/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 05:42:50,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 05:42:50,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 05:42:50,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 05:42:50,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 05:42:50,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 05:42:50,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 05:42:50,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 05:42:50,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 05:42:50,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 05:42:50,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 05:42:50,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 05:42:50,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 05:42:50,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 05:42:50,807 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 05:42:50,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 05:42:50,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 05:42:50,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 05:42:50,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 05:42:50,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 05:42:50,811 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 05:42:50,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 05:42:50,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 05:42:50,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 05:42:50,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 05:42:50,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 05:42:50,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 05:42:50,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 05:42:50,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 05:42:50,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 05:42:50,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 05:42:50,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 05:42:50,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 05:42:50,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 05:42:50,818 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 05:42:50,818 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 05:42:50,819 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 05:42:50,819 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 05:42:50,819 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 05:42:50,819 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 05:42:50,820 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 05:42:50,822 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 05:42:50,855 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 05:42:50,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 05:42:50,856 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 05:42:50,856 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 05:42:50,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 05:42:50,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 05:42:50,856 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 05:42:50,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 05:42:50,857 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 05:42:50,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 05:42:50,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 05:42:50,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 05:42:50,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 05:42:50,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 05:42:50,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 05:42:50,857 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 05:42:50,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 05:42:50,857 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 05:42:50,857 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 05:42:50,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 05:42:50,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 05:42:50,858 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 05:42:50,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 05:42:50,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 05:42:50,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 05:42:50,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 05:42:50,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 05:42:50,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 05:42:50,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 05:42:50,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 05:42:50,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 05:42:50,858 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 05:42:50,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 05:42:51,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 05:42:51,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 05:42:51,004 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 05:42:51,004 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 05:42:51,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-01-28 05:42:51,992 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 05:42:52,135 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 05:42:52,135 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c [2023-01-28 05:42:52,140 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8591855/ad2ea97e70044791ac9d1392d17ed3c8/FLAGaf51c370a [2023-01-28 05:42:52,148 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1a8591855/ad2ea97e70044791ac9d1392d17ed3c8 [2023-01-28 05:42:52,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 05:42:52,151 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 05:42:52,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 05:42:52,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 05:42:52,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 05:42:52,154 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f9dec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52, skipping insertion in model container [2023-01-28 05:42:52,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 05:42:52,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 05:42:52,273 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-01-28 05:42:52,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 05:42:52,298 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 05:42:52,313 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-3.wvr.c[2500,2513] [2023-01-28 05:42:52,315 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 05:42:52,325 INFO L208 MainTranslator]: Completed translation [2023-01-28 05:42:52,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52 WrapperNode [2023-01-28 05:42:52,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 05:42:52,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 05:42:52,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 05:42:52,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 05:42:52,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,336 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,350 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 147 [2023-01-28 05:42:52,350 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 05:42:52,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 05:42:52,351 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 05:42:52,351 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 05:42:52,357 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,363 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,365 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,366 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 05:42:52,369 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 05:42:52,369 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 05:42:52,369 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 05:42:52,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (1/1) ... [2023-01-28 05:42:52,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 05:42:52,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:42:52,393 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 05:42:52,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 05:42:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 05:42:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 05:42:52,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 05:42:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 05:42:52,444 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 05:42:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 05:42:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 05:42:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 05:42:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 05:42:52,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 05:42:52,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 05:42:52,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 05:42:52,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 05:42:52,447 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 05:42:52,543 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 05:42:52,544 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 05:42:52,809 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 05:42:52,817 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 05:42:52,817 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 05:42:52,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 05:42:52 BoogieIcfgContainer [2023-01-28 05:42:52,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 05:42:52,821 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 05:42:52,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 05:42:52,824 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 05:42:52,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 05:42:52" (1/3) ... [2023-01-28 05:42:52,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c84f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 05:42:52, skipping insertion in model container [2023-01-28 05:42:52,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:42:52" (2/3) ... [2023-01-28 05:42:52,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c84f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 05:42:52, skipping insertion in model container [2023-01-28 05:42:52,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 05:42:52" (3/3) ... [2023-01-28 05:42:52,826 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2023-01-28 05:42:52,840 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 05:42:52,841 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 05:42:52,841 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 05:42:52,907 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 05:42:52,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 170 transitions, 356 flow [2023-01-28 05:42:53,006 INFO L130 PetriNetUnfolder]: 15/168 cut-off events. [2023-01-28 05:42:53,006 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:42:53,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 15/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 167 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-01-28 05:42:53,011 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 170 transitions, 356 flow [2023-01-28 05:42:53,015 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 160 transitions, 332 flow [2023-01-28 05:42:53,018 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 05:42:53,024 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 160 transitions, 332 flow [2023-01-28 05:42:53,026 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 160 transitions, 332 flow [2023-01-28 05:42:53,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 160 transitions, 332 flow [2023-01-28 05:42:53,053 INFO L130 PetriNetUnfolder]: 15/160 cut-off events. [2023-01-28 05:42:53,054 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:42:53,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 160 events. 15/160 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 148 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 100. Up to 2 conditions per place. [2023-01-28 05:42:53,056 INFO L119 LiptonReduction]: Number of co-enabled transitions 2592 [2023-01-28 05:42:56,693 INFO L134 LiptonReduction]: Checked pairs total: 2630 [2023-01-28 05:42:56,694 INFO L136 LiptonReduction]: Total number of compositions: 185 [2023-01-28 05:42:56,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 05:42:56,708 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;@85b855b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 05:42:56,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 05:42:56,712 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 05:42:56,712 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:42:56,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:42:56,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:42:56,713 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:42:56,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:42:56,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1588788240, now seen corresponding path program 1 times [2023-01-28 05:42:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:42:56,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473522670] [2023-01-28 05:42:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:42:56,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:42:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:42:57,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:42:57,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:42:57,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473522670] [2023-01-28 05:42:57,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473522670] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:42:57,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:42:57,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 05:42:57,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810078710] [2023-01-28 05:42:57,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:42:57,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 05:42:57,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:42:57,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 05:42:57,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 05:42:57,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 355 [2023-01-28 05:42:57,079 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,079 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:42:57,079 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 355 [2023-01-28 05:42:57,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:42:57,134 INFO L130 PetriNetUnfolder]: 45/80 cut-off events. [2023-01-28 05:42:57,134 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 05:42:57,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 188 event pairs, 18 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-01-28 05:42:57,138 INFO L137 encePairwiseOnDemand]: 352/355 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-01-28 05:42:57,138 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 18 transitions, 80 flow [2023-01-28 05:42:57,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 05:42:57,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 05:42:57,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-01-28 05:42:57,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415962441314554 [2023-01-28 05:42:57,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-01-28 05:42:57,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-01-28 05:42:57,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:42:57,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-01-28 05:42:57,166 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,181 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,183 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 3 states and 443 transitions. [2023-01-28 05:42:57,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 18 transitions, 80 flow [2023-01-28 05:42:57,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 05:42:57,186 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 50 flow [2023-01-28 05:42:57,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-01-28 05:42:57,190 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -1 predicate places. [2023-01-28 05:42:57,190 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 50 flow [2023-01-28 05:42:57,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:42:57,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:42:57,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 05:42:57,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:42:57,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:42:57,191 INFO L85 PathProgramCache]: Analyzing trace with hash -300848525, now seen corresponding path program 1 times [2023-01-28 05:42:57,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:42:57,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076658186] [2023-01-28 05:42:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:42:57,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:42:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:42:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:57,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:42:57,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076658186] [2023-01-28 05:42:57,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076658186] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:42:57,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:42:57,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 05:42:57,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289083018] [2023-01-28 05:42:57,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:42:57,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 05:42:57,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:42:57,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 05:42:57,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 05:42:57,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 355 [2023-01-28 05:42:57,373 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,373 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:42:57,373 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 355 [2023-01-28 05:42:57,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:42:57,419 INFO L130 PetriNetUnfolder]: 66/117 cut-off events. [2023-01-28 05:42:57,419 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:42:57,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 117 events. 66/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 315 event pairs, 9 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 234. Up to 85 conditions per place. [2023-01-28 05:42:57,421 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 22 selfloop transitions, 3 changer transitions 1/28 dead transitions. [2023-01-28 05:42:57,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 28 transitions, 125 flow [2023-01-28 05:42:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 05:42:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 05:42:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-01-28 05:42:57,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131455399061033 [2023-01-28 05:42:57,423 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-01-28 05:42:57,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-01-28 05:42:57,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:42:57,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-01-28 05:42:57,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 355.0) internal successors, (1420), 4 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,427 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 50 flow. Second operand 3 states and 440 transitions. [2023-01-28 05:42:57,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 28 transitions, 125 flow [2023-01-28 05:42:57,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 28 transitions, 121 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 05:42:57,429 INFO L231 Difference]: Finished difference. Result has 22 places, 20 transitions, 65 flow [2023-01-28 05:42:57,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=22, PETRI_TRANSITIONS=20} [2023-01-28 05:42:57,430 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-01-28 05:42:57,430 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 20 transitions, 65 flow [2023-01-28 05:42:57,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:42:57,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:42:57,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 05:42:57,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:42:57,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:42:57,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1190840402, now seen corresponding path program 1 times [2023-01-28 05:42:57,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:42:57,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064024065] [2023-01-28 05:42:57,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:42:57,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:42:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:42:57,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:57,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:42:57,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064024065] [2023-01-28 05:42:57,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064024065] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:42:57,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:42:57,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 05:42:57,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573242175] [2023-01-28 05:42:57,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:42:57,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 05:42:57,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:42:57,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 05:42:57,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 05:42:57,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:42:57,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 20 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:42:57,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:42:57,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:42:57,745 INFO L130 PetriNetUnfolder]: 85/170 cut-off events. [2023-01-28 05:42:57,745 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-01-28 05:42:57,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 170 events. 85/170 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 568 event pairs, 26 based on Foata normal form. 12/181 useless extension candidates. Maximal degree in co-relation 386. Up to 87 conditions per place. [2023-01-28 05:42:57,746 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 31 selfloop transitions, 4 changer transitions 8/43 dead transitions. [2023-01-28 05:42:57,746 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 212 flow [2023-01-28 05:42:57,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 05:42:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 05:42:57,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 721 transitions. [2023-01-28 05:42:57,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40619718309859154 [2023-01-28 05:42:57,749 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 721 transitions. [2023-01-28 05:42:57,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 721 transitions. [2023-01-28 05:42:57,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:42:57,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 721 transitions. [2023-01-28 05:42:57,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,752 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,753 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,753 INFO L175 Difference]: Start difference. First operand has 22 places, 20 transitions, 65 flow. Second operand 5 states and 721 transitions. [2023-01-28 05:42:57,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 212 flow [2023-01-28 05:42:57,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 05:42:57,754 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 93 flow [2023-01-28 05:42:57,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=93, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2023-01-28 05:42:57,755 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-01-28 05:42:57,755 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 93 flow [2023-01-28 05:42:57,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:57,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:42:57,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:42:57,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 05:42:57,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:42:57,756 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:42:57,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1541576124, now seen corresponding path program 2 times [2023-01-28 05:42:57,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:42:57,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919136943] [2023-01-28 05:42:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:42:57,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:42:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:42:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:57,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:42:57,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919136943] [2023-01-28 05:42:57,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919136943] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:42:57,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961526009] [2023-01-28 05:42:57,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:42:57,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:42:57,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:42:57,871 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:42:57,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 05:42:57,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:42:57,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:42:57,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 05:42:57,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:42:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:58,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:42:58,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:58,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961526009] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 05:42:58,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 05:42:58,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-01-28 05:42:58,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129915149] [2023-01-28 05:42:58,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:42:58,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 05:42:58,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:42:58,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 05:42:58,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-28 05:42:58,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 355 [2023-01-28 05:42:58,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:42:58,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 355 [2023-01-28 05:42:58,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:42:58,184 INFO L130 PetriNetUnfolder]: 85/163 cut-off events. [2023-01-28 05:42:58,184 INFO L131 PetriNetUnfolder]: For 133/144 co-relation queries the response was YES. [2023-01-28 05:42:58,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 494 conditions, 163 events. 85/163 cut-off events. For 133/144 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 513 event pairs, 24 based on Foata normal form. 7/168 useless extension candidates. Maximal degree in co-relation 474. Up to 104 conditions per place. [2023-01-28 05:42:58,186 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 26 selfloop transitions, 4 changer transitions 4/35 dead transitions. [2023-01-28 05:42:58,186 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 35 transitions, 206 flow [2023-01-28 05:42:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:42:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 05:42:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-01-28 05:42:58,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253521126760563 [2023-01-28 05:42:58,199 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-01-28 05:42:58,199 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-01-28 05:42:58,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:42:58,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-01-28 05:42:58,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,203 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,204 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,204 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 93 flow. Second operand 4 states and 604 transitions. [2023-01-28 05:42:58,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 35 transitions, 206 flow [2023-01-28 05:42:58,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 193 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 05:42:58,206 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 112 flow [2023-01-28 05:42:58,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2023-01-28 05:42:58,207 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 9 predicate places. [2023-01-28 05:42:58,207 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 112 flow [2023-01-28 05:42:58,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:42:58,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:42:58,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 05:42:58,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:42:58,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:42:58,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:42:58,415 INFO L85 PathProgramCache]: Analyzing trace with hash -688555301, now seen corresponding path program 1 times [2023-01-28 05:42:58,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:42:58,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879545323] [2023-01-28 05:42:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:42:58,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:42:58,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:42:58,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:58,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:42:58,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879545323] [2023-01-28 05:42:58,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879545323] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:42:58,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:42:58,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 05:42:58,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247963196] [2023-01-28 05:42:58,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:42:58,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 05:42:58,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:42:58,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 05:42:58,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-28 05:42:58,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:42:58,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:42:58,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:42:58,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:42:58,607 INFO L130 PetriNetUnfolder]: 95/188 cut-off events. [2023-01-28 05:42:58,607 INFO L131 PetriNetUnfolder]: For 211/211 co-relation queries the response was YES. [2023-01-28 05:42:58,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 188 events. 95/188 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 634 event pairs, 28 based on Foata normal form. 2/189 useless extension candidates. Maximal degree in co-relation 568. Up to 93 conditions per place. [2023-01-28 05:42:58,610 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 31 selfloop transitions, 9 changer transitions 10/50 dead transitions. [2023-01-28 05:42:58,610 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 50 transitions, 309 flow [2023-01-28 05:42:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 05:42:58,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 05:42:58,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 861 transitions. [2023-01-28 05:42:58,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4042253521126761 [2023-01-28 05:42:58,612 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 861 transitions. [2023-01-28 05:42:58,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 861 transitions. [2023-01-28 05:42:58,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:42:58,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 861 transitions. [2023-01-28 05:42:58,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.5) internal successors, (861), 6 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,618 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,618 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 112 flow. Second operand 6 states and 861 transitions. [2023-01-28 05:42:58,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 50 transitions, 309 flow [2023-01-28 05:42:58,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 50 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 05:42:58,622 INFO L231 Difference]: Finished difference. Result has 36 places, 27 transitions, 163 flow [2023-01-28 05:42:58,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=163, PETRI_PLACES=36, PETRI_TRANSITIONS=27} [2023-01-28 05:42:58,624 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 15 predicate places. [2023-01-28 05:42:58,624 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 27 transitions, 163 flow [2023-01-28 05:42:58,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:42:58,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:42:58,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 05:42:58,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:42:58,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:42:58,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1929012174, now seen corresponding path program 3 times [2023-01-28 05:42:58,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:42:58,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393485785] [2023-01-28 05:42:58,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:42:58,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:42:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:42:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:58,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:42:58,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393485785] [2023-01-28 05:42:58,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393485785] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:42:58,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:42:58,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 05:42:58,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430143344] [2023-01-28 05:42:58,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:42:58,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 05:42:58,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:42:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 05:42:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 05:42:58,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 355 [2023-01-28 05:42:58,703 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 27 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,703 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:42:58,703 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 355 [2023-01-28 05:42:58,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:42:58,749 INFO L130 PetriNetUnfolder]: 88/163 cut-off events. [2023-01-28 05:42:58,749 INFO L131 PetriNetUnfolder]: For 349/352 co-relation queries the response was YES. [2023-01-28 05:42:58,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 163 events. 88/163 cut-off events. For 349/352 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 511 event pairs, 22 based on Foata normal form. 4/159 useless extension candidates. Maximal degree in co-relation 619. Up to 95 conditions per place. [2023-01-28 05:42:58,750 INFO L137 encePairwiseOnDemand]: 351/355 looper letters, 24 selfloop transitions, 10 changer transitions 4/40 dead transitions. [2023-01-28 05:42:58,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 40 transitions, 297 flow [2023-01-28 05:42:58,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:42:58,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 05:42:58,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 603 transitions. [2023-01-28 05:42:58,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42464788732394365 [2023-01-28 05:42:58,753 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 603 transitions. [2023-01-28 05:42:58,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 603 transitions. [2023-01-28 05:42:58,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:42:58,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 603 transitions. [2023-01-28 05:42:58,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.75) internal successors, (603), 4 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,756 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 355.0) internal successors, (1775), 5 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,756 INFO L175 Difference]: Start difference. First operand has 36 places, 27 transitions, 163 flow. Second operand 4 states and 603 transitions. [2023-01-28 05:42:58,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 40 transitions, 297 flow [2023-01-28 05:42:58,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 278 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 05:42:58,759 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 193 flow [2023-01-28 05:42:58,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-01-28 05:42:58,761 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-01-28 05:42:58,761 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 193 flow [2023-01-28 05:42:58,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.75) internal successors, (587), 4 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:42:58,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:42:58,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 05:42:58,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:42:58,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:42:58,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1410892719, now seen corresponding path program 2 times [2023-01-28 05:42:58,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:42:58,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172358422] [2023-01-28 05:42:58,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:42:58,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:42:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:42:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:58,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:42:58,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172358422] [2023-01-28 05:42:58,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172358422] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:42:58,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:42:58,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 05:42:58,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050622140] [2023-01-28 05:42:58,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:42:58,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 05:42:58,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:42:58,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 05:42:58,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 05:42:58,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:42:58,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:42:58,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:42:58,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:42:58,947 INFO L130 PetriNetUnfolder]: 87/154 cut-off events. [2023-01-28 05:42:58,947 INFO L131 PetriNetUnfolder]: For 324/324 co-relation queries the response was YES. [2023-01-28 05:42:58,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 154 events. 87/154 cut-off events. For 324/324 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 426 event pairs, 2 based on Foata normal form. 6/159 useless extension candidates. Maximal degree in co-relation 620. Up to 82 conditions per place. [2023-01-28 05:42:58,949 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 35 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2023-01-28 05:42:58,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 354 flow [2023-01-28 05:42:58,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 05:42:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 05:42:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 858 transitions. [2023-01-28 05:42:58,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028169014084507 [2023-01-28 05:42:58,951 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 858 transitions. [2023-01-28 05:42:58,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 858 transitions. [2023-01-28 05:42:58,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:42:58,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 858 transitions. [2023-01-28 05:42:58,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 143.0) internal successors, (858), 6 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,955 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 355.0) internal successors, (2485), 7 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,955 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 193 flow. Second operand 6 states and 858 transitions. [2023-01-28 05:42:58,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 354 flow [2023-01-28 05:42:58,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 47 transitions, 327 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-28 05:42:58,958 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 223 flow [2023-01-28 05:42:58,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=223, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2023-01-28 05:42:58,959 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 19 predicate places. [2023-01-28 05:42:58,959 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 223 flow [2023-01-28 05:42:58,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:58,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:42:58,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:42:58,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 05:42:58,959 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:42:58,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:42:58,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1350358541, now seen corresponding path program 3 times [2023-01-28 05:42:58,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:42:58,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093308344] [2023-01-28 05:42:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:42:58,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:42:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:42:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:59,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:42:59,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093308344] [2023-01-28 05:42:59,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093308344] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:42:59,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:42:59,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 05:42:59,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519609015] [2023-01-28 05:42:59,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:42:59,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 05:42:59,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:42:59,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 05:42:59,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 05:42:59,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:42:59,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 223 flow. Second operand has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:59,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:42:59,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:42:59,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:42:59,144 INFO L130 PetriNetUnfolder]: 98/181 cut-off events. [2023-01-28 05:42:59,144 INFO L131 PetriNetUnfolder]: For 604/604 co-relation queries the response was YES. [2023-01-28 05:42:59,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 770 conditions, 181 events. 98/181 cut-off events. For 604/604 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 526 event pairs, 31 based on Foata normal form. 6/186 useless extension candidates. Maximal degree in co-relation 745. Up to 124 conditions per place. [2023-01-28 05:42:59,145 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 37 selfloop transitions, 9 changer transitions 2/48 dead transitions. [2023-01-28 05:42:59,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 48 transitions, 402 flow [2023-01-28 05:42:59,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 05:42:59,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 05:42:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 715 transitions. [2023-01-28 05:42:59,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4028169014084507 [2023-01-28 05:42:59,148 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 715 transitions. [2023-01-28 05:42:59,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 715 transitions. [2023-01-28 05:42:59,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:42:59,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 715 transitions. [2023-01-28 05:42:59,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.0) internal successors, (715), 5 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:59,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:59,151 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:59,152 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 223 flow. Second operand 5 states and 715 transitions. [2023-01-28 05:42:59,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 48 transitions, 402 flow [2023-01-28 05:42:59,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 48 transitions, 364 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-28 05:42:59,154 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 245 flow [2023-01-28 05:42:59,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=245, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2023-01-28 05:42:59,156 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 23 predicate places. [2023-01-28 05:42:59,156 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 245 flow [2023-01-28 05:42:59,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:59,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:42:59,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:42:59,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 05:42:59,156 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:42:59,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:42:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1909704249, now seen corresponding path program 4 times [2023-01-28 05:42:59,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:42:59,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809428187] [2023-01-28 05:42:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:42:59,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:42:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:42:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:59,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:42:59,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809428187] [2023-01-28 05:42:59,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809428187] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:42:59,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276848708] [2023-01-28 05:42:59,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:42:59,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:42:59,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:42:59,247 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:42:59,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 05:42:59,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:42:59,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:42:59,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 05:42:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:42:59,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:59,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:42:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:59,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276848708] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:42:59,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:42:59,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-01-28 05:42:59,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537833658] [2023-01-28 05:42:59,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:42:59,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 05:42:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:42:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 05:42:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-28 05:42:59,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:42:59,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 139.57142857142858) internal successors, (977), 7 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:59,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:42:59,461 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:42:59,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:42:59,581 INFO L130 PetriNetUnfolder]: 113/206 cut-off events. [2023-01-28 05:42:59,581 INFO L131 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2023-01-28 05:42:59,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947 conditions, 206 events. 113/206 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 613 event pairs, 28 based on Foata normal form. 6/211 useless extension candidates. Maximal degree in co-relation 919. Up to 127 conditions per place. [2023-01-28 05:42:59,582 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 40 selfloop transitions, 17 changer transitions 2/59 dead transitions. [2023-01-28 05:42:59,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 498 flow [2023-01-28 05:42:59,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 05:42:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 05:42:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1000 transitions. [2023-01-28 05:42:59,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024144869215292 [2023-01-28 05:42:59,585 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1000 transitions. [2023-01-28 05:42:59,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1000 transitions. [2023-01-28 05:42:59,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:42:59,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1000 transitions. [2023-01-28 05:42:59,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 142.85714285714286) internal successors, (1000), 7 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:59,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:59,589 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 355.0) internal successors, (2840), 8 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:59,589 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 245 flow. Second operand 7 states and 1000 transitions. [2023-01-28 05:42:59,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 498 flow [2023-01-28 05:42:59,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 466 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-01-28 05:42:59,592 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 306 flow [2023-01-28 05:42:59,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=306, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2023-01-28 05:42:59,592 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 28 predicate places. [2023-01-28 05:42:59,592 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 306 flow [2023-01-28 05:42:59,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 139.57142857142858) internal successors, (977), 7 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:42:59,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:42:59,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:42:59,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 05:42:59,797 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,SelfDestructingSolverStorable8 [2023-01-28 05:42:59,798 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:42:59,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:42:59,798 INFO L85 PathProgramCache]: Analyzing trace with hash -272112479, now seen corresponding path program 5 times [2023-01-28 05:42:59,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:42:59,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300537718] [2023-01-28 05:42:59,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:42:59,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:42:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:42:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:59,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:42:59,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300537718] [2023-01-28 05:42:59,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300537718] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:42:59,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862644946] [2023-01-28 05:42:59,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:42:59,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:42:59,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:42:59,861 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:42:59,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 05:42:59,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:42:59,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:42:59,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 05:42:59,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:42:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:42:59,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:42:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:43:00,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862644946] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:43:00,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:43:00,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 05:43:00,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860696551] [2023-01-28 05:43:00,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:43:00,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 05:43:00,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:43:00,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 05:43:00,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-01-28 05:43:00,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:43:00,002 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 306 flow. Second operand has 8 states, 8 states have (on average 138.75) internal successors, (1110), 8 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:00,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:43:00,003 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:43:00,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:43:00,102 INFO L130 PetriNetUnfolder]: 107/192 cut-off events. [2023-01-28 05:43:00,102 INFO L131 PetriNetUnfolder]: For 813/813 co-relation queries the response was YES. [2023-01-28 05:43:00,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 908 conditions, 192 events. 107/192 cut-off events. For 813/813 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 550 event pairs, 31 based on Foata normal form. 6/197 useless extension candidates. Maximal degree in co-relation 879. Up to 136 conditions per place. [2023-01-28 05:43:00,103 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 33 selfloop transitions, 14 changer transitions 2/49 dead transitions. [2023-01-28 05:43:00,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 49 transitions, 464 flow [2023-01-28 05:43:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 05:43:00,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 05:43:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 716 transitions. [2023-01-28 05:43:00,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40338028169014084 [2023-01-28 05:43:00,106 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 716 transitions. [2023-01-28 05:43:00,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 716 transitions. [2023-01-28 05:43:00,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:43:00,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 716 transitions. [2023-01-28 05:43:00,107 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.2) internal successors, (716), 5 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:00,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:00,109 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 355.0) internal successors, (2130), 6 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:00,109 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 306 flow. Second operand 5 states and 716 transitions. [2023-01-28 05:43:00,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 49 transitions, 464 flow [2023-01-28 05:43:00,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 49 transitions, 429 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-28 05:43:00,112 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 308 flow [2023-01-28 05:43:00,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2023-01-28 05:43:00,113 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 30 predicate places. [2023-01-28 05:43:00,114 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 308 flow [2023-01-28 05:43:00,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.75) internal successors, (1110), 8 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:00,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:43:00,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:43:00,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 05:43:00,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:00,321 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:43:00,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:43:00,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1221792128, now seen corresponding path program 1 times [2023-01-28 05:43:00,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:43:00,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869702777] [2023-01-28 05:43:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:43:00,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:43:00,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:43:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 05:43:00,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:43:00,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869702777] [2023-01-28 05:43:00,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869702777] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:43:00,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487749267] [2023-01-28 05:43:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:43:00,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:00,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:43:00,564 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:43:00,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 05:43:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:43:00,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2023-01-28 05:43:00,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:43:00,790 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2023-01-28 05:43:00,790 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 26 [2023-01-28 05:43:00,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:00,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:43:00,901 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-01-28 05:43:00,901 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-01-28 05:43:01,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:01,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487749267] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:43:01,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:43:01,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-01-28 05:43:01,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974131901] [2023-01-28 05:43:01,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:43:01,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 05:43:01,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:43:01,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 05:43:01,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-01-28 05:43:01,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 355 [2023-01-28 05:43:01,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 308 flow. Second operand has 14 states, 14 states have (on average 106.07142857142857) internal successors, (1485), 14 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:01,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:43:01,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 355 [2023-01-28 05:43:01,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:43:01,861 INFO L130 PetriNetUnfolder]: 285/505 cut-off events. [2023-01-28 05:43:01,861 INFO L131 PetriNetUnfolder]: For 1844/1886 co-relation queries the response was YES. [2023-01-28 05:43:01,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2338 conditions, 505 events. 285/505 cut-off events. For 1844/1886 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2095 event pairs, 18 based on Foata normal form. 58/557 useless extension candidates. Maximal degree in co-relation 2008. Up to 251 conditions per place. [2023-01-28 05:43:01,864 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 38 selfloop transitions, 23 changer transitions 77/141 dead transitions. [2023-01-28 05:43:01,864 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 141 transitions, 1231 flow [2023-01-28 05:43:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 05:43:01,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 05:43:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2380 transitions. [2023-01-28 05:43:01,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3047375160051216 [2023-01-28 05:43:01,870 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2380 transitions. [2023-01-28 05:43:01,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2380 transitions. [2023-01-28 05:43:01,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:43:01,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2380 transitions. [2023-01-28 05:43:01,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 108.18181818181819) internal successors, (2380), 22 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:01,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:01,881 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:01,881 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 308 flow. Second operand 22 states and 2380 transitions. [2023-01-28 05:43:01,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 141 transitions, 1231 flow [2023-01-28 05:43:01,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 141 transitions, 1119 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-01-28 05:43:01,886 INFO L231 Difference]: Finished difference. Result has 75 places, 44 transitions, 421 flow [2023-01-28 05:43:01,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=421, PETRI_PLACES=75, PETRI_TRANSITIONS=44} [2023-01-28 05:43:01,886 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 54 predicate places. [2023-01-28 05:43:01,886 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 44 transitions, 421 flow [2023-01-28 05:43:01,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.07142857142857) internal successors, (1485), 14 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:01,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:43:01,887 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:43:01,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 05:43:02,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:02,092 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:43:02,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:43:02,092 INFO L85 PathProgramCache]: Analyzing trace with hash -200909318, now seen corresponding path program 2 times [2023-01-28 05:43:02,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:43:02,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75639571] [2023-01-28 05:43:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:43:02,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:43:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:43:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:43:02,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:43:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75639571] [2023-01-28 05:43:02,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75639571] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:43:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281203556] [2023-01-28 05:43:02,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:43:02,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:02,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:43:02,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:43:02,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 05:43:02,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:43:02,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:43:02,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 05:43:02,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:43:02,761 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:43:02,771 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-01-28 05:43:02,771 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-01-28 05:43:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:02,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:43:02,896 INFO L321 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-01-28 05:43:02,896 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 85 [2023-01-28 05:43:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:03,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281203556] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:43:03,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:43:03,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-01-28 05:43:03,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104328985] [2023-01-28 05:43:03,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:43:03,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 05:43:03,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:43:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 05:43:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-01-28 05:43:03,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 355 [2023-01-28 05:43:03,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 44 transitions, 421 flow. Second operand has 15 states, 15 states have (on average 106.0) internal successors, (1590), 15 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:03,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:43:03,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 355 [2023-01-28 05:43:03,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:43:07,014 INFO L130 PetriNetUnfolder]: 229/420 cut-off events. [2023-01-28 05:43:07,014 INFO L131 PetriNetUnfolder]: For 2358/2379 co-relation queries the response was YES. [2023-01-28 05:43:07,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2458 conditions, 420 events. 229/420 cut-off events. For 2358/2379 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1623 event pairs, 0 based on Foata normal form. 48/467 useless extension candidates. Maximal degree in co-relation 2425. Up to 208 conditions per place. [2023-01-28 05:43:07,017 INFO L137 encePairwiseOnDemand]: 347/355 looper letters, 78 selfloop transitions, 35 changer transitions 33/149 dead transitions. [2023-01-28 05:43:07,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 149 transitions, 1488 flow [2023-01-28 05:43:07,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 05:43:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 05:43:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2800 transitions. [2023-01-28 05:43:07,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30335861321776814 [2023-01-28 05:43:07,023 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2800 transitions. [2023-01-28 05:43:07,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2800 transitions. [2023-01-28 05:43:07,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:43:07,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2800 transitions. [2023-01-28 05:43:07,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 107.6923076923077) internal successors, (2800), 26 states have internal predecessors, (2800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:07,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:07,047 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 355.0) internal successors, (9585), 27 states have internal predecessors, (9585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:07,047 INFO L175 Difference]: Start difference. First operand has 75 places, 44 transitions, 421 flow. Second operand 26 states and 2800 transitions. [2023-01-28 05:43:07,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 149 transitions, 1488 flow [2023-01-28 05:43:07,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 149 transitions, 1251 flow, removed 98 selfloop flow, removed 13 redundant places. [2023-01-28 05:43:07,054 INFO L231 Difference]: Finished difference. Result has 88 places, 56 transitions, 582 flow [2023-01-28 05:43:07,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=582, PETRI_PLACES=88, PETRI_TRANSITIONS=56} [2023-01-28 05:43:07,055 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 67 predicate places. [2023-01-28 05:43:07,055 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 56 transitions, 582 flow [2023-01-28 05:43:07,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.0) internal successors, (1590), 15 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:07,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:43:07,056 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:43:07,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 05:43:07,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 05:43:07,261 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:43:07,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:43:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1769074402, now seen corresponding path program 3 times [2023-01-28 05:43:07,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:43:07,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223454940] [2023-01-28 05:43:07,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:43:07,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:43:07,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:43:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:07,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:43:07,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223454940] [2023-01-28 05:43:07,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223454940] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:43:07,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885328264] [2023-01-28 05:43:07,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:43:07,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:07,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:43:07,767 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:43:07,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 05:43:07,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 05:43:07,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:43:07,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 05:43:07,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:43:07,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 05:43:07,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:43:07,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:43:08,075 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:43:08,083 INFO L321 Elim1Store]: treesize reduction 41, result has 14.6 percent of original size [2023-01-28 05:43:08,083 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 29 [2023-01-28 05:43:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:43:08,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:43:08,214 WARN L839 $PredicateComparison]: unable to prove that (forall ((~x1~0 Int) (v_ArrVal_287 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_287) c_~f~0.base))) (let ((.cse0 (select .cse1 (+ c_~f~0.offset (* (select .cse1 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))))) (or (<= c_~size~0 .cse0) (< ~x1~0 0) (<= c_~size~0 ~x1~0) (< .cse0 0) (= (select .cse1 (+ (* 4 .cse0) c_~f~0.offset)) (select .cse1 (+ (* ~x1~0 4) c_~f~0.offset))))))) is different from false [2023-01-28 05:43:08,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:08,334 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 218 treesize of output 134 [2023-01-28 05:43:08,366 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:08,366 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 332 treesize of output 348 [2023-01-28 05:43:08,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:08,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 268 treesize of output 252 [2023-01-28 05:43:08,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:08,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 141 [2023-01-28 05:43:09,450 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 05:43:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-01-28 05:43:09,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885328264] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:43:09,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:43:09,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2023-01-28 05:43:09,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926056143] [2023-01-28 05:43:09,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:43:09,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:43:09,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:43:09,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:43:09,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=210, Unknown=1, NotChecked=30, Total=306 [2023-01-28 05:43:09,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 05:43:09,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 56 transitions, 582 flow. Second operand has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:09,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:43:09,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 05:43:09,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:43:09,746 INFO L130 PetriNetUnfolder]: 174/328 cut-off events. [2023-01-28 05:43:09,746 INFO L131 PetriNetUnfolder]: For 1868/1895 co-relation queries the response was YES. [2023-01-28 05:43:09,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1948 conditions, 328 events. 174/328 cut-off events. For 1868/1895 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1204 event pairs, 20 based on Foata normal form. 21/341 useless extension candidates. Maximal degree in co-relation 1918. Up to 210 conditions per place. [2023-01-28 05:43:09,748 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 30 selfloop transitions, 9 changer transitions 29/74 dead transitions. [2023-01-28 05:43:09,748 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 74 transitions, 807 flow [2023-01-28 05:43:09,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 05:43:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 05:43:09,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 890 transitions. [2023-01-28 05:43:09,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31338028169014087 [2023-01-28 05:43:09,760 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 890 transitions. [2023-01-28 05:43:09,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 890 transitions. [2023-01-28 05:43:09,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:43:09,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 890 transitions. [2023-01-28 05:43:09,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.25) internal successors, (890), 8 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:09,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:09,765 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 355.0) internal successors, (3195), 9 states have internal predecessors, (3195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:09,765 INFO L175 Difference]: Start difference. First operand has 88 places, 56 transitions, 582 flow. Second operand 8 states and 890 transitions. [2023-01-28 05:43:09,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 74 transitions, 807 flow [2023-01-28 05:43:09,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 74 transitions, 712 flow, removed 29 selfloop flow, removed 14 redundant places. [2023-01-28 05:43:09,769 INFO L231 Difference]: Finished difference. Result has 77 places, 42 transitions, 379 flow [2023-01-28 05:43:09,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=379, PETRI_PLACES=77, PETRI_TRANSITIONS=42} [2023-01-28 05:43:09,770 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-01-28 05:43:09,770 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 42 transitions, 379 flow [2023-01-28 05:43:09,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 108.44444444444444) internal successors, (1952), 18 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:09,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:43:09,771 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:43:09,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-01-28 05:43:09,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:09,976 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:43:09,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:43:09,976 INFO L85 PathProgramCache]: Analyzing trace with hash 338363705, now seen corresponding path program 4 times [2023-01-28 05:43:09,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:43:09,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794267674] [2023-01-28 05:43:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:43:09,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:43:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:43:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:11,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:43:11,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794267674] [2023-01-28 05:43:11,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794267674] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:43:11,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114811303] [2023-01-28 05:43:11,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:43:11,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:11,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:43:11,733 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:43:11,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 05:43:11,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:43:11,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:43:11,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 05:43:11,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:43:11,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:11,985 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 05:43:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:43:11,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:43:12,177 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-28 05:43:12,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-28 05:43:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 05:43:12,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114811303] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:43:12,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:43:12,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-01-28 05:43:12,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867848119] [2023-01-28 05:43:12,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:43:12,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 05:43:12,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:43:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 05:43:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2023-01-28 05:43:12,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 05:43:12,372 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 42 transitions, 379 flow. Second operand has 20 states, 20 states have (on average 108.05) internal successors, (2161), 20 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:12,372 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:43:12,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 05:43:12,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:43:13,181 INFO L130 PetriNetUnfolder]: 428/757 cut-off events. [2023-01-28 05:43:13,181 INFO L131 PetriNetUnfolder]: For 4045/4087 co-relation queries the response was YES. [2023-01-28 05:43:13,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 757 events. 428/757 cut-off events. For 4045/4087 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3320 event pairs, 21 based on Foata normal form. 38/784 useless extension candidates. Maximal degree in co-relation 4027. Up to 385 conditions per place. [2023-01-28 05:43:13,187 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 90 selfloop transitions, 81 changer transitions 2/179 dead transitions. [2023-01-28 05:43:13,187 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 179 transitions, 1794 flow [2023-01-28 05:43:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 05:43:13,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 05:43:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2134 transitions. [2023-01-28 05:43:13,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31638250555967384 [2023-01-28 05:43:13,190 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2134 transitions. [2023-01-28 05:43:13,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2134 transitions. [2023-01-28 05:43:13,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:43:13,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2134 transitions. [2023-01-28 05:43:13,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 112.3157894736842) internal successors, (2134), 19 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:13,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:13,198 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 355.0) internal successors, (7100), 20 states have internal predecessors, (7100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:13,198 INFO L175 Difference]: Start difference. First operand has 77 places, 42 transitions, 379 flow. Second operand 19 states and 2134 transitions. [2023-01-28 05:43:13,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 179 transitions, 1794 flow [2023-01-28 05:43:13,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 179 transitions, 1606 flow, removed 69 selfloop flow, removed 11 redundant places. [2023-01-28 05:43:13,205 INFO L231 Difference]: Finished difference. Result has 76 places, 116 transitions, 1275 flow [2023-01-28 05:43:13,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1275, PETRI_PLACES=76, PETRI_TRANSITIONS=116} [2023-01-28 05:43:13,206 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 55 predicate places. [2023-01-28 05:43:13,206 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 116 transitions, 1275 flow [2023-01-28 05:43:13,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.05) internal successors, (2161), 20 states have internal predecessors, (2161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:13,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:43:13,207 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:43:13,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 05:43:13,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:13,412 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:43:13,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:43:13,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1347173951, now seen corresponding path program 5 times [2023-01-28 05:43:13,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:43:13,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918466703] [2023-01-28 05:43:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:43:13,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:43:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:43:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:14,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:43:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918466703] [2023-01-28 05:43:14,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918466703] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:43:14,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300969274] [2023-01-28 05:43:14,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:43:14,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:14,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:43:14,536 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:43:14,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 05:43:14,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:43:14,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:43:14,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 05:43:14,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:43:14,756 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:43:14,791 INFO L321 Elim1Store]: treesize reduction 90, result has 27.4 percent of original size [2023-01-28 05:43:14,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 60 [2023-01-28 05:43:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:43:14,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:43:14,976 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-28 05:43:14,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-28 05:43:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:43:15,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300969274] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:43:15,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:43:15,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 5] total 19 [2023-01-28 05:43:15,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285410860] [2023-01-28 05:43:15,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:43:15,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 05:43:15,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:43:15,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 05:43:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-01-28 05:43:15,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 05:43:15,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 116 transitions, 1275 flow. Second operand has 21 states, 21 states have (on average 107.95238095238095) internal successors, (2267), 21 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:15,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:43:15,160 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 05:43:15,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:43:15,806 INFO L130 PetriNetUnfolder]: 586/1045 cut-off events. [2023-01-28 05:43:15,806 INFO L131 PetriNetUnfolder]: For 4506/4542 co-relation queries the response was YES. [2023-01-28 05:43:15,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5502 conditions, 1045 events. 586/1045 cut-off events. For 4506/4542 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5045 event pairs, 64 based on Foata normal form. 30/1064 useless extension candidates. Maximal degree in co-relation 4905. Up to 610 conditions per place. [2023-01-28 05:43:15,815 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 115 selfloop transitions, 80 changer transitions 2/203 dead transitions. [2023-01-28 05:43:15,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 203 transitions, 2226 flow [2023-01-28 05:43:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 05:43:15,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 05:43:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2236 transitions. [2023-01-28 05:43:15,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3149295774647887 [2023-01-28 05:43:15,819 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2236 transitions. [2023-01-28 05:43:15,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2236 transitions. [2023-01-28 05:43:15,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:43:15,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2236 transitions. [2023-01-28 05:43:15,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 111.8) internal successors, (2236), 20 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:15,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:15,865 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:15,865 INFO L175 Difference]: Start difference. First operand has 76 places, 116 transitions, 1275 flow. Second operand 20 states and 2236 transitions. [2023-01-28 05:43:15,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 203 transitions, 2226 flow [2023-01-28 05:43:15,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 203 transitions, 1978 flow, removed 122 selfloop flow, removed 2 redundant places. [2023-01-28 05:43:15,878 INFO L231 Difference]: Finished difference. Result has 98 places, 144 transitions, 1603 flow [2023-01-28 05:43:15,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1603, PETRI_PLACES=98, PETRI_TRANSITIONS=144} [2023-01-28 05:43:15,879 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 77 predicate places. [2023-01-28 05:43:15,879 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 144 transitions, 1603 flow [2023-01-28 05:43:15,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 107.95238095238095) internal successors, (2267), 21 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:15,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:43:15,880 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:43:15,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 05:43:16,085 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,SelfDestructingSolverStorable14 [2023-01-28 05:43:16,086 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:43:16,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:43:16,087 INFO L85 PathProgramCache]: Analyzing trace with hash -182781255, now seen corresponding path program 6 times [2023-01-28 05:43:16,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:43:16,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895124290] [2023-01-28 05:43:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:43:16,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:43:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:43:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:17,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:43:17,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895124290] [2023-01-28 05:43:17,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895124290] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:43:17,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994359528] [2023-01-28 05:43:17,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:43:17,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:17,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:43:17,011 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:43:17,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 05:43:17,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:43:17,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:43:17,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 05:43:17,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:43:17,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:17,329 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 05:43:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:43:17,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:43:17,493 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-28 05:43:17,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-28 05:43:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 05:43:17,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994359528] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:43:17,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:43:17,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-01-28 05:43:17,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319242009] [2023-01-28 05:43:17,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:43:17,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 05:43:17,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:43:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 05:43:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-01-28 05:43:17,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 05:43:17,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 144 transitions, 1603 flow. Second operand has 20 states, 20 states have (on average 108.15) internal successors, (2163), 20 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:17,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:43:17,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 05:43:17,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:43:18,250 INFO L130 PetriNetUnfolder]: 758/1356 cut-off events. [2023-01-28 05:43:18,250 INFO L131 PetriNetUnfolder]: For 5979/6017 co-relation queries the response was YES. [2023-01-28 05:43:18,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7013 conditions, 1356 events. 758/1356 cut-off events. For 5979/6017 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 6998 event pairs, 117 based on Foata normal form. 33/1378 useless extension candidates. Maximal degree in co-relation 6966. Up to 938 conditions per place. [2023-01-28 05:43:18,258 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 139 selfloop transitions, 70 changer transitions 1/216 dead transitions. [2023-01-28 05:43:18,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 216 transitions, 2546 flow [2023-01-28 05:43:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 05:43:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 05:43:18,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1894 transitions. [2023-01-28 05:43:18,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31383595691797844 [2023-01-28 05:43:18,260 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1894 transitions. [2023-01-28 05:43:18,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1894 transitions. [2023-01-28 05:43:18,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:43:18,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1894 transitions. [2023-01-28 05:43:18,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 111.41176470588235) internal successors, (1894), 17 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:18,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:18,266 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 355.0) internal successors, (6390), 18 states have internal predecessors, (6390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:18,266 INFO L175 Difference]: Start difference. First operand has 98 places, 144 transitions, 1603 flow. Second operand 17 states and 1894 transitions. [2023-01-28 05:43:18,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 216 transitions, 2546 flow [2023-01-28 05:43:18,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 216 transitions, 2383 flow, removed 53 selfloop flow, removed 9 redundant places. [2023-01-28 05:43:18,281 INFO L231 Difference]: Finished difference. Result has 109 places, 172 transitions, 2020 flow [2023-01-28 05:43:18,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2020, PETRI_PLACES=109, PETRI_TRANSITIONS=172} [2023-01-28 05:43:18,281 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 88 predicate places. [2023-01-28 05:43:18,281 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 172 transitions, 2020 flow [2023-01-28 05:43:18,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 108.15) internal successors, (2163), 20 states have internal predecessors, (2163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:18,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:43:18,282 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:43:18,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 05:43:18,486 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,SelfDestructingSolverStorable15 [2023-01-28 05:43:18,486 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:43:18,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:43:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash -2064264659, now seen corresponding path program 7 times [2023-01-28 05:43:18,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:43:18,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785163721] [2023-01-28 05:43:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:43:18,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:43:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:43:19,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:19,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:43:19,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785163721] [2023-01-28 05:43:19,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785163721] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:43:19,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491743704] [2023-01-28 05:43:19,220 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:43:19,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:19,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:43:19,222 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:43:19,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 05:43:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:43:19,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 05:43:19,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:43:19,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:19,428 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 05:43:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:43:19,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:43:19,620 INFO L321 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-01-28 05:43:19,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2023-01-28 05:43:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:43:19,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491743704] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:43:19,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:43:19,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 18 [2023-01-28 05:43:19,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292596915] [2023-01-28 05:43:19,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:43:19,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 05:43:19,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:43:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 05:43:19,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-01-28 05:43:19,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 355 [2023-01-28 05:43:19,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 172 transitions, 2020 flow. Second operand has 20 states, 20 states have (on average 115.15) internal successors, (2303), 20 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:19,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:43:19,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 355 [2023-01-28 05:43:19,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:43:20,362 INFO L130 PetriNetUnfolder]: 1038/1864 cut-off events. [2023-01-28 05:43:20,362 INFO L131 PetriNetUnfolder]: For 8651/8693 co-relation queries the response was YES. [2023-01-28 05:43:20,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9823 conditions, 1864 events. 1038/1864 cut-off events. For 8651/8693 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10420 event pairs, 189 based on Foata normal form. 37/1890 useless extension candidates. Maximal degree in co-relation 9771. Up to 1242 conditions per place. [2023-01-28 05:43:20,373 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 189 selfloop transitions, 80 changer transitions 2/277 dead transitions. [2023-01-28 05:43:20,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 277 transitions, 3452 flow [2023-01-28 05:43:20,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 05:43:20,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 05:43:20,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2372 transitions. [2023-01-28 05:43:20,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3340845070422535 [2023-01-28 05:43:20,376 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2372 transitions. [2023-01-28 05:43:20,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2372 transitions. [2023-01-28 05:43:20,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:43:20,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2372 transitions. [2023-01-28 05:43:20,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 118.6) internal successors, (2372), 20 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:20,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:20,381 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:20,382 INFO L175 Difference]: Start difference. First operand has 109 places, 172 transitions, 2020 flow. Second operand 20 states and 2372 transitions. [2023-01-28 05:43:20,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 277 transitions, 3452 flow [2023-01-28 05:43:20,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 277 transitions, 3292 flow, removed 57 selfloop flow, removed 8 redundant places. [2023-01-28 05:43:20,405 INFO L231 Difference]: Finished difference. Result has 126 places, 218 transitions, 2810 flow [2023-01-28 05:43:20,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=1880, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2810, PETRI_PLACES=126, PETRI_TRANSITIONS=218} [2023-01-28 05:43:20,405 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 105 predicate places. [2023-01-28 05:43:20,406 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 218 transitions, 2810 flow [2023-01-28 05:43:20,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 115.15) internal successors, (2303), 20 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:20,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:43:20,406 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:43:20,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-01-28 05:43:20,611 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,SelfDestructingSolverStorable16 [2023-01-28 05:43:20,611 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:43:20,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:43:20,611 INFO L85 PathProgramCache]: Analyzing trace with hash -927240523, now seen corresponding path program 8 times [2023-01-28 05:43:20,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:43:20,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327329799] [2023-01-28 05:43:20,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:43:20,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:43:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:43:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:21,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:43:21,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327329799] [2023-01-28 05:43:21,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327329799] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:43:21,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715309599] [2023-01-28 05:43:21,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:43:21,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:21,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:43:21,316 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:43:21,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 05:43:21,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:43:21,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:43:21,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 05:43:21,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:43:21,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:43:21,522 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 14 treesize of output 16 [2023-01-28 05:43:21,594 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:21,594 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 05:43:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:43:21,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:43:21,665 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_458 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_458) c_~f~0.base))) (= (select .cse0 (+ (* (select .cse0 (+ (* c_~x1~0 4) c_~f~0.offset)) 4) c_~f~0.offset)) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset)) 4))) 4)))))) is different from false [2023-01-28 05:43:21,729 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:21,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-01-28 05:43:21,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:21,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-01-28 05:43:22,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:43:22,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715309599] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:43:22,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:43:22,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-28 05:43:22,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046106894] [2023-01-28 05:43:22,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:43:22,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 05:43:22,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:43:22,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 05:43:22,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=437, Unknown=1, NotChecked=42, Total=552 [2023-01-28 05:43:22,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 355 [2023-01-28 05:43:22,593 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 218 transitions, 2810 flow. Second operand has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:22,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:43:22,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 355 [2023-01-28 05:43:22,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:43:23,890 INFO L130 PetriNetUnfolder]: 1315/2368 cut-off events. [2023-01-28 05:43:23,890 INFO L131 PetriNetUnfolder]: For 12875/12917 co-relation queries the response was YES. [2023-01-28 05:43:23,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13103 conditions, 2368 events. 1315/2368 cut-off events. For 12875/12917 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13799 event pairs, 202 based on Foata normal form. 36/2393 useless extension candidates. Maximal degree in co-relation 13044. Up to 1492 conditions per place. [2023-01-28 05:43:23,913 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 188 selfloop transitions, 138 changer transitions 2/334 dead transitions. [2023-01-28 05:43:23,913 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 334 transitions, 4559 flow [2023-01-28 05:43:23,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 05:43:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 05:43:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2522 transitions. [2023-01-28 05:43:23,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3229193341869398 [2023-01-28 05:43:23,931 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2522 transitions. [2023-01-28 05:43:23,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2522 transitions. [2023-01-28 05:43:23,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:43:23,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2522 transitions. [2023-01-28 05:43:23,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 114.63636363636364) internal successors, (2522), 22 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:23,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:23,939 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 355.0) internal successors, (8165), 23 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:23,939 INFO L175 Difference]: Start difference. First operand has 126 places, 218 transitions, 2810 flow. Second operand 22 states and 2522 transitions. [2023-01-28 05:43:23,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 334 transitions, 4559 flow [2023-01-28 05:43:23,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 334 transitions, 4319 flow, removed 106 selfloop flow, removed 6 redundant places. [2023-01-28 05:43:23,978 INFO L231 Difference]: Finished difference. Result has 148 places, 273 transitions, 3840 flow [2023-01-28 05:43:23,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=2570, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3840, PETRI_PLACES=148, PETRI_TRANSITIONS=273} [2023-01-28 05:43:23,979 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-01-28 05:43:23,979 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 273 transitions, 3840 flow [2023-01-28 05:43:23,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 110.70833333333333) internal successors, (2657), 24 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:43:23,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:43:23,979 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:43:23,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-28 05:43:24,184 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,SelfDestructingSolverStorable17 [2023-01-28 05:43:24,184 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:43:24,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:43:24,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1798676721, now seen corresponding path program 9 times [2023-01-28 05:43:24,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:43:24,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403314668] [2023-01-28 05:43:24,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:43:24,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:43:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:43:25,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:25,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:43:25,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403314668] [2023-01-28 05:43:25,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403314668] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:43:25,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652643181] [2023-01-28 05:43:25,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:43:25,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:43:25,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:43:25,229 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:43:25,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 05:43:25,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 05:43:25,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:43:25,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-28 05:43:25,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:43:25,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 05:43:25,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:43:25,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:43:25,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 05:43:25,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:25,714 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 47 [2023-01-28 05:43:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:43:25,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:43:26,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:26,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 371 treesize of output 215 [2023-01-28 05:43:26,197 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:26,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 998 treesize of output 1106 [2023-01-28 05:43:26,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:26,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 440 treesize of output 574 [2023-01-28 05:43:26,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:43:26,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 367 treesize of output 389 [2023-01-28 05:46:11,795 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 05:46:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:46:12,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652643181] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:46:12,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:46:12,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-28 05:46:12,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434477983] [2023-01-28 05:46:12,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:46:12,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 05:46:12,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:46:12,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 05:46:12,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=595, Unknown=2, NotChecked=0, Total=702 [2023-01-28 05:46:12,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 05:46:12,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 273 transitions, 3840 flow. Second operand has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:12,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:46:12,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 05:46:12,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:46:14,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:46:16,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:46:19,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:46:24,395 INFO L130 PetriNetUnfolder]: 1850/3344 cut-off events. [2023-01-28 05:46:24,395 INFO L131 PetriNetUnfolder]: For 24805/24917 co-relation queries the response was YES. [2023-01-28 05:46:24,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20628 conditions, 3344 events. 1850/3344 cut-off events. For 24805/24917 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 21133 event pairs, 321 based on Foata normal form. 106/3437 useless extension candidates. Maximal degree in co-relation 20110. Up to 1877 conditions per place. [2023-01-28 05:46:24,417 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 238 selfloop transitions, 217 changer transitions 2/463 dead transitions. [2023-01-28 05:46:24,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 463 transitions, 6805 flow [2023-01-28 05:46:24,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 05:46:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 05:46:24,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3028 transitions. [2023-01-28 05:46:24,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31591027647365677 [2023-01-28 05:46:24,420 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3028 transitions. [2023-01-28 05:46:24,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3028 transitions. [2023-01-28 05:46:24,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:46:24,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3028 transitions. [2023-01-28 05:46:24,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 112.14814814814815) internal successors, (3028), 27 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:24,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 355.0) internal successors, (9940), 28 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:24,428 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 355.0) internal successors, (9940), 28 states have internal predecessors, (9940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:24,428 INFO L175 Difference]: Start difference. First operand has 148 places, 273 transitions, 3840 flow. Second operand 27 states and 3028 transitions. [2023-01-28 05:46:24,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 463 transitions, 6805 flow [2023-01-28 05:46:24,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 463 transitions, 6451 flow, removed 159 selfloop flow, removed 6 redundant places. [2023-01-28 05:46:24,487 INFO L231 Difference]: Finished difference. Result has 173 places, 377 transitions, 5818 flow [2023-01-28 05:46:24,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=3574, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5818, PETRI_PLACES=173, PETRI_TRANSITIONS=377} [2023-01-28 05:46:24,487 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 152 predicate places. [2023-01-28 05:46:24,487 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 377 transitions, 5818 flow [2023-01-28 05:46:24,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 107.55555555555556) internal successors, (2904), 27 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:24,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:46:24,488 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:46:24,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 05:46:24,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:46:24,690 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:46:24,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:46:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1813313051, now seen corresponding path program 10 times [2023-01-28 05:46:24,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:46:24,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797198987] [2023-01-28 05:46:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:46:24,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:46:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:46:25,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:46:25,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:46:25,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797198987] [2023-01-28 05:46:25,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797198987] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:46:25,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070056818] [2023-01-28 05:46:25,712 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:46:25,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:46:25,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:46:25,713 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:46:25,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 05:46:25,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:46:25,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:46:25,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 05:46:25,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:46:25,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:46:25,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 05:46:25,975 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:46:25,975 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 05:46:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:46:25,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:46:26,156 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:46:26,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 230 [2023-01-28 05:46:26,217 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:46:26,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 37 treesize of output 136 [2023-01-28 05:46:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:46:26,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070056818] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:46:26,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:46:26,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-28 05:46:26,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673005116] [2023-01-28 05:46:26,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:46:26,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 05:46:26,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:46:26,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 05:46:26,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=475, Unknown=4, NotChecked=0, Total=552 [2023-01-28 05:46:26,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 05:46:26,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 377 transitions, 5818 flow. Second operand has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:26,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:46:26,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 05:46:26,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:46:31,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:46:32,582 INFO L130 PetriNetUnfolder]: 2120/3838 cut-off events. [2023-01-28 05:46:32,582 INFO L131 PetriNetUnfolder]: For 31757/31847 co-relation queries the response was YES. [2023-01-28 05:46:32,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24931 conditions, 3838 events. 2120/3838 cut-off events. For 31757/31847 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 25102 event pairs, 353 based on Foata normal form. 86/3911 useless extension candidates. Maximal degree in co-relation 24392. Up to 2747 conditions per place. [2023-01-28 05:46:32,617 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 312 selfloop transitions, 155 changer transitions 2/475 dead transitions. [2023-01-28 05:46:32,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 475 transitions, 7896 flow [2023-01-28 05:46:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 05:46:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 05:46:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2344 transitions. [2023-01-28 05:46:32,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31441985244802145 [2023-01-28 05:46:32,622 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2344 transitions. [2023-01-28 05:46:32,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2344 transitions. [2023-01-28 05:46:32,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:46:32,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2344 transitions. [2023-01-28 05:46:32,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 111.61904761904762) internal successors, (2344), 21 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:32,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:32,631 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 355.0) internal successors, (7810), 22 states have internal predecessors, (7810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:32,631 INFO L175 Difference]: Start difference. First operand has 173 places, 377 transitions, 5818 flow. Second operand 21 states and 2344 transitions. [2023-01-28 05:46:32,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 475 transitions, 7896 flow [2023-01-28 05:46:32,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 475 transitions, 7453 flow, removed 194 selfloop flow, removed 10 redundant places. [2023-01-28 05:46:32,769 INFO L231 Difference]: Finished difference. Result has 188 places, 414 transitions, 6654 flow [2023-01-28 05:46:32,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6654, PETRI_PLACES=188, PETRI_TRANSITIONS=414} [2023-01-28 05:46:32,770 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 167 predicate places. [2023-01-28 05:46:32,771 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 414 transitions, 6654 flow [2023-01-28 05:46:32,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.79166666666667) internal successors, (2587), 24 states have internal predecessors, (2587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:32,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:46:32,771 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:46:32,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 05:46:32,975 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,SelfDestructingSolverStorable19 [2023-01-28 05:46:32,975 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:46:32,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:46:32,975 INFO L85 PathProgramCache]: Analyzing trace with hash 190166667, now seen corresponding path program 11 times [2023-01-28 05:46:32,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:46:32,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509871089] [2023-01-28 05:46:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:46:32,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:46:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:46:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:46:33,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:46:33,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509871089] [2023-01-28 05:46:33,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509871089] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:46:33,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132121620] [2023-01-28 05:46:33,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:46:33,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:46:33,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:46:33,710 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:46:33,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 05:46:33,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:46:33,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:46:33,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 05:46:33,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:46:34,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:46:34,017 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 26 treesize of output 24 [2023-01-28 05:46:34,053 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:46:34,092 INFO L321 Elim1Store]: treesize reduction 86, result has 30.6 percent of original size [2023-01-28 05:46:34,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 41 treesize of output 64 [2023-01-28 05:46:34,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:46:34,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:46:34,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:46:34,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 218 [2023-01-28 05:46:34,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:46:34,339 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 56 [2023-01-28 05:46:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:46:35,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132121620] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:46:35,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:46:35,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-28 05:46:35,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999090766] [2023-01-28 05:46:35,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:46:35,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 05:46:35,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:46:35,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 05:46:35,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=485, Unknown=4, NotChecked=0, Total=552 [2023-01-28 05:46:35,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 05:46:35,004 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 414 transitions, 6654 flow. Second operand has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:35,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:46:35,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 05:46:35,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:46:39,370 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] [2023-01-28 05:46:41,598 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] [2023-01-28 05:46:42,486 INFO L130 PetriNetUnfolder]: 2590/4698 cut-off events. [2023-01-28 05:46:42,486 INFO L131 PetriNetUnfolder]: For 45784/45914 co-relation queries the response was YES. [2023-01-28 05:46:42,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31210 conditions, 4698 events. 2590/4698 cut-off events. For 45784/45914 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31938 event pairs, 483 based on Foata normal form. 125/4810 useless extension candidates. Maximal degree in co-relation 30303. Up to 2699 conditions per place. [2023-01-28 05:46:42,548 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 300 selfloop transitions, 268 changer transitions 3/577 dead transitions. [2023-01-28 05:46:42,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 577 transitions, 10072 flow [2023-01-28 05:46:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 05:46:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 05:46:42,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2585 transitions. [2023-01-28 05:46:42,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3165952235150031 [2023-01-28 05:46:42,556 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2585 transitions. [2023-01-28 05:46:42,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2585 transitions. [2023-01-28 05:46:42,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:46:42,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2585 transitions. [2023-01-28 05:46:42,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 112.3913043478261) internal successors, (2585), 23 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:42,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:42,566 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:42,566 INFO L175 Difference]: Start difference. First operand has 188 places, 414 transitions, 6654 flow. Second operand 23 states and 2585 transitions. [2023-01-28 05:46:42,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 577 transitions, 10072 flow [2023-01-28 05:46:42,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 577 transitions, 9778 flow, removed 108 selfloop flow, removed 9 redundant places. [2023-01-28 05:46:42,707 INFO L231 Difference]: Finished difference. Result has 207 places, 498 transitions, 8985 flow [2023-01-28 05:46:42,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=8985, PETRI_PLACES=207, PETRI_TRANSITIONS=498} [2023-01-28 05:46:42,708 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 186 predicate places. [2023-01-28 05:46:42,708 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 498 transitions, 8985 flow [2023-01-28 05:46:42,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:42,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:46:42,709 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:46:42,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 05:46:42,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:46:42,913 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:46:42,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:46:42,913 INFO L85 PathProgramCache]: Analyzing trace with hash -350264867, now seen corresponding path program 12 times [2023-01-28 05:46:42,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:46:42,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515091396] [2023-01-28 05:46:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:46:42,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:46:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:46:44,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:46:44,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:46:44,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515091396] [2023-01-28 05:46:44,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515091396] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:46:44,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013392546] [2023-01-28 05:46:44,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:46:44,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:46:44,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:46:44,152 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:46:44,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 05:46:44,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:46:44,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:46:44,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 05:46:44,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:46:44,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:46:44,513 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 20 treesize of output 20 [2023-01-28 05:46:44,599 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:46:44,600 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2023-01-28 05:46:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:46:44,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:46:46,768 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_601 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_601) c_~f~0.base))) (= (select .cse0 (+ c_~f~0.offset (* (select (select |c_#memory_int| c_~f~0.base) (+ (* c_~x1~0 4) c_~f~0.offset)) 4))) (select .cse0 (+ c_~f~0.offset (* (select .cse0 (+ c_~f~0.offset (* 4 (select .cse0 (+ (* c_~x2~0 4) c_~f~0.offset))))) 4)))))) is different from false [2023-01-28 05:46:46,835 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:46:46,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 224 [2023-01-28 05:46:46,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:46:46,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 88 [2023-01-28 05:46:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2023-01-28 05:46:47,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013392546] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:46:47,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:46:47,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-01-28 05:46:47,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565665837] [2023-01-28 05:46:47,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:46:47,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 05:46:47,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:46:47,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 05:46:47,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=434, Unknown=9, NotChecked=42, Total=552 [2023-01-28 05:46:47,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 355 [2023-01-28 05:46:47,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 498 transitions, 8985 flow. Second operand has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:47,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:46:47,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 355 [2023-01-28 05:46:47,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:46:50,250 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] [2023-01-28 05:46:55,301 INFO L130 PetriNetUnfolder]: 2816/5109 cut-off events. [2023-01-28 05:46:55,301 INFO L131 PetriNetUnfolder]: For 61778/61880 co-relation queries the response was YES. [2023-01-28 05:46:55,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35880 conditions, 5109 events. 2816/5109 cut-off events. For 61778/61880 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35424 event pairs, 610 based on Foata normal form. 97/5193 useless extension candidates. Maximal degree in co-relation 34867. Up to 3731 conditions per place. [2023-01-28 05:46:55,337 INFO L137 encePairwiseOnDemand]: 346/355 looper letters, 368 selfloop transitions, 217 changer transitions 2/593 dead transitions. [2023-01-28 05:46:55,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 593 transitions, 11415 flow [2023-01-28 05:46:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 05:46:55,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 05:46:55,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2233 transitions. [2023-01-28 05:46:55,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3145070422535211 [2023-01-28 05:46:55,339 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2233 transitions. [2023-01-28 05:46:55,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2233 transitions. [2023-01-28 05:46:55,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:46:55,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2233 transitions. [2023-01-28 05:46:55,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 111.65) internal successors, (2233), 20 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:55,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:55,344 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 355.0) internal successors, (7455), 21 states have internal predecessors, (7455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:55,344 INFO L175 Difference]: Start difference. First operand has 207 places, 498 transitions, 8985 flow. Second operand 20 states and 2233 transitions. [2023-01-28 05:46:55,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 593 transitions, 11415 flow [2023-01-28 05:46:55,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 593 transitions, 10785 flow, removed 276 selfloop flow, removed 8 redundant places. [2023-01-28 05:46:55,536 INFO L231 Difference]: Finished difference. Result has 223 places, 538 transitions, 9902 flow [2023-01-28 05:46:55,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=8429, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9902, PETRI_PLACES=223, PETRI_TRANSITIONS=538} [2023-01-28 05:46:55,537 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 202 predicate places. [2023-01-28 05:46:55,537 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 538 transitions, 9902 flow [2023-01-28 05:46:55,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 107.70833333333333) internal successors, (2585), 24 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:55,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:46:55,537 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:46:55,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 05:46:55,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:46:55,743 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:46:55,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:46:55,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2040900387, now seen corresponding path program 13 times [2023-01-28 05:46:55,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:46:55,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010166164] [2023-01-28 05:46:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:46:55,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:46:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:46:55,899 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:46:55,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:46:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010166164] [2023-01-28 05:46:55,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010166164] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:46:55,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225628053] [2023-01-28 05:46:55,899 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:46:55,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:46:55,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:46:55,900 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:46:55,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 05:46:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:46:55,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:46:55,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:46:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:46:56,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:46:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:46:58,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225628053] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:46:58,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:46:58,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-01-28 05:46:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532302316] [2023-01-28 05:46:58,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:46:58,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 05:46:58,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:46:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 05:46:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=167, Unknown=1, NotChecked=0, Total=210 [2023-01-28 05:46:58,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:46:58,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 538 transitions, 9902 flow. Second operand has 15 states, 15 states have (on average 138.06666666666666) internal successors, (2071), 15 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:46:58,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:46:58,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:46:58,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:47:16,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:47:24,093 INFO L130 PetriNetUnfolder]: 6811/12429 cut-off events. [2023-01-28 05:47:24,093 INFO L131 PetriNetUnfolder]: For 131803/131803 co-relation queries the response was YES. [2023-01-28 05:47:24,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88927 conditions, 12429 events. 6811/12429 cut-off events. For 131803/131803 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 98888 event pairs, 939 based on Foata normal form. 157/12586 useless extension candidates. Maximal degree in co-relation 87892. Up to 5496 conditions per place. [2023-01-28 05:47:24,219 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 750 selfloop transitions, 462 changer transitions 0/1212 dead transitions. [2023-01-28 05:47:24,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 1212 transitions, 24163 flow [2023-01-28 05:47:24,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 05:47:24,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 05:47:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2592 transitions. [2023-01-28 05:47:24,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4056338028169014 [2023-01-28 05:47:24,221 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2592 transitions. [2023-01-28 05:47:24,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2592 transitions. [2023-01-28 05:47:24,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:47:24,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2592 transitions. [2023-01-28 05:47:24,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 144.0) internal successors, (2592), 18 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:24,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:24,227 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 355.0) internal successors, (6745), 19 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:24,227 INFO L175 Difference]: Start difference. First operand has 223 places, 538 transitions, 9902 flow. Second operand 18 states and 2592 transitions. [2023-01-28 05:47:24,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 1212 transitions, 24163 flow [2023-01-28 05:47:24,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 1212 transitions, 23298 flow, removed 277 selfloop flow, removed 11 redundant places. [2023-01-28 05:47:24,795 INFO L231 Difference]: Finished difference. Result has 239 places, 852 transitions, 17808 flow [2023-01-28 05:47:24,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=9442, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=17808, PETRI_PLACES=239, PETRI_TRANSITIONS=852} [2023-01-28 05:47:24,796 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 218 predicate places. [2023-01-28 05:47:24,796 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 852 transitions, 17808 flow [2023-01-28 05:47:24,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 138.06666666666666) internal successors, (2071), 15 states have internal predecessors, (2071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:24,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:47:24,797 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:47:24,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 05:47:25,001 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,SelfDestructingSolverStorable22 [2023-01-28 05:47:25,002 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:47:25,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:47:25,002 INFO L85 PathProgramCache]: Analyzing trace with hash 436220956, now seen corresponding path program 14 times [2023-01-28 05:47:25,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:47:25,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193186519] [2023-01-28 05:47:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:47:25,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:47:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:47:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:25,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:47:25,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193186519] [2023-01-28 05:47:25,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193186519] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:47:25,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107327949] [2023-01-28 05:47:25,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:47:25,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:47:25,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:47:25,166 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:47:25,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 05:47:25,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:47:25,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:47:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:47:25,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:47:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:25,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:47:25,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:25,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107327949] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:47:25,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:47:25,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-28 05:47:25,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183310353] [2023-01-28 05:47:25,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:47:25,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 05:47:25,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:47:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 05:47:25,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-01-28 05:47:25,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:47:25,785 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 852 transitions, 17808 flow. Second operand has 16 states, 16 states have (on average 138.0) internal successors, (2208), 16 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:25,785 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:47:25,785 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:47:25,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:47:29,796 INFO L130 PetriNetUnfolder]: 6890/12811 cut-off events. [2023-01-28 05:47:29,797 INFO L131 PetriNetUnfolder]: For 209157/209157 co-relation queries the response was YES. [2023-01-28 05:47:29,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98458 conditions, 12811 events. 6890/12811 cut-off events. For 209157/209157 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 107087 event pairs, 1190 based on Foata normal form. 116/12927 useless extension candidates. Maximal degree in co-relation 97243. Up to 5677 conditions per place. [2023-01-28 05:47:29,895 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1062 selfloop transitions, 321 changer transitions 41/1424 dead transitions. [2023-01-28 05:47:29,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 1424 transitions, 32661 flow [2023-01-28 05:47:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 05:47:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 05:47:29,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2267 transitions. [2023-01-28 05:47:29,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39911971830985915 [2023-01-28 05:47:29,899 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2267 transitions. [2023-01-28 05:47:29,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2267 transitions. [2023-01-28 05:47:29,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:47:29,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2267 transitions. [2023-01-28 05:47:29,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 141.6875) internal successors, (2267), 16 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:29,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:29,904 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 355.0) internal successors, (6035), 17 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:29,904 INFO L175 Difference]: Start difference. First operand has 239 places, 852 transitions, 17808 flow. Second operand 16 states and 2267 transitions. [2023-01-28 05:47:29,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 1424 transitions, 32661 flow [2023-01-28 05:47:30,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1424 transitions, 31161 flow, removed 639 selfloop flow, removed 4 redundant places. [2023-01-28 05:47:30,713 INFO L231 Difference]: Finished difference. Result has 256 places, 1011 transitions, 20990 flow [2023-01-28 05:47:30,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=16722, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=20990, PETRI_PLACES=256, PETRI_TRANSITIONS=1011} [2023-01-28 05:47:30,713 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 235 predicate places. [2023-01-28 05:47:30,714 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 1011 transitions, 20990 flow [2023-01-28 05:47:30,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 138.0) internal successors, (2208), 16 states have internal predecessors, (2208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:30,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:47:30,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:47:30,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-28 05:47:30,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:47:30,919 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:47:30,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:47:30,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1497674120, now seen corresponding path program 15 times [2023-01-28 05:47:30,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:47:30,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791152395] [2023-01-28 05:47:30,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:47:30,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:47:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:47:31,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:31,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:47:31,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791152395] [2023-01-28 05:47:31,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791152395] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:47:31,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439227693] [2023-01-28 05:47:31,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:47:31,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:47:31,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:47:31,068 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:47:31,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 05:47:31,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 05:47:31,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:47:31,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:47:31,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:47:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:31,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:47:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:31,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439227693] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:47:31,561 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:47:31,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-01-28 05:47:31,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525827694] [2023-01-28 05:47:31,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:47:31,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 05:47:31,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:47:31,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 05:47:31,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-01-28 05:47:31,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:47:31,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 1011 transitions, 20990 flow. Second operand has 20 states, 20 states have (on average 137.65) internal successors, (2753), 20 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:31,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:47:31,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:47:31,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:47:37,149 INFO L130 PetriNetUnfolder]: 6974/12934 cut-off events. [2023-01-28 05:47:37,149 INFO L131 PetriNetUnfolder]: For 218489/218489 co-relation queries the response was YES. [2023-01-28 05:47:37,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106695 conditions, 12934 events. 6974/12934 cut-off events. For 218489/218489 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 105806 event pairs, 3170 based on Foata normal form. 22/12956 useless extension candidates. Maximal degree in co-relation 105380. Up to 9880 conditions per place. [2023-01-28 05:47:37,262 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 801 selfloop transitions, 426 changer transitions 6/1233 dead transitions. [2023-01-28 05:47:37,262 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1233 transitions, 27394 flow [2023-01-28 05:47:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 05:47:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 05:47:37,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3552 transitions. [2023-01-28 05:47:37,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40022535211267607 [2023-01-28 05:47:37,265 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3552 transitions. [2023-01-28 05:47:37,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3552 transitions. [2023-01-28 05:47:37,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:47:37,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3552 transitions. [2023-01-28 05:47:37,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 142.08) internal successors, (3552), 25 states have internal predecessors, (3552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:37,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 355.0) internal successors, (9230), 26 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:37,285 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 355.0) internal successors, (9230), 26 states have internal predecessors, (9230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:37,285 INFO L175 Difference]: Start difference. First operand has 256 places, 1011 transitions, 20990 flow. Second operand 25 states and 3552 transitions. [2023-01-28 05:47:37,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1233 transitions, 27394 flow [2023-01-28 05:47:38,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 1233 transitions, 26308 flow, removed 543 selfloop flow, removed 2 redundant places. [2023-01-28 05:47:38,879 INFO L231 Difference]: Finished difference. Result has 290 places, 1101 transitions, 23277 flow [2023-01-28 05:47:38,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=20062, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=23277, PETRI_PLACES=290, PETRI_TRANSITIONS=1101} [2023-01-28 05:47:38,881 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 269 predicate places. [2023-01-28 05:47:38,881 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 1101 transitions, 23277 flow [2023-01-28 05:47:38,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 137.65) internal successors, (2753), 20 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:38,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:47:38,882 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:47:38,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 05:47:39,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:47:39,085 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:47:39,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:47:39,085 INFO L85 PathProgramCache]: Analyzing trace with hash 2120764327, now seen corresponding path program 16 times [2023-01-28 05:47:39,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:47:39,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994373496] [2023-01-28 05:47:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:47:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:47:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:47:39,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:39,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:47:39,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994373496] [2023-01-28 05:47:39,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994373496] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:47:39,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145925526] [2023-01-28 05:47:39,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:47:39,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:47:39,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:47:39,219 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:47:39,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 05:47:39,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:47:39,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:47:39,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:47:39,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:47:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:39,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:47:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:39,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145925526] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:47:39,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:47:39,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 05:47:39,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811868530] [2023-01-28 05:47:39,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:47:39,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:47:39,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:47:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:47:39,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-01-28 05:47:39,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:47:39,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 1101 transitions, 23277 flow. Second operand has 18 states, 18 states have (on average 137.94444444444446) internal successors, (2483), 18 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:39,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:47:39,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:47:39,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:47:48,227 INFO L130 PetriNetUnfolder]: 7436/13740 cut-off events. [2023-01-28 05:47:48,228 INFO L131 PetriNetUnfolder]: For 261877/261877 co-relation queries the response was YES. [2023-01-28 05:47:48,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118623 conditions, 13740 events. 7436/13740 cut-off events. For 261877/261877 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 113267 event pairs, 976 based on Foata normal form. 157/13897 useless extension candidates. Maximal degree in co-relation 117373. Up to 6069 conditions per place. [2023-01-28 05:47:48,363 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 879 selfloop transitions, 716 changer transitions 3/1598 dead transitions. [2023-01-28 05:47:48,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1598 transitions, 35133 flow [2023-01-28 05:47:48,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 05:47:48,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 05:47:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3302 transitions. [2023-01-28 05:47:48,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40440906307409674 [2023-01-28 05:47:48,367 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3302 transitions. [2023-01-28 05:47:48,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3302 transitions. [2023-01-28 05:47:48,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:47:48,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3302 transitions. [2023-01-28 05:47:48,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 143.56521739130434) internal successors, (3302), 23 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:48,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:48,386 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 355.0) internal successors, (8520), 24 states have internal predecessors, (8520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:48,386 INFO L175 Difference]: Start difference. First operand has 290 places, 1101 transitions, 23277 flow. Second operand 23 states and 3302 transitions. [2023-01-28 05:47:48,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1598 transitions, 35133 flow [2023-01-28 05:47:50,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 1598 transitions, 33919 flow, removed 334 selfloop flow, removed 6 redundant places. [2023-01-28 05:47:50,248 INFO L231 Difference]: Finished difference. Result has 314 places, 1211 transitions, 26305 flow [2023-01-28 05:47:50,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=22077, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=606, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=26305, PETRI_PLACES=314, PETRI_TRANSITIONS=1211} [2023-01-28 05:47:50,249 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 293 predicate places. [2023-01-28 05:47:50,249 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 1211 transitions, 26305 flow [2023-01-28 05:47:50,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.94444444444446) internal successors, (2483), 18 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:50,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:47:50,250 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:47:50,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 05:47:50,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:47:50,452 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:47:50,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:47:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash -759470750, now seen corresponding path program 17 times [2023-01-28 05:47:50,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:47:50,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451513668] [2023-01-28 05:47:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:47:50,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:47:50,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:47:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:50,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:47:50,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451513668] [2023-01-28 05:47:50,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451513668] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:47:50,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128585500] [2023-01-28 05:47:50,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:47:50,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:47:50,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:47:50,627 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:47:50,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 05:47:50,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:47:50,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:47:50,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:47:50,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:47:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:50,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:47:51,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:47:51,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128585500] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:47:51,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:47:51,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-28 05:47:51,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469734824] [2023-01-28 05:47:51,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:47:51,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 05:47:51,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:47:51,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 05:47:51,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-01-28 05:47:51,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:47:51,081 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 1211 transitions, 26305 flow. Second operand has 19 states, 19 states have (on average 137.78947368421052) internal successors, (2618), 19 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:51,081 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:47:51,081 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:47:51,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:47:59,745 INFO L130 PetriNetUnfolder]: 7902/16149 cut-off events. [2023-01-28 05:47:59,746 INFO L131 PetriNetUnfolder]: For 405706/405706 co-relation queries the response was YES. [2023-01-28 05:47:59,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146292 conditions, 16149 events. 7902/16149 cut-off events. For 405706/405706 co-relation queries the response was YES. Maximal size of possible extension queue 1049. Compared 153924 event pairs, 1394 based on Foata normal form. 48/16197 useless extension candidates. Maximal degree in co-relation 144446. Up to 7066 conditions per place. [2023-01-28 05:47:59,937 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1157 selfloop transitions, 751 changer transitions 11/1919 dead transitions. [2023-01-28 05:47:59,937 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1919 transitions, 46024 flow [2023-01-28 05:47:59,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 05:47:59,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 05:47:59,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 4940 transitions. [2023-01-28 05:47:59,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39758551307847084 [2023-01-28 05:47:59,943 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 4940 transitions. [2023-01-28 05:47:59,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 4940 transitions. [2023-01-28 05:47:59,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:47:59,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 4940 transitions. [2023-01-28 05:47:59,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 141.14285714285714) internal successors, (4940), 35 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:59,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:59,971 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 355.0) internal successors, (12780), 36 states have internal predecessors, (12780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:47:59,971 INFO L175 Difference]: Start difference. First operand has 314 places, 1211 transitions, 26305 flow. Second operand 35 states and 4940 transitions. [2023-01-28 05:47:59,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1919 transitions, 46024 flow [2023-01-28 05:48:03,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1919 transitions, 44965 flow, removed 382 selfloop flow, removed 5 redundant places. [2023-01-28 05:48:03,166 INFO L231 Difference]: Finished difference. Result has 346 places, 1539 transitions, 35866 flow [2023-01-28 05:48:03,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=25019, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=35866, PETRI_PLACES=346, PETRI_TRANSITIONS=1539} [2023-01-28 05:48:03,168 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 325 predicate places. [2023-01-28 05:48:03,168 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 1539 transitions, 35866 flow [2023-01-28 05:48:03,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.78947368421052) internal successors, (2618), 19 states have internal predecessors, (2618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:48:03,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:48:03,168 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:48:03,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 05:48:03,373 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,SelfDestructingSolverStorable26 [2023-01-28 05:48:03,373 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:48:03,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:48:03,374 INFO L85 PathProgramCache]: Analyzing trace with hash 271090373, now seen corresponding path program 18 times [2023-01-28 05:48:03,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:48:03,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716307094] [2023-01-28 05:48:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:48:03,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:48:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:48:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:48:03,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:48:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716307094] [2023-01-28 05:48:03,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716307094] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:48:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538043134] [2023-01-28 05:48:03,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:48:03,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:48:03,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:48:03,482 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:48:03,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 05:48:03,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:48:03,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:48:03,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:48:03,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:48:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:48:03,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:48:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:48:04,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538043134] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:48:04,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:48:04,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-01-28 05:48:04,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109379776] [2023-01-28 05:48:04,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:48:04,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 05:48:04,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:48:04,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 05:48:04,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-01-28 05:48:04,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:48:04,467 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 1539 transitions, 35866 flow. Second operand has 17 states, 17 states have (on average 137.76470588235293) internal successors, (2342), 17 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:48:04,467 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:48:04,467 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:48:04,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:48:54,614 WARN L222 SmtUtils]: Spent 31.22s on a formula simplification. DAG size of input: 50 DAG size of output: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:48:56,634 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (div |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296))) (and (forall ((~n~0 Int)) (let ((.cse0 (* 3 ~n~0))) (or (<= (mod .cse0 4294967296) (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296)) (<= (+ (* 4294967296 (div .cse0 4294967296)) 4) .cse0)))) (<= (div |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) .cse1) (forall ((~n~0 Int)) (let ((.cse2 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse2 4294967296)) 4) .cse2) (<= (mod .cse2 4294967296) (mod (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) 4294967296))))) (let ((.cse3 (* 3 c_~n~0))) (<= (+ (* (div .cse3 4294967296) 4294967296) |c_thread2Thread1of1ForFork1_~i~1#1| 1) (+ (* .cse1 4294967296) .cse3))) (forall ((~n~0 Int)) (let ((.cse4 (* 3 ~n~0))) (or (<= (mod .cse4 4294967296) (mod (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|) 4294967296)) (<= (+ (* 4294967296 (div .cse4 4294967296)) 4) .cse4)))) (forall ((~n~0 Int)) (let ((.cse5 (* 3 ~n~0))) (or (<= (mod .cse5 4294967296) (mod (+ 3 |c_thread1Thread1of1ForFork0_~i~0#1|) 4294967296)) (<= (+ (* 4294967296 (div .cse5 4294967296)) 4) .cse5)))) (<= |c_thread2Thread1of1ForFork1_~i~1#1| |c_thread1Thread1of1ForFork0_~i~0#1|))) is different from false [2023-01-28 05:49:01,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:49:03,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:49:12,986 WARN L222 SmtUtils]: Spent 5.70s on a formula simplification. DAG size of input: 44 DAG size of output: 37 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:49:16,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:49:18,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:49:21,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:49:29,390 WARN L222 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 45 DAG size of output: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:49:31,463 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:49:46,843 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:50:02,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:50:04,931 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:50:14,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:50:26,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:50:28,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:50:32,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:50:38,652 INFO L130 PetriNetUnfolder]: 8544/17499 cut-off events. [2023-01-28 05:50:38,652 INFO L131 PetriNetUnfolder]: For 510445/510445 co-relation queries the response was YES. [2023-01-28 05:50:38,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167029 conditions, 17499 events. 8544/17499 cut-off events. For 510445/510445 co-relation queries the response was YES. Maximal size of possible extension queue 1152. Compared 167494 event pairs, 1749 based on Foata normal form. 99/17598 useless extension candidates. Maximal degree in co-relation 165106. Up to 7497 conditions per place. [2023-01-28 05:50:38,853 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 1048 selfloop transitions, 1158 changer transitions 6/2212 dead transitions. [2023-01-28 05:50:38,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 2212 transitions, 53107 flow [2023-01-28 05:50:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-28 05:50:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-28 05:50:38,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 6403 transitions. [2023-01-28 05:50:38,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40081377151799685 [2023-01-28 05:50:38,861 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 6403 transitions. [2023-01-28 05:50:38,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 6403 transitions. [2023-01-28 05:50:38,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:50:38,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 6403 transitions. [2023-01-28 05:50:38,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 142.2888888888889) internal successors, (6403), 45 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:50:38,873 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 355.0) internal successors, (16330), 46 states have internal predecessors, (16330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:50:38,873 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 355.0) internal successors, (16330), 46 states have internal predecessors, (16330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:50:38,873 INFO L175 Difference]: Start difference. First operand has 346 places, 1539 transitions, 35866 flow. Second operand 45 states and 6403 transitions. [2023-01-28 05:50:38,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 2212 transitions, 53107 flow [2023-01-28 05:50:42,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 2212 transitions, 51731 flow, removed 369 selfloop flow, removed 15 redundant places. [2023-01-28 05:50:42,976 INFO L231 Difference]: Finished difference. Result has 387 places, 1706 transitions, 42274 flow [2023-01-28 05:50:42,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=34689, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1011, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=42274, PETRI_PLACES=387, PETRI_TRANSITIONS=1706} [2023-01-28 05:50:42,977 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 366 predicate places. [2023-01-28 05:50:42,977 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1706 transitions, 42274 flow [2023-01-28 05:50:42,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 137.76470588235293) internal successors, (2342), 17 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:50:42,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:50:42,978 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:50:42,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 05:50:43,184 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,SelfDestructingSolverStorable27 [2023-01-28 05:50:43,184 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:50:43,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:50:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash 542179494, now seen corresponding path program 19 times [2023-01-28 05:50:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:50:43,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138208771] [2023-01-28 05:50:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:50:43,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:50:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:50:43,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:50:43,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:50:43,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138208771] [2023-01-28 05:50:43,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138208771] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:50:43,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458836147] [2023-01-28 05:50:43,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:50:43,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:50:43,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:50:43,324 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:50:43,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 05:50:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:50:43,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:50:43,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:50:43,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:50:43,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:50:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:50:43,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458836147] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:50:43,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:50:43,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-28 05:50:43,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151971989] [2023-01-28 05:50:43,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:50:43,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 05:50:43,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:50:43,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 05:50:43,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-01-28 05:50:43,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:50:43,762 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1706 transitions, 42274 flow. Second operand has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:50:43,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:50:43,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:50:43,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:50:46,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:50:52,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:50:55,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:51:06,545 INFO L130 PetriNetUnfolder]: 8868/18137 cut-off events. [2023-01-28 05:51:06,545 INFO L131 PetriNetUnfolder]: For 706214/706214 co-relation queries the response was YES. [2023-01-28 05:51:06,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190664 conditions, 18137 events. 8868/18137 cut-off events. For 706214/706214 co-relation queries the response was YES. Maximal size of possible extension queue 1178. Compared 174512 event pairs, 4167 based on Foata normal form. 36/18173 useless extension candidates. Maximal degree in co-relation 188507. Up to 16723 conditions per place. [2023-01-28 05:51:06,761 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1590 selfloop transitions, 365 changer transitions 2/1957 dead transitions. [2023-01-28 05:51:06,761 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 1957 transitions, 51498 flow [2023-01-28 05:51:06,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 05:51:06,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 05:51:06,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 5490 transitions. [2023-01-28 05:51:06,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39653304442036835 [2023-01-28 05:51:06,765 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 5490 transitions. [2023-01-28 05:51:06,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 5490 transitions. [2023-01-28 05:51:06,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:51:06,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 5490 transitions. [2023-01-28 05:51:06,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 140.76923076923077) internal successors, (5490), 39 states have internal predecessors, (5490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:51:06,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:51:06,775 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 355.0) internal successors, (14200), 40 states have internal predecessors, (14200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:51:06,775 INFO L175 Difference]: Start difference. First operand has 387 places, 1706 transitions, 42274 flow. Second operand 39 states and 5490 transitions. [2023-01-28 05:51:06,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 1957 transitions, 51498 flow [2023-01-28 05:51:12,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1957 transitions, 48950 flow, removed 523 selfloop flow, removed 28 redundant places. [2023-01-28 05:51:12,443 INFO L231 Difference]: Finished difference. Result has 422 places, 1836 transitions, 44223 flow [2023-01-28 05:51:12,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=39856, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=44223, PETRI_PLACES=422, PETRI_TRANSITIONS=1836} [2023-01-28 05:51:12,444 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 401 predicate places. [2023-01-28 05:51:12,444 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 1836 transitions, 44223 flow [2023-01-28 05:51:12,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:51:12,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:51:12,445 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:51:12,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 05:51:12,649 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,SelfDestructingSolverStorable28 [2023-01-28 05:51:12,650 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:51:12,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:51:12,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1024727917, now seen corresponding path program 20 times [2023-01-28 05:51:12,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:51:12,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729935668] [2023-01-28 05:51:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:51:12,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:51:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:51:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:51:12,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:51:12,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729935668] [2023-01-28 05:51:12,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729935668] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:51:12,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197732452] [2023-01-28 05:51:12,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:51:12,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:51:12,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:51:12,759 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:51:12,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 05:51:12,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:51:12,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:51:12,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:51:12,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:51:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:51:12,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:51:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:51:13,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197732452] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:51:13,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:51:13,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 05:51:13,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331798047] [2023-01-28 05:51:13,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:51:13,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:51:13,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:51:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:51:13,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-01-28 05:51:13,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:51:13,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 1836 transitions, 44223 flow. Second operand has 18 states, 18 states have (on average 137.77777777777777) internal successors, (2480), 18 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:51:13,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:51:13,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:51:13,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:51:23,142 WARN L222 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 49 DAG size of output: 45 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:51:43,942 WARN L222 SmtUtils]: Spent 18.39s on a formula simplification. DAG size of input: 48 DAG size of output: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:51:45,981 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (div |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296))) (let ((.cse2 (mod (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) 4294967296)) (.cse1 (* .cse3 4294967296))) (and (forall ((~n~0 Int)) (let ((.cse0 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse0 4294967296)) |c_thread2Thread1of1ForFork1_~i~1#1| 1) (+ .cse1 .cse0)) (<= (mod .cse0 4294967296) .cse2)))) (<= (div |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296) .cse3) (forall ((~n~0 Int)) (let ((.cse4 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse4 4294967296)) 4) .cse4) (<= (mod .cse4 4294967296) .cse2)))) (let ((.cse5 (* 3 c_~n~0))) (<= (+ (* (div .cse5 4294967296) 4294967296) |c_thread2Thread1of1ForFork1_~i~1#1| 1) (+ .cse1 .cse5))) (forall ((~n~0 Int)) (let ((.cse6 (* 3 ~n~0))) (or (<= (mod .cse6 4294967296) (mod (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|) 4294967296)) (<= (+ (* 4294967296 (div .cse6 4294967296)) 4) .cse6)))) (forall ((~n~0 Int)) (let ((.cse7 (* 3 ~n~0))) (or (<= (mod .cse7 4294967296) (mod (+ 3 |c_thread1Thread1of1ForFork0_~i~0#1|) 4294967296)) (<= (+ (* 4294967296 (div .cse7 4294967296)) 4) .cse7)))) (<= |c_thread2Thread1of1ForFork1_~i~1#1| |c_thread1Thread1of1ForFork0_~i~0#1|)))) is different from false [2023-01-28 05:51:48,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:51:50,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:51:52,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:51:54,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:51:56,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:51:58,585 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:52:00,702 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (mod (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) 4294967296)) (.cse1 (* (div |c_thread2Thread1of1ForFork1_~i~1#1| 4294967296) 4294967296))) (and (forall ((~n~0 Int)) (let ((.cse0 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse0 4294967296)) |c_thread2Thread1of1ForFork1_~i~1#1| 1) (+ .cse1 .cse0)) (<= (mod .cse0 4294967296) .cse2)))) (forall ((~n~0 Int)) (let ((.cse3 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse3 4294967296)) 4) .cse3) (<= (mod .cse3 4294967296) .cse2)))) (let ((.cse4 (* 3 c_~n~0))) (<= (+ (* (div .cse4 4294967296) 4294967296) |c_thread2Thread1of1ForFork1_~i~1#1| 1) (+ .cse1 .cse4))) (forall ((~n~0 Int)) (let ((.cse5 (* 3 ~n~0))) (or (<= (mod .cse5 4294967296) (mod (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|) 4294967296)) (<= (+ (* 4294967296 (div .cse5 4294967296)) 4) .cse5)))) (forall ((~n~0 Int)) (let ((.cse6 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse6 4294967296)) |c_thread2Thread1of1ForFork1_~i~1#1| 4) (+ (* 4294967296 (div (+ |c_thread2Thread1of1ForFork1_~i~1#1| 3) 4294967296)) .cse6)) (<= (mod .cse6 4294967296) .cse2)))) (forall ((~n~0 Int)) (let ((.cse7 (* 3 ~n~0))) (or (<= (+ (* 4294967296 (div .cse7 4294967296)) |c_thread2Thread1of1ForFork1_~i~1#1| 1) (+ .cse1 .cse7)) (<= (mod .cse7 4294967296) (mod |c_thread1Thread1of1ForFork0_~i~0#1| 4294967296))))))) is different from false [2023-01-28 05:52:06,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:52:10,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:52:12,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:52:14,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:52:33,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:52:36,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:52:50,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:53:06,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:53:16,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:53:19,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:53:29,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:53:45,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:53:48,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:53:50,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:53:52,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:54:01,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:54:08,008 INFO L130 PetriNetUnfolder]: 10082/20654 cut-off events. [2023-01-28 05:54:08,008 INFO L131 PetriNetUnfolder]: For 1044697/1044697 co-relation queries the response was YES. [2023-01-28 05:54:08,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230292 conditions, 20654 events. 10082/20654 cut-off events. For 1044697/1044697 co-relation queries the response was YES. Maximal size of possible extension queue 1382. Compared 204239 event pairs, 2924 based on Foata normal form. 144/20798 useless extension candidates. Maximal degree in co-relation 229705. Up to 9302 conditions per place. [2023-01-28 05:54:08,316 INFO L137 encePairwiseOnDemand]: 348/355 looper letters, 1292 selfloop transitions, 1245 changer transitions 11/2548 dead transitions. [2023-01-28 05:54:08,317 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 2548 transitions, 63908 flow [2023-01-28 05:54:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 05:54:08,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 05:54:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 5709 transitions. [2023-01-28 05:54:08,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40204225352112677 [2023-01-28 05:54:08,322 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 5709 transitions. [2023-01-28 05:54:08,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 5709 transitions. [2023-01-28 05:54:08,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:54:08,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 5709 transitions. [2023-01-28 05:54:08,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 142.725) internal successors, (5709), 40 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:54:08,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 355.0) internal successors, (14555), 41 states have internal predecessors, (14555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:54:08,334 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 355.0) internal successors, (14555), 41 states have internal predecessors, (14555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:54:08,334 INFO L175 Difference]: Start difference. First operand has 422 places, 1836 transitions, 44223 flow. Second operand 40 states and 5709 transitions. [2023-01-28 05:54:08,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 2548 transitions, 63908 flow [2023-01-28 05:54:16,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 2548 transitions, 62973 flow, removed 409 selfloop flow, removed 6 redundant places. [2023-01-28 05:54:16,950 INFO L231 Difference]: Finished difference. Result has 473 places, 2150 transitions, 55570 flow [2023-01-28 05:54:16,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=43210, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=961, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=55570, PETRI_PLACES=473, PETRI_TRANSITIONS=2150} [2023-01-28 05:54:16,951 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 452 predicate places. [2023-01-28 05:54:16,951 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 2150 transitions, 55570 flow [2023-01-28 05:54:16,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.77777777777777) internal successors, (2480), 18 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:54:16,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:54:16,951 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:54:16,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 05:54:17,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:54:17,157 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:54:17,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:54:17,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2023740468, now seen corresponding path program 21 times [2023-01-28 05:54:17,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:54:17,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850648814] [2023-01-28 05:54:17,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:54:17,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:54:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:54:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:54:17,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:54:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850648814] [2023-01-28 05:54:17,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850648814] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:54:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647364496] [2023-01-28 05:54:17,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:54:17,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:54:17,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:54:17,306 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:54:17,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 05:54:17,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 05:54:17,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:54:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:54:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:54:17,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:54:17,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:54:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:54:17,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647364496] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:54:17,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:54:17,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-01-28 05:54:17,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143164411] [2023-01-28 05:54:17,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:54:17,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 05:54:17,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:54:17,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 05:54:17,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2023-01-28 05:54:17,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:54:17,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 2150 transitions, 55570 flow. Second operand has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:54:17,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:54:17,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:54:17,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:54:25,422 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:54:31,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:54:34,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:54:44,596 INFO L130 PetriNetUnfolder]: 10361/21191 cut-off events. [2023-01-28 05:54:44,596 INFO L131 PetriNetUnfolder]: For 1477431/1477431 co-relation queries the response was YES. [2023-01-28 05:54:44,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269110 conditions, 21191 events. 10361/21191 cut-off events. For 1477431/1477431 co-relation queries the response was YES. Maximal size of possible extension queue 1420. Compared 210308 event pairs, 4577 based on Foata normal form. 40/21231 useless extension candidates. Maximal degree in co-relation 268330. Up to 19074 conditions per place. [2023-01-28 05:54:44,916 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1908 selfloop transitions, 467 changer transitions 3/2378 dead transitions. [2023-01-28 05:54:44,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 2378 transitions, 66130 flow [2023-01-28 05:54:44,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 05:54:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 05:54:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 4542 transitions. [2023-01-28 05:54:44,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998239436619718 [2023-01-28 05:54:44,919 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 4542 transitions. [2023-01-28 05:54:44,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 4542 transitions. [2023-01-28 05:54:44,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:54:44,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 4542 transitions. [2023-01-28 05:54:44,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 141.9375) internal successors, (4542), 32 states have internal predecessors, (4542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:54:44,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 355.0) internal successors, (11715), 33 states have internal predecessors, (11715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:54:44,930 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 355.0) internal successors, (11715), 33 states have internal predecessors, (11715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:54:44,930 INFO L175 Difference]: Start difference. First operand has 473 places, 2150 transitions, 55570 flow. Second operand 32 states and 4542 transitions. [2023-01-28 05:54:44,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 2378 transitions, 66130 flow [2023-01-28 05:54:56,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 2378 transitions, 64654 flow, removed 580 selfloop flow, removed 13 redundant places. [2023-01-28 05:54:56,428 INFO L231 Difference]: Finished difference. Result has 504 places, 2242 transitions, 58680 flow [2023-01-28 05:54:56,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=54043, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1731, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=58680, PETRI_PLACES=504, PETRI_TRANSITIONS=2242} [2023-01-28 05:54:56,430 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 483 predicate places. [2023-01-28 05:54:56,430 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 2242 transitions, 58680 flow [2023-01-28 05:54:56,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 137.68421052631578) internal successors, (2616), 19 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:54:56,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:54:56,430 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:54:56,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-28 05:54:56,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:54:56,636 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:54:56,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:54:56,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1894074439, now seen corresponding path program 22 times [2023-01-28 05:54:56,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:54:56,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075292142] [2023-01-28 05:54:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:54:56,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:54:56,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:54:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:54:56,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:54:56,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075292142] [2023-01-28 05:54:56,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075292142] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:54:56,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883781860] [2023-01-28 05:54:56,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:54:56,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:54:56,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:54:56,779 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:54:56,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 05:54:56,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:54:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:54:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:54:56,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:54:56,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:54:56,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:54:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:54:57,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883781860] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:54:57,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:54:57,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 05:54:57,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622914198] [2023-01-28 05:54:57,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:54:57,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:54:57,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:54:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:54:57,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-01-28 05:54:57,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:54:57,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 2242 transitions, 58680 flow. Second operand has 18 states, 18 states have (on average 137.88888888888889) internal successors, (2482), 18 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:54:57,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:54:57,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:54:57,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:55:05,232 WARN L222 SmtUtils]: Spent 6.20s on a formula simplification. DAG size of input: 42 DAG size of output: 25 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:55:07,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:55:34,412 INFO L130 PetriNetUnfolder]: 10845/22008 cut-off events. [2023-01-28 05:55:34,412 INFO L131 PetriNetUnfolder]: For 1851298/1851298 co-relation queries the response was YES. [2023-01-28 05:55:34,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 293632 conditions, 22008 events. 10845/22008 cut-off events. For 1851298/1851298 co-relation queries the response was YES. Maximal size of possible extension queue 1506. Compared 218094 event pairs, 3063 based on Foata normal form. 216/22224 useless extension candidates. Maximal degree in co-relation 292868. Up to 9109 conditions per place. [2023-01-28 05:55:34,765 INFO L137 encePairwiseOnDemand]: 350/355 looper letters, 1398 selfloop transitions, 1287 changer transitions 6/2691 dead transitions. [2023-01-28 05:55:34,765 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 2691 transitions, 74061 flow [2023-01-28 05:55:34,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 05:55:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 05:55:34,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4003 transitions. [2023-01-28 05:55:34,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027162977867203 [2023-01-28 05:55:34,768 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4003 transitions. [2023-01-28 05:55:34,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4003 transitions. [2023-01-28 05:55:34,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:55:34,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4003 transitions. [2023-01-28 05:55:34,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 142.96428571428572) internal successors, (4003), 28 states have internal predecessors, (4003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:55:34,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:55:34,775 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 355.0) internal successors, (10295), 29 states have internal predecessors, (10295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:55:34,775 INFO L175 Difference]: Start difference. First operand has 504 places, 2242 transitions, 58680 flow. Second operand 28 states and 4003 transitions. [2023-01-28 05:55:34,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 2691 transitions, 74061 flow [2023-01-28 05:55:46,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 2691 transitions, 72740 flow, removed 567 selfloop flow, removed 10 redundant places. [2023-01-28 05:55:46,849 INFO L231 Difference]: Finished difference. Result has 530 places, 2340 transitions, 64046 flow [2023-01-28 05:55:46,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=57102, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=980, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=64046, PETRI_PLACES=530, PETRI_TRANSITIONS=2340} [2023-01-28 05:55:46,851 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 509 predicate places. [2023-01-28 05:55:46,852 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 2340 transitions, 64046 flow [2023-01-28 05:55:46,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.88888888888889) internal successors, (2482), 18 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:55:46,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:55:46,852 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:55:46,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-01-28 05:55:47,057 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,SelfDestructingSolverStorable31 [2023-01-28 05:55:47,057 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:55:47,057 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:55:47,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1285537098, now seen corresponding path program 23 times [2023-01-28 05:55:47,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:55:47,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704364301] [2023-01-28 05:55:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:55:47,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:55:47,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:55:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:55:47,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:55:47,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704364301] [2023-01-28 05:55:47,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704364301] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:55:47,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224099653] [2023-01-28 05:55:47,195 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:55:47,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:55:47,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:55:47,196 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:55:47,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 05:55:47,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:55:47,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:55:47,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:55:47,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:55:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:55:47,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:55:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:55:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224099653] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:55:47,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:55:47,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 05:55:47,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56559359] [2023-01-28 05:55:47,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:55:47,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 05:55:47,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:55:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 05:55:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-01-28 05:55:47,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:55:47,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 2340 transitions, 64046 flow. Second operand has 18 states, 18 states have (on average 137.83333333333334) internal successors, (2481), 18 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:55:47,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:55:47,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:55:47,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:55:56,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:56:13,102 INFO L130 PetriNetUnfolder]: 10805/22192 cut-off events. [2023-01-28 05:56:13,102 INFO L131 PetriNetUnfolder]: For 1977835/1977835 co-relation queries the response was YES. [2023-01-28 05:56:13,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304860 conditions, 22192 events. 10805/22192 cut-off events. For 1977835/1977835 co-relation queries the response was YES. Maximal size of possible extension queue 1544. Compared 225070 event pairs, 2028 based on Foata normal form. 76/22268 useless extension candidates. Maximal degree in co-relation 304074. Up to 10733 conditions per place. [2023-01-28 05:56:13,439 INFO L137 encePairwiseOnDemand]: 349/355 looper letters, 1849 selfloop transitions, 857 changer transitions 16/2722 dead transitions. [2023-01-28 05:56:13,439 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 2722 transitions, 80507 flow [2023-01-28 05:56:13,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-01-28 05:56:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-01-28 05:56:13,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 6039 transitions. [2023-01-28 05:56:13,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39561087454962335 [2023-01-28 05:56:13,443 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 6039 transitions. [2023-01-28 05:56:13,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 6039 transitions. [2023-01-28 05:56:13,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:56:13,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 6039 transitions. [2023-01-28 05:56:13,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 140.4418604651163) internal successors, (6039), 43 states have internal predecessors, (6039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:56:13,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 355.0) internal successors, (15620), 44 states have internal predecessors, (15620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:56:13,453 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 355.0) internal successors, (15620), 44 states have internal predecessors, (15620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:56:13,453 INFO L175 Difference]: Start difference. First operand has 530 places, 2340 transitions, 64046 flow. Second operand 43 states and 6039 transitions. [2023-01-28 05:56:13,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 2722 transitions, 80507 flow [2023-01-28 05:56:27,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2722 transitions, 78854 flow, removed 509 selfloop flow, removed 15 redundant places. [2023-01-28 05:56:27,962 INFO L231 Difference]: Finished difference. Result has 561 places, 2349 transitions, 64550 flow [2023-01-28 05:56:27,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=355, PETRI_DIFFERENCE_MINUEND_FLOW=61806, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=826, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=64550, PETRI_PLACES=561, PETRI_TRANSITIONS=2349} [2023-01-28 05:56:27,964 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 540 predicate places. [2023-01-28 05:56:27,964 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 2349 transitions, 64550 flow [2023-01-28 05:56:27,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 137.83333333333334) internal successors, (2481), 18 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:56:27,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:56:27,964 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:56:27,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-01-28 05:56:28,169 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,SelfDestructingSolverStorable32 [2023-01-28 05:56:28,169 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:56:28,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:56:28,170 INFO L85 PathProgramCache]: Analyzing trace with hash 535537283, now seen corresponding path program 24 times [2023-01-28 05:56:28,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:56:28,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600614936] [2023-01-28 05:56:28,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:56:28,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:56:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:56:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:56:28,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:56:28,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600614936] [2023-01-28 05:56:28,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600614936] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:56:28,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232864463] [2023-01-28 05:56:28,317 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:56:28,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:56:28,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:56:28,318 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:56:28,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 05:56:28,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:56:28,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:56:28,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 05:56:28,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:56:28,680 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:56:28,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:56:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:56:28,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232864463] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:56:28,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:56:28,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-01-28 05:56:29,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109867542] [2023-01-28 05:56:29,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:56:29,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 05:56:29,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:56:29,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 05:56:29,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-01-28 05:56:29,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 355 [2023-01-28 05:56:29,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 2349 transitions, 64550 flow. Second operand has 17 states, 17 states have (on average 138.0) internal successors, (2346), 17 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:56:29,003 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:56:29,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 355 [2023-01-28 05:56:29,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:56:38,437 WARN L222 SmtUtils]: Spent 6.38s on a formula simplification. DAG size of input: 47 DAG size of output: 39 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:56:45,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:56:47,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2023-01-28 05:57:00,294 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:57:00,318 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:57:01,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 05:57:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 05:57:01,396 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 05:57:01,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-01-28 05:57:01,396 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-01-28 05:57:01,400 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 05:57:01,400 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 05:57:01,400 INFO L445 BasicCegarLoop]: Path program histogram: [24, 5, 3, 1, 1] [2023-01-28 05:57:01,406 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 05:57:01,406 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 05:57:01,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 05:57:01 BasicIcfg [2023-01-28 05:57:01,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 05:57:01,408 INFO L158 Benchmark]: Toolchain (without parser) took 849257.29ms. Allocated memory was 354.4MB in the beginning and 4.9GB in the end (delta: 4.5GB). Free memory was 294.0MB in the beginning and 3.0GB in the end (delta: -2.7GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2023-01-28 05:57:01,408 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 354.4MB. Free memory is still 303.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 05:57:01,408 INFO L158 Benchmark]: CACSL2BoogieTranslator took 173.61ms. Allocated memory is still 354.4MB. Free memory was 293.8MB in the beginning and 282.5MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 05:57:01,408 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.25ms. Allocated memory is still 354.4MB. Free memory was 282.5MB in the beginning and 280.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 05:57:01,409 INFO L158 Benchmark]: Boogie Preprocessor took 18.07ms. Allocated memory is still 354.4MB. Free memory was 280.4MB in the beginning and 278.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 05:57:01,409 INFO L158 Benchmark]: RCFGBuilder took 450.06ms. Allocated memory was 354.4MB in the beginning and 708.8MB in the end (delta: 354.4MB). Free memory was 278.8MB in the beginning and 669.3MB in the end (delta: -390.4MB). Peak memory consumption was 15.5MB. Max. memory is 16.0GB. [2023-01-28 05:57:01,409 INFO L158 Benchmark]: TraceAbstraction took 848586.51ms. Allocated memory was 708.8MB in the beginning and 4.9GB in the end (delta: 4.2GB). Free memory was 668.2MB in the beginning and 3.0GB in the end (delta: -2.3GB). Peak memory consumption was 1.9GB. Max. memory is 16.0GB. [2023-01-28 05:57:01,409 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 354.4MB. Free memory is still 303.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 173.61ms. Allocated memory is still 354.4MB. Free memory was 293.8MB in the beginning and 282.5MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.25ms. Allocated memory is still 354.4MB. Free memory was 282.5MB in the beginning and 280.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.07ms. Allocated memory is still 354.4MB. Free memory was 280.4MB in the beginning and 278.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 450.06ms. Allocated memory was 354.4MB in the beginning and 708.8MB in the end (delta: 354.4MB). Free memory was 278.8MB in the beginning and 669.3MB in the end (delta: -390.4MB). Peak memory consumption was 15.5MB. Max. memory is 16.0GB. * TraceAbstraction took 848586.51ms. Allocated memory was 708.8MB in the beginning and 4.9GB in the end (delta: 4.2GB). Free memory was 668.2MB in the beginning and 3.0GB in the end (delta: -2.3GB). Peak memory consumption was 1.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 152 PlacesBefore, 21 PlacesAfterwards, 160 TransitionsBefore, 17 TransitionsAfterwards, 2592 CoEnabledTransitionPairs, 7 FixpointIterations, 72 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 19 TrivialYvCompositions, 24 ConcurrentYvCompositions, 12 ChoiceCompositions, 185 TotalNumberOfCompositions, 2630 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2598, independent: 2589, independent conditional: 0, independent unconditional: 2589, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1564, independent: 1559, independent conditional: 0, independent unconditional: 1559, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2598, independent: 1030, independent conditional: 0, independent unconditional: 1030, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 1564, unknown conditional: 0, unknown unconditional: 1564] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 91]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 216 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: 848.5s, OverallIterations: 34, TraceHistogramMax: 4, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.0s, AutomataDifference: 638.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 239 mSolverCounterUnknown, 3808 SdHoareTripleChecker+Valid, 142.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3808 mSDsluCounter, 447 SdHoareTripleChecker+Invalid, 139.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 559 IncrementalHoareTripleChecker+Unchecked, 344 mSDsCounter, 456 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17336 IncrementalHoareTripleChecker+Invalid, 18590 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 456 mSolverCounterUnsat, 103 mSDtfsCounter, 17336 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1829 GetRequests, 959 SyntacticMatches, 37 SemanticMatches, 832 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 5812 ImplicationChecksByTransitivity, 326.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64550occurred in iteration=33, InterpolantAutomatonStates: 637, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.5s SatisfiabilityAnalysisTime, 196.6s InterpolantComputationTime, 1177 NumberOfCodeBlocks, 1176 NumberOfCodeBlocksAsserted, 95 NumberOfCheckSat, 1623 ConstructedInterpolants, 104 QuantifiedInterpolants, 21957 SizeOfPredicates, 187 NumberOfNonLiveVariables, 5641 ConjunctsInSsa, 583 ConjunctsInUnsatCore, 88 InterpolantComputations, 8 PerfectInterpolantSequences, 244/815 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