022-12-05 21:07:36,433 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36 [2022-12-05 21:07:36,433 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 454 flow. Second operand 9 states and 81 transitions. [2022-12-05 21:07:36,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 98 transitions, 812 flow [2022-12-05 21:07:36,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 779 flow, removed 16 selfloop flow, removed 2 redundant places. [2022-12-05 21:07:36,445 INFO L231 Difference]: Finished difference. Result has 69 places, 61 transitions, 499 flow [2022-12-05 21:07:36,445 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=499, PETRI_PLACES=69, PETRI_TRANSITIONS=61} [2022-12-05 21:07:36,448 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 44 predicate places. [2022-12-05 21:07:36,448 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 61 transitions, 499 flow [2022-12-05 21:07:36,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:36,448 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:36,448 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:36,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:36,653 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 [2022-12-05 21:07:36,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:36,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1798331024, now seen corresponding path program 1 times [2022-12-05 21:07:36,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:36,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804539178] [2022-12-05 21:07:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:36,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:36,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:37,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:37,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804539178] [2022-12-05 21:07:37,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804539178] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:37,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891713497] [2022-12-05 21:07:37,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:37,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:37,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:37,004 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) [2022-12-05 21:07:37,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-05 21:07:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:37,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-05 21:07:37,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:37,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:37,465 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 113 treesize of output 78 [2022-12-05 21:07:37,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:37,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:37,617 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:37,619 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 117 treesize of output 81 [2022-12-05 21:07:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:38,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891713497] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:38,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:07:38,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 21 [2022-12-05 21:07:38,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879320066] [2022-12-05 21:07:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:38,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:07:38,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:07:38,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:07:38,235 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:38,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 61 transitions, 499 flow. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:38,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:38,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:38,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:39,043 INFO L130 PetriNetUnfolder]: 339/668 cut-off events. [2022-12-05 21:07:39,044 INFO L131 PetriNetUnfolder]: For 2283/2283 co-relation queries the response was YES. [2022-12-05 21:07:39,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2671 conditions, 668 events. 339/668 cut-off events. For 2283/2283 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3325 event pairs, 45 based on Foata normal form. 15/681 useless extension candidates. Maximal degree in co-relation 2612. Up to 169 conditions per place. [2022-12-05 21:07:39,049 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 99 selfloop transitions, 40 changer transitions 7/147 dead transitions. [2022-12-05 21:07:39,050 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 147 transitions, 1230 flow [2022-12-05 21:07:39,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:07:39,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:07:39,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 129 transitions. [2022-12-05 21:07:39,051 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36857142857142855 [2022-12-05 21:07:39,051 INFO L175 Difference]: Start difference. First operand has 69 places, 61 transitions, 499 flow. Second operand 14 states and 129 transitions. [2022-12-05 21:07:39,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 147 transitions, 1230 flow [2022-12-05 21:07:39,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 147 transitions, 1110 flow, removed 26 selfloop flow, removed 8 redundant places. [2022-12-05 21:07:39,063 INFO L231 Difference]: Finished difference. Result has 81 places, 76 transitions, 703 flow [2022-12-05 21:07:39,063 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=703, PETRI_PLACES=81, PETRI_TRANSITIONS=76} [2022-12-05 21:07:39,064 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 56 predicate places. [2022-12-05 21:07:39,064 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 76 transitions, 703 flow [2022-12-05 21:07:39,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:39,064 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:39,064 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:39,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:39,279 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 [2022-12-05 21:07:39,280 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:39,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1425910182, now seen corresponding path program 2 times [2022-12-05 21:07:39,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:39,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099343479] [2022-12-05 21:07:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:39,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:39,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099343479] [2022-12-05 21:07:39,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099343479] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:39,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257264331] [2022-12-05 21:07:39,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:07:39,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:39,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:39,614 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) [2022-12-05 21:07:39,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-05 21:07:39,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-05 21:07:39,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:39,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:07:39,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:39,897 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:39,898 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 113 treesize of output 78 [2022-12-05 21:07:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:07:39,939 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:07:39,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257264331] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:39,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:07:39,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2022-12-05 21:07:39,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507478410] [2022-12-05 21:07:39,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:39,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 21:07:39,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:39,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 21:07:39,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:07:39,941 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:39,941 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 76 transitions, 703 flow. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:39,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:39,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:39,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:40,205 INFO L130 PetriNetUnfolder]: 334/650 cut-off events. [2022-12-05 21:07:40,205 INFO L131 PetriNetUnfolder]: For 3010/3010 co-relation queries the response was YES. [2022-12-05 21:07:40,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2842 conditions, 650 events. 334/650 cut-off events. For 3010/3010 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3158 event pairs, 51 based on Foata normal form. 1/651 useless extension candidates. Maximal degree in co-relation 2781. Up to 338 conditions per place. [2022-12-05 21:07:40,211 INFO L137 encePairwiseOnDemand]: 15/25 looper letters, 82 selfloop transitions, 30 changer transitions 10/123 dead transitions. [2022-12-05 21:07:40,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 123 transitions, 1154 flow [2022-12-05 21:07:40,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:07:40,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:07:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 101 transitions. [2022-12-05 21:07:40,213 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.404 [2022-12-05 21:07:40,213 INFO L175 Difference]: Start difference. First operand has 81 places, 76 transitions, 703 flow. Second operand 10 states and 101 transitions. [2022-12-05 21:07:40,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 123 transitions, 1154 flow [2022-12-05 21:07:40,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 123 transitions, 1124 flow, removed 13 selfloop flow, removed 3 redundant places. [2022-12-05 21:07:40,229 INFO L231 Difference]: Finished difference. Result has 89 places, 76 transitions, 765 flow [2022-12-05 21:07:40,229 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=765, PETRI_PLACES=89, PETRI_TRANSITIONS=76} [2022-12-05 21:07:40,232 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 64 predicate places. [2022-12-05 21:07:40,232 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 76 transitions, 765 flow [2022-12-05 21:07:40,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:40,232 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:40,232 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:40,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:40,443 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 [2022-12-05 21:07:40,444 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:40,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:40,444 INFO L85 PathProgramCache]: Analyzing trace with hash 107431632, now seen corresponding path program 3 times [2022-12-05 21:07:40,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:40,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507120646] [2022-12-05 21:07:40,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:40,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:40,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:40,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:40,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507120646] [2022-12-05 21:07:40,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507120646] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:40,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556796735] [2022-12-05 21:07:40,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:07:40,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:40,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:40,771 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) [2022-12-05 21:07:40,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-05 21:07:40,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-05 21:07:40,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:40,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:07:40,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:41,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:41,013 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 109 treesize of output 74 [2022-12-05 21:07:41,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:07:41,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:07:41,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556796735] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:41,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:07:41,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2022-12-05 21:07:41,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139366003] [2022-12-05 21:07:41,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:41,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 21:07:41,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:41,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 21:07:41,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:07:41,082 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:41,082 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 76 transitions, 765 flow. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:41,082 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:41,083 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:41,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:41,356 INFO L130 PetriNetUnfolder]: 328/634 cut-off events. [2022-12-05 21:07:41,357 INFO L131 PetriNetUnfolder]: For 3133/3133 co-relation queries the response was YES. [2022-12-05 21:07:41,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2885 conditions, 634 events. 328/634 cut-off events. For 3133/3133 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3038 event pairs, 45 based on Foata normal form. 1/635 useless extension candidates. Maximal degree in co-relation 2830. Up to 319 conditions per place. [2022-12-05 21:07:41,362 INFO L137 encePairwiseOnDemand]: 15/25 looper letters, 86 selfloop transitions, 33 changer transitions 4/124 dead transitions. [2022-12-05 21:07:41,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 124 transitions, 1175 flow [2022-12-05 21:07:41,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:07:41,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:07:41,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2022-12-05 21:07:41,364 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3927272727272727 [2022-12-05 21:07:41,364 INFO L175 Difference]: Start difference. First operand has 89 places, 76 transitions, 765 flow. Second operand 11 states and 108 transitions. [2022-12-05 21:07:41,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 124 transitions, 1175 flow [2022-12-05 21:07:41,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 124 transitions, 1069 flow, removed 18 selfloop flow, removed 8 redundant places. [2022-12-05 21:07:41,387 INFO L231 Difference]: Finished difference. Result has 91 places, 75 transitions, 736 flow [2022-12-05 21:07:41,388 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=665, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=736, PETRI_PLACES=91, PETRI_TRANSITIONS=75} [2022-12-05 21:07:41,388 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 66 predicate places. [2022-12-05 21:07:41,388 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 75 transitions, 736 flow [2022-12-05 21:07:41,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:41,388 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:41,389 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:41,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-05 21:07:41,595 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 [2022-12-05 21:07:41,595 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:41,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2031407675, now seen corresponding path program 3 times [2022-12-05 21:07:41,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:41,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011853070] [2022-12-05 21:07:41,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:41,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:41,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:41,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011853070] [2022-12-05 21:07:41,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011853070] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:41,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167438981] [2022-12-05 21:07:41,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:07:41,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:41,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:41,895 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) [2022-12-05 21:07:41,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-05 21:07:41,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-05 21:07:41,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:41,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-05 21:07:41,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:07:42,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:07:42,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167438981] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:42,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:07:42,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2022-12-05 21:07:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746470929] [2022-12-05 21:07:42,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:42,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:07:42,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:42,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:07:42,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:07:42,200 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:42,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 75 transitions, 736 flow. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:42,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:42,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:42,495 INFO L130 PetriNetUnfolder]: 327/626 cut-off events. [2022-12-05 21:07:42,495 INFO L131 PetriNetUnfolder]: For 2560/2560 co-relation queries the response was YES. [2022-12-05 21:07:42,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 626 events. 327/626 cut-off events. For 2560/2560 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2940 event pairs, 45 based on Foata normal form. 1/627 useless extension candidates. Maximal degree in co-relation 2492. Up to 312 conditions per place. [2022-12-05 21:07:42,500 INFO L137 encePairwiseOnDemand]: 15/25 looper letters, 67 selfloop transitions, 36 changer transitions 5/109 dead transitions. [2022-12-05 21:07:42,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 109 transitions, 1077 flow [2022-12-05 21:07:42,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:07:42,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:07:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2022-12-05 21:07:42,502 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36 [2022-12-05 21:07:42,502 INFO L175 Difference]: Start difference. First operand has 91 places, 75 transitions, 736 flow. Second operand 9 states and 81 transitions. [2022-12-05 21:07:42,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 109 transitions, 1077 flow [2022-12-05 21:07:42,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 109 transitions, 983 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-12-05 21:07:42,513 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 709 flow [2022-12-05 21:07:42,513 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=709, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2022-12-05 21:07:42,514 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 63 predicate places. [2022-12-05 21:07:42,514 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 709 flow [2022-12-05 21:07:42,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:42,514 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:42,514 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:42,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:42,720 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 [2022-12-05 21:07:42,720 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:42,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:42,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1162142786, now seen corresponding path program 4 times [2022-12-05 21:07:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:42,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914168809] [2022-12-05 21:07:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:43,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:43,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914168809] [2022-12-05 21:07:43,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914168809] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:43,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888556715] [2022-12-05 21:07:43,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:07:43,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:43,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:43,020 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) [2022-12-05 21:07:43,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-05 21:07:43,101 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:07:43,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:43,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-05 21:07:43,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:43,331 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:43,332 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 113 treesize of output 78 [2022-12-05 21:07:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:43,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:43,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:43,451 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 117 treesize of output 81 [2022-12-05 21:07:44,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:44,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888556715] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:44,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:07:44,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 21 [2022-12-05 21:07:44,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980527030] [2022-12-05 21:07:44,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:44,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:07:44,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:44,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:07:44,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:07:44,096 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:44,096 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 709 flow. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:44,097 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:44,097 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:44,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:44,969 INFO L130 PetriNetUnfolder]: 305/605 cut-off events. [2022-12-05 21:07:44,970 INFO L131 PetriNetUnfolder]: For 2445/2445 co-relation queries the response was YES. [2022-12-05 21:07:44,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 605 events. 305/605 cut-off events. For 2445/2445 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2918 event pairs, 59 based on Foata normal form. 21/624 useless extension candidates. Maximal degree in co-relation 2538. Up to 162 conditions per place. [2022-12-05 21:07:44,975 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 85 selfloop transitions, 38 changer transitions 7/131 dead transitions. [2022-12-05 21:07:44,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1193 flow [2022-12-05 21:07:44,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:07:44,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:07:44,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 115 transitions. [2022-12-05 21:07:44,976 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32857142857142857 [2022-12-05 21:07:44,976 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 709 flow. Second operand 14 states and 115 transitions. [2022-12-05 21:07:44,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1193 flow [2022-12-05 21:07:44,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 131 transitions, 1107 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-12-05 21:07:44,988 INFO L231 Difference]: Finished difference. Result has 99 places, 76 transitions, 797 flow [2022-12-05 21:07:44,989 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=797, PETRI_PLACES=99, PETRI_TRANSITIONS=76} [2022-12-05 21:07:44,989 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 74 predicate places. [2022-12-05 21:07:44,989 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 76 transitions, 797 flow [2022-12-05 21:07:44,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:44,989 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:44,990 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:44,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:45,195 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 [2022-12-05 21:07:45,195 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1089563777, now seen corresponding path program 4 times [2022-12-05 21:07:45,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:45,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547851021] [2022-12-05 21:07:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:45,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:45,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:45,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547851021] [2022-12-05 21:07:45,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547851021] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:45,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013773574] [2022-12-05 21:07:45,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:07:45,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:45,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:45,494 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) [2022-12-05 21:07:45,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-05 21:07:45,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:07:45,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:45,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-05 21:07:45,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:45,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:45,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:45,872 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 117 treesize of output 81 [2022-12-05 21:07:46,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:46,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013773574] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:46,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:07:46,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2022-12-05 21:07:46,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076877687] [2022-12-05 21:07:46,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:46,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:07:46,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:07:46,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-12-05 21:07:46,336 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:46,336 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 76 transitions, 797 flow. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2022-12-05 21:07:46,336 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:46,337 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:46,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:47,245 INFO L130 PetriNetUnfolder]: 281/569 cut-off events. [2022-12-05 21:07:47,245 INFO L131 PetriNetUnfolder]: For 3320/3320 co-relation queries the response was YES. [2022-12-05 21:07:47,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2575 conditions, 569 events. 281/569 cut-off events. For 3320/3320 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2746 event pairs, 57 based on Foata normal form. 17/584 useless extension candidates. Maximal degree in co-relation 2515. Up to 136 conditions per place. [2022-12-05 21:07:47,250 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 84 selfloop transitions, 41 changer transitions 8/134 dead transitions. [2022-12-05 21:07:47,250 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 134 transitions, 1331 flow [2022-12-05 21:07:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:07:47,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:07:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 112 transitions. [2022-12-05 21:07:47,252 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3446153846153846 [2022-12-05 21:07:47,252 INFO L175 Difference]: Start difference. First operand has 99 places, 76 transitions, 797 flow. Second operand 13 states and 112 transitions. [2022-12-05 21:07:47,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 134 transitions, 1331 flow [2022-12-05 21:07:47,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 134 transitions, 1221 flow, removed 35 selfloop flow, removed 10 redundant places. [2022-12-05 21:07:47,265 INFO L231 Difference]: Finished difference. Result has 107 places, 79 transitions, 913 flow [2022-12-05 21:07:47,266 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=913, PETRI_PLACES=107, PETRI_TRANSITIONS=79} [2022-12-05 21:07:47,266 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 82 predicate places. [2022-12-05 21:07:47,266 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 79 transitions, 913 flow [2022-12-05 21:07:47,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2022-12-05 21:07:47,266 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:47,266 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:47,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:47,472 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 [2022-12-05 21:07:47,472 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:47,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1449959066, now seen corresponding path program 5 times [2022-12-05 21:07:47,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:47,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018970585] [2022-12-05 21:07:47,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:47,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:47,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018970585] [2022-12-05 21:07:47,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018970585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:47,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136752808] [2022-12-05 21:07:47,725 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:07:47,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:47,727 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) [2022-12-05 21:07:47,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-05 21:07:47,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:07:47,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:47,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-05 21:07:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:47,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:47,972 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 109 treesize of output 74 [2022-12-05 21:07:48,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:48,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:48,235 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:48,236 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 117 treesize of output 81 [2022-12-05 21:07:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:48,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136752808] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:48,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:07:48,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 22 [2022-12-05 21:07:48,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947436008] [2022-12-05 21:07:48,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:48,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:07:48,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:48,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:07:48,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:07:48,584 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:48,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 79 transitions, 913 flow. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:48,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:48,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:48,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:49,091 INFO L130 PetriNetUnfolder]: 284/569 cut-off events. [2022-12-05 21:07:49,091 INFO L131 PetriNetUnfolder]: For 3214/3214 co-relation queries the response was YES. [2022-12-05 21:07:49,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 569 events. 284/569 cut-off events. For 3214/3214 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2745 event pairs, 57 based on Foata normal form. 1/568 useless extension candidates. Maximal degree in co-relation 2615. Up to 136 conditions per place. [2022-12-05 21:07:49,097 INFO L137 encePairwiseOnDemand]: 15/25 looper letters, 85 selfloop transitions, 37 changer transitions 5/128 dead transitions. [2022-12-05 21:07:49,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 128 transitions, 1365 flow [2022-12-05 21:07:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:07:49,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:07:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 100 transitions. [2022-12-05 21:07:49,100 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3076923076923077 [2022-12-05 21:07:49,100 INFO L175 Difference]: Start difference. First operand has 107 places, 79 transitions, 913 flow. Second operand 13 states and 100 transitions. [2022-12-05 21:07:49,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 128 transitions, 1365 flow [2022-12-05 21:07:49,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 128 transitions, 1287 flow, removed 21 selfloop flow, removed 8 redundant places. [2022-12-05 21:07:49,122 INFO L231 Difference]: Finished difference. Result has 112 places, 82 transitions, 979 flow [2022-12-05 21:07:49,122 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=979, PETRI_PLACES=112, PETRI_TRANSITIONS=82} [2022-12-05 21:07:49,123 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 87 predicate places. [2022-12-05 21:07:49,123 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 82 transitions, 979 flow [2022-12-05 21:07:49,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:49,123 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:49,124 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:49,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:49,329 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 [2022-12-05 21:07:49,329 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:49,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:49,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1467798446, now seen corresponding path program 6 times [2022-12-05 21:07:49,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:49,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81104402] [2022-12-05 21:07:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:49,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:49,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81104402] [2022-12-05 21:07:49,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81104402] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:49,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482054519] [2022-12-05 21:07:49,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:07:49,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:49,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:49,593 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) [2022-12-05 21:07:49,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-05 21:07:49,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-05 21:07:49,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:49,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-05 21:07:49,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:49,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:49,859 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 109 treesize of output 74 [2022-12-05 21:07:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:07:49,934 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:07:49,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482054519] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:49,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:07:49,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2022-12-05 21:07:49,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617952637] [2022-12-05 21:07:49,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:49,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 21:07:49,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:49,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 21:07:49,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-12-05 21:07:49,935 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:49,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 82 transitions, 979 flow. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:49,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:49,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:49,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:50,197 INFO L130 PetriNetUnfolder]: 283/563 cut-off events. [2022-12-05 21:07:50,197 INFO L131 PetriNetUnfolder]: For 3243/3243 co-relation queries the response was YES. [2022-12-05 21:07:50,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2713 conditions, 563 events. 283/563 cut-off events. For 3243/3243 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2673 event pairs, 57 based on Foata normal form. 1/562 useless extension candidates. Maximal degree in co-relation 2660. Up to 265 conditions per place. [2022-12-05 21:07:50,203 INFO L137 encePairwiseOnDemand]: 15/25 looper letters, 91 selfloop transitions, 33 changer transitions 4/129 dead transitions. [2022-12-05 21:07:50,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 129 transitions, 1378 flow [2022-12-05 21:07:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:07:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:07:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2022-12-05 21:07:50,204 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3890909090909091 [2022-12-05 21:07:50,204 INFO L175 Difference]: Start difference. First operand has 112 places, 82 transitions, 979 flow. Second operand 11 states and 107 transitions. [2022-12-05 21:07:50,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 129 transitions, 1378 flow [2022-12-05 21:07:50,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 129 transitions, 1323 flow, removed 6 selfloop flow, removed 8 redundant places. [2022-12-05 21:07:50,221 INFO L231 Difference]: Finished difference. Result has 114 places, 81 transitions, 993 flow [2022-12-05 21:07:50,221 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=993, PETRI_PLACES=114, PETRI_TRANSITIONS=81} [2022-12-05 21:07:50,222 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 89 predicate places. [2022-12-05 21:07:50,222 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 81 transitions, 993 flow [2022-12-05 21:07:50,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:50,222 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:50,223 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:50,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:50,427 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 [2022-12-05 21:07:50,427 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:50,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:50,428 INFO L85 PathProgramCache]: Analyzing trace with hash -94185559, now seen corresponding path program 5 times [2022-12-05 21:07:50,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:50,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135451271] [2022-12-05 21:07:50,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:50,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:50,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:50,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135451271] [2022-12-05 21:07:50,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135451271] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:50,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621770967] [2022-12-05 21:07:50,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:07:50,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:50,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:50,679 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) [2022-12-05 21:07:50,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-05 21:07:50,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:07:50,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:50,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-05 21:07:50,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:50,973 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:50,974 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 109 treesize of output 74 [2022-12-05 21:07:51,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:51,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:51,209 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:51,210 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 117 treesize of output 81 [2022-12-05 21:07:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:51,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621770967] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:51,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:07:51,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2022-12-05 21:07:51,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179722036] [2022-12-05 21:07:51,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:51,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:07:51,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:51,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:07:51,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2022-12-05 21:07:51,748 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:51,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 81 transitions, 993 flow. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2022-12-05 21:07:51,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:51,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:51,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:52,568 INFO L130 PetriNetUnfolder]: 288/575 cut-off events. [2022-12-05 21:07:52,568 INFO L131 PetriNetUnfolder]: For 3117/3117 co-relation queries the response was YES. [2022-12-05 21:07:52,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2835 conditions, 575 events. 288/575 cut-off events. For 3117/3117 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2792 event pairs, 57 based on Foata normal form. 1/572 useless extension candidates. Maximal degree in co-relation 2639. Up to 140 conditions per place. [2022-12-05 21:07:52,574 INFO L137 encePairwiseOnDemand]: 15/25 looper letters, 90 selfloop transitions, 42 changer transitions 5/138 dead transitions. [2022-12-05 21:07:52,574 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 138 transitions, 1462 flow [2022-12-05 21:07:52,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-05 21:07:52,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-05 21:07:52,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 110 transitions. [2022-12-05 21:07:52,575 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3384615384615385 [2022-12-05 21:07:52,575 INFO L175 Difference]: Start difference. First operand has 114 places, 81 transitions, 993 flow. Second operand 13 states and 110 transitions. [2022-12-05 21:07:52,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 138 transitions, 1462 flow [2022-12-05 21:07:52,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 138 transitions, 1359 flow, removed 5 selfloop flow, removed 11 redundant places. [2022-12-05 21:07:52,592 INFO L231 Difference]: Finished difference. Result has 116 places, 82 transitions, 996 flow [2022-12-05 21:07:52,593 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=996, PETRI_PLACES=116, PETRI_TRANSITIONS=82} [2022-12-05 21:07:52,593 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 91 predicate places. [2022-12-05 21:07:52,593 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 82 transitions, 996 flow [2022-12-05 21:07:52,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 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) [2022-12-05 21:07:52,593 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:52,593 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:52,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:52,799 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 [2022-12-05 21:07:52,799 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:52,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1377380057, now seen corresponding path program 6 times [2022-12-05 21:07:52,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:52,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84522237] [2022-12-05 21:07:52,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:52,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:53,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:53,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84522237] [2022-12-05 21:07:53,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84522237] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:53,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924161197] [2022-12-05 21:07:53,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:07:53,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:53,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:53,048 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) [2022-12-05 21:07:53,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-05 21:07:53,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-05 21:07:53,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:53,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-05 21:07:53,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:07:53,362 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:07:53,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924161197] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:53,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:07:53,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 15 [2022-12-05 21:07:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996314361] [2022-12-05 21:07:53,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:53,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:07:53,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:53,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:07:53,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:07:53,364 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:07:53,365 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 82 transitions, 996 flow. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:53,365 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:53,365 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:07:53,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:53,572 INFO L130 PetriNetUnfolder]: 287/570 cut-off events. [2022-12-05 21:07:53,573 INFO L131 PetriNetUnfolder]: For 2925/2925 co-relation queries the response was YES. [2022-12-05 21:07:53,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 570 events. 287/570 cut-off events. For 2925/2925 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2732 event pairs, 57 based on Foata normal form. 1/569 useless extension candidates. Maximal degree in co-relation 2731. Up to 211 conditions per place. [2022-12-05 21:07:53,578 INFO L137 encePairwiseOnDemand]: 15/25 looper letters, 68 selfloop transitions, 40 changer transitions 5/114 dead transitions. [2022-12-05 21:07:53,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 114 transitions, 1331 flow [2022-12-05 21:07:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:07:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:07:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 79 transitions. [2022-12-05 21:07:53,579 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3511111111111111 [2022-12-05 21:07:53,579 INFO L175 Difference]: Start difference. First operand has 116 places, 82 transitions, 996 flow. Second operand 9 states and 79 transitions. [2022-12-05 21:07:53,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 114 transitions, 1331 flow [2022-12-05 21:07:53,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 114 transitions, 1262 flow, removed 1 selfloop flow, removed 9 redundant places. [2022-12-05 21:07:53,594 INFO L231 Difference]: Finished difference. Result has 115 places, 81 transitions, 1000 flow [2022-12-05 21:07:53,595 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=927, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1000, PETRI_PLACES=115, PETRI_TRANSITIONS=81} [2022-12-05 21:07:53,595 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 90 predicate places. [2022-12-05 21:07:53,595 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 81 transitions, 1000 flow [2022-12-05 21:07:53,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 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) [2022-12-05 21:07:53,595 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:53,595 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:53,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:53,800 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 [2022-12-05 21:07:53,801 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:53,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:53,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1598283202, now seen corresponding path program 1 times [2022-12-05 21:07:53,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:53,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958763703] [2022-12-05 21:07:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:53,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:53,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:53,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:53,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958763703] [2022-12-05 21:07:53,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958763703] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:53,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071986470] [2022-12-05 21:07:53,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:53,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:53,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:53,917 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) [2022-12-05 21:07:53,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-05 21:07:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-05 21:07:54,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:54,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:54,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071986470] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:54,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:07:54,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2022-12-05 21:07:54,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616132561] [2022-12-05 21:07:54,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:54,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:07:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:07:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-05 21:07:54,147 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:07:54,148 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 81 transitions, 1000 flow. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:54,148 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:54,148 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:07:54,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:54,416 INFO L130 PetriNetUnfolder]: 359/689 cut-off events. [2022-12-05 21:07:54,417 INFO L131 PetriNetUnfolder]: For 4524/4524 co-relation queries the response was YES. [2022-12-05 21:07:54,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3416 conditions, 689 events. 359/689 cut-off events. For 4524/4524 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3315 event pairs, 60 based on Foata normal form. 8/647 useless extension candidates. Maximal degree in co-relation 3363. Up to 238 conditions per place. [2022-12-05 21:07:54,423 INFO L137 encePairwiseOnDemand]: 16/25 looper letters, 119 selfloop transitions, 15 changer transitions 0/134 dead transitions. [2022-12-05 21:07:54,423 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 134 transitions, 1590 flow [2022-12-05 21:07:54,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:07:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:07:54,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 83 transitions. [2022-12-05 21:07:54,425 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.332 [2022-12-05 21:07:54,425 INFO L175 Difference]: Start difference. First operand has 115 places, 81 transitions, 1000 flow. Second operand 10 states and 83 transitions. [2022-12-05 21:07:54,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 134 transitions, 1590 flow [2022-12-05 21:07:54,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 134 transitions, 1484 flow, removed 4 selfloop flow, removed 9 redundant places. [2022-12-05 21:07:54,439 INFO L231 Difference]: Finished difference. Result has 114 places, 86 transitions, 968 flow [2022-12-05 21:07:54,439 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=968, PETRI_PLACES=114, PETRI_TRANSITIONS=86} [2022-12-05 21:07:54,440 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 89 predicate places. [2022-12-05 21:07:54,440 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 86 transitions, 968 flow [2022-12-05 21:07:54,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:54,440 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:54,440 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:54,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:54,645 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 [2022-12-05 21:07:54,645 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:54,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1878890927, now seen corresponding path program 1 times [2022-12-05 21:07:54,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:54,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116357250] [2022-12-05 21:07:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:54,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:54,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:54,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116357250] [2022-12-05 21:07:54,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116357250] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:54,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:07:54,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-05 21:07:54,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809139964] [2022-12-05 21:07:54,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:54,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:07:54,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:54,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:07:54,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:07:54,717 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:07:54,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 86 transitions, 968 flow. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:54,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:54,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:07:54,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:54,839 INFO L130 PetriNetUnfolder]: 209/423 cut-off events. [2022-12-05 21:07:54,839 INFO L131 PetriNetUnfolder]: For 2492/2492 co-relation queries the response was YES. [2022-12-05 21:07:54,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2248 conditions, 423 events. 209/423 cut-off events. For 2492/2492 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1695 event pairs, 122 based on Foata normal form. 28/451 useless extension candidates. Maximal degree in co-relation 2133. Up to 354 conditions per place. [2022-12-05 21:07:54,843 INFO L137 encePairwiseOnDemand]: 19/25 looper letters, 47 selfloop transitions, 2 changer transitions 35/84 dead transitions. [2022-12-05 21:07:54,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 84 transitions, 946 flow [2022-12-05 21:07:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:07:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:07:54,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 55 transitions. [2022-12-05 21:07:54,844 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3142857142857143 [2022-12-05 21:07:54,844 INFO L175 Difference]: Start difference. First operand has 114 places, 86 transitions, 968 flow. Second operand 7 states and 55 transitions. [2022-12-05 21:07:54,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 84 transitions, 946 flow [2022-12-05 21:07:54,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 84 transitions, 891 flow, removed 9 selfloop flow, removed 9 redundant places. [2022-12-05 21:07:54,856 INFO L231 Difference]: Finished difference. Result has 107 places, 49 transitions, 430 flow [2022-12-05 21:07:54,856 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=430, PETRI_PLACES=107, PETRI_TRANSITIONS=49} [2022-12-05 21:07:54,857 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 82 predicate places. [2022-12-05 21:07:54,857 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 49 transitions, 430 flow [2022-12-05 21:07:54,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:54,857 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:54,857 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:54,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-05 21:07:54,858 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:54,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1586438707, now seen corresponding path program 1 times [2022-12-05 21:07:54,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:54,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686117153] [2022-12-05 21:07:54,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:54,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:07:54,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:54,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686117153] [2022-12-05 21:07:54,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686117153] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:07:54,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:07:54,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-05 21:07:54,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244595998] [2022-12-05 21:07:54,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:54,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-05 21:07:54,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:54,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-05 21:07:54,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-05 21:07:54,923 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:07:54,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 49 transitions, 430 flow. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:54,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:54,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:07:54,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:55,020 INFO L130 PetriNetUnfolder]: 113/221 cut-off events. [2022-12-05 21:07:55,021 INFO L131 PetriNetUnfolder]: For 1286/1286 co-relation queries the response was YES. [2022-12-05 21:07:55,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1185 conditions, 221 events. 113/221 cut-off events. For 1286/1286 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 651 event pairs, 65 based on Foata normal form. 14/235 useless extension candidates. Maximal degree in co-relation 1143. Up to 188 conditions per place. [2022-12-05 21:07:55,022 INFO L137 encePairwiseOnDemand]: 20/25 looper letters, 29 selfloop transitions, 2 changer transitions 16/47 dead transitions. [2022-12-05 21:07:55,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 47 transitions, 449 flow [2022-12-05 21:07:55,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-05 21:07:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-05 21:07:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 38 transitions. [2022-12-05 21:07:55,023 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.304 [2022-12-05 21:07:55,023 INFO L175 Difference]: Start difference. First operand has 107 places, 49 transitions, 430 flow. Second operand 5 states and 38 transitions. [2022-12-05 21:07:55,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 47 transitions, 449 flow [2022-12-05 21:07:55,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 47 transitions, 374 flow, removed 20 selfloop flow, removed 22 redundant places. [2022-12-05 21:07:55,027 INFO L231 Difference]: Finished difference. Result has 63 places, 31 transitions, 180 flow [2022-12-05 21:07:55,027 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=263, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=63, PETRI_TRANSITIONS=31} [2022-12-05 21:07:55,027 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 38 predicate places. [2022-12-05 21:07:55,027 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 31 transitions, 180 flow [2022-12-05 21:07:55,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:55,027 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:55,027 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:55,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-05 21:07:55,028 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:55,028 INFO L85 PathProgramCache]: Analyzing trace with hash -97973799, now seen corresponding path program 1 times [2022-12-05 21:07:55,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:55,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344269274] [2022-12-05 21:07:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:55,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:55,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:55,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344269274] [2022-12-05 21:07:55,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344269274] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:55,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469006649] [2022-12-05 21:07:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:55,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:55,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:55,474 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) [2022-12-05 21:07:55,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-05 21:07:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:55,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-05 21:07:55,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:55,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-05 21:07:55,707 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 [2022-12-05 21:07:55,771 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 [2022-12-05 21:07:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:55,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:56,237 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:56,237 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 48 treesize of output 37 [2022-12-05 21:07:56,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:56,251 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 294 treesize of output 274 [2022-12-05 21:07:56,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:56,263 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 262 treesize of output 239 [2022-12-05 21:07:56,274 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:56,274 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 230 treesize of output 223 [2022-12-05 21:07:56,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:56,329 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 48 treesize of output 37 [2022-12-05 21:07:56,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:56,338 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 598 treesize of output 546 [2022-12-05 21:07:56,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:56,350 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 534 treesize of output 479 [2022-12-05 21:07:56,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:07:56,368 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 470 treesize of output 447 [2022-12-05 21:07:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:56,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469006649] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:56,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:56,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-12-05 21:07:56,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519151352] [2022-12-05 21:07:56,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:56,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-05 21:07:56,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:56,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-05 21:07:56,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=531, Unknown=26, NotChecked=0, Total=702 [2022-12-05 21:07:56,550 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:07:56,550 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 31 transitions, 180 flow. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:56,550 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:56,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:07:56,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:57,116 INFO L130 PetriNetUnfolder]: 274/487 cut-off events. [2022-12-05 21:07:57,117 INFO L131 PetriNetUnfolder]: For 1160/1160 co-relation queries the response was YES. [2022-12-05 21:07:57,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 487 events. 274/487 cut-off events. For 1160/1160 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1917 event pairs, 32 based on Foata normal form. 16/502 useless extension candidates. Maximal degree in co-relation 1975. Up to 156 conditions per place. [2022-12-05 21:07:57,120 INFO L137 encePairwiseOnDemand]: 12/25 looper letters, 70 selfloop transitions, 15 changer transitions 0/85 dead transitions. [2022-12-05 21:07:57,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 628 flow [2022-12-05 21:07:57,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:07:57,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:07:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 76 transitions. [2022-12-05 21:07:57,122 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.27636363636363637 [2022-12-05 21:07:57,122 INFO L175 Difference]: Start difference. First operand has 63 places, 31 transitions, 180 flow. Second operand 11 states and 76 transitions. [2022-12-05 21:07:57,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 628 flow [2022-12-05 21:07:57,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 85 transitions, 546 flow, removed 32 selfloop flow, removed 8 redundant places. [2022-12-05 21:07:57,126 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 236 flow [2022-12-05 21:07:57,126 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=236, PETRI_PLACES=57, PETRI_TRANSITIONS=38} [2022-12-05 21:07:57,126 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 32 predicate places. [2022-12-05 21:07:57,126 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 236 flow [2022-12-05 21:07:57,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:57,126 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:57,127 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:57,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-05 21:07:57,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:57,334 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:57,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1196805033, now seen corresponding path program 2 times [2022-12-05 21:07:57,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:57,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245273684] [2022-12-05 21:07:57,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:57,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:57,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:57,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245273684] [2022-12-05 21:07:57,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245273684] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:57,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262624105] [2022-12-05 21:07:57,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:07:57,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:57,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:57,749 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) [2022-12-05 21:07:57,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-05 21:07:57,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:07:57,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:57,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-05 21:07:57,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:58,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:58,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:58,222 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:07:58,223 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 20 treesize of output 4 [2022-12-05 21:07:58,228 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:07:58,229 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 20 treesize of output 4 [2022-12-05 21:07:58,266 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-05 21:07:58,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-05 21:07:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:58,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262624105] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:07:58,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:07:58,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-12-05 21:07:58,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890487035] [2022-12-05 21:07:58,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:07:58,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-05 21:07:58,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:58,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-05 21:07:58,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:07:58,386 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:07:58,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 38 transitions, 236 flow. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:58,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:58,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:07:58,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:07:58,810 INFO L130 PetriNetUnfolder]: 368/659 cut-off events. [2022-12-05 21:07:58,810 INFO L131 PetriNetUnfolder]: For 1098/1098 co-relation queries the response was YES. [2022-12-05 21:07:58,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2745 conditions, 659 events. 368/659 cut-off events. For 1098/1098 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2810 event pairs, 105 based on Foata normal form. 16/675 useless extension candidates. Maximal degree in co-relation 2713. Up to 362 conditions per place. [2022-12-05 21:07:58,818 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 71 selfloop transitions, 18 changer transitions 0/89 dead transitions. [2022-12-05 21:07:58,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 680 flow [2022-12-05 21:07:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:07:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:07:58,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 71 transitions. [2022-12-05 21:07:58,819 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2581818181818182 [2022-12-05 21:07:58,819 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 236 flow. Second operand 11 states and 71 transitions. [2022-12-05 21:07:58,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 680 flow [2022-12-05 21:07:58,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 89 transitions, 632 flow, removed 12 selfloop flow, removed 9 redundant places. [2022-12-05 21:07:58,824 INFO L231 Difference]: Finished difference. Result has 62 places, 48 transitions, 337 flow [2022-12-05 21:07:58,824 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=337, PETRI_PLACES=62, PETRI_TRANSITIONS=48} [2022-12-05 21:07:58,824 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 37 predicate places. [2022-12-05 21:07:58,824 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 48 transitions, 337 flow [2022-12-05 21:07:58,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:58,826 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:07:58,826 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:07:58,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-05 21:07:59,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:59,032 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:07:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:07:59,032 INFO L85 PathProgramCache]: Analyzing trace with hash -477723093, now seen corresponding path program 3 times [2022-12-05 21:07:59,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:07:59,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318409518] [2022-12-05 21:07:59,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:07:59,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:07:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:07:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:59,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:07:59,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318409518] [2022-12-05 21:07:59,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318409518] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:59,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433807665] [2022-12-05 21:07:59,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:07:59,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:07:59,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:07:59,448 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) [2022-12-05 21:07:59,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-05 21:07:59,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:07:59,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:07:59,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-05 21:07:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:07:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:59,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:07:59,819 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-05 21:07:59,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-05 21:07:59,837 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:07:59,837 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 20 treesize of output 4 [2022-12-05 21:07:59,843 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:07:59,844 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 20 treesize of output 4 [2022-12-05 21:07:59,933 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:07:59,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433807665] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:07:59,934 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:07:59,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 20 [2022-12-05 21:07:59,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499796748] [2022-12-05 21:07:59,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:07:59,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:07:59,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:07:59,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:07:59,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-12-05 21:07:59,935 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:07:59,935 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 48 transitions, 337 flow. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:07:59,935 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:07:59,935 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:07:59,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:00,281 INFO L130 PetriNetUnfolder]: 396/723 cut-off events. [2022-12-05 21:08:00,281 INFO L131 PetriNetUnfolder]: For 1655/1655 co-relation queries the response was YES. [2022-12-05 21:08:00,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3171 conditions, 723 events. 396/723 cut-off events. For 1655/1655 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3226 event pairs, 120 based on Foata normal form. 16/739 useless extension candidates. Maximal degree in co-relation 3138. Up to 428 conditions per place. [2022-12-05 21:08:00,287 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 66 selfloop transitions, 20 changer transitions 0/86 dead transitions. [2022-12-05 21:08:00,287 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 86 transitions, 711 flow [2022-12-05 21:08:00,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:08:00,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:08:00,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 68 transitions. [2022-12-05 21:08:00,288 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.272 [2022-12-05 21:08:00,288 INFO L175 Difference]: Start difference. First operand has 62 places, 48 transitions, 337 flow. Second operand 10 states and 68 transitions. [2022-12-05 21:08:00,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 86 transitions, 711 flow [2022-12-05 21:08:00,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 678 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-12-05 21:08:00,293 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 407 flow [2022-12-05 21:08:00,293 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=407, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2022-12-05 21:08:00,294 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 43 predicate places. [2022-12-05 21:08:00,294 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 407 flow [2022-12-05 21:08:00,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:00,294 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:00,294 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:00,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:00,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-05 21:08:00,503 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:00,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:00,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1257129785, now seen corresponding path program 4 times [2022-12-05 21:08:00,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:00,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299327639] [2022-12-05 21:08:00,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:00,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:00,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:00,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299327639] [2022-12-05 21:08:00,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299327639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:00,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035151036] [2022-12-05 21:08:00,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:08:00,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:00,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:00,939 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) [2022-12-05 21:08:00,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-05 21:08:01,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:08:01,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:01,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:08:01,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:01,093 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 [2022-12-05 21:08:01,119 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 [2022-12-05 21:08:01,146 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 [2022-12-05 21:08:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:08:01,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:08:01,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035151036] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:01,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:08:01,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 23 [2022-12-05 21:08:01,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083264186] [2022-12-05 21:08:01,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:08:01,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:08:01,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:08:01,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:08:01,385 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:01,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 407 flow. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:01,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:01,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:01,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:01,723 INFO L130 PetriNetUnfolder]: 554/1008 cut-off events. [2022-12-05 21:08:01,723 INFO L131 PetriNetUnfolder]: For 2672/2672 co-relation queries the response was YES. [2022-12-05 21:08:01,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4716 conditions, 1008 events. 554/1008 cut-off events. For 2672/2672 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4963 event pairs, 164 based on Foata normal form. 2/1010 useless extension candidates. Maximal degree in co-relation 4681. Up to 729 conditions per place. [2022-12-05 21:08:01,731 INFO L137 encePairwiseOnDemand]: 17/25 looper letters, 88 selfloop transitions, 22 changer transitions 0/110 dead transitions. [2022-12-05 21:08:01,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 110 transitions, 1028 flow [2022-12-05 21:08:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:08:01,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:08:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 72 transitions. [2022-12-05 21:08:01,736 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36 [2022-12-05 21:08:01,736 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 407 flow. Second operand 8 states and 72 transitions. [2022-12-05 21:08:01,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 110 transitions, 1028 flow [2022-12-05 21:08:01,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 110 transitions, 958 flow, removed 9 selfloop flow, removed 7 redundant places. [2022-12-05 21:08:01,744 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 644 flow [2022-12-05 21:08:01,745 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=644, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2022-12-05 21:08:01,745 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 49 predicate places. [2022-12-05 21:08:01,745 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 644 flow [2022-12-05 21:08:01,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:01,745 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:01,745 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:01,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:01,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:01,951 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:01,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:01,951 INFO L85 PathProgramCache]: Analyzing trace with hash 360991869, now seen corresponding path program 5 times [2022-12-05 21:08:01,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:01,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90283435] [2022-12-05 21:08:01,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:01,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:02,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:02,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90283435] [2022-12-05 21:08:02,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90283435] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:02,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759444794] [2022-12-05 21:08:02,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:08:02,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:02,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:02,376 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) [2022-12-05 21:08:02,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-05 21:08:02,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:08:02,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:08:02,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:02,538 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 [2022-12-05 21:08:02,565 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 [2022-12-05 21:08:02,593 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 [2022-12-05 21:08:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:08:02,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:08:02,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759444794] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:02,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:08:02,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 24 [2022-12-05 21:08:02,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093108746] [2022-12-05 21:08:02,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:08:02,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-05 21:08:02,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:02,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-05 21:08:02,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:08:02,860 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:02,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 644 flow. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:02,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:02,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:02,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:03,318 INFO L130 PetriNetUnfolder]: 565/1038 cut-off events. [2022-12-05 21:08:03,319 INFO L131 PetriNetUnfolder]: For 3425/3425 co-relation queries the response was YES. [2022-12-05 21:08:03,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5048 conditions, 1038 events. 565/1038 cut-off events. For 3425/3425 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5207 event pairs, 165 based on Foata normal form. 2/1040 useless extension candidates. Maximal degree in co-relation 5010. Up to 683 conditions per place. [2022-12-05 21:08:03,327 INFO L137 encePairwiseOnDemand]: 16/25 looper letters, 102 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2022-12-05 21:08:03,327 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 1217 flow [2022-12-05 21:08:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:08:03,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:08:03,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 72 transitions. [2022-12-05 21:08:03,328 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.4114285714285714 [2022-12-05 21:08:03,328 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 644 flow. Second operand 7 states and 72 transitions. [2022-12-05 21:08:03,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 1217 flow [2022-12-05 21:08:03,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 1201 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-12-05 21:08:03,338 INFO L231 Difference]: Finished difference. Result has 85 places, 81 transitions, 839 flow [2022-12-05 21:08:03,338 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=839, PETRI_PLACES=85, PETRI_TRANSITIONS=81} [2022-12-05 21:08:03,339 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 60 predicate places. [2022-12-05 21:08:03,339 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 81 transitions, 839 flow [2022-12-05 21:08:03,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:03,339 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:03,339 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:03,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:03,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:03,545 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:03,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1961978061, now seen corresponding path program 6 times [2022-12-05 21:08:03,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:03,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973645241] [2022-12-05 21:08:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:03,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:03,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:03,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973645241] [2022-12-05 21:08:03,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973645241] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:03,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501421426] [2022-12-05 21:08:03,993 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:08:03,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:03,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:03,994 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) [2022-12-05 21:08:04,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-05 21:08:04,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:08:04,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:04,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 53 conjunts are in the unsatisfiable core [2022-12-05 21:08:04,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:04,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:04,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:05,147 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-05 21:08:05,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-05 21:08:05,171 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:05,171 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 20 treesize of output 4 [2022-12-05 21:08:05,198 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:05,199 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 20 treesize of output 4 [2022-12-05 21:08:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:05,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501421426] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:05,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:05,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 30 [2022-12-05 21:08:05,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560430387] [2022-12-05 21:08:05,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:05,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-05 21:08:05,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:05,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-05 21:08:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2022-12-05 21:08:05,417 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:05,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 81 transitions, 839 flow. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:05,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:05,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:05,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:07,835 INFO L130 PetriNetUnfolder]: 1231/2184 cut-off events. [2022-12-05 21:08:07,835 INFO L131 PetriNetUnfolder]: For 9472/9472 co-relation queries the response was YES. [2022-12-05 21:08:07,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11309 conditions, 2184 events. 1231/2184 cut-off events. For 9472/9472 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12549 event pairs, 95 based on Foata normal form. 11/2195 useless extension candidates. Maximal degree in co-relation 11254. Up to 491 conditions per place. [2022-12-05 21:08:07,863 INFO L137 encePairwiseOnDemand]: 8/25 looper letters, 190 selfloop transitions, 172 changer transitions 5/367 dead transitions. [2022-12-05 21:08:07,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 367 transitions, 3895 flow [2022-12-05 21:08:07,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-05 21:08:07,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-05 21:08:07,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 232 transitions. [2022-12-05 21:08:07,865 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2508108108108108 [2022-12-05 21:08:07,865 INFO L175 Difference]: Start difference. First operand has 85 places, 81 transitions, 839 flow. Second operand 37 states and 232 transitions. [2022-12-05 21:08:07,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 367 transitions, 3895 flow [2022-12-05 21:08:07,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 367 transitions, 3833 flow, removed 31 selfloop flow, removed 0 redundant places. [2022-12-05 21:08:07,899 INFO L231 Difference]: Finished difference. Result has 137 places, 223 transitions, 3008 flow [2022-12-05 21:08:07,899 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3008, PETRI_PLACES=137, PETRI_TRANSITIONS=223} [2022-12-05 21:08:07,899 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 112 predicate places. [2022-12-05 21:08:07,899 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 223 transitions, 3008 flow [2022-12-05 21:08:07,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 30 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:07,900 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:07,900 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:07,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:08,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:08,110 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:08,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:08,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2013058589, now seen corresponding path program 7 times [2022-12-05 21:08:08,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:08,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584126194] [2022-12-05 21:08:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:08,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:09,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:09,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:09,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584126194] [2022-12-05 21:08:09,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584126194] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:09,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548236782] [2022-12-05 21:08:09,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:08:09,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:09,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:09,129 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) [2022-12-05 21:08:09,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-05 21:08:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:09,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-05 21:08:09,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:09,341 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 [2022-12-05 21:08:09,373 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 [2022-12-05 21:08:09,450 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 [2022-12-05 21:08:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:09,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:09,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:09,950 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 48 treesize of output 37 [2022-12-05 21:08:09,960 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:09,960 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 1206 treesize of output 1090 [2022-12-05 21:08:09,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:09,972 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 1078 treesize of output 1023 [2022-12-05 21:08:09,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:09,986 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 1014 treesize of output 895 [2022-12-05 21:08:10,173 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:10,173 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 48 treesize of output 37 [2022-12-05 21:08:10,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:10,185 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 598 treesize of output 546 [2022-12-05 21:08:10,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:10,196 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 534 treesize of output 479 [2022-12-05 21:08:10,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:10,218 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 470 treesize of output 447 [2022-12-05 21:08:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:10,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548236782] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:10,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:10,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-12-05 21:08:10,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419065990] [2022-12-05 21:08:10,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:10,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-05 21:08:10,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-05 21:08:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=742, Unknown=25, NotChecked=0, Total=930 [2022-12-05 21:08:10,397 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:10,398 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 223 transitions, 3008 flow. Second operand has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:10,398 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:10,398 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:10,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:11,766 INFO L130 PetriNetUnfolder]: 1452/2596 cut-off events. [2022-12-05 21:08:11,766 INFO L131 PetriNetUnfolder]: For 18692/18692 co-relation queries the response was YES. [2022-12-05 21:08:11,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16118 conditions, 2596 events. 1452/2596 cut-off events. For 18692/18692 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15734 event pairs, 295 based on Foata normal form. 4/2600 useless extension candidates. Maximal degree in co-relation 15980. Up to 1166 conditions per place. [2022-12-05 21:08:11,796 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 177 selfloop transitions, 127 changer transitions 0/304 dead transitions. [2022-12-05 21:08:11,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 304 transitions, 4419 flow [2022-12-05 21:08:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-05 21:08:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-12-05 21:08:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 82 transitions. [2022-12-05 21:08:11,798 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2342857142857143 [2022-12-05 21:08:11,798 INFO L175 Difference]: Start difference. First operand has 137 places, 223 transitions, 3008 flow. Second operand 14 states and 82 transitions. [2022-12-05 21:08:11,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 304 transitions, 4419 flow [2022-12-05 21:08:11,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 304 transitions, 4009 flow, removed 183 selfloop flow, removed 9 redundant places. [2022-12-05 21:08:11,911 INFO L231 Difference]: Finished difference. Result has 144 places, 255 transitions, 3518 flow [2022-12-05 21:08:11,911 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=2665, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3518, PETRI_PLACES=144, PETRI_TRANSITIONS=255} [2022-12-05 21:08:11,911 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 119 predicate places. [2022-12-05 21:08:11,911 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 255 transitions, 3518 flow [2022-12-05 21:08:11,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 30 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:11,912 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:11,912 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:11,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:12,112 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,SelfDestructingSolverStorable25 [2022-12-05 21:08:12,112 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:12,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:12,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1715798645, now seen corresponding path program 8 times [2022-12-05 21:08:12,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:12,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969590464] [2022-12-05 21:08:12,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:12,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:12,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:12,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:12,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969590464] [2022-12-05 21:08:12,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969590464] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:12,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145064669] [2022-12-05 21:08:12,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:08:12,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:12,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:12,628 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:12,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-05 21:08:12,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:08:12,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:12,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-05 21:08:12,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:12,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:08:12,876 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 18 treesize of output 20 [2022-12-05 21:08:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:12,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:13,154 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_thread1Thread1of1ForFork1_~i~0 4))) (let ((.cse0 (forall ((~get2~0.offset Int) (v_ArrVal_859 (Array Int Int)) (~get2~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem2| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_859) ~get2~0.base) (+ .cse3 ~get2~0.offset))))))) (and (or .cse0 (<= 1 c_~n2~0)) (or .cse0 (<= 1 c_~n1~0)) (forall ((~get2~0.offset Int) (v_ArrVal_859 (Array Int Int)) (~get2~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_859))) (let ((.cse1 (select .cse2 ~get2~0.base))) (or (= (select .cse1 ~get2~0.offset) (select (select .cse2 c_~get1~0.base) c_~get1~0.offset)) (not (= |c_thread1Thread1of1ForFork1_#t~mem2| (select .cse1 (+ .cse3 ~get2~0.offset))))))))))) is different from false [2022-12-05 21:08:13,204 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-05 21:08:13,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 131 [2022-12-05 21:08:13,226 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:13,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 90 [2022-12-05 21:08:13,498 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:13,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-12-05 21:08:13,506 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:13,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-12-05 21:08:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:13,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145064669] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:13,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:13,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-12-05 21:08:13,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652578923] [2022-12-05 21:08:13,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:13,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-12-05 21:08:13,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:13,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-12-05 21:08:13,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=651, Unknown=1, NotChecked=52, Total=812 [2022-12-05 21:08:13,611 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:13,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 255 transitions, 3518 flow. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:13,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:13,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:13,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:14,759 INFO L130 PetriNetUnfolder]: 1792/3210 cut-off events. [2022-12-05 21:08:14,760 INFO L131 PetriNetUnfolder]: For 25547/25547 co-relation queries the response was YES. [2022-12-05 21:08:14,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20283 conditions, 3210 events. 1792/3210 cut-off events. For 25547/25547 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20386 event pairs, 283 based on Foata normal form. 54/3264 useless extension candidates. Maximal degree in co-relation 19802. Up to 1411 conditions per place. [2022-12-05 21:08:14,791 INFO L137 encePairwiseOnDemand]: 12/25 looper letters, 247 selfloop transitions, 120 changer transitions 0/367 dead transitions. [2022-12-05 21:08:14,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 367 transitions, 5405 flow [2022-12-05 21:08:14,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:08:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:08:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 73 transitions. [2022-12-05 21:08:14,793 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.26545454545454544 [2022-12-05 21:08:14,793 INFO L175 Difference]: Start difference. First operand has 144 places, 255 transitions, 3518 flow. Second operand 11 states and 73 transitions. [2022-12-05 21:08:14,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 367 transitions, 5405 flow [2022-12-05 21:08:14,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 367 transitions, 5266 flow, removed 58 selfloop flow, removed 6 redundant places. [2022-12-05 21:08:14,957 INFO L231 Difference]: Finished difference. Result has 150 places, 272 transitions, 3997 flow [2022-12-05 21:08:14,957 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3431, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3997, PETRI_PLACES=150, PETRI_TRANSITIONS=272} [2022-12-05 21:08:14,958 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 125 predicate places. [2022-12-05 21:08:14,958 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 272 transitions, 3997 flow [2022-12-05 21:08:14,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:14,958 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:14,958 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:14,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:15,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-05 21:08:15,163 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:15,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:15,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2125046197, now seen corresponding path program 9 times [2022-12-05 21:08:15,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:15,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985284571] [2022-12-05 21:08:15,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:15,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:15,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:15,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985284571] [2022-12-05 21:08:15,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985284571] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:15,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906638982] [2022-12-05 21:08:15,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:08:15,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:15,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:15,660 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:15,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-05 21:08:15,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:08:15,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:15,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-05 21:08:15,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:15,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:08:15,957 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 18 treesize of output 20 [2022-12-05 21:08:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:08:16,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:16,732 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~get2~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) (let ((.cse1 (forall ((v_ArrVal_898 (Array Int Int)) (~get2~0.base Int)) (not (= |c_thread1Thread1of1ForFork1_#t~mem2| (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_898) ~get2~0.base) .cse3)))))) (let ((.cse7 (or (< 0 c_~n1~0) .cse1)) (.cse0 (= 0 (mod c_thread1Thread1of1ForFork1_~stop~0 256)))) (and (or .cse0 (and (or .cse1 (< 0 c_~res1~0)) (forall ((v_ArrVal_898 (Array Int Int)) (~get2~0.base Int)) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_898))) (let ((.cse2 (select .cse6 ~get2~0.base))) (let ((.cse5 (select (select .cse6 c_~get1~0.base) c_~get1~0.offset)) (.cse4 (select .cse2 c_~get2~0.offset))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem2| (select .cse2 .cse3))) (< .cse4 .cse5) (= .cse5 .cse4)))))) .cse7)) (or (and (forall ((v_ArrVal_898 (Array Int Int)) (~get2~0.base Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_898))) (let ((.cse8 (select .cse9 ~get2~0.base))) (or (not (= |c_thread1Thread1of1ForFork1_#t~mem2| (select .cse8 .cse3))) (= (select (select .cse9 c_~get1~0.base) c_~get1~0.offset) (select .cse8 c_~get2~0.offset)))))) .cse7) (not .cse0)))))) is different from false [2022-12-05 21:08:16,800 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-05 21:08:16,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 180 [2022-12-05 21:08:16,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:16,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 123 treesize of output 131 [2022-12-05 21:08:17,124 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:17,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-12-05 21:08:17,130 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:17,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-12-05 21:08:17,173 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-05 21:08:17,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 131 [2022-12-05 21:08:17,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:17,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 90 [2022-12-05 21:08:17,549 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:17,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-12-05 21:08:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:08:17,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906638982] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:17,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:17,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 32 [2022-12-05 21:08:17,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615705044] [2022-12-05 21:08:17,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:17,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-05 21:08:17,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:17,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-05 21:08:17,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=894, Unknown=1, NotChecked=60, Total=1056 [2022-12-05 21:08:17,675 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:17,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 272 transitions, 3997 flow. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:17,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:17,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:17,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:19,104 INFO L130 PetriNetUnfolder]: 1820/3254 cut-off events. [2022-12-05 21:08:19,104 INFO L131 PetriNetUnfolder]: For 33076/33076 co-relation queries the response was YES. [2022-12-05 21:08:19,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21395 conditions, 3254 events. 1820/3254 cut-off events. For 33076/33076 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20623 event pairs, 351 based on Foata normal form. 44/3298 useless extension candidates. Maximal degree in co-relation 20907. Up to 1198 conditions per place. [2022-12-05 21:08:19,134 INFO L137 encePairwiseOnDemand]: 11/25 looper letters, 220 selfloop transitions, 134 changer transitions 0/354 dead transitions. [2022-12-05 21:08:19,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 354 transitions, 5510 flow [2022-12-05 21:08:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-05 21:08:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-12-05 21:08:19,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 86 transitions. [2022-12-05 21:08:19,135 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.215 [2022-12-05 21:08:19,135 INFO L175 Difference]: Start difference. First operand has 150 places, 272 transitions, 3997 flow. Second operand 16 states and 86 transitions. [2022-12-05 21:08:19,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 354 transitions, 5510 flow [2022-12-05 21:08:19,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 354 transitions, 5344 flow, removed 16 selfloop flow, removed 8 redundant places. [2022-12-05 21:08:19,297 INFO L231 Difference]: Finished difference. Result has 160 places, 290 transitions, 4377 flow [2022-12-05 21:08:19,298 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=3840, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4377, PETRI_PLACES=160, PETRI_TRANSITIONS=290} [2022-12-05 21:08:19,302 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 135 predicate places. [2022-12-05 21:08:19,302 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 290 transitions, 4377 flow [2022-12-05 21:08:19,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:19,303 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:19,303 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:19,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:19,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-05 21:08:19,508 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:19,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:19,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1043280113, now seen corresponding path program 10 times [2022-12-05 21:08:19,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:19,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909392628] [2022-12-05 21:08:19,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:19,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:19,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:19,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:19,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909392628] [2022-12-05 21:08:19,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909392628] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:19,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036965218] [2022-12-05 21:08:19,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:08:19,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:19,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:19,907 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:19,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-05 21:08:20,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:08:20,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:20,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:08:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:20,076 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 [2022-12-05 21:08:20,098 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 [2022-12-05 21:08:20,144 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 [2022-12-05 21:08:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:08:20,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:08:20,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036965218] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:20,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:08:20,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 10] total 25 [2022-12-05 21:08:20,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555539288] [2022-12-05 21:08:20,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:08:20,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:08:20,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:20,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:08:20,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=511, Unknown=2, NotChecked=0, Total=600 [2022-12-05 21:08:20,474 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:20,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 290 transitions, 4377 flow. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:20,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:20,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:20,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:21,735 INFO L130 PetriNetUnfolder]: 1810/3216 cut-off events. [2022-12-05 21:08:21,735 INFO L131 PetriNetUnfolder]: For 36502/36502 co-relation queries the response was YES. [2022-12-05 21:08:21,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22268 conditions, 3216 events. 1810/3216 cut-off events. For 36502/36502 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20218 event pairs, 402 based on Foata normal form. 2/3218 useless extension candidates. Maximal degree in co-relation 21773. Up to 1671 conditions per place. [2022-12-05 21:08:21,772 INFO L137 encePairwiseOnDemand]: 16/25 looper letters, 294 selfloop transitions, 88 changer transitions 0/382 dead transitions. [2022-12-05 21:08:21,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 382 transitions, 5941 flow [2022-12-05 21:08:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:08:21,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:08:21,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 107 transitions. [2022-12-05 21:08:21,774 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3890909090909091 [2022-12-05 21:08:21,774 INFO L175 Difference]: Start difference. First operand has 160 places, 290 transitions, 4377 flow. Second operand 11 states and 107 transitions. [2022-12-05 21:08:21,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 382 transitions, 5941 flow [2022-12-05 21:08:21,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 382 transitions, 5686 flow, removed 39 selfloop flow, removed 10 redundant places. [2022-12-05 21:08:21,970 INFO L231 Difference]: Finished difference. Result has 161 places, 290 transitions, 4335 flow [2022-12-05 21:08:21,970 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=4106, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4335, PETRI_PLACES=161, PETRI_TRANSITIONS=290} [2022-12-05 21:08:21,971 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 136 predicate places. [2022-12-05 21:08:21,971 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 290 transitions, 4335 flow [2022-12-05 21:08:21,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:21,971 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:21,972 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:21,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-12-05 21:08:22,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:22,173 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:22,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:22,174 INFO L85 PathProgramCache]: Analyzing trace with hash -636038823, now seen corresponding path program 11 times [2022-12-05 21:08:22,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:22,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664034375] [2022-12-05 21:08:22,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:22,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:22,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:22,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:22,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664034375] [2022-12-05 21:08:22,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664034375] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:22,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056810792] [2022-12-05 21:08:22,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:08:22,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:22,692 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:22,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-05 21:08:22,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:08:22,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:22,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-05 21:08:22,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:22,855 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 [2022-12-05 21:08:22,881 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 [2022-12-05 21:08:23,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:08:23,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:08:23,009 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-05 21:08:23,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 23 [2022-12-05 21:08:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:08:23,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:23,311 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:23,312 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 90 treesize of output 54 [2022-12-05 21:08:23,323 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:23,324 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 636 treesize of output 556 [2022-12-05 21:08:23,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:23,334 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 556 treesize of output 524 [2022-12-05 21:08:23,347 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:23,347 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 470 treesize of output 414 [2022-12-05 21:08:23,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:08:23,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056810792] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:23,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:23,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 30 [2022-12-05 21:08:23,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896803918] [2022-12-05 21:08:23,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:23,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-05 21:08:23,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:23,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-05 21:08:23,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=803, Unknown=5, NotChecked=0, Total=930 [2022-12-05 21:08:23,779 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:23,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 290 transitions, 4335 flow. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:23,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:23,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:23,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:25,147 INFO L130 PetriNetUnfolder]: 2383/4213 cut-off events. [2022-12-05 21:08:25,148 INFO L131 PetriNetUnfolder]: For 46114/46114 co-relation queries the response was YES. [2022-12-05 21:08:25,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28449 conditions, 4213 events. 2383/4213 cut-off events. For 46114/46114 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 27125 event pairs, 235 based on Foata normal form. 100/4313 useless extension candidates. Maximal degree in co-relation 28378. Up to 1707 conditions per place. [2022-12-05 21:08:25,254 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 242 selfloop transitions, 184 changer transitions 0/426 dead transitions. [2022-12-05 21:08:25,254 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 426 transitions, 6675 flow [2022-12-05 21:08:25,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-05 21:08:25,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-05 21:08:25,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 90 transitions. [2022-12-05 21:08:25,256 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3 [2022-12-05 21:08:25,256 INFO L175 Difference]: Start difference. First operand has 161 places, 290 transitions, 4335 flow. Second operand 12 states and 90 transitions. [2022-12-05 21:08:25,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 426 transitions, 6675 flow [2022-12-05 21:08:25,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 426 transitions, 6466 flow, removed 39 selfloop flow, removed 7 redundant places. [2022-12-05 21:08:25,557 INFO L231 Difference]: Finished difference. Result has 168 places, 339 transitions, 5439 flow [2022-12-05 21:08:25,557 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=4018, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5439, PETRI_PLACES=168, PETRI_TRANSITIONS=339} [2022-12-05 21:08:25,558 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 143 predicate places. [2022-12-05 21:08:25,558 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 339 transitions, 5439 flow [2022-12-05 21:08:25,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:25,558 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:25,558 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:25,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-05 21:08:25,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:25,759 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:25,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:25,759 INFO L85 PathProgramCache]: Analyzing trace with hash -648446351, now seen corresponding path program 12 times [2022-12-05 21:08:25,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:25,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844199843] [2022-12-05 21:08:25,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:25,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:26,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:26,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:26,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844199843] [2022-12-05 21:08:26,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844199843] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:26,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550056362] [2022-12-05 21:08:26,180 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:08:26,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:26,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:26,182 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:26,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-05 21:08:26,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:08:26,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:26,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-05 21:08:26,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:26,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:26,604 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:26,605 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 20 treesize of output 4 [2022-12-05 21:08:26,609 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:26,609 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 20 treesize of output 4 [2022-12-05 21:08:26,642 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-05 21:08:26,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-05 21:08:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:26,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550056362] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:26,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:26,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2022-12-05 21:08:26,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934863174] [2022-12-05 21:08:26,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:26,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-12-05 21:08:26,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:26,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-12-05 21:08:26,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:08:26,765 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:26,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 339 transitions, 5439 flow. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:26,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:26,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:26,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:27,719 INFO L130 PetriNetUnfolder]: 2550/4524 cut-off events. [2022-12-05 21:08:27,719 INFO L131 PetriNetUnfolder]: For 66871/66871 co-relation queries the response was YES. [2022-12-05 21:08:27,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33186 conditions, 4524 events. 2550/4524 cut-off events. For 66871/66871 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 29732 event pairs, 549 based on Foata normal form. 64/4588 useless extension candidates. Maximal degree in co-relation 33108. Up to 3027 conditions per place. [2022-12-05 21:08:27,755 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 265 selfloop transitions, 157 changer transitions 0/422 dead transitions. [2022-12-05 21:08:27,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 422 transitions, 7355 flow [2022-12-05 21:08:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:08:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:08:27,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 67 transitions. [2022-12-05 21:08:27,757 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.24363636363636362 [2022-12-05 21:08:27,757 INFO L175 Difference]: Start difference. First operand has 168 places, 339 transitions, 5439 flow. Second operand 11 states and 67 transitions. [2022-12-05 21:08:27,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 422 transitions, 7355 flow [2022-12-05 21:08:28,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 422 transitions, 7087 flow, removed 38 selfloop flow, removed 8 redundant places. [2022-12-05 21:08:28,099 INFO L231 Difference]: Finished difference. Result has 174 places, 353 transitions, 5988 flow [2022-12-05 21:08:28,100 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5988, PETRI_PLACES=174, PETRI_TRANSITIONS=353} [2022-12-05 21:08:28,100 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 149 predicate places. [2022-12-05 21:08:28,100 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 353 transitions, 5988 flow [2022-12-05 21:08:28,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:28,100 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:28,100 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:28,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:28,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-12-05 21:08:28,302 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:28,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:28,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2003442139, now seen corresponding path program 13 times [2022-12-05 21:08:28,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:28,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406450630] [2022-12-05 21:08:28,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:28,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:29,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:29,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406450630] [2022-12-05 21:08:29,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406450630] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:29,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359873712] [2022-12-05 21:08:29,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:08:29,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:29,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:29,114 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:29,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-05 21:08:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:29,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-05 21:08:29,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:29,308 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 [2022-12-05 21:08:29,346 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 [2022-12-05 21:08:29,385 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 [2022-12-05 21:08:29,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:29,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:29,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:29,751 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 48 treesize of output 37 [2022-12-05 21:08:29,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:29,759 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 598 treesize of output 546 [2022-12-05 21:08:29,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:29,768 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 534 treesize of output 479 [2022-12-05 21:08:29,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:29,787 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 470 treesize of output 447 [2022-12-05 21:08:29,918 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:29,919 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 48 treesize of output 37 [2022-12-05 21:08:29,928 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:29,928 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 598 treesize of output 546 [2022-12-05 21:08:29,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:29,939 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 534 treesize of output 479 [2022-12-05 21:08:29,950 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:29,951 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 470 treesize of output 447 [2022-12-05 21:08:30,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:30,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359873712] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:30,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:30,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-12-05 21:08:30,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155287739] [2022-12-05 21:08:30,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:30,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-05 21:08:30,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:30,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-05 21:08:30,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=623, Unknown=10, NotChecked=0, Total=756 [2022-12-05 21:08:30,136 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:30,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 353 transitions, 5988 flow. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:30,137 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:30,137 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:30,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:31,583 INFO L130 PetriNetUnfolder]: 2557/4549 cut-off events. [2022-12-05 21:08:31,583 INFO L131 PetriNetUnfolder]: For 74076/74076 co-relation queries the response was YES. [2022-12-05 21:08:31,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34997 conditions, 4549 events. 2557/4549 cut-off events. For 74076/74076 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30067 event pairs, 547 based on Foata normal form. 2/4551 useless extension candidates. Maximal degree in co-relation 34306. Up to 3027 conditions per place. [2022-12-05 21:08:31,621 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 249 selfloop transitions, 161 changer transitions 0/410 dead transitions. [2022-12-05 21:08:31,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 410 transitions, 7437 flow [2022-12-05 21:08:31,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:08:31,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:08:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 65 transitions. [2022-12-05 21:08:31,622 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.23636363636363636 [2022-12-05 21:08:31,623 INFO L175 Difference]: Start difference. First operand has 174 places, 353 transitions, 5988 flow. Second operand 11 states and 65 transitions. [2022-12-05 21:08:31,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 410 transitions, 7437 flow [2022-12-05 21:08:31,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 410 transitions, 7345 flow, removed 39 selfloop flow, removed 5 redundant places. [2022-12-05 21:08:31,911 INFO L231 Difference]: Finished difference. Result has 182 places, 359 transitions, 6391 flow [2022-12-05 21:08:31,911 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=5914, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6391, PETRI_PLACES=182, PETRI_TRANSITIONS=359} [2022-12-05 21:08:31,912 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 157 predicate places. [2022-12-05 21:08:31,912 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 359 transitions, 6391 flow [2022-12-05 21:08:31,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:31,912 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:31,912 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:31,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:32,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-12-05 21:08:32,117 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:32,117 INFO L85 PathProgramCache]: Analyzing trace with hash 2039667143, now seen corresponding path program 14 times [2022-12-05 21:08:32,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:32,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635332909] [2022-12-05 21:08:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:32,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:32,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:32,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635332909] [2022-12-05 21:08:32,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635332909] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:32,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778912187] [2022-12-05 21:08:32,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:08:32,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:32,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:32,436 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:32,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-05 21:08:32,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:08:32,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:32,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-05 21:08:32,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:32,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:32,758 INFO L321 Elim1Store]: treesize reduction 11, result has 84.9 percent of original size [2022-12-05 21:08:32,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 76 [2022-12-05 21:08:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:32,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778912187] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:32,873 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:08:32,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 21 [2022-12-05 21:08:32,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36672636] [2022-12-05 21:08:32,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:08:32,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:08:32,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:32,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:08:32,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:08:32,874 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:32,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 359 transitions, 6391 flow. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:32,874 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:32,874 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:32,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:33,703 INFO L130 PetriNetUnfolder]: 2555/4547 cut-off events. [2022-12-05 21:08:33,703 INFO L131 PetriNetUnfolder]: For 76588/76588 co-relation queries the response was YES. [2022-12-05 21:08:33,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35644 conditions, 4547 events. 2555/4547 cut-off events. For 76588/76588 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 30048 event pairs, 539 based on Foata normal form. 2/4549 useless extension candidates. Maximal degree in co-relation 35560. Up to 3031 conditions per place. [2022-12-05 21:08:33,746 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 241 selfloop transitions, 169 changer transitions 0/410 dead transitions. [2022-12-05 21:08:33,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 410 transitions, 7730 flow [2022-12-05 21:08:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:08:33,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:08:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 60 transitions. [2022-12-05 21:08:33,748 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.24 [2022-12-05 21:08:33,748 INFO L175 Difference]: Start difference. First operand has 182 places, 359 transitions, 6391 flow. Second operand 10 states and 60 transitions. [2022-12-05 21:08:33,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 410 transitions, 7730 flow [2022-12-05 21:08:34,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 410 transitions, 7394 flow, removed 17 selfloop flow, removed 7 redundant places. [2022-12-05 21:08:34,066 INFO L231 Difference]: Finished difference. Result has 187 places, 362 transitions, 6617 flow [2022-12-05 21:08:34,066 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6020, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6617, PETRI_PLACES=187, PETRI_TRANSITIONS=362} [2022-12-05 21:08:34,067 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 162 predicate places. [2022-12-05 21:08:34,067 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 362 transitions, 6617 flow [2022-12-05 21:08:34,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:34,067 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:34,067 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:34,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-05 21:08:34,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:34,268 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:34,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1830674507, now seen corresponding path program 15 times [2022-12-05 21:08:34,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:34,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823584002] [2022-12-05 21:08:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:34,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:34,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:34,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:34,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:34,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823584002] [2022-12-05 21:08:34,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823584002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:34,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648029800] [2022-12-05 21:08:34,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:08:34,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:34,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:34,631 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:34,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-05 21:08:34,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:08:34,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:34,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 27 conjunts are in the unsatisfiable core [2022-12-05 21:08:34,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:34,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:34,947 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:34,948 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 20 treesize of output 4 [2022-12-05 21:08:34,952 INFO L321 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2022-12-05 21:08:34,952 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 20 treesize of output 4 [2022-12-05 21:08:34,983 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-05 21:08:34,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-05 21:08:35,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:35,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648029800] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:35,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:08:35,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 10] total 23 [2022-12-05 21:08:35,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731346952] [2022-12-05 21:08:35,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:08:35,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:08:35,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:35,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:08:35,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:08:35,086 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:35,086 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 362 transitions, 6617 flow. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:35,086 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:35,086 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:35,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:36,007 INFO L130 PetriNetUnfolder]: 2541/4493 cut-off events. [2022-12-05 21:08:36,008 INFO L131 PetriNetUnfolder]: For 80972/80972 co-relation queries the response was YES. [2022-12-05 21:08:36,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36195 conditions, 4493 events. 2541/4493 cut-off events. For 80972/80972 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 29427 event pairs, 547 based on Foata normal form. 2/4495 useless extension candidates. Maximal degree in co-relation 35756. Up to 3031 conditions per place. [2022-12-05 21:08:36,043 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 240 selfloop transitions, 161 changer transitions 0/401 dead transitions. [2022-12-05 21:08:36,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 401 transitions, 7780 flow [2022-12-05 21:08:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:08:36,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:08:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 58 transitions. [2022-12-05 21:08:36,046 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.232 [2022-12-05 21:08:36,046 INFO L175 Difference]: Start difference. First operand has 187 places, 362 transitions, 6617 flow. Second operand 10 states and 58 transitions. [2022-12-05 21:08:36,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 401 transitions, 7780 flow [2022-12-05 21:08:36,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 401 transitions, 7611 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-12-05 21:08:36,329 INFO L231 Difference]: Finished difference. Result has 192 places, 364 transitions, 6809 flow [2022-12-05 21:08:36,329 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6414, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6809, PETRI_PLACES=192, PETRI_TRANSITIONS=364} [2022-12-05 21:08:36,329 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 167 predicate places. [2022-12-05 21:08:36,329 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 364 transitions, 6809 flow [2022-12-05 21:08:36,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:36,330 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:36,330 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:36,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-12-05 21:08:36,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:36,531 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:36,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:36,531 INFO L85 PathProgramCache]: Analyzing trace with hash 265536028, now seen corresponding path program 1 times [2022-12-05 21:08:36,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:36,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559175933] [2022-12-05 21:08:36,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:36,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:36,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:37,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:37,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559175933] [2022-12-05 21:08:37,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559175933] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:37,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734923117] [2022-12-05 21:08:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:37,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:37,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:37,711 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:37,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-05 21:08:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-05 21:08:37,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:37,936 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 [2022-12-05 21:08:37,964 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 [2022-12-05 21:08:37,997 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 [2022-12-05 21:08:38,242 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:38,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 78 [2022-12-05 21:08:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:38,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:44,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:44,915 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 47 treesize of output 36 [2022-12-05 21:08:44,927 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:08:44,927 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 1142 treesize of output 1021 [2022-12-05 21:08:44,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:44,940 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 1014 treesize of output 958 [2022-12-05 21:08:44,952 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:44,953 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 950 treesize of output 830 [2022-12-05 21:08:46,532 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:46,532 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 47 treesize of output 36 [2022-12-05 21:08:46,542 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:08:46,543 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 566 treesize of output 509 [2022-12-05 21:08:46,552 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:46,553 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 502 treesize of output 478 [2022-12-05 21:08:46,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:46,563 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 470 treesize of output 414 [2022-12-05 21:08:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:47,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734923117] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:08:47,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:08:47,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-12-05 21:08:47,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442209078] [2022-12-05 21:08:47,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:08:47,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-05 21:08:47,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:47,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-05 21:08:47,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1153, Unknown=15, NotChecked=0, Total=1406 [2022-12-05 21:08:47,108 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:47,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 364 transitions, 6809 flow. Second operand has 38 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:47,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:47,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:47,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:49,867 INFO L130 PetriNetUnfolder]: 2553/4527 cut-off events. [2022-12-05 21:08:49,867 INFO L131 PetriNetUnfolder]: For 83329/83329 co-relation queries the response was YES. [2022-12-05 21:08:49,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36762 conditions, 4527 events. 2553/4527 cut-off events. For 83329/83329 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29965 event pairs, 515 based on Foata normal form. 10/4537 useless extension candidates. Maximal degree in co-relation 36338. Up to 2388 conditions per place. [2022-12-05 21:08:49,915 INFO L137 encePairwiseOnDemand]: 10/25 looper letters, 331 selfloop transitions, 170 changer transitions 10/511 dead transitions. [2022-12-05 21:08:49,915 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 511 transitions, 10001 flow [2022-12-05 21:08:49,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-05 21:08:49,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-12-05 21:08:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 107 transitions. [2022-12-05 21:08:49,916 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.22526315789473683 [2022-12-05 21:08:49,916 INFO L175 Difference]: Start difference. First operand has 192 places, 364 transitions, 6809 flow. Second operand 19 states and 107 transitions. [2022-12-05 21:08:49,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 511 transitions, 10001 flow [2022-12-05 21:08:50,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 511 transitions, 9587 flow, removed 2 selfloop flow, removed 8 redundant places. [2022-12-05 21:08:50,233 INFO L231 Difference]: Finished difference. Result has 208 places, 393 transitions, 7502 flow [2022-12-05 21:08:50,233 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=6487, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7502, PETRI_PLACES=208, PETRI_TRANSITIONS=393} [2022-12-05 21:08:50,234 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 183 predicate places. [2022-12-05 21:08:50,234 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 393 transitions, 7502 flow [2022-12-05 21:08:50,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.5945945945945945) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:50,234 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:50,234 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:50,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:50,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:50,435 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:50,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:50,436 INFO L85 PathProgramCache]: Analyzing trace with hash 447823294, now seen corresponding path program 2 times [2022-12-05 21:08:50,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:50,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412538597] [2022-12-05 21:08:50,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:50,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:50,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:50,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:50,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412538597] [2022-12-05 21:08:50,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412538597] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:50,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054889670] [2022-12-05 21:08:50,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:08:50,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:50,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:50,920 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:50,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-05 21:08:51,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-05 21:08:51,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:51,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:08:51,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:51,360 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:08:51,361 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 81 treesize of output 45 [2022-12-05 21:08:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:08:51,396 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:08:51,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054889670] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:08:51,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:08:51,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2022-12-05 21:08:51,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855142147] [2022-12-05 21:08:51,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:08:51,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:08:51,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:51,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:08:51,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:08:51,399 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:51,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 393 transitions, 7502 flow. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:51,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:51,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:51,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:52,660 INFO L130 PetriNetUnfolder]: 2603/4634 cut-off events. [2022-12-05 21:08:52,661 INFO L131 PetriNetUnfolder]: For 86521/86521 co-relation queries the response was YES. [2022-12-05 21:08:52,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38343 conditions, 4634 events. 2603/4634 cut-off events. For 86521/86521 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30897 event pairs, 769 based on Foata normal form. 10/4644 useless extension candidates. Maximal degree in co-relation 38249. Up to 3607 conditions per place. [2022-12-05 21:08:52,701 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 389 selfloop transitions, 93 changer transitions 12/494 dead transitions. [2022-12-05 21:08:52,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 494 transitions, 9875 flow [2022-12-05 21:08:52,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:08:52,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:08:52,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 80 transitions. [2022-12-05 21:08:52,703 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32 [2022-12-05 21:08:52,703 INFO L175 Difference]: Start difference. First operand has 208 places, 393 transitions, 7502 flow. Second operand 10 states and 80 transitions. [2022-12-05 21:08:52,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 494 transitions, 9875 flow [2022-12-05 21:08:53,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 494 transitions, 9699 flow, removed 44 selfloop flow, removed 7 redundant places. [2022-12-05 21:08:53,046 INFO L231 Difference]: Finished difference. Result has 213 places, 407 transitions, 7831 flow [2022-12-05 21:08:53,047 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7349, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7831, PETRI_PLACES=213, PETRI_TRANSITIONS=407} [2022-12-05 21:08:53,047 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2022-12-05 21:08:53,047 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 407 transitions, 7831 flow [2022-12-05 21:08:53,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:53,047 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:53,047 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:53,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-12-05 21:08:53,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-12-05 21:08:53,248 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2123448482, now seen corresponding path program 3 times [2022-12-05 21:08:53,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:53,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769739846] [2022-12-05 21:08:53,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:53,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:54,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769739846] [2022-12-05 21:08:54,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769739846] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:54,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286865224] [2022-12-05 21:08:54,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:08:54,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:54,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:54,132 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:54,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-05 21:08:54,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-05 21:08:54,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:54,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:08:54,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:54,596 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:08:54,596 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 108 treesize of output 56 [2022-12-05 21:08:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:08:54,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:08:54,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286865224] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:08:54,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:08:54,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 22 [2022-12-05 21:08:54,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485214419] [2022-12-05 21:08:54,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:08:54,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:08:54,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:54,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:08:54,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:08:54,640 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:54,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 407 transitions, 7831 flow. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:54,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:54,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:54,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:08:55,730 INFO L130 PetriNetUnfolder]: 2595/4626 cut-off events. [2022-12-05 21:08:55,730 INFO L131 PetriNetUnfolder]: For 86564/86564 co-relation queries the response was YES. [2022-12-05 21:08:55,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38505 conditions, 4626 events. 2595/4626 cut-off events. For 86564/86564 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 30853 event pairs, 773 based on Foata normal form. 10/4636 useless extension candidates. Maximal degree in co-relation 38410. Up to 3607 conditions per place. [2022-12-05 21:08:55,853 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 375 selfloop transitions, 90 changer transitions 17/482 dead transitions. [2022-12-05 21:08:55,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 482 transitions, 9861 flow [2022-12-05 21:08:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:08:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:08:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 72 transitions. [2022-12-05 21:08:55,854 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.288 [2022-12-05 21:08:55,854 INFO L175 Difference]: Start difference. First operand has 213 places, 407 transitions, 7831 flow. Second operand 10 states and 72 transitions. [2022-12-05 21:08:55,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 482 transitions, 9861 flow [2022-12-05 21:08:56,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 482 transitions, 9750 flow, removed 8 selfloop flow, removed 5 redundant places. [2022-12-05 21:08:56,149 INFO L231 Difference]: Finished difference. Result has 218 places, 403 transitions, 7876 flow [2022-12-05 21:08:56,149 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7726, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7876, PETRI_PLACES=218, PETRI_TRANSITIONS=403} [2022-12-05 21:08:56,149 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 193 predicate places. [2022-12-05 21:08:56,149 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 403 transitions, 7876 flow [2022-12-05 21:08:56,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:56,150 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:08:56,150 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:08:56,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-05 21:08:56,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-12-05 21:08:56,350 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:08:56,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:08:56,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1510056360, now seen corresponding path program 4 times [2022-12-05 21:08:56,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:08:56,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708118902] [2022-12-05 21:08:56,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:08:56,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:08:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:08:57,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:08:57,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:08:57,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708118902] [2022-12-05 21:08:57,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708118902] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:57,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112985273] [2022-12-05 21:08:57,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:08:57,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:08:57,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:08:57,084 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:08:57,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-05 21:08:57,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:08:57,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:08:57,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-05 21:08:57,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:08:57,283 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 [2022-12-05 21:08:57,313 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 [2022-12-05 21:08:57,342 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 [2022-12-05 21:08:57,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:08:57,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 71 [2022-12-05 21:08:57,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:08:57,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:08:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:08:58,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112985273] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:08:58,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:08:58,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 12] total 31 [2022-12-05 21:08:58,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571630161] [2022-12-05 21:08:58,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:08:58,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:08:58,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:08:58,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:08:58,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-12-05 21:08:58,269 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:08:58,269 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 403 transitions, 7876 flow. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:08:58,270 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:08:58,270 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:08:58,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:00,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:09:02,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:09:03,934 INFO L130 PetriNetUnfolder]: 2580/4594 cut-off events. [2022-12-05 21:09:03,934 INFO L131 PetriNetUnfolder]: For 87087/87087 co-relation queries the response was YES. [2022-12-05 21:09:03,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38532 conditions, 4594 events. 2580/4594 cut-off events. For 87087/87087 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 30473 event pairs, 856 based on Foata normal form. 1/4595 useless extension candidates. Maximal degree in co-relation 38436. Up to 4124 conditions per place. [2022-12-05 21:09:03,982 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 379 selfloop transitions, 54 changer transitions 10/443 dead transitions. [2022-12-05 21:09:03,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 443 transitions, 9213 flow [2022-12-05 21:09:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:09:03,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:09:03,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 62 transitions. [2022-12-05 21:09:03,983 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.27555555555555555 [2022-12-05 21:09:03,983 INFO L175 Difference]: Start difference. First operand has 218 places, 403 transitions, 7876 flow. Second operand 9 states and 62 transitions. [2022-12-05 21:09:03,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 443 transitions, 9213 flow [2022-12-05 21:09:04,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 443 transitions, 8981 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-12-05 21:09:04,408 INFO L231 Difference]: Finished difference. Result has 218 places, 403 transitions, 7791 flow [2022-12-05 21:09:04,409 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7674, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7791, PETRI_PLACES=218, PETRI_TRANSITIONS=403} [2022-12-05 21:09:04,409 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 193 predicate places. [2022-12-05 21:09:04,409 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 403 transitions, 7791 flow [2022-12-05 21:09:04,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:04,409 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:04,409 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:04,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:04,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-12-05 21:09:04,615 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:04,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:04,615 INFO L85 PathProgramCache]: Analyzing trace with hash 573058484, now seen corresponding path program 5 times [2022-12-05 21:09:04,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:04,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127683103] [2022-12-05 21:09:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:04,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:05,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:05,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:05,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127683103] [2022-12-05 21:09:05,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127683103] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:05,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252991813] [2022-12-05 21:09:05,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:09:05,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:05,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:05,096 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:05,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-05 21:09:05,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:09:05,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:05,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-05 21:09:05,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:05,248 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-12-05 21:09:05,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 16 [2022-12-05 21:09:05,319 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-05 21:09:05,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-12-05 21:09:05,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-05 21:09:05,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:09:05,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:09:05,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:05,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 71 [2022-12-05 21:09:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:05,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:10,378 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:10,378 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 47 treesize of output 36 [2022-12-05 21:09:10,391 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:09:10,392 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 1142 treesize of output 1021 [2022-12-05 21:09:10,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:10,408 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 1014 treesize of output 894 [2022-12-05 21:09:10,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:10,426 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 886 treesize of output 830 [2022-12-05 21:09:11,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:11,367 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 47 treesize of output 36 [2022-12-05 21:09:11,377 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:09:11,377 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 566 treesize of output 509 [2022-12-05 21:09:11,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:11,388 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 502 treesize of output 446 [2022-12-05 21:09:11,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:11,402 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 438 treesize of output 414 [2022-12-05 21:09:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:11,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252991813] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:11,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:11,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 33 [2022-12-05 21:09:11,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137265476] [2022-12-05 21:09:11,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:11,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-05 21:09:11,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:11,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-05 21:09:11,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=971, Unknown=13, NotChecked=0, Total=1190 [2022-12-05 21:09:11,671 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:09:11,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 403 transitions, 7791 flow. Second operand has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:11,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:11,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:09:11,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:14,424 INFO L130 PetriNetUnfolder]: 2631/4727 cut-off events. [2022-12-05 21:09:14,425 INFO L131 PetriNetUnfolder]: For 87298/87298 co-relation queries the response was YES. [2022-12-05 21:09:14,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39339 conditions, 4727 events. 2631/4727 cut-off events. For 87298/87298 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 32038 event pairs, 695 based on Foata normal form. 13/4740 useless extension candidates. Maximal degree in co-relation 39243. Up to 3149 conditions per place. [2022-12-05 21:09:14,467 INFO L137 encePairwiseOnDemand]: 9/25 looper letters, 342 selfloop transitions, 194 changer transitions 24/560 dead transitions. [2022-12-05 21:09:14,467 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 560 transitions, 11023 flow [2022-12-05 21:09:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-12-05 21:09:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-12-05 21:09:14,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 142 transitions. [2022-12-05 21:09:14,469 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.21846153846153846 [2022-12-05 21:09:14,469 INFO L175 Difference]: Start difference. First operand has 218 places, 403 transitions, 7791 flow. Second operand 26 states and 142 transitions. [2022-12-05 21:09:14,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 560 transitions, 11023 flow [2022-12-05 21:09:14,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 560 transitions, 10877 flow, removed 10 selfloop flow, removed 7 redundant places. [2022-12-05 21:09:14,832 INFO L231 Difference]: Finished difference. Result has 246 places, 453 transitions, 9136 flow [2022-12-05 21:09:14,832 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=7679, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=9136, PETRI_PLACES=246, PETRI_TRANSITIONS=453} [2022-12-05 21:09:14,832 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 221 predicate places. [2022-12-05 21:09:14,833 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 453 transitions, 9136 flow [2022-12-05 21:09:14,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 34 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:14,833 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:14,833 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:14,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-12-05 21:09:15,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-12-05 21:09:15,038 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:15,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:15,038 INFO L85 PathProgramCache]: Analyzing trace with hash 33689842, now seen corresponding path program 1 times [2022-12-05 21:09:15,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:15,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813221468] [2022-12-05 21:09:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:15,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:09:15,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:15,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813221468] [2022-12-05 21:09:15,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813221468] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:15,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902117491] [2022-12-05 21:09:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:15,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:15,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:15,412 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:15,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-05 21:09:15,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:15,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-05 21:09:15,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:15,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:15,804 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 109 treesize of output 74 [2022-12-05 21:09:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:09:15,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:15,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:15,886 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 117 treesize of output 81 [2022-12-05 21:09:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:09:16,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902117491] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:16,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:16,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2022-12-05 21:09:16,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192349854] [2022-12-05 21:09:16,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:16,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-05 21:09:16,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-05 21:09:16,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-12-05 21:09:16,316 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:09:16,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 453 transitions, 9136 flow. Second operand has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:16,316 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:16,316 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:09:16,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:19,090 INFO L130 PetriNetUnfolder]: 3909/7419 cut-off events. [2022-12-05 21:09:19,090 INFO L131 PetriNetUnfolder]: For 157353/157355 co-relation queries the response was YES. [2022-12-05 21:09:19,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64802 conditions, 7419 events. 3909/7419 cut-off events. For 157353/157355 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 58601 event pairs, 598 based on Foata normal form. 136/7553 useless extension candidates. Maximal degree in co-relation 64669. Up to 1415 conditions per place. [2022-12-05 21:09:19,225 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 785 selfloop transitions, 225 changer transitions 40/1054 dead transitions. [2022-12-05 21:09:19,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 1054 transitions, 22888 flow [2022-12-05 21:09:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 21:09:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 21:09:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 189 transitions. [2022-12-05 21:09:19,227 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.315 [2022-12-05 21:09:19,227 INFO L175 Difference]: Start difference. First operand has 246 places, 453 transitions, 9136 flow. Second operand 24 states and 189 transitions. [2022-12-05 21:09:19,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 1054 transitions, 22888 flow [2022-12-05 21:09:20,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1054 transitions, 21582 flow, removed 206 selfloop flow, removed 17 redundant places. [2022-12-05 21:09:20,061 INFO L231 Difference]: Finished difference. Result has 258 places, 523 transitions, 10787 flow [2022-12-05 21:09:20,061 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=8521, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=10787, PETRI_PLACES=258, PETRI_TRANSITIONS=523} [2022-12-05 21:09:20,062 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 233 predicate places. [2022-12-05 21:09:20,062 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 523 transitions, 10787 flow [2022-12-05 21:09:20,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.1538461538461537) internal successors, (82), 26 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:20,062 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:20,062 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:20,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:20,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-12-05 21:09:20,263 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:20,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:20,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1418850802, now seen corresponding path program 6 times [2022-12-05 21:09:20,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:20,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426397735] [2022-12-05 21:09:20,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:20,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:21,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:21,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426397735] [2022-12-05 21:09:21,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426397735] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:21,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127434991] [2022-12-05 21:09:21,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:09:21,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:21,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:21,068 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:21,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-05 21:09:21,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-05 21:09:21,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:21,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:09:21,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:21,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:21,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 71 [2022-12-05 21:09:21,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:09:21,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:09:21,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127434991] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:09:21,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:09:21,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2022-12-05 21:09:21,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045932994] [2022-12-05 21:09:21,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:09:21,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:09:21,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:09:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:09:21,706 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:09:21,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 523 transitions, 10787 flow. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:21,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:21,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:09:21,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:23,969 INFO L130 PetriNetUnfolder]: 4361/7888 cut-off events. [2022-12-05 21:09:23,969 INFO L131 PetriNetUnfolder]: For 176713/176713 co-relation queries the response was YES. [2022-12-05 21:09:24,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69708 conditions, 7888 events. 4361/7888 cut-off events. For 176713/176713 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 59016 event pairs, 1401 based on Foata normal form. 6/7894 useless extension candidates. Maximal degree in co-relation 69160. Up to 5586 conditions per place. [2022-12-05 21:09:24,069 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 476 selfloop transitions, 99 changer transitions 22/597 dead transitions. [2022-12-05 21:09:24,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 597 transitions, 13261 flow [2022-12-05 21:09:24,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:09:24,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:09:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 66 transitions. [2022-12-05 21:09:24,071 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.264 [2022-12-05 21:09:24,071 INFO L175 Difference]: Start difference. First operand has 258 places, 523 transitions, 10787 flow. Second operand 10 states and 66 transitions. [2022-12-05 21:09:24,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 597 transitions, 13261 flow [2022-12-05 21:09:25,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 597 transitions, 12934 flow, removed 51 selfloop flow, removed 7 redundant places. [2022-12-05 21:09:25,157 INFO L231 Difference]: Finished difference. Result has 263 places, 529 transitions, 10896 flow [2022-12-05 21:09:25,158 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10524, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10896, PETRI_PLACES=263, PETRI_TRANSITIONS=529} [2022-12-05 21:09:25,158 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 238 predicate places. [2022-12-05 21:09:25,158 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 529 transitions, 10896 flow [2022-12-05 21:09:25,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:25,158 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:25,158 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:25,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:25,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:25,359 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:25,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:25,360 INFO L85 PathProgramCache]: Analyzing trace with hash 239697194, now seen corresponding path program 7 times [2022-12-05 21:09:25,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:25,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064412671] [2022-12-05 21:09:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:25,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:26,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:26,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:26,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064412671] [2022-12-05 21:09:26,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064412671] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:26,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142969611] [2022-12-05 21:09:26,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:09:26,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:26,591 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:26,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-05 21:09:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:26,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-05 21:09:26,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:26,788 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 [2022-12-05 21:09:26,821 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 [2022-12-05 21:09:26,856 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 [2022-12-05 21:09:27,121 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:09:27,121 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 107 treesize of output 55 [2022-12-05 21:09:27,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:27,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:36,471 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:36,471 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 47 treesize of output 36 [2022-12-05 21:09:36,485 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:09:36,486 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 278 treesize of output 253 [2022-12-05 21:09:36,496 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:36,497 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 246 treesize of output 222 [2022-12-05 21:09:36,529 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:36,529 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 214 treesize of output 206 [2022-12-05 21:09:36,704 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:36,704 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 47 treesize of output 36 [2022-12-05 21:09:36,718 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:09:36,718 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 278 treesize of output 253 [2022-12-05 21:09:36,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:36,729 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 246 treesize of output 222 [2022-12-05 21:09:36,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:36,740 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 214 treesize of output 206 [2022-12-05 21:09:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:37,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142969611] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:09:37,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:09:37,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-12-05 21:09:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918799152] [2022-12-05 21:09:37,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:09:37,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-12-05 21:09:37,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-12-05 21:09:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1145, Unknown=14, NotChecked=0, Total=1406 [2022-12-05 21:09:37,119 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:09:37,120 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 529 transitions, 10896 flow. Second operand has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:37,120 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:37,120 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:09:37,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:42,713 INFO L130 PetriNetUnfolder]: 4601/8526 cut-off events. [2022-12-05 21:09:42,713 INFO L131 PetriNetUnfolder]: For 172648/172648 co-relation queries the response was YES. [2022-12-05 21:09:42,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74263 conditions, 8526 events. 4601/8526 cut-off events. For 172648/172648 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 66705 event pairs, 1055 based on Foata normal form. 62/8588 useless extension candidates. Maximal degree in co-relation 73990. Up to 4579 conditions per place. [2022-12-05 21:09:42,811 INFO L137 encePairwiseOnDemand]: 10/25 looper letters, 469 selfloop transitions, 220 changer transitions 26/715 dead transitions. [2022-12-05 21:09:42,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 715 transitions, 15011 flow [2022-12-05 21:09:42,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-05 21:09:42,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-12-05 21:09:42,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 140 transitions. [2022-12-05 21:09:42,813 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.23333333333333334 [2022-12-05 21:09:42,813 INFO L175 Difference]: Start difference. First operand has 263 places, 529 transitions, 10896 flow. Second operand 24 states and 140 transitions. [2022-12-05 21:09:42,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 715 transitions, 15011 flow [2022-12-05 21:09:43,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 715 transitions, 14835 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-12-05 21:09:44,002 INFO L231 Difference]: Finished difference. Result has 285 places, 566 transitions, 11975 flow [2022-12-05 21:09:44,003 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=10741, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=11975, PETRI_PLACES=285, PETRI_TRANSITIONS=566} [2022-12-05 21:09:44,003 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 260 predicate places. [2022-12-05 21:09:44,004 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 566 transitions, 11975 flow [2022-12-05 21:09:44,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:44,004 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:44,004 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:44,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:44,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:44,206 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:44,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:44,206 INFO L85 PathProgramCache]: Analyzing trace with hash -934166878, now seen corresponding path program 8 times [2022-12-05 21:09:44,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:44,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464079454] [2022-12-05 21:09:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:44,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:45,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:45,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464079454] [2022-12-05 21:09:45,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464079454] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:45,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884885901] [2022-12-05 21:09:45,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:09:45,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:45,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:45,355 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:45,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-05 21:09:45,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-05 21:09:45,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:45,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-05 21:09:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:45,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:45,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 71 [2022-12-05 21:09:46,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:09:46,025 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:09:46,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884885901] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:09:46,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:09:46,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 23 [2022-12-05 21:09:46,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970701579] [2022-12-05 21:09:46,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:09:46,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:09:46,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:46,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:09:46,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-12-05 21:09:46,026 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:09:46,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 566 transitions, 11975 flow. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:46,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:46,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:09:46,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:48,293 INFO L130 PetriNetUnfolder]: 4523/8346 cut-off events. [2022-12-05 21:09:48,294 INFO L131 PetriNetUnfolder]: For 187508/187508 co-relation queries the response was YES. [2022-12-05 21:09:48,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74671 conditions, 8346 events. 4523/8346 cut-off events. For 187508/187508 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 64536 event pairs, 1486 based on Foata normal form. 6/8352 useless extension candidates. Maximal degree in co-relation 74112. Up to 5586 conditions per place. [2022-12-05 21:09:48,386 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 469 selfloop transitions, 113 changer transitions 22/604 dead transitions. [2022-12-05 21:09:48,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 604 transitions, 13736 flow [2022-12-05 21:09:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:09:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:09:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 65 transitions. [2022-12-05 21:09:48,387 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.26 [2022-12-05 21:09:48,387 INFO L175 Difference]: Start difference. First operand has 285 places, 566 transitions, 11975 flow. Second operand 10 states and 65 transitions. [2022-12-05 21:09:48,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 604 transitions, 13736 flow [2022-12-05 21:09:49,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 604 transitions, 13311 flow, removed 45 selfloop flow, removed 14 redundant places. [2022-12-05 21:09:49,635 INFO L231 Difference]: Finished difference. Result has 281 places, 561 transitions, 11672 flow [2022-12-05 21:09:49,636 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=11557, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11672, PETRI_PLACES=281, PETRI_TRANSITIONS=561} [2022-12-05 21:09:49,636 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 256 predicate places. [2022-12-05 21:09:49,636 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 561 transitions, 11672 flow [2022-12-05 21:09:49,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:49,636 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:49,636 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:49,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:49,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:49,837 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:49,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:49,837 INFO L85 PathProgramCache]: Analyzing trace with hash -2113320486, now seen corresponding path program 9 times [2022-12-05 21:09:49,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:49,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579031893] [2022-12-05 21:09:49,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:49,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:50,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:50,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579031893] [2022-12-05 21:09:50,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579031893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:50,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349589656] [2022-12-05 21:09:50,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:09:50,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:50,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:50,782 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:50,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-05 21:09:50,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-05 21:09:50,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:50,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-05 21:09:50,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:51,411 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:09:51,411 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 81 treesize of output 45 [2022-12-05 21:09:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:09:51,464 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:09:51,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349589656] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:09:51,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:09:51,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 23 [2022-12-05 21:09:51,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005088048] [2022-12-05 21:09:51,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:09:51,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:09:51,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:51,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:09:51,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-12-05 21:09:51,466 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:09:51,466 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 561 transitions, 11672 flow. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:51,466 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:51,466 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:09:51,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:09:53,877 INFO L130 PetriNetUnfolder]: 4516/8349 cut-off events. [2022-12-05 21:09:53,877 INFO L131 PetriNetUnfolder]: For 180864/180864 co-relation queries the response was YES. [2022-12-05 21:09:54,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73753 conditions, 8349 events. 4516/8349 cut-off events. For 180864/180864 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 64680 event pairs, 1026 based on Foata normal form. 30/8379 useless extension candidates. Maximal degree in co-relation 73461. Up to 4420 conditions per place. [2022-12-05 21:09:54,041 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 467 selfloop transitions, 136 changer transitions 16/619 dead transitions. [2022-12-05 21:09:54,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 619 transitions, 13727 flow [2022-12-05 21:09:54,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:09:54,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:09:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 75 transitions. [2022-12-05 21:09:54,042 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3 [2022-12-05 21:09:54,042 INFO L175 Difference]: Start difference. First operand has 281 places, 561 transitions, 11672 flow. Second operand 10 states and 75 transitions. [2022-12-05 21:09:54,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 619 transitions, 13727 flow [2022-12-05 21:09:55,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 619 transitions, 13467 flow, removed 10 selfloop flow, removed 8 redundant places. [2022-12-05 21:09:55,142 INFO L231 Difference]: Finished difference. Result has 284 places, 578 transitions, 12278 flow [2022-12-05 21:09:55,143 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=11430, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12278, PETRI_PLACES=284, PETRI_TRANSITIONS=578} [2022-12-05 21:09:55,143 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 259 predicate places. [2022-12-05 21:09:55,144 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 578 transitions, 12278 flow [2022-12-05 21:09:55,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:55,144 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:09:55,144 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:09:55,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-12-05 21:09:55,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-12-05 21:09:55,349 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:09:55,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:09:55,349 INFO L85 PathProgramCache]: Analyzing trace with hash -910534894, now seen corresponding path program 10 times [2022-12-05 21:09:55,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:09:55,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852179782] [2022-12-05 21:09:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:09:55,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:09:55,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:09:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:56,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:09:56,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852179782] [2022-12-05 21:09:56,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852179782] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:56,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056164269] [2022-12-05 21:09:56,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:09:56,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:09:56,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:09:56,203 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:09:56,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-05 21:09:56,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:09:56,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:09:56,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-05 21:09:56,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:09:56,540 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-05 21:09:56,603 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 [2022-12-05 21:09:56,672 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 [2022-12-05 21:09:57,223 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:09:57,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 71 [2022-12-05 21:09:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:09:57,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:09:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:09:58,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056164269] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:09:58,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:09:58,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11, 12] total 30 [2022-12-05 21:09:58,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265234829] [2022-12-05 21:09:58,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:09:58,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-05 21:09:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:09:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-05 21:09:58,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-12-05 21:09:58,454 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:09:58,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 578 transitions, 12278 flow. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:09:58,455 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:09:58,455 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:09:58,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:02,834 INFO L130 PetriNetUnfolder]: 4477/8279 cut-off events. [2022-12-05 21:10:02,835 INFO L131 PetriNetUnfolder]: For 185942/185942 co-relation queries the response was YES. [2022-12-05 21:10:02,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74608 conditions, 8279 events. 4477/8279 cut-off events. For 185942/185942 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63892 event pairs, 1581 based on Foata normal form. 3/8282 useless extension candidates. Maximal degree in co-relation 74313. Up to 7127 conditions per place. [2022-12-05 21:10:02,924 INFO L137 encePairwiseOnDemand]: 15/25 looper letters, 583 selfloop transitions, 50 changer transitions 15/648 dead transitions. [2022-12-05 21:10:02,924 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 648 transitions, 14604 flow [2022-12-05 21:10:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:10:02,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:10:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 69 transitions. [2022-12-05 21:10:02,925 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.345 [2022-12-05 21:10:02,925 INFO L175 Difference]: Start difference. First operand has 284 places, 578 transitions, 12278 flow. Second operand 8 states and 69 transitions. [2022-12-05 21:10:02,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 648 transitions, 14604 flow [2022-12-05 21:10:04,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 648 transitions, 14343 flow, removed 72 selfloop flow, removed 10 redundant places. [2022-12-05 21:10:04,098 INFO L231 Difference]: Finished difference. Result has 280 places, 572 transitions, 12041 flow [2022-12-05 21:10:04,099 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12063, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12041, PETRI_PLACES=280, PETRI_TRANSITIONS=572} [2022-12-05 21:10:04,099 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 255 predicate places. [2022-12-05 21:10:04,099 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 572 transitions, 12041 flow [2022-12-05 21:10:04,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:04,099 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:10:04,100 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:10:04,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-12-05 21:10:04,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-12-05 21:10:04,305 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:10:04,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:10:04,305 INFO L85 PathProgramCache]: Analyzing trace with hash 132220082, now seen corresponding path program 11 times [2022-12-05 21:10:04,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:10:04,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16709605] [2022-12-05 21:10:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:10:04,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:10:04,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:04,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:04,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:10:04,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16709605] [2022-12-05 21:10:04,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16709605] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:04,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237585822] [2022-12-05 21:10:04,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:10:04,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:04,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:10:04,789 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:10:04,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-05 21:10:04,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:10:04,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:10:04,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 61 conjunts are in the unsatisfiable core [2022-12-05 21:10:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:10:04,936 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-12-05 21:10:04,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 16 [2022-12-05 21:10:05,024 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-05 21:10:05,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-12-05 21:10:05,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-05 21:10:05,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:10:05,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:10:05,436 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:10:05,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 71 [2022-12-05 21:10:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:05,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:10:06,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:06,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237585822] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:10:06,097 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:10:06,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 29 [2022-12-05 21:10:06,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282117385] [2022-12-05 21:10:06,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:10:06,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-05 21:10:06,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:10:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-05 21:10:06,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-12-05 21:10:06,099 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:10:06,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 572 transitions, 12041 flow. Second operand has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:06,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:10:06,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:10:06,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:10,031 INFO L130 PetriNetUnfolder]: 5667/10549 cut-off events. [2022-12-05 21:10:10,031 INFO L131 PetriNetUnfolder]: For 222362/222362 co-relation queries the response was YES. [2022-12-05 21:10:10,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92002 conditions, 10549 events. 5667/10549 cut-off events. For 222362/222362 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 85437 event pairs, 1842 based on Foata normal form. 16/10565 useless extension candidates. Maximal degree in co-relation 91652. Up to 5574 conditions per place. [2022-12-05 21:10:10,152 INFO L137 encePairwiseOnDemand]: 12/25 looper letters, 638 selfloop transitions, 155 changer transitions 67/860 dead transitions. [2022-12-05 21:10:10,152 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 860 transitions, 18899 flow [2022-12-05 21:10:10,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 21:10:10,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 21:10:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 128 transitions. [2022-12-05 21:10:10,153 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2438095238095238 [2022-12-05 21:10:10,154 INFO L175 Difference]: Start difference. First operand has 280 places, 572 transitions, 12041 flow. Second operand 21 states and 128 transitions. [2022-12-05 21:10:10,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 860 transitions, 18899 flow [2022-12-05 21:10:11,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 860 transitions, 18756 flow, removed 12 selfloop flow, removed 5 redundant places. [2022-12-05 21:10:11,456 INFO L231 Difference]: Finished difference. Result has 295 places, 585 transitions, 12729 flow [2022-12-05 21:10:11,456 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=11955, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=12729, PETRI_PLACES=295, PETRI_TRANSITIONS=585} [2022-12-05 21:10:11,456 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 270 predicate places. [2022-12-05 21:10:11,456 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 585 transitions, 12729 flow [2022-12-05 21:10:11,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 30 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:11,457 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:10:11,457 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:10:11,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-12-05 21:10:11,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-12-05 21:10:11,657 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:10:11,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:10:11,658 INFO L85 PathProgramCache]: Analyzing trace with hash -2093868852, now seen corresponding path program 12 times [2022-12-05 21:10:11,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:10:11,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691899821] [2022-12-05 21:10:11,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:10:11,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:10:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:12,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:10:12,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691899821] [2022-12-05 21:10:12,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691899821] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:12,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154094477] [2022-12-05 21:10:12,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:10:12,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:12,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:10:12,323 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:10:12,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-05 21:10:12,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-05 21:10:12,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:10:12,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-05 21:10:12,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:10:12,981 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:10:12,982 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 81 treesize of output 45 [2022-12-05 21:10:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:10:13,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:10:13,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154094477] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:10:13,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:10:13,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2022-12-05 21:10:13,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950275122] [2022-12-05 21:10:13,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:10:13,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:10:13,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:10:13,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:10:13,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-12-05 21:10:13,038 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:10:13,038 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 585 transitions, 12729 flow. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:13,038 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:10:13,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:10:13,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:15,680 INFO L130 PetriNetUnfolder]: 5503/10161 cut-off events. [2022-12-05 21:10:15,680 INFO L131 PetriNetUnfolder]: For 223068/223068 co-relation queries the response was YES. [2022-12-05 21:10:15,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89299 conditions, 10161 events. 5503/10161 cut-off events. For 223068/223068 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 80949 event pairs, 1870 based on Foata normal form. 40/10201 useless extension candidates. Maximal degree in co-relation 89206. Up to 7128 conditions per place. [2022-12-05 21:10:15,795 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 443 selfloop transitions, 143 changer transitions 20/606 dead transitions. [2022-12-05 21:10:15,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 606 transitions, 14001 flow [2022-12-05 21:10:15,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:10:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:10:15,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 69 transitions. [2022-12-05 21:10:15,796 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.276 [2022-12-05 21:10:15,796 INFO L175 Difference]: Start difference. First operand has 295 places, 585 transitions, 12729 flow. Second operand 10 states and 69 transitions. [2022-12-05 21:10:15,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 606 transitions, 14001 flow [2022-12-05 21:10:17,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 606 transitions, 13774 flow, removed 14 selfloop flow, removed 16 redundant places. [2022-12-05 21:10:17,281 INFO L231 Difference]: Finished difference. Result has 279 places, 573 transitions, 12545 flow [2022-12-05 21:10:17,282 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12474, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12545, PETRI_PLACES=279, PETRI_TRANSITIONS=573} [2022-12-05 21:10:17,282 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 254 predicate places. [2022-12-05 21:10:17,282 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 573 transitions, 12545 flow [2022-12-05 21:10:17,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:17,282 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:10:17,282 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:10:17,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-12-05 21:10:17,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-12-05 21:10:17,483 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:10:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:10:17,484 INFO L85 PathProgramCache]: Analyzing trace with hash 631546024, now seen corresponding path program 13 times [2022-12-05 21:10:17,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:10:17,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215168474] [2022-12-05 21:10:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:10:17,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:10:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:18,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:18,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:10:18,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215168474] [2022-12-05 21:10:18,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215168474] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:18,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40533316] [2022-12-05 21:10:18,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:10:18,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:18,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:10:18,342 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:10:18,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-05 21:10:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:18,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-05 21:10:18,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:10:18,615 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 [2022-12-05 21:10:18,663 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 [2022-12-05 21:10:18,721 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 [2022-12-05 21:10:19,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:10:19,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 71 [2022-12-05 21:10:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:19,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:10:22,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:10:22,147 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 47 treesize of output 36 [2022-12-05 21:10:22,159 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:10:22,160 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 278 treesize of output 253 [2022-12-05 21:10:22,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:10:22,171 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 246 treesize of output 222 [2022-12-05 21:10:22,182 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:10:22,182 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 214 treesize of output 206 [2022-12-05 21:10:22,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:10:22,438 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 47 treesize of output 36 [2022-12-05 21:10:22,452 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:10:22,452 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 566 treesize of output 509 [2022-12-05 21:10:22,468 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:10:22,469 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 502 treesize of output 478 [2022-12-05 21:10:22,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:10:22,484 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 470 treesize of output 414 [2022-12-05 21:10:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:23,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40533316] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:10:23,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:10:23,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2022-12-05 21:10:23,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15480243] [2022-12-05 21:10:23,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:10:23,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-12-05 21:10:23,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:10:23,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-12-05 21:10:23,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1359, Unknown=11, NotChecked=0, Total=1560 [2022-12-05 21:10:23,377 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:10:23,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 573 transitions, 12545 flow. Second operand has 40 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:23,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:10:23,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:10:23,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:29,976 INFO L130 PetriNetUnfolder]: 5587/10205 cut-off events. [2022-12-05 21:10:29,976 INFO L131 PetriNetUnfolder]: For 180551/180551 co-relation queries the response was YES. [2022-12-05 21:10:30,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90477 conditions, 10205 events. 5587/10205 cut-off events. For 180551/180551 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 80115 event pairs, 921 based on Foata normal form. 4/10209 useless extension candidates. Maximal degree in co-relation 90390. Up to 3118 conditions per place. [2022-12-05 21:10:30,088 INFO L137 encePairwiseOnDemand]: 10/25 looper letters, 550 selfloop transitions, 379 changer transitions 35/964 dead transitions. [2022-12-05 21:10:30,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 964 transitions, 21016 flow [2022-12-05 21:10:30,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-12-05 21:10:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-12-05 21:10:30,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 182 transitions. [2022-12-05 21:10:30,089 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.19675675675675675 [2022-12-05 21:10:30,089 INFO L175 Difference]: Start difference. First operand has 279 places, 573 transitions, 12545 flow. Second operand 37 states and 182 transitions. [2022-12-05 21:10:30,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 964 transitions, 21016 flow [2022-12-05 21:10:31,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 964 transitions, 20555 flow, removed 13 selfloop flow, removed 10 redundant places. [2022-12-05 21:10:31,445 INFO L231 Difference]: Finished difference. Result has 313 places, 668 transitions, 14926 flow [2022-12-05 21:10:31,445 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=12157, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14926, PETRI_PLACES=313, PETRI_TRANSITIONS=668} [2022-12-05 21:10:31,446 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 288 predicate places. [2022-12-05 21:10:31,446 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 668 transitions, 14926 flow [2022-12-05 21:10:31,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:31,446 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:10:31,446 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:10:31,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-05 21:10:31,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:31,647 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:10:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:10:31,647 INFO L85 PathProgramCache]: Analyzing trace with hash 6763140, now seen corresponding path program 14 times [2022-12-05 21:10:31,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:10:31,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904675787] [2022-12-05 21:10:31,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:10:31,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:10:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:32,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:10:32,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904675787] [2022-12-05 21:10:32,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904675787] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:32,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379835816] [2022-12-05 21:10:32,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:10:32,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:32,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:10:32,904 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:10:32,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-05 21:10:33,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-05 21:10:33,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:10:33,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-05 21:10:33,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:10:33,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:10:33,287 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 18 treesize of output 20 [2022-12-05 21:10:33,664 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:10:33,664 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 81 treesize of output 45 [2022-12-05 21:10:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:10:33,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:10:33,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379835816] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:10:33,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:10:33,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 22 [2022-12-05 21:10:33,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147074686] [2022-12-05 21:10:33,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:10:33,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:10:33,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:10:33,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:10:33,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:10:33,710 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:10:33,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 668 transitions, 14926 flow. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:33,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:10:33,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:10:33,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:36,998 INFO L130 PetriNetUnfolder]: 5835/10763 cut-off events. [2022-12-05 21:10:36,998 INFO L131 PetriNetUnfolder]: For 250918/250918 co-relation queries the response was YES. [2022-12-05 21:10:37,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97421 conditions, 10763 events. 5835/10763 cut-off events. For 250918/250918 co-relation queries the response was YES. Maximal size of possible extension queue 687. Compared 86503 event pairs, 1763 based on Foata normal form. 20/10783 useless extension candidates. Maximal degree in co-relation 97323. Up to 7120 conditions per place. [2022-12-05 21:10:37,122 INFO L137 encePairwiseOnDemand]: 12/25 looper letters, 593 selfloop transitions, 175 changer transitions 13/781 dead transitions. [2022-12-05 21:10:37,122 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 781 transitions, 18282 flow [2022-12-05 21:10:37,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:10:37,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:10:37,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 78 transitions. [2022-12-05 21:10:37,123 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.28363636363636363 [2022-12-05 21:10:37,123 INFO L175 Difference]: Start difference. First operand has 313 places, 668 transitions, 14926 flow. Second operand 11 states and 78 transitions. [2022-12-05 21:10:37,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 781 transitions, 18282 flow [2022-12-05 21:10:38,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 781 transitions, 17024 flow, removed 180 selfloop flow, removed 23 redundant places. [2022-12-05 21:10:38,563 INFO L231 Difference]: Finished difference. Result has 291 places, 686 transitions, 14680 flow [2022-12-05 21:10:38,564 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=13831, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=668, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14680, PETRI_PLACES=291, PETRI_TRANSITIONS=686} [2022-12-05 21:10:38,564 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 266 predicate places. [2022-12-05 21:10:38,564 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 686 transitions, 14680 flow [2022-12-05 21:10:38,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:38,564 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:10:38,565 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:10:38,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-05 21:10:38,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-12-05 21:10:38,765 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:10:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:10:38,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1352938302, now seen corresponding path program 15 times [2022-12-05 21:10:38,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:10:38,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001453976] [2022-12-05 21:10:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:10:38,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:10:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:39,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:10:39,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001453976] [2022-12-05 21:10:39,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001453976] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:39,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280097953] [2022-12-05 21:10:39,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:10:39,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:39,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:10:39,756 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:10:39,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-05 21:10:40,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-05 21:10:40,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:10:40,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:10:40,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:10:40,478 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:10:40,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 71 [2022-12-05 21:10:40,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:10:40,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:10:40,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280097953] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:10:40,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:10:40,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2022-12-05 21:10:40,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326247941] [2022-12-05 21:10:40,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:10:40,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:10:40,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:10:40,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:10:40,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:10:40,568 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:10:40,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 686 transitions, 14680 flow. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:40,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:10:40,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:10:40,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:43,645 INFO L130 PetriNetUnfolder]: 5813/10736 cut-off events. [2022-12-05 21:10:43,645 INFO L131 PetriNetUnfolder]: For 214236/214236 co-relation queries the response was YES. [2022-12-05 21:10:43,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92912 conditions, 10736 events. 5813/10736 cut-off events. For 214236/214236 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 86305 event pairs, 1564 based on Foata normal form. 4/10740 useless extension candidates. Maximal degree in co-relation 92823. Up to 7836 conditions per place. [2022-12-05 21:10:43,759 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 421 selfloop transitions, 297 changer transitions 17/735 dead transitions. [2022-12-05 21:10:43,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 735 transitions, 16759 flow [2022-12-05 21:10:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:10:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:10:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 64 transitions. [2022-12-05 21:10:43,760 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.256 [2022-12-05 21:10:43,760 INFO L175 Difference]: Start difference. First operand has 291 places, 686 transitions, 14680 flow. Second operand 10 states and 64 transitions. [2022-12-05 21:10:43,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 735 transitions, 16759 flow [2022-12-05 21:10:45,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 735 transitions, 16533 flow, removed 20 selfloop flow, removed 8 redundant places. [2022-12-05 21:10:45,103 INFO L231 Difference]: Finished difference. Result has 293 places, 680 transitions, 14942 flow [2022-12-05 21:10:45,103 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=14470, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14942, PETRI_PLACES=293, PETRI_TRANSITIONS=680} [2022-12-05 21:10:45,103 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 268 predicate places. [2022-12-05 21:10:45,104 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 680 transitions, 14942 flow [2022-12-05 21:10:45,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:45,104 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:10:45,104 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:10:45,108 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-12-05 21:10:45,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-12-05 21:10:45,305 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:10:45,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:10:45,305 INFO L85 PathProgramCache]: Analyzing trace with hash -796595568, now seen corresponding path program 16 times [2022-12-05 21:10:45,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:10:45,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832872792] [2022-12-05 21:10:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:10:45,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:10:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:10:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:10:46,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:10:46,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832872792] [2022-12-05 21:10:46,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832872792] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:46,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762014438] [2022-12-05 21:10:46,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:10:46,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:10:46,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:10:46,594 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:10:46,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-12-05 21:10:46,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:10:46,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:10:46,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-05 21:10:46,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:10:46,794 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 [2022-12-05 21:10:46,831 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 [2022-12-05 21:10:46,946 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 [2022-12-05 21:10:47,212 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:10:47,213 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 81 treesize of output 45 [2022-12-05 21:10:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:10:47,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:10:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:10:48,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762014438] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:10:48,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:10:48,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13, 11] total 31 [2022-12-05 21:10:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795516333] [2022-12-05 21:10:48,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:10:48,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:10:48,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:10:48,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:10:48,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=850, Unknown=25, NotChecked=0, Total=992 [2022-12-05 21:10:48,187 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:10:48,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 680 transitions, 14942 flow. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:10:48,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:10:48,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:10:48,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:10:53,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:11:01,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:11:03,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:11:06,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:11:08,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:11:10,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:11:12,931 INFO L130 PetriNetUnfolder]: 5914/10986 cut-off events. [2022-12-05 21:11:12,931 INFO L131 PetriNetUnfolder]: For 233397/233397 co-relation queries the response was YES. [2022-12-05 21:11:13,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95930 conditions, 10986 events. 5914/10986 cut-off events. For 233397/233397 co-relation queries the response was YES. Maximal size of possible extension queue 718. Compared 89408 event pairs, 2005 based on Foata normal form. 4/10990 useless extension candidates. Maximal degree in co-relation 95841. Up to 7918 conditions per place. [2022-12-05 21:11:13,059 INFO L137 encePairwiseOnDemand]: 15/25 looper letters, 690 selfloop transitions, 108 changer transitions 7/805 dead transitions. [2022-12-05 21:11:13,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 805 transitions, 18512 flow [2022-12-05 21:11:13,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:11:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:11:13,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 82 transitions. [2022-12-05 21:11:13,060 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36444444444444446 [2022-12-05 21:11:13,060 INFO L175 Difference]: Start difference. First operand has 293 places, 680 transitions, 14942 flow. Second operand 9 states and 82 transitions. [2022-12-05 21:11:13,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 805 transitions, 18512 flow [2022-12-05 21:11:14,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 805 transitions, 17889 flow, removed 9 selfloop flow, removed 7 redundant places. [2022-12-05 21:11:14,423 INFO L231 Difference]: Finished difference. Result has 293 places, 692 transitions, 14915 flow [2022-12-05 21:11:14,423 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=14350, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=680, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14915, PETRI_PLACES=293, PETRI_TRANSITIONS=692} [2022-12-05 21:11:14,424 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 268 predicate places. [2022-12-05 21:11:14,424 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 692 transitions, 14915 flow [2022-12-05 21:11:14,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:11:14,424 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:11:14,424 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:11:14,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-12-05 21:11:14,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-12-05 21:11:14,629 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:11:14,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:11:14,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2024528752, now seen corresponding path program 17 times [2022-12-05 21:11:14,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:11:14,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569402278] [2022-12-05 21:11:14,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:11:14,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:11:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:11:15,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:11:15,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:11:15,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569402278] [2022-12-05 21:11:15,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569402278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:11:15,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113148357] [2022-12-05 21:11:15,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:11:15,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:11:15,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:11:15,932 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:11:15,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-12-05 21:11:16,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:11:16,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:11:16,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 55 conjunts are in the unsatisfiable core [2022-12-05 21:11:16,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:11:16,156 INFO L321 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2022-12-05 21:11:16,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 12 treesize of output 16 [2022-12-05 21:11:16,256 INFO L321 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-12-05 21:11:16,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-12-05 21:11:16,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-05 21:11:16,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:11:16,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-05 21:11:16,755 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:11:16,756 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 81 treesize of output 45 [2022-12-05 21:11:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:11:16,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:11:24,978 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-05 21:11:25,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:11:25,208 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 95 treesize of output 59 [2022-12-05 21:11:25,226 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:11:25,226 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 2283 treesize of output 2034 [2022-12-05 21:11:25,265 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:11:25,265 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 2027 treesize of output 1779 [2022-12-05 21:11:25,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:11:25,290 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 1771 treesize of output 1651 [2022-12-05 21:15:24,165 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:15:24,165 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 47 treesize of output 36 [2022-12-05 21:15:24,181 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:15:24,181 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 1142 treesize of output 1021 [2022-12-05 21:15:24,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:15:24,200 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 1014 treesize of output 958 [2022-12-05 21:15:24,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:15:24,218 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 950 treesize of output 830 [2022-12-05 21:15:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:24,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113148357] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:24,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:24,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2022-12-05 21:15:24,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015094926] [2022-12-05 21:15:24,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:24,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-05 21:15:24,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-05 21:15:24,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1195, Unknown=11, NotChecked=0, Total=1482 [2022-12-05 21:15:24,707 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:15:24,707 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 692 transitions, 14915 flow. Second operand has 39 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:24,707 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:24,707 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:15:24,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:30,923 INFO L130 PetriNetUnfolder]: 5991/11177 cut-off events. [2022-12-05 21:15:30,924 INFO L131 PetriNetUnfolder]: For 226123/226123 co-relation queries the response was YES. [2022-12-05 21:15:31,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96693 conditions, 11177 events. 5991/11177 cut-off events. For 226123/226123 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 91664 event pairs, 1598 based on Foata normal form. 34/11211 useless extension candidates. Maximal degree in co-relation 96603. Up to 8036 conditions per place. [2022-12-05 21:15:31,064 INFO L137 encePairwiseOnDemand]: 9/25 looper letters, 448 selfloop transitions, 372 changer transitions 19/839 dead transitions. [2022-12-05 21:15:31,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 839 transitions, 18592 flow [2022-12-05 21:15:31,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-05 21:15:31,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-05 21:15:31,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 126 transitions. [2022-12-05 21:15:31,066 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.17379310344827587 [2022-12-05 21:15:31,066 INFO L175 Difference]: Start difference. First operand has 293 places, 692 transitions, 14915 flow. Second operand 29 states and 126 transitions. [2022-12-05 21:15:31,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 839 transitions, 18592 flow [2022-12-05 21:15:32,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 839 transitions, 18415 flow, removed 29 selfloop flow, removed 3 redundant places. [2022-12-05 21:15:32,715 INFO L231 Difference]: Finished difference. Result has 327 places, 742 transitions, 16710 flow [2022-12-05 21:15:32,715 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=14761, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=322, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=16710, PETRI_PLACES=327, PETRI_TRANSITIONS=742} [2022-12-05 21:15:32,715 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 302 predicate places. [2022-12-05 21:15:32,716 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 742 transitions, 16710 flow [2022-12-05 21:15:32,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.4736842105263157) internal successors, (56), 38 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:32,716 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:32,716 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:32,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-12-05 21:15:32,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:32,922 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:32,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:32,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1914990902, now seen corresponding path program 18 times [2022-12-05 21:15:32,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:32,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673038319] [2022-12-05 21:15:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:32,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:32,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:33,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:33,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673038319] [2022-12-05 21:15:33,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673038319] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:33,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866212223] [2022-12-05 21:15:33,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:15:33,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:33,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:33,835 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:15:33,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-12-05 21:15:33,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2022-12-05 21:15:33,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:33,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-05 21:15:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:34,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:15:34,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 71 [2022-12-05 21:15:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:15:34,480 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:15:34,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866212223] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:34,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:15:34,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 21 [2022-12-05 21:15:34,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987919704] [2022-12-05 21:15:34,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:34,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-05 21:15:34,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:34,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-05 21:15:34,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-12-05 21:15:34,481 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:15:34,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 742 transitions, 16710 flow. Second operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:34,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:34,482 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:15:34,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:37,865 INFO L130 PetriNetUnfolder]: 5961/11119 cut-off events. [2022-12-05 21:15:37,865 INFO L131 PetriNetUnfolder]: For 242890/242890 co-relation queries the response was YES. [2022-12-05 21:15:38,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99981 conditions, 11119 events. 5961/11119 cut-off events. For 242890/242890 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 90726 event pairs, 1661 based on Foata normal form. 4/11123 useless extension candidates. Maximal degree in co-relation 99883. Up to 8212 conditions per place. [2022-12-05 21:15:38,069 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 454 selfloop transitions, 315 changer transitions 13/782 dead transitions. [2022-12-05 21:15:38,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 782 transitions, 18705 flow [2022-12-05 21:15:38,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:15:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:15:38,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 62 transitions. [2022-12-05 21:15:38,070 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.248 [2022-12-05 21:15:38,070 INFO L175 Difference]: Start difference. First operand has 327 places, 742 transitions, 16710 flow. Second operand 10 states and 62 transitions. [2022-12-05 21:15:38,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 782 transitions, 18705 flow [2022-12-05 21:15:40,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 782 transitions, 18302 flow, removed 137 selfloop flow, removed 14 redundant places. [2022-12-05 21:15:40,293 INFO L231 Difference]: Finished difference. Result has 320 places, 736 transitions, 16828 flow [2022-12-05 21:15:40,293 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=16325, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16828, PETRI_PLACES=320, PETRI_TRANSITIONS=736} [2022-12-05 21:15:40,293 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 295 predicate places. [2022-12-05 21:15:40,294 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 736 transitions, 16828 flow [2022-12-05 21:15:40,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:40,294 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:40,294 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:40,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-12-05 21:15:40,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:40,495 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:40,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:40,495 INFO L85 PathProgramCache]: Analyzing trace with hash -491429100, now seen corresponding path program 19 times [2022-12-05 21:15:40,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:40,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279788002] [2022-12-05 21:15:40,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:40,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:41,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:41,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:41,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279788002] [2022-12-05 21:15:41,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279788002] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:41,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747846280] [2022-12-05 21:15:41,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:15:41,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:41,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:41,659 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:15:41,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-12-05 21:15:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:41,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-05 21:15:41,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:41,925 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 [2022-12-05 21:15:41,978 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 [2022-12-05 21:15:42,029 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 [2022-12-05 21:15:42,465 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:15:42,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 71 [2022-12-05 21:15:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:42,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:15:45,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:15:45,491 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 47 treesize of output 36 [2022-12-05 21:15:45,506 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:15:45,507 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 1142 treesize of output 1021 [2022-12-05 21:15:45,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:15:45,521 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 1014 treesize of output 894 [2022-12-05 21:15:45,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:15:45,538 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 886 treesize of output 830 [2022-12-05 21:15:46,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:15:46,896 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 47 treesize of output 36 [2022-12-05 21:15:46,915 INFO L321 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2022-12-05 21:15:46,915 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 278 treesize of output 253 [2022-12-05 21:15:46,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:15:46,932 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 246 treesize of output 222 [2022-12-05 21:15:46,949 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:15:46,949 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 214 treesize of output 206 [2022-12-05 21:15:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:47,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747846280] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:15:47,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:15:47,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 35 [2022-12-05 21:15:47,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559785315] [2022-12-05 21:15:47,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:15:47,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-05 21:15:47,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:47,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-05 21:15:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1141, Unknown=11, NotChecked=0, Total=1332 [2022-12-05 21:15:47,456 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:15:47,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 736 transitions, 16828 flow. Second operand has 37 states, 36 states have (on average 1.5) internal successors, (54), 36 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:47,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:47,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:15:47,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:15:53,907 INFO L130 PetriNetUnfolder]: 6158/11362 cut-off events. [2022-12-05 21:15:53,907 INFO L131 PetriNetUnfolder]: For 260367/260367 co-relation queries the response was YES. [2022-12-05 21:15:54,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104026 conditions, 11362 events. 6158/11362 cut-off events. For 260367/260367 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 92227 event pairs, 1610 based on Foata normal form. 4/11366 useless extension candidates. Maximal degree in co-relation 103929. Up to 8164 conditions per place. [2022-12-05 21:15:54,093 INFO L137 encePairwiseOnDemand]: 10/25 looper letters, 449 selfloop transitions, 364 changer transitions 18/831 dead transitions. [2022-12-05 21:15:54,093 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 831 transitions, 20065 flow [2022-12-05 21:15:54,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-05 21:15:54,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-12-05 21:15:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 89 transitions. [2022-12-05 21:15:54,095 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.178 [2022-12-05 21:15:54,095 INFO L175 Difference]: Start difference. First operand has 320 places, 736 transitions, 16828 flow. Second operand 20 states and 89 transitions. [2022-12-05 21:15:54,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 831 transitions, 20065 flow [2022-12-05 21:15:55,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 831 transitions, 19409 flow, removed 13 selfloop flow, removed 9 redundant places. [2022-12-05 21:15:55,806 INFO L231 Difference]: Finished difference. Result has 332 places, 764 transitions, 17708 flow [2022-12-05 21:15:55,806 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=16186, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=17708, PETRI_PLACES=332, PETRI_TRANSITIONS=764} [2022-12-05 21:15:55,806 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 307 predicate places. [2022-12-05 21:15:55,806 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 764 transitions, 17708 flow [2022-12-05 21:15:55,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.5) internal successors, (54), 36 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:55,807 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:15:55,807 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:15:55,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-12-05 21:15:56,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:56,007 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:15:56,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:15:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2089143474, now seen corresponding path program 20 times [2022-12-05 21:15:56,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:15:56,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863619697] [2022-12-05 21:15:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:15:56,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:15:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:15:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:15:57,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:15:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863619697] [2022-12-05 21:15:57,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863619697] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:15:57,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320255342] [2022-12-05 21:15:57,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:15:57,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:15:57,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:15:57,495 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:15:57,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-12-05 21:15:57,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-05 21:15:57,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:15:57,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-05 21:15:57,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:15:57,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:15:57,953 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 18 treesize of output 20 [2022-12-05 21:15:58,433 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:15:58,433 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 81 treesize of output 45 [2022-12-05 21:15:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:15:58,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:15:58,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320255342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:15:58,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:15:58,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 24 [2022-12-05 21:15:58,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723725728] [2022-12-05 21:15:58,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:15:58,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:15:58,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:15:58,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:15:58,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-12-05 21:15:58,484 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:15:58,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 764 transitions, 17708 flow. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:15:58,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:15:58,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:15:58,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:16:02,058 INFO L130 PetriNetUnfolder]: 6072/11140 cut-off events. [2022-12-05 21:16:02,058 INFO L131 PetriNetUnfolder]: For 275597/275597 co-relation queries the response was YES. [2022-12-05 21:16:02,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103292 conditions, 11140 events. 6072/11140 cut-off events. For 275597/275597 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 89479 event pairs, 1298 based on Foata normal form. 20/11160 useless extension candidates. Maximal degree in co-relation 103192. Up to 5696 conditions per place. [2022-12-05 21:16:02,198 INFO L137 encePairwiseOnDemand]: 12/25 looper letters, 581 selfloop transitions, 248 changer transitions 18/847 dead transitions. [2022-12-05 21:16:02,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 847 transitions, 20739 flow [2022-12-05 21:16:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-05 21:16:02,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-12-05 21:16:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 78 transitions. [2022-12-05 21:16:02,199 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.28363636363636363 [2022-12-05 21:16:02,199 INFO L175 Difference]: Start difference. First operand has 332 places, 764 transitions, 17708 flow. Second operand 11 states and 78 transitions. [2022-12-05 21:16:02,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 847 transitions, 20739 flow [2022-12-05 21:16:03,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 847 transitions, 20318 flow, removed 39 selfloop flow, removed 8 redundant places. [2022-12-05 21:16:03,924 INFO L231 Difference]: Finished difference. Result has 328 places, 798 transitions, 18712 flow [2022-12-05 21:16:03,924 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=17298, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=18712, PETRI_PLACES=328, PETRI_TRANSITIONS=798} [2022-12-05 21:16:03,925 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 303 predicate places. [2022-12-05 21:16:03,925 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 798 transitions, 18712 flow [2022-12-05 21:16:03,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:16:03,925 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:16:03,925 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:16:03,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-12-05 21:16:04,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-12-05 21:16:04,126 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:16:04,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:16:04,126 INFO L85 PathProgramCache]: Analyzing trace with hash 216765194, now seen corresponding path program 21 times [2022-12-05 21:16:04,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:16:04,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062174721] [2022-12-05 21:16:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:16:04,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:16:04,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:16:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:05,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:16:05,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062174721] [2022-12-05 21:16:05,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062174721] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:16:05,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998190370] [2022-12-05 21:16:05,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:16:05,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:16:05,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:16:05,151 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:16:05,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-12-05 21:16:05,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-05 21:16:05,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:16:05,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 37 conjunts are in the unsatisfiable core [2022-12-05 21:16:05,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:16:05,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:16:05,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:16:05,790 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-05 21:16:05,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-12-05 21:16:06,062 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:16:06,062 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 81 treesize of output 45 [2022-12-05 21:16:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:16:06,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-05 21:16:06,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998190370] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:16:06,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-05 21:16:06,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 22 [2022-12-05 21:16:06,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793905907] [2022-12-05 21:16:06,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:16:06,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-05 21:16:06,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:16:06,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-05 21:16:06,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-12-05 21:16:06,113 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:16:06,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 798 transitions, 18712 flow. Second operand has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:16:06,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:16:06,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:16:06,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:16:10,445 INFO L130 PetriNetUnfolder]: 6041/11099 cut-off events. [2022-12-05 21:16:10,445 INFO L131 PetriNetUnfolder]: For 279264/279264 co-relation queries the response was YES. [2022-12-05 21:16:10,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104984 conditions, 11099 events. 6041/11099 cut-off events. For 279264/279264 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 89406 event pairs, 1707 based on Foata normal form. 36/11135 useless extension candidates. Maximal degree in co-relation 104880. Up to 7158 conditions per place. [2022-12-05 21:16:10,581 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 602 selfloop transitions, 210 changer transitions 21/833 dead transitions. [2022-12-05 21:16:10,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 833 transitions, 20778 flow [2022-12-05 21:16:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-05 21:16:10,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-12-05 21:16:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 72 transitions. [2022-12-05 21:16:10,582 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.288 [2022-12-05 21:16:10,583 INFO L175 Difference]: Start difference. First operand has 328 places, 798 transitions, 18712 flow. Second operand 10 states and 72 transitions. [2022-12-05 21:16:10,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 833 transitions, 20778 flow [2022-12-05 21:16:12,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 833 transitions, 20547 flow, removed 21 selfloop flow, removed 5 redundant places. [2022-12-05 21:16:12,333 INFO L231 Difference]: Finished difference. Result has 331 places, 785 transitions, 18620 flow [2022-12-05 21:16:12,333 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=18442, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=796, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18620, PETRI_PLACES=331, PETRI_TRANSITIONS=785} [2022-12-05 21:16:12,334 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 306 predicate places. [2022-12-05 21:16:12,334 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 785 transitions, 18620 flow [2022-12-05 21:16:12,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:16:12,334 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:16:12,334 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:16:12,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-12-05 21:16:12,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-12-05 21:16:12,535 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:16:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:16:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash 2103451820, now seen corresponding path program 22 times [2022-12-05 21:16:12,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:16:12,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929033179] [2022-12-05 21:16:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:16:12,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:16:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:16:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:13,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:16:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929033179] [2022-12-05 21:16:13,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929033179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:16:13,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057939959] [2022-12-05 21:16:13,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:16:13,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:16:13,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:16:13,470 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:16:13,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-12-05 21:16:13,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:16:13,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:16:13,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-05 21:16:13,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:16:13,737 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 [2022-12-05 21:16:13,777 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 [2022-12-05 21:16:13,915 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 [2022-12-05 21:16:14,207 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:16:14,207 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 81 treesize of output 45 [2022-12-05 21:16:14,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:14,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:16:17,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:16:17,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057939959] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:16:17,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:16:17,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11, 12] total 30 [2022-12-05 21:16:17,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212209981] [2022-12-05 21:16:17,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:16:17,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-05 21:16:17,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:16:17,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-05 21:16:17,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=794, Unknown=21, NotChecked=0, Total=930 [2022-12-05 21:16:17,231 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:16:17,231 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 785 transitions, 18620 flow. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:16:17,231 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:16:17,231 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:16:17,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:16:22,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:24,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:26,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:28,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:30,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:32,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:35,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:39,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:41,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:43,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:46,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:49,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-05 21:16:50,765 INFO L130 PetriNetUnfolder]: 5984/10950 cut-off events. [2022-12-05 21:16:50,766 INFO L131 PetriNetUnfolder]: For 275469/275469 co-relation queries the response was YES. [2022-12-05 21:16:50,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103602 conditions, 10950 events. 5984/10950 cut-off events. For 275469/275469 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 87353 event pairs, 1988 based on Foata normal form. 4/10954 useless extension candidates. Maximal degree in co-relation 103498. Up to 7945 conditions per place. [2022-12-05 21:16:51,107 INFO L137 encePairwiseOnDemand]: 15/25 looper letters, 777 selfloop transitions, 95 changer transitions 6/878 dead transitions. [2022-12-05 21:16:51,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 878 transitions, 21988 flow [2022-12-05 21:16:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:16:51,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:16:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 81 transitions. [2022-12-05 21:16:51,108 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.36 [2022-12-05 21:16:51,108 INFO L175 Difference]: Start difference. First operand has 331 places, 785 transitions, 18620 flow. Second operand 9 states and 81 transitions. [2022-12-05 21:16:51,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 878 transitions, 21988 flow [2022-12-05 21:16:52,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 878 transitions, 21478 flow, removed 16 selfloop flow, removed 11 redundant places. [2022-12-05 21:16:52,821 INFO L231 Difference]: Finished difference. Result has 327 places, 785 transitions, 18370 flow [2022-12-05 21:16:52,821 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=18168, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18370, PETRI_PLACES=327, PETRI_TRANSITIONS=785} [2022-12-05 21:16:52,822 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 302 predicate places. [2022-12-05 21:16:52,822 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 785 transitions, 18370 flow [2022-12-05 21:16:52,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:16:52,822 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:16:52,822 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:16:52,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-12-05 21:16:53,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-12-05 21:16:53,028 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:16:53,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:16:53,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1630662944, now seen corresponding path program 23 times [2022-12-05 21:16:53,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:16:53,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388585214] [2022-12-05 21:16:53,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:16:53,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:16:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:16:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:54,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:16:54,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388585214] [2022-12-05 21:16:54,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388585214] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:16:54,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867923085] [2022-12-05 21:16:54,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:16:54,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:16:54,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:16:54,022 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:16:54,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-12-05 21:16:54,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:16:54,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:16:54,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-05 21:16:54,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:16:54,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:16:54,522 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 18 treesize of output 20 [2022-12-05 21:16:54,752 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-05 21:16:54,752 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 81 treesize of output 45 [2022-12-05 21:16:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:54,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:16:55,325 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~get2~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))) (and (< 0 c_~n1~0) (< 0 c_~n2~0) (forall ((~get2~0.base Int) (v_ArrVal_2111 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2111))) (let ((.cse2 (select .cse4 ~get2~0.base))) (let ((.cse1 (select (select .cse4 c_~get1~0.base) c_~get1~0.offset)) (.cse0 (select .cse2 c_~get2~0.offset))) (or (< .cse0 .cse1) (= .cse1 .cse0) (< |c_thread1Thread1of1ForFork1_#t~mem4| (select .cse2 .cse3))))))) (forall ((~get2~0.base Int) (v_ArrVal_2111 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2111))) (let ((.cse6 (select .cse5 ~get2~0.base))) (or (<= (select (select .cse5 c_~get1~0.base) c_~get1~0.offset) (select .cse6 c_~get2~0.offset)) (not (< |c_thread1Thread1of1ForFork1_#t~mem4| (select .cse6 .cse3))))))))) is different from false [2022-12-05 21:16:55,395 INFO L321 Elim1Store]: treesize reduction 15, result has 79.5 percent of original size [2022-12-05 21:16:55,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 131 [2022-12-05 21:16:55,422 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:16:55,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 90 [2022-12-05 21:16:55,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-05 21:16:55,763 INFO L321 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-12-05 21:16:55,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 104 treesize of output 1 [2022-12-05 21:16:55,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:16:55,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867923085] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:16:55,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:16:55,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 31 [2022-12-05 21:16:55,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497585708] [2022-12-05 21:16:56,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:16:56,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-05 21:16:56,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:16:56,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-05 21:16:56,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=869, Unknown=1, NotChecked=60, Total=1056 [2022-12-05 21:16:56,000 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:16:56,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 785 transitions, 18370 flow. Second operand has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:16:56,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:16:56,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:16:56,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:17:02,096 INFO L130 PetriNetUnfolder]: 5943/10786 cut-off events. [2022-12-05 21:17:02,096 INFO L131 PetriNetUnfolder]: For 269766/269766 co-relation queries the response was YES. [2022-12-05 21:17:02,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102173 conditions, 10786 events. 5943/10786 cut-off events. For 269766/269766 co-relation queries the response was YES. Maximal size of possible extension queue 693. Compared 85118 event pairs, 1859 based on Foata normal form. 8/10794 useless extension candidates. Maximal degree in co-relation 102072. Up to 5597 conditions per place. [2022-12-05 21:17:02,295 INFO L137 encePairwiseOnDemand]: 12/25 looper letters, 705 selfloop transitions, 243 changer transitions 10/958 dead transitions. [2022-12-05 21:17:02,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 958 transitions, 23116 flow [2022-12-05 21:17:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-05 21:17:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-12-05 21:17:02,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 114 transitions. [2022-12-05 21:17:02,296 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.21714285714285714 [2022-12-05 21:17:02,296 INFO L175 Difference]: Start difference. First operand has 327 places, 785 transitions, 18370 flow. Second operand 21 states and 114 transitions. [2022-12-05 21:17:02,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 958 transitions, 23116 flow [2022-12-05 21:17:03,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 958 transitions, 22810 flow, removed 9 selfloop flow, removed 8 redundant places. [2022-12-05 21:17:03,729 INFO L231 Difference]: Finished difference. Result has 340 places, 827 transitions, 19672 flow [2022-12-05 21:17:03,729 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=18116, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=19672, PETRI_PLACES=340, PETRI_TRANSITIONS=827} [2022-12-05 21:17:03,730 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 315 predicate places. [2022-12-05 21:17:03,730 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 827 transitions, 19672 flow [2022-12-05 21:17:03,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:03,730 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:17:03,730 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:17:03,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-12-05 21:17:03,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-12-05 21:17:03,931 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:17:03,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:17:03,932 INFO L85 PathProgramCache]: Analyzing trace with hash 470681555, now seen corresponding path program 2 times [2022-12-05 21:17:03,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:17:03,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125143296] [2022-12-05 21:17:03,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:17:03,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:17:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:17:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:17:04,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:17:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125143296] [2022-12-05 21:17:04,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125143296] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:17:04,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741308129] [2022-12-05 21:17:04,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:17:04,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:17:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:17:04,300 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:17:04,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-12-05 21:17:04,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:17:04,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:17:04,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:17:04,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:17:04,848 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:17:04,848 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 113 treesize of output 78 [2022-12-05 21:17:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:17:04,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:17:04,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:17:04,966 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 117 treesize of output 81 [2022-12-05 21:17:06,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:17:06,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741308129] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:17:06,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:17:06,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-05 21:17:06,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569500189] [2022-12-05 21:17:06,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:17:06,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-05 21:17:06,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:17:06,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-05 21:17:06,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2022-12-05 21:17:06,168 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:17:06,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 827 transitions, 19672 flow. Second operand has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:06,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:17:06,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:17:06,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:17:11,231 INFO L130 PetriNetUnfolder]: 5162/10180 cut-off events. [2022-12-05 21:17:11,232 INFO L131 PetriNetUnfolder]: For 242550/242591 co-relation queries the response was YES. [2022-12-05 21:17:11,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95705 conditions, 10180 events. 5162/10180 cut-off events. For 242550/242591 co-relation queries the response was YES. Maximal size of possible extension queue 738. Compared 88214 event pairs, 522 based on Foata normal form. 403/10578 useless extension candidates. Maximal degree in co-relation 95605. Up to 2015 conditions per place. [2022-12-05 21:17:11,453 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 679 selfloop transitions, 450 changer transitions 36/1179 dead transitions. [2022-12-05 21:17:11,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1179 transitions, 28063 flow [2022-12-05 21:17:11,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-05 21:17:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-05 21:17:11,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 220 transitions. [2022-12-05 21:17:11,455 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32592592592592595 [2022-12-05 21:17:11,455 INFO L175 Difference]: Start difference. First operand has 340 places, 827 transitions, 19672 flow. Second operand 27 states and 220 transitions. [2022-12-05 21:17:11,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1179 transitions, 28063 flow [2022-12-05 21:17:12,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 1179 transitions, 27668 flow, removed 50 selfloop flow, removed 16 redundant places. [2022-12-05 21:17:12,914 INFO L231 Difference]: Finished difference. Result has 348 places, 885 transitions, 21948 flow [2022-12-05 21:17:12,915 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=19289, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=825, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=388, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=21948, PETRI_PLACES=348, PETRI_TRANSITIONS=885} [2022-12-05 21:17:12,915 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 323 predicate places. [2022-12-05 21:17:12,915 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 885 transitions, 21948 flow [2022-12-05 21:17:12,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:12,915 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:17:12,915 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:17:12,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-12-05 21:17:13,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-05 21:17:13,116 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:17:13,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:17:13,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1789200653, now seen corresponding path program 3 times [2022-12-05 21:17:13,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:17:13,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882424971] [2022-12-05 21:17:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:17:13,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:17:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:17:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:17:13,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:17:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882424971] [2022-12-05 21:17:13,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882424971] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:17:13,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834635057] [2022-12-05 21:17:13,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:17:13,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:17:13,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:17:13,424 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:17:13,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-12-05 21:17:13,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:17:13,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:17:13,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:17:13,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:17:13,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:17:13,985 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 113 treesize of output 78 [2022-12-05 21:17:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:17:14,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:17:14,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:17:14,117 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 117 treesize of output 81 [2022-12-05 21:17:14,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:17:14,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834635057] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:17:14,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:17:14,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-05 21:17:14,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024007381] [2022-12-05 21:17:14,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:17:14,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-05 21:17:14,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:17:14,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-05 21:17:14,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2022-12-05 21:17:14,819 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:17:14,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 885 transitions, 21948 flow. Second operand has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:14,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:17:14,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:17:14,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:17:19,175 INFO L130 PetriNetUnfolder]: 5135/10171 cut-off events. [2022-12-05 21:17:19,175 INFO L131 PetriNetUnfolder]: For 273823/273863 co-relation queries the response was YES. [2022-12-05 21:17:19,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99537 conditions, 10171 events. 5135/10171 cut-off events. For 273823/273863 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 88570 event pairs, 777 based on Foata normal form. 29/10194 useless extension candidates. Maximal degree in co-relation 99432. Up to 2172 conditions per place. [2022-12-05 21:17:19,304 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 763 selfloop transitions, 279 changer transitions 37/1093 dead transitions. [2022-12-05 21:17:19,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1093 transitions, 27534 flow [2022-12-05 21:17:19,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 21:17:19,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 21:17:19,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 165 transitions. [2022-12-05 21:17:19,305 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3 [2022-12-05 21:17:19,306 INFO L175 Difference]: Start difference. First operand has 348 places, 885 transitions, 21948 flow. Second operand 22 states and 165 transitions. [2022-12-05 21:17:19,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1093 transitions, 27534 flow [2022-12-05 21:17:21,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1093 transitions, 27038 flow, removed 218 selfloop flow, removed 9 redundant places. [2022-12-05 21:17:21,680 INFO L231 Difference]: Finished difference. Result has 361 places, 880 transitions, 22009 flow [2022-12-05 21:17:21,681 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=21504, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=885, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=277, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=22009, PETRI_PLACES=361, PETRI_TRANSITIONS=880} [2022-12-05 21:17:21,682 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 336 predicate places. [2022-12-05 21:17:21,682 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 880 transitions, 22009 flow [2022-12-05 21:17:21,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:21,682 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:17:21,682 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:17:21,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-12-05 21:17:21,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-12-05 21:17:21,887 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:17:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:17:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1324251918, now seen corresponding path program 4 times [2022-12-05 21:17:21,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:17:21,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040516509] [2022-12-05 21:17:21,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:17:21,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:17:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:17:22,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:17:22,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:17:22,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040516509] [2022-12-05 21:17:22,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040516509] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:17:22,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199883980] [2022-12-05 21:17:22,193 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:17:22,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:17:22,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:17:22,195 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:17:22,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-12-05 21:17:22,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:17:22,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:17:22,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-05 21:17:22,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:17:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:17:22,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:17:22,903 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:17:22,904 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 117 treesize of output 81 [2022-12-05 21:17:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:17:24,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199883980] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:17:24,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:17:24,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-05 21:17:24,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128552165] [2022-12-05 21:17:24,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:17:24,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-05 21:17:24,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:17:24,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-05 21:17:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2022-12-05 21:17:24,047 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:17:24,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 880 transitions, 22009 flow. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:24,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:17:24,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:17:24,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:17:30,430 INFO L130 PetriNetUnfolder]: 6072/12019 cut-off events. [2022-12-05 21:17:30,430 INFO L131 PetriNetUnfolder]: For 320310/320378 co-relation queries the response was YES. [2022-12-05 21:17:30,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115934 conditions, 12019 events. 6072/12019 cut-off events. For 320310/320378 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 107008 event pairs, 1083 based on Foata normal form. 173/12188 useless extension candidates. Maximal degree in co-relation 115828. Up to 2862 conditions per place. [2022-12-05 21:17:30,587 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 907 selfloop transitions, 505 changer transitions 18/1444 dead transitions. [2022-12-05 21:17:30,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1444 transitions, 35932 flow [2022-12-05 21:17:30,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-05 21:17:30,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-05 21:17:30,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 249 transitions. [2022-12-05 21:17:30,589 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3018181818181818 [2022-12-05 21:17:30,589 INFO L175 Difference]: Start difference. First operand has 361 places, 880 transitions, 22009 flow. Second operand 33 states and 249 transitions. [2022-12-05 21:17:30,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1444 transitions, 35932 flow [2022-12-05 21:17:33,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 1444 transitions, 35403 flow, removed 33 selfloop flow, removed 15 redundant places. [2022-12-05 21:17:33,185 INFO L231 Difference]: Finished difference. Result has 385 places, 1026 transitions, 26620 flow [2022-12-05 21:17:33,186 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=21557, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=26620, PETRI_PLACES=385, PETRI_TRANSITIONS=1026} [2022-12-05 21:17:33,186 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 360 predicate places. [2022-12-05 21:17:33,186 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 1026 transitions, 26620 flow [2022-12-05 21:17:33,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:33,186 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:17:33,186 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:17:33,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-12-05 21:17:33,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:17:33,392 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:17:33,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:17:33,392 INFO L85 PathProgramCache]: Analyzing trace with hash 2105332699, now seen corresponding path program 1 times [2022-12-05 21:17:33,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:17:33,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485354999] [2022-12-05 21:17:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:17:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:17:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:17:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:17:33,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:17:33,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485354999] [2022-12-05 21:17:33,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485354999] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:17:33,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:17:33,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-05 21:17:33,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587628784] [2022-12-05 21:17:33,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:17:33,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:17:33,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:17:33,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:17:33,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:17:33,638 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:17:33,638 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 1026 transitions, 26620 flow. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:33,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:17:33,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:17:33,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:17:38,363 INFO L130 PetriNetUnfolder]: 6992/13238 cut-off events. [2022-12-05 21:17:38,363 INFO L131 PetriNetUnfolder]: For 374782/374782 co-relation queries the response was YES. [2022-12-05 21:17:38,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130798 conditions, 13238 events. 6992/13238 cut-off events. For 374782/374782 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 113758 event pairs, 2474 based on Foata normal form. 44/13282 useless extension candidates. Maximal degree in co-relation 130683. Up to 8872 conditions per place. [2022-12-05 21:17:38,548 INFO L137 encePairwiseOnDemand]: 16/25 looper letters, 878 selfloop transitions, 201 changer transitions 10/1089 dead transitions. [2022-12-05 21:17:38,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 1089 transitions, 30453 flow [2022-12-05 21:17:38,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:17:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:17:38,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 61 transitions. [2022-12-05 21:17:38,549 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.305 [2022-12-05 21:17:38,549 INFO L175 Difference]: Start difference. First operand has 385 places, 1026 transitions, 26620 flow. Second operand 8 states and 61 transitions. [2022-12-05 21:17:38,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 1089 transitions, 30453 flow [2022-12-05 21:17:42,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1089 transitions, 29721 flow, removed 76 selfloop flow, removed 22 redundant places. [2022-12-05 21:17:42,068 INFO L231 Difference]: Finished difference. Result has 369 places, 1054 transitions, 27349 flow [2022-12-05 21:17:42,069 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=25917, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=853, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=27349, PETRI_PLACES=369, PETRI_TRANSITIONS=1054} [2022-12-05 21:17:42,069 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 344 predicate places. [2022-12-05 21:17:42,069 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1054 transitions, 27349 flow [2022-12-05 21:17:42,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:42,069 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:17:42,070 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:17:42,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-12-05 21:17:42,070 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:17:42,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:17:42,070 INFO L85 PathProgramCache]: Analyzing trace with hash -198831748, now seen corresponding path program 5 times [2022-12-05 21:17:42,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:17:42,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2820113] [2022-12-05 21:17:42,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:17:42,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:17:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:17:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:17:42,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:17:42,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2820113] [2022-12-05 21:17:42,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2820113] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:17:42,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038005965] [2022-12-05 21:17:42,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:17:42,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:17:42,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:17:42,356 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:17:42,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-12-05 21:17:42,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:17:42,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:17:42,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:17:42,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:17:42,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:17:42,878 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 109 treesize of output 74 [2022-12-05 21:17:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:17:42,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:17:43,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:17:43,159 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 117 treesize of output 81 [2022-12-05 21:17:44,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:17:44,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038005965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:17:44,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:17:44,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-05 21:17:44,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737920526] [2022-12-05 21:17:44,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:17:44,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-05 21:17:44,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:17:44,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-05 21:17:44,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=982, Unknown=0, NotChecked=0, Total=1190 [2022-12-05 21:17:44,369 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:17:44,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1054 transitions, 27349 flow. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:44,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:17:44,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:17:44,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:17:51,102 INFO L130 PetriNetUnfolder]: 6151/12119 cut-off events. [2022-12-05 21:17:51,102 INFO L131 PetriNetUnfolder]: For 335170/335238 co-relation queries the response was YES. [2022-12-05 21:17:51,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120095 conditions, 12119 events. 6151/12119 cut-off events. For 335170/335238 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 107497 event pairs, 1097 based on Foata normal form. 27/12142 useless extension candidates. Maximal degree in co-relation 119982. Up to 2910 conditions per place. [2022-12-05 21:17:51,379 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 941 selfloop transitions, 504 changer transitions 12/1471 dead transitions. [2022-12-05 21:17:51,379 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1471 transitions, 38110 flow [2022-12-05 21:17:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-12-05 21:17:51,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-12-05 21:17:51,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 240 transitions. [2022-12-05 21:17:51,380 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2909090909090909 [2022-12-05 21:17:51,380 INFO L175 Difference]: Start difference. First operand has 369 places, 1054 transitions, 27349 flow. Second operand 33 states and 240 transitions. [2022-12-05 21:17:51,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1471 transitions, 38110 flow [2022-12-05 21:17:54,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1471 transitions, 37731 flow, removed 24 selfloop flow, removed 4 redundant places. [2022-12-05 21:17:54,512 INFO L231 Difference]: Finished difference. Result has 398 places, 1053 transitions, 28099 flow [2022-12-05 21:17:54,513 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=27077, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1054, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=503, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=28099, PETRI_PLACES=398, PETRI_TRANSITIONS=1053} [2022-12-05 21:17:54,513 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 373 predicate places. [2022-12-05 21:17:54,513 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 1053 transitions, 28099 flow [2022-12-05 21:17:54,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:54,513 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:17:54,513 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:17:54,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-12-05 21:17:54,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:17:54,719 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:17:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:17:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash -204630163, now seen corresponding path program 2 times [2022-12-05 21:17:54,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:17:54,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891036419] [2022-12-05 21:17:54,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:17:54,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:17:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:17:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:17:55,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:17:55,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891036419] [2022-12-05 21:17:55,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891036419] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:17:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158539584] [2022-12-05 21:17:55,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:17:55,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:17:55,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:17:55,006 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:17:55,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-12-05 21:17:55,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:17:55,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:17:55,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-05 21:17:55,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:17:55,244 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-05 21:17:55,244 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 26 treesize of output 10 [2022-12-05 21:17:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:17:55,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:17:55,361 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-05 21:17:55,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-05 21:17:55,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:17:55,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158539584] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:17:55,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:17:55,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 17 [2022-12-05 21:17:55,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729975389] [2022-12-05 21:17:55,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:17:55,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:17:55,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:17:55,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:17:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-12-05 21:17:55,386 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:17:55,386 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 1053 transitions, 28099 flow. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:17:55,386 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:17:55,386 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:17:55,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:18:00,336 INFO L130 PetriNetUnfolder]: 6849/12873 cut-off events. [2022-12-05 21:18:00,337 INFO L131 PetriNetUnfolder]: For 372123/372123 co-relation queries the response was YES. [2022-12-05 21:18:00,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128115 conditions, 12873 events. 6849/12873 cut-off events. For 372123/372123 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 108706 event pairs, 2388 based on Foata normal form. 52/12925 useless extension candidates. Maximal degree in co-relation 128000. Up to 8824 conditions per place. [2022-12-05 21:18:00,508 INFO L137 encePairwiseOnDemand]: 17/25 looper letters, 878 selfloop transitions, 159 changer transitions 28/1065 dead transitions. [2022-12-05 21:18:00,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1065 transitions, 30056 flow [2022-12-05 21:18:00,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:18:00,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:18:00,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 69 transitions. [2022-12-05 21:18:00,509 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.345 [2022-12-05 21:18:00,509 INFO L175 Difference]: Start difference. First operand has 398 places, 1053 transitions, 28099 flow. Second operand 8 states and 69 transitions. [2022-12-05 21:18:00,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1065 transitions, 30056 flow [2022-12-05 21:18:03,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1065 transitions, 29305 flow, removed 23 selfloop flow, removed 25 redundant places. [2022-12-05 21:18:03,766 INFO L231 Difference]: Finished difference. Result has 378 places, 1012 transitions, 26355 flow [2022-12-05 21:18:03,767 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=26613, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=870, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=26355, PETRI_PLACES=378, PETRI_TRANSITIONS=1012} [2022-12-05 21:18:03,767 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 353 predicate places. [2022-12-05 21:18:03,767 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1012 transitions, 26355 flow [2022-12-05 21:18:03,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:03,767 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:18:03,767 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:18:03,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-12-05 21:18:03,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:03,969 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:18:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:18:03,969 INFO L85 PathProgramCache]: Analyzing trace with hash -509503268, now seen corresponding path program 6 times [2022-12-05 21:18:03,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:18:03,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845551001] [2022-12-05 21:18:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:18:03,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:18:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:18:04,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:18:04,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:18:04,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845551001] [2022-12-05 21:18:04,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845551001] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:18:04,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004889206] [2022-12-05 21:18:04,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:18:04,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:18:04,252 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:18:04,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-12-05 21:18:04,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:18:04,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:18:04,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-05 21:18:04,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:18:04,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:18:04,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:18:04,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:18:04,927 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 117 treesize of output 81 [2022-12-05 21:18:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:18:05,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004889206] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:18:05,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:18:05,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-05 21:18:05,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186791638] [2022-12-05 21:18:05,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:18:05,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-05 21:18:05,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:18:05,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-05 21:18:05,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2022-12-05 21:18:05,736 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:18:05,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1012 transitions, 26355 flow. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:05,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:18:05,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:18:05,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:18:11,507 INFO L130 PetriNetUnfolder]: 6049/11877 cut-off events. [2022-12-05 21:18:11,507 INFO L131 PetriNetUnfolder]: For 339249/339303 co-relation queries the response was YES. [2022-12-05 21:18:11,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118529 conditions, 11877 events. 6049/11877 cut-off events. For 339249/339303 co-relation queries the response was YES. Maximal size of possible extension queue 829. Compared 104613 event pairs, 1198 based on Foata normal form. 29/11902 useless extension candidates. Maximal degree in co-relation 118415. Up to 2814 conditions per place. [2022-12-05 21:18:11,664 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 989 selfloop transitions, 324 changer transitions 32/1359 dead transitions. [2022-12-05 21:18:11,664 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1359 transitions, 35813 flow [2022-12-05 21:18:11,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-05 21:18:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-12-05 21:18:11,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 198 transitions. [2022-12-05 21:18:11,665 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.28285714285714286 [2022-12-05 21:18:11,665 INFO L175 Difference]: Start difference. First operand has 378 places, 1012 transitions, 26355 flow. Second operand 28 states and 198 transitions. [2022-12-05 21:18:11,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1359 transitions, 35813 flow [2022-12-05 21:18:14,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1359 transitions, 35277 flow, removed 6 selfloop flow, removed 6 redundant places. [2022-12-05 21:18:14,662 INFO L231 Difference]: Finished difference. Result has 400 places, 1008 transitions, 26537 flow [2022-12-05 21:18:14,663 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=25991, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1012, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=26537, PETRI_PLACES=400, PETRI_TRANSITIONS=1008} [2022-12-05 21:18:14,663 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 375 predicate places. [2022-12-05 21:18:14,663 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 1008 transitions, 26537 flow [2022-12-05 21:18:14,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:14,663 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:18:14,663 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:18:14,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-12-05 21:18:14,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-12-05 21:18:14,869 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:18:14,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:18:14,869 INFO L85 PathProgramCache]: Analyzing trace with hash 482840813, now seen corresponding path program 3 times [2022-12-05 21:18:14,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:18:14,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960045569] [2022-12-05 21:18:14,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:18:14,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:18:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:18:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:18:15,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:18:15,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960045569] [2022-12-05 21:18:15,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960045569] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:18:15,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828010012] [2022-12-05 21:18:15,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:18:15,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:15,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:18:15,136 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:18:15,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-12-05 21:18:15,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:18:15,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:18:15,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-05 21:18:15,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:18:15,468 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-05 21:18:15,468 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 26 treesize of output 10 [2022-12-05 21:18:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:18:15,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:18:15,545 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-05 21:18:15,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-05 21:18:15,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:18:15,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828010012] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:18:15,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:18:15,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2022-12-05 21:18:15,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103501773] [2022-12-05 21:18:15,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:18:15,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:18:15,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:18:15,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:18:15,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:18:15,583 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:18:15,583 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 1008 transitions, 26537 flow. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:15,583 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:18:15,583 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:18:15,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:18:20,347 INFO L130 PetriNetUnfolder]: 6854/12900 cut-off events. [2022-12-05 21:18:20,347 INFO L131 PetriNetUnfolder]: For 373954/373954 co-relation queries the response was YES. [2022-12-05 21:18:20,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129213 conditions, 12900 events. 6854/12900 cut-off events. For 373954/373954 co-relation queries the response was YES. Maximal size of possible extension queue 839. Compared 109531 event pairs, 2116 based on Foata normal form. 48/12948 useless extension candidates. Maximal degree in co-relation 129095. Up to 8794 conditions per place. [2022-12-05 21:18:20,523 INFO L137 encePairwiseOnDemand]: 16/25 looper letters, 864 selfloop transitions, 198 changer transitions 16/1078 dead transitions. [2022-12-05 21:18:20,523 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1078 transitions, 30551 flow [2022-12-05 21:18:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:18:20,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:18:20,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 69 transitions. [2022-12-05 21:18:20,524 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.30666666666666664 [2022-12-05 21:18:20,524 INFO L175 Difference]: Start difference. First operand has 400 places, 1008 transitions, 26537 flow. Second operand 9 states and 69 transitions. [2022-12-05 21:18:20,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1078 transitions, 30551 flow [2022-12-05 21:18:24,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1078 transitions, 30046 flow, removed 22 selfloop flow, removed 22 redundant places. [2022-12-05 21:18:24,031 INFO L231 Difference]: Finished difference. Result has 386 places, 1029 transitions, 27477 flow [2022-12-05 21:18:24,031 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=26003, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=828, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=27477, PETRI_PLACES=386, PETRI_TRANSITIONS=1029} [2022-12-05 21:18:24,032 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 361 predicate places. [2022-12-05 21:18:24,032 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1029 transitions, 27477 flow [2022-12-05 21:18:24,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:24,032 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:18:24,032 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:18:24,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-12-05 21:18:24,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-12-05 21:18:24,232 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:18:24,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:18:24,233 INFO L85 PathProgramCache]: Analyzing trace with hash 530143646, now seen corresponding path program 7 times [2022-12-05 21:18:24,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:18:24,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417138469] [2022-12-05 21:18:24,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:18:24,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:18:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:18:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:18:24,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:18:24,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417138469] [2022-12-05 21:18:24,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417138469] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:18:24,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438620608] [2022-12-05 21:18:24,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:18:24,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:24,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:18:24,539 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:18:24,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-12-05 21:18:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:18:24,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:18:24,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:18:25,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:18:25,167 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 113 treesize of output 78 [2022-12-05 21:18:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:18:25,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:18:25,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:18:25,294 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 117 treesize of output 81 [2022-12-05 21:18:26,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:18:26,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438620608] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:18:26,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:18:26,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-05 21:18:26,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534821900] [2022-12-05 21:18:26,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:18:26,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-05 21:18:26,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:18:26,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-05 21:18:26,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2022-12-05 21:18:26,274 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:18:26,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1029 transitions, 27477 flow. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:26,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:18:26,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:18:26,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:18:32,193 INFO L130 PetriNetUnfolder]: 6012/11778 cut-off events. [2022-12-05 21:18:32,194 INFO L131 PetriNetUnfolder]: For 342047/342098 co-relation queries the response was YES. [2022-12-05 21:18:32,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120150 conditions, 11778 events. 6012/11778 cut-off events. For 342047/342098 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 103340 event pairs, 1085 based on Foata normal form. 27/11801 useless extension candidates. Maximal degree in co-relation 120031. Up to 2848 conditions per place. [2022-12-05 21:18:32,365 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 942 selfloop transitions, 410 changer transitions 39/1405 dead transitions. [2022-12-05 21:18:32,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 1405 transitions, 37721 flow [2022-12-05 21:18:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-05 21:18:32,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-12-05 21:18:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 214 transitions. [2022-12-05 21:18:32,366 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.29517241379310344 [2022-12-05 21:18:32,366 INFO L175 Difference]: Start difference. First operand has 386 places, 1029 transitions, 27477 flow. Second operand 29 states and 214 transitions. [2022-12-05 21:18:32,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 1405 transitions, 37721 flow [2022-12-05 21:18:35,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1405 transitions, 37350 flow, removed 61 selfloop flow, removed 5 redundant places. [2022-12-05 21:18:35,403 INFO L231 Difference]: Finished difference. Result has 409 places, 1009 transitions, 27505 flow [2022-12-05 21:18:35,403 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=27204, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=27505, PETRI_PLACES=409, PETRI_TRANSITIONS=1009} [2022-12-05 21:18:35,404 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 384 predicate places. [2022-12-05 21:18:35,404 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 1009 transitions, 27505 flow [2022-12-05 21:18:35,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:35,404 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:18:35,404 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:18:35,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-12-05 21:18:35,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:35,605 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:18:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:18:35,605 INFO L85 PathProgramCache]: Analyzing trace with hash -133734211, now seen corresponding path program 4 times [2022-12-05 21:18:35,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:18:35,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146161639] [2022-12-05 21:18:35,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:18:35,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:18:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:18:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:18:35,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:18:35,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146161639] [2022-12-05 21:18:35,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146161639] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:18:35,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754609722] [2022-12-05 21:18:35,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:18:35,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:35,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:18:35,876 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:18:35,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-12-05 21:18:36,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:18:36,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:18:36,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-05 21:18:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:18:36,072 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-05 21:18:36,072 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 26 treesize of output 10 [2022-12-05 21:18:36,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:18:36,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:18:36,195 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-12-05 21:18:36,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-12-05 21:18:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:18:36,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754609722] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:18:36,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:18:36,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 7] total 18 [2022-12-05 21:18:36,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265856771] [2022-12-05 21:18:36,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:18:36,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:18:36,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:18:36,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:18:36,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2022-12-05 21:18:36,213 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:18:36,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1009 transitions, 27505 flow. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:36,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:18:36,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:18:36,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:18:41,532 INFO L130 PetriNetUnfolder]: 6661/12529 cut-off events. [2022-12-05 21:18:41,533 INFO L131 PetriNetUnfolder]: For 372030/372030 co-relation queries the response was YES. [2022-12-05 21:18:41,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127459 conditions, 12529 events. 6661/12529 cut-off events. For 372030/372030 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 105591 event pairs, 2378 based on Foata normal form. 52/12581 useless extension candidates. Maximal degree in co-relation 127340. Up to 8577 conditions per place. [2022-12-05 21:18:41,787 INFO L137 encePairwiseOnDemand]: 17/25 looper letters, 825 selfloop transitions, 169 changer transitions 19/1013 dead transitions. [2022-12-05 21:18:41,788 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1013 transitions, 29341 flow [2022-12-05 21:18:41,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:18:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:18:41,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 57 transitions. [2022-12-05 21:18:41,792 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32571428571428573 [2022-12-05 21:18:41,792 INFO L175 Difference]: Start difference. First operand has 409 places, 1009 transitions, 27505 flow. Second operand 7 states and 57 transitions. [2022-12-05 21:18:41,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1013 transitions, 29341 flow [2022-12-05 21:18:44,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1013 transitions, 28716 flow, removed 18 selfloop flow, removed 25 redundant places. [2022-12-05 21:18:44,989 INFO L231 Difference]: Finished difference. Result has 384 places, 984 transitions, 26455 flow [2022-12-05 21:18:44,990 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=26402, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=824, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26455, PETRI_PLACES=384, PETRI_TRANSITIONS=984} [2022-12-05 21:18:44,990 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 359 predicate places. [2022-12-05 21:18:44,990 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 984 transitions, 26455 flow [2022-12-05 21:18:44,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:44,990 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:18:44,990 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:18:44,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-12-05 21:18:45,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:45,196 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:18:45,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:18:45,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1509492959, now seen corresponding path program 8 times [2022-12-05 21:18:45,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:18:45,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742274965] [2022-12-05 21:18:45,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:18:45,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:18:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:18:45,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:18:45,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:18:45,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742274965] [2022-12-05 21:18:45,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742274965] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:18:45,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277536742] [2022-12-05 21:18:45,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-05 21:18:45,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:45,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:18:45,475 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:18:45,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-12-05 21:18:45,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:18:45,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:18:45,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-05 21:18:45,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:18:46,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:18:46,169 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 113 treesize of output 78 [2022-12-05 21:18:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:18:46,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:18:46,317 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:18:46,317 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 117 treesize of output 81 [2022-12-05 21:18:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:18:47,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277536742] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:18:47,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:18:47,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2022-12-05 21:18:47,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780847579] [2022-12-05 21:18:47,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:18:47,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-05 21:18:47,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:18:47,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-05 21:18:47,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=801, Unknown=0, NotChecked=0, Total=992 [2022-12-05 21:18:47,303 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:18:47,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 984 transitions, 26455 flow. Second operand has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:47,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:18:47,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:18:47,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:18:52,551 INFO L130 PetriNetUnfolder]: 5837/11376 cut-off events. [2022-12-05 21:18:52,552 INFO L131 PetriNetUnfolder]: For 320928/320965 co-relation queries the response was YES. [2022-12-05 21:18:52,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117189 conditions, 11376 events. 5837/11376 cut-off events. For 320928/320965 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 98645 event pairs, 749 based on Foata normal form. 34/11407 useless extension candidates. Maximal degree in co-relation 117073. Up to 2305 conditions per place. [2022-12-05 21:18:52,709 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 757 selfloop transitions, 386 changer transitions 48/1204 dead transitions. [2022-12-05 21:18:52,709 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 1204 transitions, 32620 flow [2022-12-05 21:18:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-05 21:18:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-12-05 21:18:52,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 175 transitions. [2022-12-05 21:18:52,711 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3181818181818182 [2022-12-05 21:18:52,711 INFO L175 Difference]: Start difference. First operand has 384 places, 984 transitions, 26455 flow. Second operand 22 states and 175 transitions. [2022-12-05 21:18:52,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 1204 transitions, 32620 flow [2022-12-05 21:18:55,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1204 transitions, 32214 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-05 21:18:55,414 INFO L231 Difference]: Finished difference. Result has 400 places, 955 transitions, 26060 flow [2022-12-05 21:18:55,415 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=26117, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=984, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=386, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=26060, PETRI_PLACES=400, PETRI_TRANSITIONS=955} [2022-12-05 21:18:55,415 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 375 predicate places. [2022-12-05 21:18:55,415 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 955 transitions, 26060 flow [2022-12-05 21:18:55,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.96875) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:55,415 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:18:55,415 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:18:55,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-12-05 21:18:55,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-12-05 21:18:55,616 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:18:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:18:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash -611250775, now seen corresponding path program 5 times [2022-12-05 21:18:55,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:18:55,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942783893] [2022-12-05 21:18:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:18:55,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:18:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:18:55,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:18:55,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:18:55,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942783893] [2022-12-05 21:18:55,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942783893] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:18:55,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884242780] [2022-12-05 21:18:55,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:18:55,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:18:55,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:18:55,888 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:18:55,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-12-05 21:18:56,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:18:56,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:18:56,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-05 21:18:56,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:18:56,132 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 [2022-12-05 21:18:56,164 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 [2022-12-05 21:18:56,195 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 [2022-12-05 21:18:56,262 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-05 21:18:56,263 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 26 treesize of output 10 [2022-12-05 21:18:56,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:18:56,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:18:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:18:56,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884242780] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:18:56,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:18:56,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 7] total 20 [2022-12-05 21:18:56,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688501947] [2022-12-05 21:18:56,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:18:56,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-05 21:18:56,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:18:56,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-05 21:18:56,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-12-05 21:18:56,361 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:18:56,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 955 transitions, 26060 flow. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:18:56,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:18:56,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:18:56,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:00,902 INFO L130 PetriNetUnfolder]: 6337/11841 cut-off events. [2022-12-05 21:19:00,903 INFO L131 PetriNetUnfolder]: For 353097/353097 co-relation queries the response was YES. [2022-12-05 21:19:01,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120963 conditions, 11841 events. 6337/11841 cut-off events. For 353097/353097 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 97713 event pairs, 2237 based on Foata normal form. 44/11885 useless extension candidates. Maximal degree in co-relation 120845. Up to 8105 conditions per place. [2022-12-05 21:19:01,076 INFO L137 encePairwiseOnDemand]: 14/25 looper letters, 753 selfloop transitions, 208 changer transitions 12/973 dead transitions. [2022-12-05 21:19:01,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 973 transitions, 28242 flow [2022-12-05 21:19:01,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:19:01,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:19:01,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 63 transitions. [2022-12-05 21:19:01,077 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.28 [2022-12-05 21:19:01,077 INFO L175 Difference]: Start difference. First operand has 400 places, 955 transitions, 26060 flow. Second operand 9 states and 63 transitions. [2022-12-05 21:19:01,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 973 transitions, 28242 flow [2022-12-05 21:19:03,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 973 transitions, 27602 flow, removed 9 selfloop flow, removed 19 redundant places. [2022-12-05 21:19:03,922 INFO L231 Difference]: Finished difference. Result has 387 places, 943 transitions, 25570 flow [2022-12-05 21:19:03,923 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=25056, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=25570, PETRI_PLACES=387, PETRI_TRANSITIONS=943} [2022-12-05 21:19:03,923 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 362 predicate places. [2022-12-05 21:19:03,923 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 943 transitions, 25570 flow [2022-12-05 21:19:03,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:03,923 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:03,924 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:03,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-12-05 21:19:04,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-05 21:19:04,124 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:19:04,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:04,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1610222691, now seen corresponding path program 9 times [2022-12-05 21:19:04,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:04,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084597093] [2022-12-05 21:19:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:04,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:04,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:04,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:04,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084597093] [2022-12-05 21:19:04,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084597093] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:04,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052324051] [2022-12-05 21:19:04,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:19:04,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:04,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:04,470 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:19:04,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-12-05 21:19:04,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-05 21:19:04,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:19:04,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-05 21:19:04,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:05,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:19:05,097 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 109 treesize of output 74 [2022-12-05 21:19:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:05,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:05,380 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:19:05,381 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 117 treesize of output 81 [2022-12-05 21:19:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:06,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052324051] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:19:06,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:19:06,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 31 [2022-12-05 21:19:06,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350889112] [2022-12-05 21:19:06,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:19:06,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-05 21:19:06,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:06,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-05 21:19:06,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2022-12-05 21:19:06,290 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:19:06,290 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 943 transitions, 25570 flow. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:06,290 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:06,290 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:19:06,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:12,264 INFO L130 PetriNetUnfolder]: 6264/11672 cut-off events. [2022-12-05 21:19:12,265 INFO L131 PetriNetUnfolder]: For 317527/317527 co-relation queries the response was YES. [2022-12-05 21:19:12,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118091 conditions, 11672 events. 6264/11672 cut-off events. For 317527/317527 co-relation queries the response was YES. Maximal size of possible extension queue 701. Compared 95356 event pairs, 826 based on Foata normal form. 14/11686 useless extension candidates. Maximal degree in co-relation 117974. Up to 2351 conditions per place. [2022-12-05 21:19:12,431 INFO L137 encePairwiseOnDemand]: 12/25 looper letters, 739 selfloop transitions, 460 changer transitions 11/1210 dead transitions. [2022-12-05 21:19:12,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1210 transitions, 32088 flow [2022-12-05 21:19:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-05 21:19:12,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-12-05 21:19:12,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 194 transitions. [2022-12-05 21:19:12,432 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.2874074074074074 [2022-12-05 21:19:12,432 INFO L175 Difference]: Start difference. First operand has 387 places, 943 transitions, 25570 flow. Second operand 27 states and 194 transitions. [2022-12-05 21:19:12,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1210 transitions, 32088 flow [2022-12-05 21:19:15,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1210 transitions, 31656 flow, removed 26 selfloop flow, removed 7 redundant places. [2022-12-05 21:19:15,305 INFO L231 Difference]: Finished difference. Result has 406 places, 946 transitions, 26126 flow [2022-12-05 21:19:15,306 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=25150, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=943, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=26126, PETRI_PLACES=406, PETRI_TRANSITIONS=946} [2022-12-05 21:19:15,306 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 381 predicate places. [2022-12-05 21:19:15,306 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 946 transitions, 26126 flow [2022-12-05 21:19:15,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:15,307 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:15,307 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:15,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-12-05 21:19:15,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:15,508 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:19:15,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:15,508 INFO L85 PathProgramCache]: Analyzing trace with hash 598857293, now seen corresponding path program 6 times [2022-12-05 21:19:15,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:15,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168920401] [2022-12-05 21:19:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:15,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:15,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:15,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:15,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168920401] [2022-12-05 21:19:15,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168920401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:15,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709692475] [2022-12-05 21:19:15,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-05 21:19:15,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:15,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:15,777 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:19:15,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-12-05 21:19:15,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-12-05 21:19:15,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:19:15,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-05 21:19:15,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:16,022 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-05 21:19:16,022 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 26 treesize of output 10 [2022-12-05 21:19:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:16,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:16,112 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-05 21:19:16,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-05 21:19:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:16,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709692475] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:16,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:19:16,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 9] total 16 [2022-12-05 21:19:16,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579088004] [2022-12-05 21:19:16,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:19:16,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:19:16,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:16,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:19:16,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:19:16,145 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:19:16,145 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 946 transitions, 26126 flow. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:16,145 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:16,145 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:19:16,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:20,037 INFO L130 PetriNetUnfolder]: 6040/11126 cut-off events. [2022-12-05 21:19:20,038 INFO L131 PetriNetUnfolder]: For 339470/339470 co-relation queries the response was YES. [2022-12-05 21:19:20,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115684 conditions, 11126 events. 6040/11126 cut-off events. For 339470/339470 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 89433 event pairs, 2139 based on Foata normal form. 52/11178 useless extension candidates. Maximal degree in co-relation 115567. Up to 8011 conditions per place. [2022-12-05 21:19:20,189 INFO L137 encePairwiseOnDemand]: 18/25 looper letters, 734 selfloop transitions, 178 changer transitions 19/931 dead transitions. [2022-12-05 21:19:20,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 931 transitions, 27224 flow [2022-12-05 21:19:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:19:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:19:20,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 57 transitions. [2022-12-05 21:19:20,189 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.32571428571428573 [2022-12-05 21:19:20,190 INFO L175 Difference]: Start difference. First operand has 406 places, 946 transitions, 26126 flow. Second operand 7 states and 57 transitions. [2022-12-05 21:19:20,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 931 transitions, 27224 flow [2022-12-05 21:19:22,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 931 transitions, 26158 flow, removed 96 selfloop flow, removed 25 redundant places. [2022-12-05 21:19:22,687 INFO L231 Difference]: Finished difference. Result has 383 places, 902 transitions, 24177 flow [2022-12-05 21:19:22,688 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=24236, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24177, PETRI_PLACES=383, PETRI_TRANSITIONS=902} [2022-12-05 21:19:22,688 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 358 predicate places. [2022-12-05 21:19:22,688 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 902 transitions, 24177 flow [2022-12-05 21:19:22,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:22,688 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:22,688 INFO L213 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:22,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-12-05 21:19:22,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-12-05 21:19:22,889 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:19:22,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:22,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1899430350, now seen corresponding path program 10 times [2022-12-05 21:19:22,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:22,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900119855] [2022-12-05 21:19:22,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:22,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:19:23,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:23,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900119855] [2022-12-05 21:19:23,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900119855] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026917466] [2022-12-05 21:19:23,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-05 21:19:23,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:23,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:23,174 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:19:23,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-12-05 21:19:23,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-05 21:19:23,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:19:23,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-05 21:19:23,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:19:23,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:23,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:19:23,842 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 117 treesize of output 81 [2022-12-05 21:19:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:19:24,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026917466] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:19:24,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:19:24,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2022-12-05 21:19:24,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617422611] [2022-12-05 21:19:24,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:19:24,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-05 21:19:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-05 21:19:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-12-05 21:19:24,879 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 1 out of 25 [2022-12-05 21:19:24,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 902 transitions, 24177 flow. Second operand has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:24,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:24,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 1 of 25 [2022-12-05 21:19:24,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:30,261 INFO L130 PetriNetUnfolder]: 5146/10013 cut-off events. [2022-12-05 21:19:30,261 INFO L131 PetriNetUnfolder]: For 279677/279734 co-relation queries the response was YES. [2022-12-05 21:19:30,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102182 conditions, 10013 events. 5146/10013 cut-off events. For 279677/279734 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 84674 event pairs, 887 based on Foata normal form. 185/10192 useless extension candidates. Maximal degree in co-relation 102070. Up to 2112 conditions per place. [2022-12-05 21:19:30,402 INFO L137 encePairwiseOnDemand]: 13/25 looper letters, 813 selfloop transitions, 460 changer transitions 25/1310 dead transitions. [2022-12-05 21:19:30,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1310 transitions, 34229 flow [2022-12-05 21:19:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-12-05 21:19:30,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-12-05 21:19:30,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 245 transitions. [2022-12-05 21:19:30,403 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.28823529411764703 [2022-12-05 21:19:30,404 INFO L175 Difference]: Start difference. First operand has 383 places, 902 transitions, 24177 flow. Second operand 34 states and 245 transitions. [2022-12-05 21:19:30,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1310 transitions, 34229 flow [2022-12-05 21:19:32,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 1310 transitions, 33653 flow, removed 58 selfloop flow, removed 6 redundant places. [2022-12-05 21:19:32,559 INFO L231 Difference]: Finished difference. Result has 419 places, 948 transitions, 25922 flow [2022-12-05 21:19:32,560 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=23705, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=901, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=406, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=25922, PETRI_PLACES=419, PETRI_TRANSITIONS=948} [2022-12-05 21:19:32,561 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 394 predicate places. [2022-12-05 21:19:32,561 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 948 transitions, 25922 flow [2022-12-05 21:19:32,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8) internal successors, (98), 35 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:32,561 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:32,561 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:32,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-12-05 21:19:32,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:32,768 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:19:32,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:32,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1303824371, now seen corresponding path program 7 times [2022-12-05 21:19:32,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:32,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96097438] [2022-12-05 21:19:32,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:32,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:32,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:32,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:32,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96097438] [2022-12-05 21:19:32,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96097438] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:32,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509878785] [2022-12-05 21:19:32,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-05 21:19:32,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:32,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:32,999 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:19:33,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-12-05 21:19:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:33,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 56 conjunts are in the unsatisfiable core [2022-12-05 21:19:33,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:33,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:19:33,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:19:33,183 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-05 21:19:33,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 16 [2022-12-05 21:19:33,227 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 [2022-12-05 21:19:33,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:19:33,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:19:33,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:19:33,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:19:33,269 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-12-05 21:19:33,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 17 [2022-12-05 21:19:33,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-05 21:19:33,346 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 [2022-12-05 21:19:33,392 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 [2022-12-05 21:19:33,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-12-05 21:19:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-05 21:19:33,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:33,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509878785] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:33,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-05 21:19:33,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 12] total 25 [2022-12-05 21:19:33,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098537399] [2022-12-05 21:19:33,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:19:33,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-05 21:19:33,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:33,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-05 21:19:33,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-12-05 21:19:33,663 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:19:33,663 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 948 transitions, 25922 flow. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:33,663 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:33,663 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:19:33,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:37,702 INFO L130 PetriNetUnfolder]: 5821/10814 cut-off events. [2022-12-05 21:19:37,702 INFO L131 PetriNetUnfolder]: For 289236/289236 co-relation queries the response was YES. [2022-12-05 21:19:37,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111916 conditions, 10814 events. 5821/10814 cut-off events. For 289236/289236 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 86572 event pairs, 520 based on Foata normal form. 22/10836 useless extension candidates. Maximal degree in co-relation 111792. Up to 6156 conditions per place. [2022-12-05 21:19:37,859 INFO L137 encePairwiseOnDemand]: 16/25 looper letters, 599 selfloop transitions, 377 changer transitions 25/1001 dead transitions. [2022-12-05 21:19:37,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 1001 transitions, 28903 flow [2022-12-05 21:19:37,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-05 21:19:37,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-05 21:19:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 58 transitions. [2022-12-05 21:19:37,860 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.3314285714285714 [2022-12-05 21:19:37,860 INFO L175 Difference]: Start difference. First operand has 419 places, 948 transitions, 25922 flow. Second operand 7 states and 58 transitions. [2022-12-05 21:19:37,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 1001 transitions, 28903 flow [2022-12-05 21:19:40,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 1001 transitions, 28363 flow, removed 101 selfloop flow, removed 18 redundant places. [2022-12-05 21:19:40,891 INFO L231 Difference]: Finished difference. Result has 404 places, 924 transitions, 25510 flow [2022-12-05 21:19:40,891 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=24845, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=25510, PETRI_PLACES=404, PETRI_TRANSITIONS=924} [2022-12-05 21:19:40,892 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 379 predicate places. [2022-12-05 21:19:40,892 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 924 transitions, 25510 flow [2022-12-05 21:19:40,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:40,892 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:40,892 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:40,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-12-05 21:19:41,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:41,093 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:19:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:41,093 INFO L85 PathProgramCache]: Analyzing trace with hash 684668745, now seen corresponding path program 8 times [2022-12-05 21:19:41,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:41,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877821896] [2022-12-05 21:19:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:41,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:41,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:41,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877821896] [2022-12-05 21:19:41,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877821896] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:19:41,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:19:41,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-05 21:19:41,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358645641] [2022-12-05 21:19:41,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:19:41,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:19:41,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:41,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:19:41,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:19:41,334 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:19:41,334 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 924 transitions, 25510 flow. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:41,334 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:41,334 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:19:41,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:45,433 INFO L130 PetriNetUnfolder]: 5820/10839 cut-off events. [2022-12-05 21:19:45,433 INFO L131 PetriNetUnfolder]: For 315523/315523 co-relation queries the response was YES. [2022-12-05 21:19:45,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113560 conditions, 10839 events. 5820/10839 cut-off events. For 315523/315523 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 87543 event pairs, 1690 based on Foata normal form. 36/10875 useless extension candidates. Maximal degree in co-relation 113437. Up to 8011 conditions per place. [2022-12-05 21:19:45,670 INFO L137 encePairwiseOnDemand]: 17/25 looper letters, 564 selfloop transitions, 385 changer transitions 13/962 dead transitions. [2022-12-05 21:19:45,670 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 962 transitions, 28227 flow [2022-12-05 21:19:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:19:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:19:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 51 transitions. [2022-12-05 21:19:45,671 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.255 [2022-12-05 21:19:45,671 INFO L175 Difference]: Start difference. First operand has 404 places, 924 transitions, 25510 flow. Second operand 8 states and 51 transitions. [2022-12-05 21:19:45,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 962 transitions, 28227 flow [2022-12-05 21:19:48,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 962 transitions, 27373 flow, removed 16 selfloop flow, removed 6 redundant places. [2022-12-05 21:19:48,384 INFO L231 Difference]: Finished difference. Result has 404 places, 928 transitions, 25651 flow [2022-12-05 21:19:48,384 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=24664, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=25651, PETRI_PLACES=404, PETRI_TRANSITIONS=928} [2022-12-05 21:19:48,384 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 379 predicate places. [2022-12-05 21:19:48,385 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 928 transitions, 25651 flow [2022-12-05 21:19:48,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:48,385 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:48,385 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:48,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-12-05 21:19:48,385 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:19:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:48,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1945352411, now seen corresponding path program 9 times [2022-12-05 21:19:48,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:48,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905442632] [2022-12-05 21:19:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:48,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:48,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:48,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905442632] [2022-12-05 21:19:48,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905442632] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:19:48,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414485623] [2022-12-05 21:19:48,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-05 21:19:48,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:19:48,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:19:48,604 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:19:48,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-12-05 21:19:48,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-05 21:19:48,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:19:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 21 conjunts are in the unsatisfiable core [2022-12-05 21:19:48,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:19:48,876 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-05 21:19:48,876 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 26 treesize of output 10 [2022-12-05 21:19:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:48,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:19:48,956 INFO L321 Elim1Store]: treesize reduction 32, result has 62.4 percent of original size [2022-12-05 21:19:48,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 60 [2022-12-05 21:19:48,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:48,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414485623] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:19:48,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:19:48,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2022-12-05 21:19:48,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082758429] [2022-12-05 21:19:48,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:19:48,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-05 21:19:48,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:48,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-05 21:19:48,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-12-05 21:19:48,991 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:19:48,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 928 transitions, 25651 flow. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:48,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:48,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:19:48,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:19:52,992 INFO L130 PetriNetUnfolder]: 5691/10626 cut-off events. [2022-12-05 21:19:52,992 INFO L131 PetriNetUnfolder]: For 298758/298758 co-relation queries the response was YES. [2022-12-05 21:19:53,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111274 conditions, 10626 events. 5691/10626 cut-off events. For 298758/298758 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 85707 event pairs, 1620 based on Foata normal form. 22/10648 useless extension candidates. Maximal degree in co-relation 111153. Up to 7522 conditions per place. [2022-12-05 21:19:53,143 INFO L137 encePairwiseOnDemand]: 16/25 looper letters, 541 selfloop transitions, 384 changer transitions 14/939 dead transitions. [2022-12-05 21:19:53,143 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 939 transitions, 27415 flow [2022-12-05 21:19:53,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-05 21:19:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-12-05 21:19:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 60 transitions. [2022-12-05 21:19:53,144 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.26666666666666666 [2022-12-05 21:19:53,144 INFO L175 Difference]: Start difference. First operand has 404 places, 928 transitions, 25651 flow. Second operand 9 states and 60 transitions. [2022-12-05 21:19:53,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 939 transitions, 27415 flow [2022-12-05 21:19:55,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 939 transitions, 26618 flow, removed 26 selfloop flow, removed 7 redundant places. [2022-12-05 21:19:55,697 INFO L231 Difference]: Finished difference. Result has 402 places, 899 transitions, 24758 flow [2022-12-05 21:19:55,697 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=24238, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24758, PETRI_PLACES=402, PETRI_TRANSITIONS=899} [2022-12-05 21:19:55,698 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 377 predicate places. [2022-12-05 21:19:55,698 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 899 transitions, 24758 flow [2022-12-05 21:19:55,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:55,698 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:19:55,698 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:19:55,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-12-05 21:19:55,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-12-05 21:19:55,899 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:19:55,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:19:55,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1894776813, now seen corresponding path program 10 times [2022-12-05 21:19:55,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:19:55,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995791207] [2022-12-05 21:19:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:19:55,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:19:55,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:19:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-05 21:19:56,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:19:56,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995791207] [2022-12-05 21:19:56,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995791207] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-05 21:19:56,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-05 21:19:56,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-05 21:19:56,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011527615] [2022-12-05 21:19:56,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-05 21:19:56,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-05 21:19:56,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:19:56,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-05 21:19:56,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-12-05 21:19:56,161 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:19:56,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 899 transitions, 24758 flow. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:19:56,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:19:56,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:19:56,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-05 21:20:00,058 INFO L130 PetriNetUnfolder]: 5552/10357 cut-off events. [2022-12-05 21:20:00,058 INFO L131 PetriNetUnfolder]: For 289040/289040 co-relation queries the response was YES. [2022-12-05 21:20:00,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108097 conditions, 10357 events. 5552/10357 cut-off events. For 289040/289040 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 82986 event pairs, 1648 based on Foata normal form. 36/10393 useless extension candidates. Maximal degree in co-relation 107978. Up to 7685 conditions per place. [2022-12-05 21:20:00,197 INFO L137 encePairwiseOnDemand]: 17/25 looper letters, 510 selfloop transitions, 364 changer transitions 19/893 dead transitions. [2022-12-05 21:20:00,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 893 transitions, 26054 flow [2022-12-05 21:20:00,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-05 21:20:00,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-12-05 21:20:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 47 transitions. [2022-12-05 21:20:00,198 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.235 [2022-12-05 21:20:00,198 INFO L175 Difference]: Start difference. First operand has 402 places, 899 transitions, 24758 flow. Second operand 8 states and 47 transitions. [2022-12-05 21:20:00,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 893 transitions, 26054 flow [2022-12-05 21:20:02,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 893 transitions, 25053 flow, removed 58 selfloop flow, removed 14 redundant places. [2022-12-05 21:20:02,807 INFO L231 Difference]: Finished difference. Result has 391 places, 855 transitions, 23310 flow [2022-12-05 21:20:02,808 INFO L276 CegarLoopForPetriNet]: {PETRI_ALPHABET=25, PETRI_DIFFERENCE_MINUEND_FLOW=22987, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=364, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=23310, PETRI_PLACES=391, PETRI_TRANSITIONS=855} [2022-12-05 21:20:02,808 INFO L294 CegarLoopForPetriNet]: 25 programPoint places, 366 predicate places. [2022-12-05 21:20:02,808 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 855 transitions, 23310 flow [2022-12-05 21:20:02,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:02,808 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-05 21:20:02,808 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-05 21:20:02,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-12-05 21:20:02,809 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-05 21:20:02,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-05 21:20:02,809 INFO L85 PathProgramCache]: Analyzing trace with hash 527080327, now seen corresponding path program 11 times [2022-12-05 21:20:02,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-05 21:20:02,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585275523] [2022-12-05 21:20:02,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-05 21:20:02,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-05 21:20:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-05 21:20:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:20:03,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-05 21:20:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585275523] [2022-12-05 21:20:03,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585275523] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-05 21:20:03,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345867855] [2022-12-05 21:20:03,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-05 21:20:03,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:20:03,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-05 21:20:03,300 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-05 21:20:03,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-12-05 21:20:03,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-05 21:20:03,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-05 21:20:03,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-05 21:20:03,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-05 21:20:03,556 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 [2022-12-05 21:20:03,601 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 [2022-12-05 21:20:03,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-05 21:20:03,718 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 18 treesize of output 20 [2022-12-05 21:20:03,842 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-05 21:20:03,843 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 26 treesize of output 10 [2022-12-05 21:20:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:20:03,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-05 21:20:03,960 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2870 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2870))) (let ((.cse1 (select .cse0 c_~get2~0.base))) (or (not (= (select (select .cse0 c_~get1~0.base) c_~get1~0.offset) (select .cse1 c_~get2~0.offset))) (= |c_thread1Thread1of1ForFork1_#t~mem2| (select .cse1 (+ c_~get2~0.offset (* c_thread1Thread1of1ForFork1_~i~0 4)))))))) is different from false [2022-12-05 21:20:03,969 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2870 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2870))) (let ((.cse1 (select .cse0 c_~get2~0.base))) (or (not (= (select (select .cse0 c_~get1~0.base) c_~get1~0.offset) (select .cse1 c_~get2~0.offset))) (let ((.cse2 (* c_thread1Thread1of1ForFork1_~i~0 4))) (= (select (select |c_#memory_int| c_~get1~0.base) (+ .cse2 c_~get1~0.offset)) (select .cse1 (+ c_~get2~0.offset .cse2)))))))) is different from false [2022-12-05 21:20:03,977 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2870 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2870))) (let ((.cse1 (select (select .cse0 c_~get2~0.base) c_~get2~0.offset))) (or (not (= (select (select .cse0 c_~get1~0.base) c_~get1~0.offset) .cse1)) (= .cse1 (select (select |c_#memory_int| c_~get1~0.base) c_~get1~0.offset)))))) is different from false [2022-12-05 21:20:04,059 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:20:04,059 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 93 treesize of output 57 [2022-12-05 21:20:04,072 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:20:04,072 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 1492 treesize of output 1327 [2022-12-05 21:20:04,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:20:04,089 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 1316 treesize of output 1236 [2022-12-05 21:20:04,107 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-05 21:20:04,108 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 1228 treesize of output 1092 [2022-12-05 21:20:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-05 21:20:04,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345867855] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-05 21:20:04,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-05 21:20:04,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2022-12-05 21:20:04,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067215995] [2022-12-05 21:20:04,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-05 21:20:04,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-05 21:20:04,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-05 21:20:04,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-05 21:20:04,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=12, NotChecked=168, Total=992 [2022-12-05 21:20:04,485 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 0 out of 25 [2022-12-05 21:20:04,485 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 855 transitions, 23310 flow. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-05 21:20:04,485 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-05 21:20:04,485 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 0 of 25 [2022-12-05 21:20:04,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2022-12-05 21:20:08,551 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-12-05 21:20:08,553 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 [2022-12-05 21:20:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-05 21:20:08,607 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-12-05 21:20:08,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-12-05 21:20:08,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-05 21:20:08,808 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 0/25 universal loopers) in iteration 78,while PetriNetUnfolder was constructing finite prefix that currently has 81436 conditions, 7671 events (4236/7670 cut-off events. For 231835/231835 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 62361 event pairs, 1629 based on Foata normal form. 22/8156 useless extension candidates. Maximal degree in co-relation 81326. Up to 3842 conditions per place.). [2022-12-05 21:20:08,809 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-12-05 21:20:08,809 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-12-05 21:20:08,810 INFO L458 BasicCegarLoop]: Path program histogram: [23, 15, 11, 10, 6, 6, 2, 1, 1, 1, 1, 1] [2022-12-05 21:20:08,812 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-05 21:20:08,812 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-05 21:20:08,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.12 09:20:08 BasicIcfg [2022-12-05 21:20:08,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-05 21:20:08,817 INFO L158 Benchmark]: Toolchain (without parser) took 766387.12ms. Allocated memory was 180.4MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 156.6MB in the beginning and 5.2GB in the end (delta: -5.1GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-12-05 21:20:08,817 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 180.4MB. Free memory is still 156.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-05 21:20:08,817 INFO L158 Benchmark]: CACSL2BoogieTranslator took 290.33ms. Allocated memory is still 180.4MB. Free memory was 156.6MB in the beginning and 144.7MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-12-05 21:20:08,818 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.40ms. Allocated memory is still 180.4MB. Free memory was 144.7MB in the beginning and 143.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 21:20:08,819 INFO L158 Benchmark]: Boogie Preprocessor took 47.86ms. Allocated memory is still 180.4MB. Free memory was 143.1MB in the beginning and 141.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-05 21:20:08,819 INFO L158 Benchmark]: RCFGBuilder took 588.81ms. Allocated memory is still 180.4MB. Free memory was 141.0MB in the beginning and 122.1MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. [2022-12-05 21:20:08,819 INFO L158 Benchmark]: TraceAbstraction took 765400.13ms. Allocated memory was 180.4MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 121.7MB in the beginning and 5.2GB in the end (delta: -5.1GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. [2022-12-05 21:20:08,820 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 180.4MB. Free memory is still 156.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 290.33ms. Allocated memory is still 180.4MB. Free memory was 156.6MB in the beginning and 144.7MB in the end (delta: 11.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 52.40ms. Allocated memory is still 180.4MB. Free memory was 144.7MB in the beginning and 143.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 47.86ms. Allocated memory is still 180.4MB. Free memory was 143.1MB in the beginning and 141.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 588.81ms. Allocated memory is still 180.4MB. Free memory was 141.0MB in the beginning and 122.1MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 8.0GB. * TraceAbstraction took 765400.13ms. Allocated memory was 180.4MB in the beginning and 6.3GB in the end (delta: 6.1GB). Free memory was 121.7MB in the beginning and 5.2GB in the end (delta: -5.1GB). Peak memory consumption was 1.4GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.9s, 183 PlacesBefore, 25 PlacesAfterwards, 197 TransitionsBefore, 25 TransitionsAfterwards, 2700 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 108 TrivialYvCompositions, 50 ConcurrentYvCompositions, 13 ChoiceCompositions, 172 TotalNumberOfCompositions, Independence Relation Statistics: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 1534, independent: 1507, independent conditional: 1507, independent unconditional: 0, dependent: 27, dependent conditional: 27, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 1534, independent: 1507, independent conditional: 0, independent unconditional: 1507, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 1534, independent: 1507, independent conditional: 0, independent unconditional: 1507, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 1534, independent: 1507, independent conditional: 0, independent unconditional: 1507, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1422, independent: 1405, independent conditional: 0, independent unconditional: 1405, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1422, independent: 1405, independent conditional: 0, independent unconditional: 1405, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 17, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 28, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 28, dependent conditional: 0, dependent unconditional: 28, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1534, independent: 102, independent conditional: 0, independent unconditional: 102, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 1422, unknown conditional: 0, unknown unconditional: 1422] , Statistics on independence cache: Total cache size (in pairs): 2494, Positive cache size: 2477, Positive conditional cache size: 0, Positive unconditional cache size: 2477, Negative cache size: 17, Negative conditional cache size: 0, Negative unconditional cache size: 17, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0, Eliminated conditions: 0, Maximal queried relation: -1 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 0/25 universal loopers) in iteration 78,while PetriNetUnfolder was constructing finite prefix that currently has 81436 conditions, 7671 events (4236/7670 cut-off events. For 231835/231835 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 62361 event pairs, 1629 based on Foata normal form. 22/8156 useless extension candidates. Maximal degree in co-relation 81326. Up to 3842 conditions per place.). - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 0/25 universal loopers) in iteration 78,while PetriNetUnfolder was constructing finite prefix that currently has 81436 conditions, 7671 events (4236/7670 cut-off events. For 231835/231835 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 62361 event pairs, 1629 based on Foata normal form. 22/8156 useless extension candidates. Maximal degree in co-relation 81326. Up to 3842 conditions per place.). - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (32states, 0/25 universal loopers) in iteration 78,while PetriNetUnfolder was constructing finite prefix that currently has 81436 conditions, 7671 events (4236/7670 cut-off events. For 231835/231835 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 62361 event pairs, 1629 based on Foata normal form. 22/8156 useless extension candidates. Maximal degree in co-relation 81326. Up to 3842 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 241 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 765.2s, OverallIterations: 78, TraceHistogramMax: 2, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 354.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.1s, HoareTripleCheckerStatistics: 102 mSolverCounterUnknown, 14673 SdHoareTripleChecker+Valid, 70.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14673 mSDsluCounter, 78 SdHoareTripleChecker+Invalid, 67.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 396 IncrementalHoareTripleChecker+Unchecked, 66 mSDsCounter, 846 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 37144 IncrementalHoareTripleChecker+Invalid, 38488 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 846 mSolverCounterUnsat, 12 mSDtfsCounter, 37144 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3850 GetRequests, 1286 SyntacticMatches, 43 SemanticMatches, 2521 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 23084 ImplicationChecksByTransitivity, 126.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28099occurred in iteration=63, InterpolantAutomatonStates: 1075, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.9s SsaConstructionTime, 4.2s SatisfiabilityAnalysisTime, 377.5s InterpolantComputationTime, 2817 NumberOfCodeBlocks, 2782 NumberOfCodeBlocksAsserted, 186 NumberOfCheckSat, 3633 ConstructedInterpolants, 154 QuantifiedInterpolants, 73735 SizeOfPredicates, 1671 NumberOfNonLiveVariables, 14632 ConjunctsInSsa, 2284 ConjunctsInUnsatCore, 199 InterpolantComputations, 47 PerfectInterpolantSequences, 235/543 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