/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/popl20-more-queue-add-2-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 04:53:30,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 04:53:30,835 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 04:53:30,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 04:53:30,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 04:53:30,879 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 04:53:30,881 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 04:53:30,883 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 04:53:30,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 04:53:30,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 04:53:30,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 04:53:30,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 04:53:30,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 04:53:30,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 04:53:30,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 04:53:30,892 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 04:53:30,893 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 04:53:30,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 04:53:30,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 04:53:30,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 04:53:30,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 04:53:30,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 04:53:30,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 04:53:30,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 04:53:30,912 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 04:53:30,913 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 04:53:30,913 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 04:53:30,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 04:53:30,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 04:53:30,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 04:53:30,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 04:53:30,915 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 04:53:30,915 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 04:53:30,916 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 04:53:30,917 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 04:53:30,917 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 04:53:30,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 04:53:30,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 04:53:30,918 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 04:53:30,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 04:53:30,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 04:53:30,922 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 04:53:30,953 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 04:53:30,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 04:53:30,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 04:53:30,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 04:53:30,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 04:53:30,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 04:53:30,955 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 04:53:30,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 04:53:30,955 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 04:53:30,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 04:53:30,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 04:53:30,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 04:53:30,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 04:53:30,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 04:53:30,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 04:53:30,957 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 04:53:30,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 04:53:30,957 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 04:53:30,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 04:53:30,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 04:53:30,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 04:53:30,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 04:53:30,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 04:53:30,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:53:30,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 04:53:30,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 04:53:30,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 04:53:30,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 04:53:30,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 04:53:30,959 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 04:53:30,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 04:53:30,959 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 04:53:31,153 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 04:53:31,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 04:53:31,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 04:53:31,179 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 04:53:31,179 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 04:53:31,180 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-01-28 04:53:32,261 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 04:53:32,442 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 04:53:32,442 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-01-28 04:53:32,449 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a820777f4/2fd587d8a1da4af7984cf15d7861120c/FLAGd977d118a [2023-01-28 04:53:32,467 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a820777f4/2fd587d8a1da4af7984cf15d7861120c [2023-01-28 04:53:32,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 04:53:32,471 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 04:53:32,473 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 04:53:32,473 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 04:53:32,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 04:53:32,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6614ae25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32, skipping insertion in model container [2023-01-28 04:53:32,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 04:53:32,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 04:53:32,683 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/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-01-28 04:53:32,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:53:32,704 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 04:53:32,739 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/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-01-28 04:53:32,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:53:32,747 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:53:32,748 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:53:32,754 INFO L208 MainTranslator]: Completed translation [2023-01-28 04:53:32,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32 WrapperNode [2023-01-28 04:53:32,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 04:53:32,757 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 04:53:32,757 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 04:53:32,757 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 04:53:32,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,780 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,824 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 168 [2023-01-28 04:53:32,824 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 04:53:32,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 04:53:32,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 04:53:32,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 04:53:32,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,847 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,859 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 04:53:32,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 04:53:32,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 04:53:32,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 04:53:32,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (1/1) ... [2023-01-28 04:53:32,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:53:32,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:53:32,902 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 04:53:32,921 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 04:53:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 04:53:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 04:53:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 04:53:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 04:53:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 04:53:32,937 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 04:53:32,937 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 04:53:32,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 04:53:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 04:53:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 04:53:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 04:53:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 04:53:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 04:53:32,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 04:53:32,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 04:53:32,939 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 04:53:33,019 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 04:53:33,021 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 04:53:33,341 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 04:53:33,408 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 04:53:33,408 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 04:53:33,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:53:33 BoogieIcfgContainer [2023-01-28 04:53:33,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 04:53:33,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 04:53:33,412 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 04:53:33,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 04:53:33,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 04:53:32" (1/3) ... [2023-01-28 04:53:33,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a61687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:53:33, skipping insertion in model container [2023-01-28 04:53:33,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:53:32" (2/3) ... [2023-01-28 04:53:33,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a61687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:53:33, skipping insertion in model container [2023-01-28 04:53:33,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:53:33" (3/3) ... [2023-01-28 04:53:33,416 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-01-28 04:53:33,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 04:53:33,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 04:53:33,430 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 04:53:33,472 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 04:53:33,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 292 flow [2023-01-28 04:53:33,548 INFO L130 PetriNetUnfolder]: 11/136 cut-off events. [2023-01-28 04:53:33,549 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:53:33,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 136 events. 11/136 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-01-28 04:53:33,553 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 138 transitions, 292 flow [2023-01-28 04:53:33,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 128 transitions, 268 flow [2023-01-28 04:53:33,559 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 04:53:33,565 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 128 transitions, 268 flow [2023-01-28 04:53:33,567 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 128 transitions, 268 flow [2023-01-28 04:53:33,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 268 flow [2023-01-28 04:53:33,619 INFO L130 PetriNetUnfolder]: 11/128 cut-off events. [2023-01-28 04:53:33,619 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:53:33,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 11/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 77 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-01-28 04:53:33,623 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-01-28 04:53:37,808 INFO L134 LiptonReduction]: Checked pairs total: 839 [2023-01-28 04:53:37,808 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-01-28 04:53:37,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 04:53:37,825 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;@60e887d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 04:53:37,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 04:53:37,829 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 04:53:37,830 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 04:53:37,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:37,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:37,830 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 04:53:37,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:37,834 INFO L85 PathProgramCache]: Analyzing trace with hash -272600085, now seen corresponding path program 1 times [2023-01-28 04:53:37,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:37,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098734256] [2023-01-28 04:53:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:37,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:37,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:38,218 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 04:53:38,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:38,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098734256] [2023-01-28 04:53:38,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098734256] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:53:38,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:53:38,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 04:53:38,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856445521] [2023-01-28 04:53:38,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:53:38,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 04:53:38,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:38,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 04:53:38,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 04:53:38,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 271 [2023-01-28 04:53:38,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:38,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:38,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 271 [2023-01-28 04:53:38,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:38,338 INFO L130 PetriNetUnfolder]: 48/91 cut-off events. [2023-01-28 04:53:38,338 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-01-28 04:53:38,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 91 events. 48/91 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 205 event pairs, 24 based on Foata normal form. 8/74 useless extension candidates. Maximal degree in co-relation 131. Up to 81 conditions per place. [2023-01-28 04:53:38,341 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 15 selfloop transitions, 2 changer transitions 6/24 dead transitions. [2023-01-28 04:53:38,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 112 flow [2023-01-28 04:53:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 04:53:38,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 04:53:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 459 transitions. [2023-01-28 04:53:38,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42343173431734316 [2023-01-28 04:53:38,361 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 459 transitions. [2023-01-28 04:53:38,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 459 transitions. [2023-01-28 04:53:38,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:38,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 459 transitions. [2023-01-28 04:53:38,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:38,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:38,375 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:38,393 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 459 transitions. [2023-01-28 04:53:38,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 112 flow [2023-01-28 04:53:38,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 04:53:38,397 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2023-01-28 04:53:38,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, 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=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-01-28 04:53:38,401 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-01-28 04:53:38,401 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2023-01-28 04:53:38,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:38,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:38,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:38,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 04:53:38,402 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 04:53:38,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:38,403 INFO L85 PathProgramCache]: Analyzing trace with hash -799736851, now seen corresponding path program 1 times [2023-01-28 04:53:38,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:38,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429190928] [2023-01-28 04:53:38,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:38,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:39,045 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 04:53:39,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:39,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429190928] [2023-01-28 04:53:39,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429190928] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:53:39,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:53:39,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 04:53:39,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194090221] [2023-01-28 04:53:39,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:53:39,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 04:53:39,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:39,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 04:53:39,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-01-28 04:53:39,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 271 [2023-01-28 04:53:39,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:39,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 271 [2023-01-28 04:53:39,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:39,202 INFO L130 PetriNetUnfolder]: 78/140 cut-off events. [2023-01-28 04:53:39,202 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-01-28 04:53:39,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 140 events. 78/140 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 378 event pairs, 1 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 352. Up to 89 conditions per place. [2023-01-28 04:53:39,204 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 32 selfloop transitions, 13 changer transitions 5/50 dead transitions. [2023-01-28 04:53:39,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 50 transitions, 249 flow [2023-01-28 04:53:39,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:53:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:53:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 874 transitions. [2023-01-28 04:53:39,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40313653136531363 [2023-01-28 04:53:39,207 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 874 transitions. [2023-01-28 04:53:39,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 874 transitions. [2023-01-28 04:53:39,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:39,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 874 transitions. [2023-01-28 04:53:39,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 109.25) internal successors, (874), 8 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,214 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,214 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 8 states and 874 transitions. [2023-01-28 04:53:39,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 50 transitions, 249 flow [2023-01-28 04:53:39,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 50 transitions, 245 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 04:53:39,216 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 147 flow [2023-01-28 04:53:39,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=147, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-01-28 04:53:39,217 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-01-28 04:53:39,217 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 147 flow [2023-01-28 04:53:39,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:39,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:39,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 04:53:39,218 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 04:53:39,219 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:39,219 INFO L85 PathProgramCache]: Analyzing trace with hash 143763307, now seen corresponding path program 2 times [2023-01-28 04:53:39,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:39,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717834571] [2023-01-28 04:53:39,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:39,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:39,638 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 04:53:39,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:39,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717834571] [2023-01-28 04:53:39,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717834571] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:53:39,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:53:39,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 04:53:39,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87359194] [2023-01-28 04:53:39,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:53:39,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 04:53:39,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:39,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 04:53:39,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 04:53:39,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 271 [2023-01-28 04:53:39,644 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 147 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,644 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:39,644 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 271 [2023-01-28 04:53:39,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:39,775 INFO L130 PetriNetUnfolder]: 88/156 cut-off events. [2023-01-28 04:53:39,777 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-01-28 04:53:39,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 156 events. 88/156 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 408 event pairs, 9 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 559. Up to 120 conditions per place. [2023-01-28 04:53:39,780 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 17 changer transitions 5/51 dead transitions. [2023-01-28 04:53:39,781 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 345 flow [2023-01-28 04:53:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:53:39,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:53:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 869 transitions. [2023-01-28 04:53:39,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.400830258302583 [2023-01-28 04:53:39,783 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 869 transitions. [2023-01-28 04:53:39,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 869 transitions. [2023-01-28 04:53:39,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:39,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 869 transitions. [2023-01-28 04:53:39,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 108.625) internal successors, (869), 8 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,790 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,790 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 147 flow. Second operand 8 states and 869 transitions. [2023-01-28 04:53:39,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 345 flow [2023-01-28 04:53:39,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-01-28 04:53:39,795 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 222 flow [2023-01-28 04:53:39,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-01-28 04:53:39,796 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-01-28 04:53:39,799 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 222 flow [2023-01-28 04:53:39,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:39,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:39,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 04:53:39,801 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 04:53:39,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:39,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1615625679, now seen corresponding path program 3 times [2023-01-28 04:53:39,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:39,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560690988] [2023-01-28 04:53:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:39,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:39,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:39,905 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 04:53:39,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:39,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560690988] [2023-01-28 04:53:39,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560690988] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:53:39,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:53:39,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 04:53:39,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272270880] [2023-01-28 04:53:39,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:53:39,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 04:53:39,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:39,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 04:53:39,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 04:53:39,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-01-28 04:53:39,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:39,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-01-28 04:53:39,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:39,947 INFO L130 PetriNetUnfolder]: 63/119 cut-off events. [2023-01-28 04:53:39,948 INFO L131 PetriNetUnfolder]: For 122/125 co-relation queries the response was YES. [2023-01-28 04:53:39,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 119 events. 63/119 cut-off events. For 122/125 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 297 event pairs, 10 based on Foata normal form. 9/108 useless extension candidates. Maximal degree in co-relation 435. Up to 103 conditions per place. [2023-01-28 04:53:39,949 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 25 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-01-28 04:53:39,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 243 flow [2023-01-28 04:53:39,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 04:53:39,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 04:53:39,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-01-28 04:53:39,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46494464944649444 [2023-01-28 04:53:39,951 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-01-28 04:53:39,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-01-28 04:53:39,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:39,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-01-28 04:53:39,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,954 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 222 flow. Second operand 3 states and 378 transitions. [2023-01-28 04:53:39,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 243 flow [2023-01-28 04:53:39,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 222 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-01-28 04:53:39,956 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 165 flow [2023-01-28 04:53:39,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-01-28 04:53:39,957 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-01-28 04:53:39,957 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 165 flow [2023-01-28 04:53:39,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:39,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:39,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:39,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 04:53:39,957 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 04:53:39,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:39,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2042112127, now seen corresponding path program 4 times [2023-01-28 04:53:39,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:39,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561569383] [2023-01-28 04:53:39,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:39,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:40,308 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 04:53:40,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:40,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561569383] [2023-01-28 04:53:40,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561569383] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:53:40,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:53:40,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 04:53:40,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851339109] [2023-01-28 04:53:40,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:53:40,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 04:53:40,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:40,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 04:53:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 04:53:40,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 271 [2023-01-28 04:53:40,312 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:40,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:40,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 271 [2023-01-28 04:53:40,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:40,410 INFO L130 PetriNetUnfolder]: 66/130 cut-off events. [2023-01-28 04:53:40,410 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-01-28 04:53:40,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 130 events. 66/130 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 11 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 442. Up to 94 conditions per place. [2023-01-28 04:53:40,411 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 12 changer transitions 5/46 dead transitions. [2023-01-28 04:53:40,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 296 flow [2023-01-28 04:53:40,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:53:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:53:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 864 transitions. [2023-01-28 04:53:40,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985239852398524 [2023-01-28 04:53:40,414 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 864 transitions. [2023-01-28 04:53:40,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 864 transitions. [2023-01-28 04:53:40,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:40,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 864 transitions. [2023-01-28 04:53:40,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 108.0) internal successors, (864), 8 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:40,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:40,420 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:40,420 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 165 flow. Second operand 8 states and 864 transitions. [2023-01-28 04:53:40,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 296 flow [2023-01-28 04:53:40,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 04:53:40,425 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 185 flow [2023-01-28 04:53:40,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-01-28 04:53:40,427 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-01-28 04:53:40,427 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 185 flow [2023-01-28 04:53:40,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:40,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:40,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:40,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 04:53:40,428 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 04:53:40,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:40,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1023024236, now seen corresponding path program 1 times [2023-01-28 04:53:40,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:40,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113603130] [2023-01-28 04:53:40,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:40,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:40,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:40,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113603130] [2023-01-28 04:53:40,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113603130] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:53:40,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052306054] [2023-01-28 04:53:40,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:40,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:40,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:53:40,561 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 04:53:40,614 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 04:53:40,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:40,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:53:40,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:53:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:40,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:53:40,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:40,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052306054] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:53:40,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:53:40,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 04:53:40,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848109949] [2023-01-28 04:53:40,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:53:40,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 04:53:40,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:40,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 04:53:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 04:53:40,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 271 [2023-01-28 04:53:40,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 185 flow. Second operand has 12 states, 12 states have (on average 108.08333333333333) internal successors, (1297), 12 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:40,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:40,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 271 [2023-01-28 04:53:40,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:41,012 INFO L130 PetriNetUnfolder]: 98/203 cut-off events. [2023-01-28 04:53:41,012 INFO L131 PetriNetUnfolder]: For 311/325 co-relation queries the response was YES. [2023-01-28 04:53:41,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 203 events. 98/203 cut-off events. For 311/325 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 697 event pairs, 36 based on Foata normal form. 14/197 useless extension candidates. Maximal degree in co-relation 757. Up to 112 conditions per place. [2023-01-28 04:53:41,013 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 46 selfloop transitions, 7 changer transitions 4/59 dead transitions. [2023-01-28 04:53:41,014 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 451 flow [2023-01-28 04:53:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 04:53:41,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 04:53:41,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 674 transitions. [2023-01-28 04:53:41,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4145141451414514 [2023-01-28 04:53:41,016 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 674 transitions. [2023-01-28 04:53:41,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 674 transitions. [2023-01-28 04:53:41,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:41,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 674 transitions. [2023-01-28 04:53:41,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.33333333333333) internal successors, (674), 6 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:41,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:41,022 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:41,022 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 185 flow. Second operand 6 states and 674 transitions. [2023-01-28 04:53:41,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 451 flow [2023-01-28 04:53:41,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 401 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-01-28 04:53:41,026 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 238 flow [2023-01-28 04:53:41,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-01-28 04:53:41,029 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-01-28 04:53:41,029 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 238 flow [2023-01-28 04:53:41,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 108.08333333333333) internal successors, (1297), 12 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:41,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:41,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:41,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 04:53:41,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-28 04:53:41,235 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 04:53:41,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:41,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1249123538, now seen corresponding path program 1 times [2023-01-28 04:53:41,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:41,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512794700] [2023-01-28 04:53:41,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:41,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:41,346 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 04:53:41,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:41,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512794700] [2023-01-28 04:53:41,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512794700] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:53:41,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:53:41,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 04:53:41,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737330290] [2023-01-28 04:53:41,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:53:41,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:53:41,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:41,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:53:41,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:53:41,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-01-28 04:53:41,349 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:41,349 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:41,349 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-01-28 04:53:41,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:41,441 INFO L130 PetriNetUnfolder]: 109/232 cut-off events. [2023-01-28 04:53:41,441 INFO L131 PetriNetUnfolder]: For 320/334 co-relation queries the response was YES. [2023-01-28 04:53:41,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 232 events. 109/232 cut-off events. For 320/334 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 828 event pairs, 15 based on Foata normal form. 16/216 useless extension candidates. Maximal degree in co-relation 646. Up to 83 conditions per place. [2023-01-28 04:53:41,443 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 34 selfloop transitions, 10 changer transitions 11/57 dead transitions. [2023-01-28 04:53:41,443 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 432 flow [2023-01-28 04:53:41,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 04:53:41,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 04:53:41,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 512 transitions. [2023-01-28 04:53:41,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47232472324723246 [2023-01-28 04:53:41,445 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 512 transitions. [2023-01-28 04:53:41,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 512 transitions. [2023-01-28 04:53:41,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:41,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 512 transitions. [2023-01-28 04:53:41,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:41,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:41,448 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:41,448 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 238 flow. Second operand 4 states and 512 transitions. [2023-01-28 04:53:41,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 432 flow [2023-01-28 04:53:41,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 407 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-01-28 04:53:41,451 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 214 flow [2023-01-28 04:53:41,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-01-28 04:53:41,452 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-01-28 04:53:41,452 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 214 flow [2023-01-28 04:53:41,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:41,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:41,453 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:41,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 04:53:41,453 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 04:53:41,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:41,453 INFO L85 PathProgramCache]: Analyzing trace with hash 935567924, now seen corresponding path program 2 times [2023-01-28 04:53:41,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:41,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204529640] [2023-01-28 04:53:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:41,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:41,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:41,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:41,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204529640] [2023-01-28 04:53:41,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204529640] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:53:41,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851609297] [2023-01-28 04:53:41,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:53:41,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:41,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:53:41,884 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 04:53:41,886 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 04:53:42,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:53:42,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:53:42,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 04:53:42,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:53:42,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:42,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:53:42,349 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 04:53:42,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-01-28 04:53:42,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:42,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851609297] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:53:42,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:53:42,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2023-01-28 04:53:42,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80306794] [2023-01-28 04:53:42,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:53:42,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:53:42,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:42,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:53:42,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-01-28 04:53:42,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2023-01-28 04:53:42,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 214 flow. Second operand has 20 states, 20 states have (on average 95.95) internal successors, (1919), 20 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:42,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:42,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2023-01-28 04:53:42,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:43,061 INFO L130 PetriNetUnfolder]: 261/504 cut-off events. [2023-01-28 04:53:43,061 INFO L131 PetriNetUnfolder]: For 771/785 co-relation queries the response was YES. [2023-01-28 04:53:43,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 504 events. 261/504 cut-off events. For 771/785 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2184 event pairs, 30 based on Foata normal form. 6/389 useless extension candidates. Maximal degree in co-relation 1540. Up to 263 conditions per place. [2023-01-28 04:53:43,066 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 92 selfloop transitions, 49 changer transitions 0/143 dead transitions. [2023-01-28 04:53:43,066 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 143 transitions, 1152 flow [2023-01-28 04:53:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 04:53:43,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 04:53:43,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1903 transitions. [2023-01-28 04:53:43,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695863274422218 [2023-01-28 04:53:43,071 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1903 transitions. [2023-01-28 04:53:43,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1903 transitions. [2023-01-28 04:53:43,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:43,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1903 transitions. [2023-01-28 04:53:43,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 100.15789473684211) internal successors, (1903), 19 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:43,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:43,083 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:43,083 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 214 flow. Second operand 19 states and 1903 transitions. [2023-01-28 04:53:43,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 143 transitions, 1152 flow [2023-01-28 04:53:43,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 143 transitions, 959 flow, removed 93 selfloop flow, removed 3 redundant places. [2023-01-28 04:53:43,088 INFO L231 Difference]: Finished difference. Result has 63 places, 83 transitions, 708 flow [2023-01-28 04:53:43,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=708, PETRI_PLACES=63, PETRI_TRANSITIONS=83} [2023-01-28 04:53:43,089 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 42 predicate places. [2023-01-28 04:53:43,089 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 83 transitions, 708 flow [2023-01-28 04:53:43,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.95) internal successors, (1919), 20 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:43,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:43,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:43,098 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 04:53:43,296 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,SelfDestructingSolverStorable7 [2023-01-28 04:53:43,296 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 04:53:43,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:43,297 INFO L85 PathProgramCache]: Analyzing trace with hash -912937574, now seen corresponding path program 3 times [2023-01-28 04:53:43,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:43,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443952804] [2023-01-28 04:53:43,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:43,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:43,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:43,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443952804] [2023-01-28 04:53:43,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443952804] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:53:43,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705226499] [2023-01-28 04:53:43,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:53:43,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:43,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:53:43,813 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 04:53:43,836 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 04:53:43,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:53:43,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:53:43,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 04:53:43,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:53:44,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:53:44,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 04:53:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:44,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:53:44,232 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_187 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_187) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-01-28 04:53:44,286 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:53:44,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-01-28 04:53:44,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-28 04:53:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:44,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705226499] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:53:44,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:53:44,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-01-28 04:53:44,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642364107] [2023-01-28 04:53:44,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:53:44,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 04:53:44,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:44,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 04:53:44,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=464, Unknown=1, NotChecked=44, Total=600 [2023-01-28 04:53:44,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-01-28 04:53:44,518 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 83 transitions, 708 flow. Second operand has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:44,518 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:44,518 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-01-28 04:53:44,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:46,630 INFO L130 PetriNetUnfolder]: 498/965 cut-off events. [2023-01-28 04:53:46,630 INFO L131 PetriNetUnfolder]: For 2937/2937 co-relation queries the response was YES. [2023-01-28 04:53:46,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4460 conditions, 965 events. 498/965 cut-off events. For 2937/2937 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4896 event pairs, 45 based on Foata normal form. 32/934 useless extension candidates. Maximal degree in co-relation 3642. Up to 347 conditions per place. [2023-01-28 04:53:46,638 INFO L137 encePairwiseOnDemand]: 257/271 looper letters, 146 selfloop transitions, 112 changer transitions 2/260 dead transitions. [2023-01-28 04:53:46,638 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 260 transitions, 2437 flow [2023-01-28 04:53:46,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 04:53:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 04:53:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2592 transitions. [2023-01-28 04:53:46,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31881918819188193 [2023-01-28 04:53:46,646 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2592 transitions. [2023-01-28 04:53:46,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2592 transitions. [2023-01-28 04:53:46,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:46,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2592 transitions. [2023-01-28 04:53:46,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 86.4) internal successors, (2592), 30 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 04:53:46,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:46,664 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:46,664 INFO L175 Difference]: Start difference. First operand has 63 places, 83 transitions, 708 flow. Second operand 30 states and 2592 transitions. [2023-01-28 04:53:46,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 260 transitions, 2437 flow [2023-01-28 04:53:46,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 260 transitions, 2254 flow, removed 82 selfloop flow, removed 3 redundant places. [2023-01-28 04:53:46,684 INFO L231 Difference]: Finished difference. Result has 105 places, 172 transitions, 1847 flow [2023-01-28 04:53:46,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1847, PETRI_PLACES=105, PETRI_TRANSITIONS=172} [2023-01-28 04:53:46,685 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 84 predicate places. [2023-01-28 04:53:46,685 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 172 transitions, 1847 flow [2023-01-28 04:53:46,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:46,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:46,686 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:46,695 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 04:53:46,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:46,896 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 04:53:46,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:46,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1416627676, now seen corresponding path program 4 times [2023-01-28 04:53:46,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:46,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15645148] [2023-01-28 04:53:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:46,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:47,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:47,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15645148] [2023-01-28 04:53:47,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15645148] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:53:47,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998407030] [2023-01-28 04:53:47,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:53:47,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:47,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:53:47,541 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 04:53:47,564 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 04:53:47,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:53:47,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:53:47,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 04:53:47,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:53:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:53:47,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:53:47,767 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 04:53:47,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-01-28 04:53:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:53:47,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998407030] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:53:47,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:53:47,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7] total 19 [2023-01-28 04:53:47,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831012986] [2023-01-28 04:53:47,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:53:47,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 04:53:47,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:47,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 04:53:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-01-28 04:53:47,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 271 [2023-01-28 04:53:47,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 172 transitions, 1847 flow. Second operand has 6 states, 6 states have (on average 102.66666666666667) internal successors, (616), 6 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:47,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:47,820 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 271 [2023-01-28 04:53:47,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:48,018 INFO L130 PetriNetUnfolder]: 495/934 cut-off events. [2023-01-28 04:53:48,018 INFO L131 PetriNetUnfolder]: For 6085/6085 co-relation queries the response was YES. [2023-01-28 04:53:48,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5535 conditions, 934 events. 495/934 cut-off events. For 6085/6085 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4588 event pairs, 81 based on Foata normal form. 2/936 useless extension candidates. Maximal degree in co-relation 5497. Up to 400 conditions per place. [2023-01-28 04:53:48,027 INFO L137 encePairwiseOnDemand]: 265/271 looper letters, 122 selfloop transitions, 66 changer transitions 1/189 dead transitions. [2023-01-28 04:53:48,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 189 transitions, 2376 flow [2023-01-28 04:53:48,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 04:53:48,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 04:53:48,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 641 transitions. [2023-01-28 04:53:48,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942189421894219 [2023-01-28 04:53:48,030 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 641 transitions. [2023-01-28 04:53:48,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 641 transitions. [2023-01-28 04:53:48,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:48,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 641 transitions. [2023-01-28 04:53:48,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.83333333333333) internal successors, (641), 6 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:48,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:48,034 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:48,034 INFO L175 Difference]: Start difference. First operand has 105 places, 172 transitions, 1847 flow. Second operand 6 states and 641 transitions. [2023-01-28 04:53:48,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 189 transitions, 2376 flow [2023-01-28 04:53:48,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 189 transitions, 2126 flow, removed 118 selfloop flow, removed 7 redundant places. [2023-01-28 04:53:48,066 INFO L231 Difference]: Finished difference. Result has 100 places, 169 transitions, 1777 flow [2023-01-28 04:53:48,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1777, PETRI_PLACES=100, PETRI_TRANSITIONS=169} [2023-01-28 04:53:48,067 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-01-28 04:53:48,067 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 169 transitions, 1777 flow [2023-01-28 04:53:48,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 102.66666666666667) internal successors, (616), 6 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:48,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:48,068 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 04:53:48,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 04:53:48,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:48,277 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 04:53:48,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:48,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1886042083, now seen corresponding path program 1 times [2023-01-28 04:53:48,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:48,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661306117] [2023-01-28 04:53:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:48,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:48,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:49,113 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 04:53:49,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:49,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661306117] [2023-01-28 04:53:49,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661306117] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:53:49,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876041103] [2023-01-28 04:53:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:49,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:49,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:53:49,117 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 04:53:49,140 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 04:53:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:49,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-28 04:53:49,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:53:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:53:49,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:53:49,916 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:53:49,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-01-28 04:53:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:53:50,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876041103] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:53:50,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:53:50,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 27 [2023-01-28 04:53:50,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906694521] [2023-01-28 04:53:50,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:53:50,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 04:53:50,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:50,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 04:53:50,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-01-28 04:53:50,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:53:50,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 169 transitions, 1777 flow. Second operand has 29 states, 29 states have (on average 76.82758620689656) internal successors, (2228), 29 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:50,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:50,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:53:50,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:51,952 INFO L130 PetriNetUnfolder]: 532/1008 cut-off events. [2023-01-28 04:53:51,952 INFO L131 PetriNetUnfolder]: For 6967/6967 co-relation queries the response was YES. [2023-01-28 04:53:51,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5818 conditions, 1008 events. 532/1008 cut-off events. For 6967/6967 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5106 event pairs, 69 based on Foata normal form. 2/1010 useless extension candidates. Maximal degree in co-relation 5781. Up to 500 conditions per place. [2023-01-28 04:53:51,960 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 144 selfloop transitions, 83 changer transitions 7/234 dead transitions. [2023-01-28 04:53:51,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 234 transitions, 2775 flow [2023-01-28 04:53:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:53:51,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:53:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1592 transitions. [2023-01-28 04:53:51,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2937269372693727 [2023-01-28 04:53:51,966 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1592 transitions. [2023-01-28 04:53:51,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1592 transitions. [2023-01-28 04:53:51,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:51,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1592 transitions. [2023-01-28 04:53:51,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 79.6) internal successors, (1592), 20 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:51,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:51,984 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:51,984 INFO L175 Difference]: Start difference. First operand has 100 places, 169 transitions, 1777 flow. Second operand 20 states and 1592 transitions. [2023-01-28 04:53:51,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 234 transitions, 2775 flow [2023-01-28 04:53:52,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 234 transitions, 2747 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-01-28 04:53:52,023 INFO L231 Difference]: Finished difference. Result has 125 places, 186 transitions, 2181 flow [2023-01-28 04:53:52,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2181, PETRI_PLACES=125, PETRI_TRANSITIONS=186} [2023-01-28 04:53:52,023 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2023-01-28 04:53:52,023 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 186 transitions, 2181 flow [2023-01-28 04:53:52,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.82758620689656) internal successors, (2228), 29 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:52,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:52,025 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 04:53:52,033 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 04:53:52,230 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,SelfDestructingSolverStorable10 [2023-01-28 04:53:52,231 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 04:53:52,231 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:52,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2035982271, now seen corresponding path program 2 times [2023-01-28 04:53:52,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:52,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978634817] [2023-01-28 04:53:52,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:52,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:53,131 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 04:53:53,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:53,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978634817] [2023-01-28 04:53:53,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978634817] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:53:53,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566176670] [2023-01-28 04:53:53,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:53:53,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:53:53,134 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 04:53:53,136 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 04:53:53,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:53:53,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:53:53,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-28 04:53:53,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:53:53,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-01-28 04:53:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:53:53,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:53:54,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:53:54,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-01-28 04:53:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:53:54,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566176670] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:53:54,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:53:54,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2023-01-28 04:53:54,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007027358] [2023-01-28 04:53:54,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:53:54,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 04:53:54,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:54,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 04:53:54,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-01-28 04:53:54,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:53:54,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 186 transitions, 2181 flow. Second operand has 28 states, 28 states have (on average 76.89285714285714) internal successors, (2153), 28 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:54,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:54,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:53:54,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:55,440 INFO L130 PetriNetUnfolder]: 594/1157 cut-off events. [2023-01-28 04:53:55,441 INFO L131 PetriNetUnfolder]: For 9032/9032 co-relation queries the response was YES. [2023-01-28 04:53:55,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7172 conditions, 1157 events. 594/1157 cut-off events. For 9032/9032 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6337 event pairs, 60 based on Foata normal form. 2/1159 useless extension candidates. Maximal degree in co-relation 7127. Up to 849 conditions per place. [2023-01-28 04:53:55,451 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 182 selfloop transitions, 80 changer transitions 6/268 dead transitions. [2023-01-28 04:53:55,451 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 268 transitions, 3315 flow [2023-01-28 04:53:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 04:53:55,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 04:53:55,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1686 transitions. [2023-01-28 04:53:55,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2962572482867686 [2023-01-28 04:53:55,455 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1686 transitions. [2023-01-28 04:53:55,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1686 transitions. [2023-01-28 04:53:55,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:55,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1686 transitions. [2023-01-28 04:53:55,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 80.28571428571429) internal successors, (1686), 21 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:55,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:55,464 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:55,464 INFO L175 Difference]: Start difference. First operand has 125 places, 186 transitions, 2181 flow. Second operand 21 states and 1686 transitions. [2023-01-28 04:53:55,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 268 transitions, 3315 flow [2023-01-28 04:53:55,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 268 transitions, 3234 flow, removed 23 selfloop flow, removed 7 redundant places. [2023-01-28 04:53:55,501 INFO L231 Difference]: Finished difference. Result has 144 places, 211 transitions, 2648 flow [2023-01-28 04:53:55,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2102, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2648, PETRI_PLACES=144, PETRI_TRANSITIONS=211} [2023-01-28 04:53:55,502 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2023-01-28 04:53:55,502 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 211 transitions, 2648 flow [2023-01-28 04:53:55,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.89285714285714) internal successors, (2153), 28 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:55,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:55,502 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:53:55,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 04:53:55,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:55,709 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 04:53:55,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1472029166, now seen corresponding path program 5 times [2023-01-28 04:53:55,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:55,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859800437] [2023-01-28 04:53:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:55,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:53:56,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:56,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859800437] [2023-01-28 04:53:56,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859800437] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:53:56,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483314183] [2023-01-28 04:53:56,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:53:56,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:56,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:53:56,455 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 04:53:56,456 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 04:53:56,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 04:53:56,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:53:56,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 04:53:56,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:53:56,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:53:56,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 04:53:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:53:56,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:53:56,790 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:53:56,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-01-28 04:53:56,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-28 04:53:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:53:56,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483314183] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:53:56,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:53:56,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 21 [2023-01-28 04:53:56,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256415775] [2023-01-28 04:53:56,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:53:56,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 04:53:56,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:53:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 04:53:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-01-28 04:53:56,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-01-28 04:53:56,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 211 transitions, 2648 flow. Second operand has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:56,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:53:56,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-01-28 04:53:56,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:53:58,048 INFO L130 PetriNetUnfolder]: 709/1363 cut-off events. [2023-01-28 04:53:58,048 INFO L131 PetriNetUnfolder]: For 14118/14118 co-relation queries the response was YES. [2023-01-28 04:53:58,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9067 conditions, 1363 events. 709/1363 cut-off events. For 14118/14118 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7680 event pairs, 56 based on Foata normal form. 16/1379 useless extension candidates. Maximal degree in co-relation 9015. Up to 461 conditions per place. [2023-01-28 04:53:58,061 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 168 selfloop transitions, 138 changer transitions 2/308 dead transitions. [2023-01-28 04:53:58,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 308 transitions, 4300 flow [2023-01-28 04:53:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 04:53:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 04:53:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1633 transitions. [2023-01-28 04:53:58,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31714896096329387 [2023-01-28 04:53:58,065 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1633 transitions. [2023-01-28 04:53:58,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1633 transitions. [2023-01-28 04:53:58,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:53:58,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1633 transitions. [2023-01-28 04:53:58,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.94736842105263) internal successors, (1633), 19 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:58,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:58,074 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:58,074 INFO L175 Difference]: Start difference. First operand has 144 places, 211 transitions, 2648 flow. Second operand 19 states and 1633 transitions. [2023-01-28 04:53:58,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 308 transitions, 4300 flow [2023-01-28 04:53:58,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 308 transitions, 4147 flow, removed 38 selfloop flow, removed 10 redundant places. [2023-01-28 04:53:58,129 INFO L231 Difference]: Finished difference. Result has 156 places, 244 transitions, 3437 flow [2023-01-28 04:53:58,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3437, PETRI_PLACES=156, PETRI_TRANSITIONS=244} [2023-01-28 04:53:58,130 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2023-01-28 04:53:58,130 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 244 transitions, 3437 flow [2023-01-28 04:53:58,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:53:58,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:53:58,131 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 04:53:58,139 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 04:53:58,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:58,337 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 04:53:58,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:53:58,338 INFO L85 PathProgramCache]: Analyzing trace with hash 154671513, now seen corresponding path program 3 times [2023-01-28 04:53:58,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:53:58,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966528887] [2023-01-28 04:53:58,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:53:58,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:53:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:53:59,029 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 04:53:59,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:53:59,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966528887] [2023-01-28 04:53:59,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966528887] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:53:59,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828252938] [2023-01-28 04:53:59,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:53:59,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:53:59,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:53:59,031 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 04:53:59,033 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 04:53:59,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:53:59,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:53:59,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 04:53:59,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:53:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:53:59,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:00,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:00,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-01-28 04:54:00,213 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:00,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828252938] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:00,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:00,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-01-28 04:54:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691052866] [2023-01-28 04:54:00,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 04:54:00,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 04:54:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-01-28 04:54:00,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:54:00,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 244 transitions, 3437 flow. Second operand has 27 states, 27 states have (on average 76.96296296296296) internal successors, (2078), 27 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:00,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:00,219 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:54:00,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:01,038 INFO L130 PetriNetUnfolder]: 716/1388 cut-off events. [2023-01-28 04:54:01,038 INFO L131 PetriNetUnfolder]: For 16099/16099 co-relation queries the response was YES. [2023-01-28 04:54:01,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9866 conditions, 1388 events. 716/1388 cut-off events. For 16099/16099 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7948 event pairs, 161 based on Foata normal form. 2/1390 useless extension candidates. Maximal degree in co-relation 9809. Up to 1204 conditions per place. [2023-01-28 04:54:01,053 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 211 selfloop transitions, 56 changer transitions 14/281 dead transitions. [2023-01-28 04:54:01,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 281 transitions, 4234 flow [2023-01-28 04:54:01,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 04:54:01,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 04:54:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1432 transitions. [2023-01-28 04:54:01,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2935629356293563 [2023-01-28 04:54:01,056 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1432 transitions. [2023-01-28 04:54:01,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1432 transitions. [2023-01-28 04:54:01,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:01,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1432 transitions. [2023-01-28 04:54:01,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 79.55555555555556) internal successors, (1432), 18 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:01,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:01,064 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:01,064 INFO L175 Difference]: Start difference. First operand has 156 places, 244 transitions, 3437 flow. Second operand 18 states and 1432 transitions. [2023-01-28 04:54:01,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 281 transitions, 4234 flow [2023-01-28 04:54:01,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 281 transitions, 4131 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-01-28 04:54:01,138 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 3489 flow [2023-01-28 04:54:01,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3489, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2023-01-28 04:54:01,138 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2023-01-28 04:54:01,138 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 3489 flow [2023-01-28 04:54:01,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 76.96296296296296) internal successors, (2078), 27 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:01,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:01,139 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 04:54:01,151 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 04:54:01,351 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,SelfDestructingSolverStorable13 [2023-01-28 04:54:01,352 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 04:54:01,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:01,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1818685831, now seen corresponding path program 4 times [2023-01-28 04:54:01,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:01,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383540831] [2023-01-28 04:54:01,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:01,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:02,187 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 04:54:02,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:02,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383540831] [2023-01-28 04:54:02,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383540831] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:02,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531844076] [2023-01-28 04:54:02,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:54:02,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:02,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:02,189 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 04:54:02,212 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 04:54:02,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:54:02,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:02,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 04:54:02,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:02,334 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 04:54:02,375 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 15 treesize of output 11 [2023-01-28 04:54:02,419 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 04:54:02,462 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 04:54:02,784 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 04:54:02,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:03,880 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:03,880 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 2 case distinctions, treesize of input 38 treesize of output 44 [2023-01-28 04:54:03,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2023-01-28 04:54:03,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-01-28 04:54:03,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-01-28 04:54:03,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-01-28 04:54:03,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:03,906 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 2 case distinctions, treesize of input 76 treesize of output 61 [2023-01-28 04:54:03,916 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 04:54:03,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 271 [2023-01-28 04:54:03,928 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:54:03,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 80 [2023-01-28 04:54:03,941 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 04:54:03,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2023-01-28 04:54:03,958 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-01-28 04:54:03,958 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 2 case distinctions, treesize of input 76 treesize of output 1 [2023-01-28 04:54:04,020 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 04:54:04,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531844076] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:04,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:04,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-01-28 04:54:04,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084248895] [2023-01-28 04:54:04,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:04,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 04:54:04,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 04:54:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=958, Unknown=5, NotChecked=0, Total=1122 [2023-01-28 04:54:04,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 04:54:04,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 3489 flow. Second operand has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:04,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:04,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 04:54:04,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:08,975 INFO L130 PetriNetUnfolder]: 834/1618 cut-off events. [2023-01-28 04:54:08,975 INFO L131 PetriNetUnfolder]: For 21389/21389 co-relation queries the response was YES. [2023-01-28 04:54:08,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12002 conditions, 1618 events. 834/1618 cut-off events. For 21389/21389 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9617 event pairs, 64 based on Foata normal form. 4/1622 useless extension candidates. Maximal degree in co-relation 11940. Up to 858 conditions per place. [2023-01-28 04:54:08,993 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 184 selfloop transitions, 179 changer transitions 11/374 dead transitions. [2023-01-28 04:54:08,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 374 transitions, 5695 flow [2023-01-28 04:54:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 04:54:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 04:54:08,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2253 transitions. [2023-01-28 04:54:08,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26818235924294725 [2023-01-28 04:54:08,998 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2253 transitions. [2023-01-28 04:54:08,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2253 transitions. [2023-01-28 04:54:08,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:08,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2253 transitions. [2023-01-28 04:54:09,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 72.6774193548387) internal successors, (2253), 31 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:09,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:09,016 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:09,016 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 3489 flow. Second operand 31 states and 2253 transitions. [2023-01-28 04:54:09,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 374 transitions, 5695 flow [2023-01-28 04:54:09,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 374 transitions, 5549 flow, removed 8 selfloop flow, removed 14 redundant places. [2023-01-28 04:54:09,087 INFO L231 Difference]: Finished difference. Result has 192 places, 304 transitions, 4934 flow [2023-01-28 04:54:09,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4934, PETRI_PLACES=192, PETRI_TRANSITIONS=304} [2023-01-28 04:54:09,088 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2023-01-28 04:54:09,088 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 304 transitions, 4934 flow [2023-01-28 04:54:09,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:09,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:09,089 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 04:54:09,095 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 04:54:09,295 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,SelfDestructingSolverStorable14 [2023-01-28 04:54:09,295 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 04:54:09,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2088997291, now seen corresponding path program 5 times [2023-01-28 04:54:09,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:09,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740293874] [2023-01-28 04:54:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:09,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:09,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:10,042 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 04:54:10,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:10,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740293874] [2023-01-28 04:54:10,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740293874] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:10,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357108333] [2023-01-28 04:54:10,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:54:10,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:10,045 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 04:54:10,070 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 04:54:10,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:54:10,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:10,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 04:54:10,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:10,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:10,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:10,637 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:10,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2023-01-28 04:54:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:10,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357108333] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:10,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:10,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-01-28 04:54:10,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368125655] [2023-01-28 04:54:10,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:10,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 04:54:10,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:10,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 04:54:10,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-01-28 04:54:10,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:54:10,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 304 transitions, 4934 flow. Second operand has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:10,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:10,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:54:10,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:13,058 INFO L130 PetriNetUnfolder]: 841/1627 cut-off events. [2023-01-28 04:54:13,059 INFO L131 PetriNetUnfolder]: For 25619/25619 co-relation queries the response was YES. [2023-01-28 04:54:13,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13059 conditions, 1627 events. 841/1627 cut-off events. For 25619/25619 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9680 event pairs, 112 based on Foata normal form. 2/1629 useless extension candidates. Maximal degree in co-relation 12988. Up to 938 conditions per place. [2023-01-28 04:54:13,074 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 225 selfloop transitions, 113 changer transitions 14/352 dead transitions. [2023-01-28 04:54:13,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 352 transitions, 6148 flow [2023-01-28 04:54:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:54:13,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:54:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1578 transitions. [2023-01-28 04:54:13,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2911439114391144 [2023-01-28 04:54:13,077 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1578 transitions. [2023-01-28 04:54:13,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1578 transitions. [2023-01-28 04:54:13,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:13,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1578 transitions. [2023-01-28 04:54:13,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 78.9) internal successors, (1578), 20 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:13,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:13,085 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:13,085 INFO L175 Difference]: Start difference. First operand has 192 places, 304 transitions, 4934 flow. Second operand 20 states and 1578 transitions. [2023-01-28 04:54:13,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 352 transitions, 6148 flow [2023-01-28 04:54:13,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 352 transitions, 5949 flow, removed 89 selfloop flow, removed 9 redundant places. [2023-01-28 04:54:13,213 INFO L231 Difference]: Finished difference. Result has 205 places, 313 transitions, 5210 flow [2023-01-28 04:54:13,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5210, PETRI_PLACES=205, PETRI_TRANSITIONS=313} [2023-01-28 04:54:13,214 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2023-01-28 04:54:13,214 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 313 transitions, 5210 flow [2023-01-28 04:54:13,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:13,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:13,214 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 04:54:13,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 04:54:13,420 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,SelfDestructingSolverStorable15 [2023-01-28 04:54:13,420 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 04:54:13,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:13,421 INFO L85 PathProgramCache]: Analyzing trace with hash -348873531, now seen corresponding path program 6 times [2023-01-28 04:54:13,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:13,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235309367] [2023-01-28 04:54:13,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:13,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:14,243 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 04:54:14,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:14,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235309367] [2023-01-28 04:54:14,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235309367] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:14,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034927540] [2023-01-28 04:54:14,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:54:14,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:14,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:14,245 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 04:54:14,253 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 04:54:14,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:54:14,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:14,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-28 04:54:14,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:14,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:54:14,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 04:54:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:14,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:15,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:15,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 59 [2023-01-28 04:54:15,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 40 [2023-01-28 04:54:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:15,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034927540] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:15,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:15,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 29 [2023-01-28 04:54:15,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006796788] [2023-01-28 04:54:15,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:15,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 04:54:15,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:15,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 04:54:15,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=840, Unknown=2, NotChecked=0, Total=930 [2023-01-28 04:54:15,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 04:54:15,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 313 transitions, 5210 flow. Second operand has 31 states, 31 states have (on average 72.64516129032258) internal successors, (2252), 31 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:15,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:15,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 04:54:15,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:17,293 INFO L130 PetriNetUnfolder]: 854/1652 cut-off events. [2023-01-28 04:54:17,293 INFO L131 PetriNetUnfolder]: For 28566/28566 co-relation queries the response was YES. [2023-01-28 04:54:17,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13376 conditions, 1652 events. 854/1652 cut-off events. For 28566/28566 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9903 event pairs, 96 based on Foata normal form. 2/1654 useless extension candidates. Maximal degree in co-relation 13301. Up to 894 conditions per place. [2023-01-28 04:54:17,339 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 214 selfloop transitions, 152 changer transitions 6/372 dead transitions. [2023-01-28 04:54:17,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 372 transitions, 6564 flow [2023-01-28 04:54:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:54:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:54:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1512 transitions. [2023-01-28 04:54:17,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2789667896678967 [2023-01-28 04:54:17,343 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1512 transitions. [2023-01-28 04:54:17,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1512 transitions. [2023-01-28 04:54:17,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:17,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1512 transitions. [2023-01-28 04:54:17,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 75.6) internal successors, (1512), 20 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:17,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:17,351 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:17,351 INFO L175 Difference]: Start difference. First operand has 205 places, 313 transitions, 5210 flow. Second operand 20 states and 1512 transitions. [2023-01-28 04:54:17,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 372 transitions, 6564 flow [2023-01-28 04:54:17,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 372 transitions, 6467 flow, removed 11 selfloop flow, removed 14 redundant places. [2023-01-28 04:54:17,493 INFO L231 Difference]: Finished difference. Result has 214 places, 327 transitions, 5766 flow [2023-01-28 04:54:17,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5113, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5766, PETRI_PLACES=214, PETRI_TRANSITIONS=327} [2023-01-28 04:54:17,494 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2023-01-28 04:54:17,494 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 327 transitions, 5766 flow [2023-01-28 04:54:17,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 72.64516129032258) internal successors, (2252), 31 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:17,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:17,495 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 04:54:17,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 04:54:17,701 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,SelfDestructingSolverStorable16 [2023-01-28 04:54:17,701 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 04:54:17,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:17,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2032706171, now seen corresponding path program 7 times [2023-01-28 04:54:17,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:17,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103723584] [2023-01-28 04:54:17,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:17,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:18,520 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 04:54:18,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:18,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103723584] [2023-01-28 04:54:18,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103723584] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:18,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866426189] [2023-01-28 04:54:18,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:54:18,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:18,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:18,522 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 04:54:18,543 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 04:54:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:18,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2023-01-28 04:54:18,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:54:18,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 04:54:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:19,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:19,280 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:19,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2023-01-28 04:54:19,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-01-28 04:54:19,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:19,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866426189] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:19,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:19,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-01-28 04:54:19,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046812499] [2023-01-28 04:54:19,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:19,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 04:54:19,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 04:54:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2023-01-28 04:54:19,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 04:54:19,603 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 327 transitions, 5766 flow. Second operand has 31 states, 31 states have (on average 72.6774193548387) internal successors, (2253), 31 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:19,603 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:19,603 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 04:54:19,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:21,881 INFO L130 PetriNetUnfolder]: 878/1711 cut-off events. [2023-01-28 04:54:21,882 INFO L131 PetriNetUnfolder]: For 34894/34894 co-relation queries the response was YES. [2023-01-28 04:54:21,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14577 conditions, 1711 events. 878/1711 cut-off events. For 34894/34894 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 10476 event pairs, 67 based on Foata normal form. 2/1713 useless extension candidates. Maximal degree in co-relation 14498. Up to 800 conditions per place. [2023-01-28 04:54:21,898 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 206 selfloop transitions, 174 changer transitions 6/386 dead transitions. [2023-01-28 04:54:21,898 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 386 transitions, 7081 flow [2023-01-28 04:54:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:54:21,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:54:21,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1518 transitions. [2023-01-28 04:54:21,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28007380073800736 [2023-01-28 04:54:21,901 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1518 transitions. [2023-01-28 04:54:21,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1518 transitions. [2023-01-28 04:54:21,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:21,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1518 transitions. [2023-01-28 04:54:21,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 75.9) internal successors, (1518), 20 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,908 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:21,908 INFO L175 Difference]: Start difference. First operand has 214 places, 327 transitions, 5766 flow. Second operand 20 states and 1518 transitions. [2023-01-28 04:54:21,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 386 transitions, 7081 flow [2023-01-28 04:54:22,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 386 transitions, 6850 flow, removed 40 selfloop flow, removed 11 redundant places. [2023-01-28 04:54:22,077 INFO L231 Difference]: Finished difference. Result has 228 places, 334 transitions, 6104 flow [2023-01-28 04:54:22,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5543, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6104, PETRI_PLACES=228, PETRI_TRANSITIONS=334} [2023-01-28 04:54:22,078 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2023-01-28 04:54:22,078 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 334 transitions, 6104 flow [2023-01-28 04:54:22,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 72.6774193548387) internal successors, (2253), 31 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:22,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:22,079 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 04:54:22,087 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 04:54:22,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 04:54:22,285 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 04:54:22,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:22,286 INFO L85 PathProgramCache]: Analyzing trace with hash 40572893, now seen corresponding path program 8 times [2023-01-28 04:54:22,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:22,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349297809] [2023-01-28 04:54:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:22,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:23,132 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 04:54:23,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:23,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349297809] [2023-01-28 04:54:23,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349297809] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:23,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926330382] [2023-01-28 04:54:23,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:54:23,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:23,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:23,134 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 04:54:23,136 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 04:54:23,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:54:23,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:23,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-28 04:54:23,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:23,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:54:23,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 04:54:23,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-01-28 04:54:23,912 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 04:54:23,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:24,488 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q_front~0 1))) (or (< .cse0 0) (and (forall ((v_ArrVal_545 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_545) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) c_~N~0)) (= (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296) (mod (+ c_~C~0 c_~x~0) 4294967296))) (<= c_~n~0 .cse0) (< c_~q_back~0 0) (<= c_~n~0 c_~q_back~0) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0))) is different from false [2023-01-28 04:54:24,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:24,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2023-01-28 04:54:24,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-01-28 04:54:24,941 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 04:54:24,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926330382] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:24,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:24,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-28 04:54:24,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656695439] [2023-01-28 04:54:24,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:24,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 04:54:24,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:24,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 04:54:24,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=971, Unknown=1, NotChecked=64, Total=1190 [2023-01-28 04:54:24,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 04:54:24,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 334 transitions, 6104 flow. Second operand has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:24,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:24,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 04:54:24,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:29,773 INFO L130 PetriNetUnfolder]: 1213/2300 cut-off events. [2023-01-28 04:54:29,773 INFO L131 PetriNetUnfolder]: For 61246/61246 co-relation queries the response was YES. [2023-01-28 04:54:29,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21075 conditions, 2300 events. 1213/2300 cut-off events. For 61246/61246 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14626 event pairs, 80 based on Foata normal form. 4/2304 useless extension candidates. Maximal degree in co-relation 20990. Up to 1349 conditions per place. [2023-01-28 04:54:29,794 INFO L137 encePairwiseOnDemand]: 258/271 looper letters, 262 selfloop transitions, 321 changer transitions 21/604 dead transitions. [2023-01-28 04:54:29,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 604 transitions, 11196 flow [2023-01-28 04:54:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 04:54:29,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 04:54:29,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2835 transitions. [2023-01-28 04:54:29,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2827366111498953 [2023-01-28 04:54:29,800 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2835 transitions. [2023-01-28 04:54:29,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2835 transitions. [2023-01-28 04:54:29,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:29,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2835 transitions. [2023-01-28 04:54:29,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 76.62162162162163) internal successors, (2835), 37 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:29,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:29,816 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:29,816 INFO L175 Difference]: Start difference. First operand has 228 places, 334 transitions, 6104 flow. Second operand 37 states and 2835 transitions. [2023-01-28 04:54:29,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 604 transitions, 11196 flow [2023-01-28 04:54:30,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 604 transitions, 10796 flow, removed 58 selfloop flow, removed 12 redundant places. [2023-01-28 04:54:30,104 INFO L231 Difference]: Finished difference. Result has 265 places, 499 transitions, 10002 flow [2023-01-28 04:54:30,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5815, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10002, PETRI_PLACES=265, PETRI_TRANSITIONS=499} [2023-01-28 04:54:30,105 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-01-28 04:54:30,105 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 499 transitions, 10002 flow [2023-01-28 04:54:30,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:30,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:30,106 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 04:54:30,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 04:54:30,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:30,312 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 04:54:30,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:30,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1408326089, now seen corresponding path program 9 times [2023-01-28 04:54:30,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:30,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575116628] [2023-01-28 04:54:30,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:30,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:31,063 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 04:54:31,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:31,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575116628] [2023-01-28 04:54:31,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575116628] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:31,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230552415] [2023-01-28 04:54:31,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:54:31,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:31,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:31,065 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 04:54:31,066 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 04:54:31,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:54:31,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:31,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 67 conjunts are in the unsatisfiable core [2023-01-28 04:54:31,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:31,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:54:31,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 04:54:31,720 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 04:54:31,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:31,899 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (or (forall ((v_ArrVal_580 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse0) 0)) (= (mod c_~x~0 4294967296) (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296))) (forall ((v_ArrVal_580 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse0))) (or (= .cse1 0) (= .cse1 c_~N~0)))))) is different from false [2023-01-28 04:54:32,016 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:32,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 94 [2023-01-28 04:54:32,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2023-01-28 04:54:32,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2023-01-28 04:54:32,535 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 04:54:32,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230552415] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:32,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:32,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-28 04:54:32,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679408109] [2023-01-28 04:54:32,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:32,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 04:54:32,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 04:54:32,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=997, Unknown=1, NotChecked=64, Total=1190 [2023-01-28 04:54:32,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 04:54:32,540 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 499 transitions, 10002 flow. Second operand has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:32,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:32,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 04:54:32,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:33,788 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (* c_~q_front~0 4) c_~q~0.offset))) (let ((.cse0 (forall ((v_ArrVal_580 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse4) 0))) (.cse1 (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296)) (.cse2 (forall ((v_ArrVal_580 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse4))) (or (= .cse3 0) (= .cse3 c_~N~0)))))) (and (or .cse0 (= (mod c_~x~0 4294967296) .cse1)) (or (and (or .cse0 (= .cse1 (mod (+ c_~C~0 c_~x~0) 4294967296))) .cse2) (< c_~q_back~0 0) (<= c_~n~0 c_~q_back~0) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0)) .cse2))) is different from false [2023-01-28 04:54:36,580 INFO L130 PetriNetUnfolder]: 1253/2403 cut-off events. [2023-01-28 04:54:36,580 INFO L131 PetriNetUnfolder]: For 67294/67294 co-relation queries the response was YES. [2023-01-28 04:54:36,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24029 conditions, 2403 events. 1253/2403 cut-off events. For 67294/67294 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15692 event pairs, 137 based on Foata normal form. 3/2406 useless extension candidates. Maximal degree in co-relation 23931. Up to 1540 conditions per place. [2023-01-28 04:54:36,603 INFO L137 encePairwiseOnDemand]: 257/271 looper letters, 312 selfloop transitions, 282 changer transitions 10/604 dead transitions. [2023-01-28 04:54:36,603 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 604 transitions, 12362 flow [2023-01-28 04:54:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 04:54:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 04:54:36,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2209 transitions. [2023-01-28 04:54:36,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2810790176867286 [2023-01-28 04:54:36,607 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2209 transitions. [2023-01-28 04:54:36,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2209 transitions. [2023-01-28 04:54:36,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:36,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2209 transitions. [2023-01-28 04:54:36,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 76.17241379310344) internal successors, (2209), 29 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:36,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:36,616 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:36,616 INFO L175 Difference]: Start difference. First operand has 265 places, 499 transitions, 10002 flow. Second operand 29 states and 2209 transitions. [2023-01-28 04:54:36,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 604 transitions, 12362 flow [2023-01-28 04:54:36,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 604 transitions, 11532 flow, removed 371 selfloop flow, removed 18 redundant places. [2023-01-28 04:54:36,941 INFO L231 Difference]: Finished difference. Result has 281 places, 536 transitions, 10710 flow [2023-01-28 04:54:36,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9302, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10710, PETRI_PLACES=281, PETRI_TRANSITIONS=536} [2023-01-28 04:54:36,941 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 260 predicate places. [2023-01-28 04:54:36,941 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 536 transitions, 10710 flow [2023-01-28 04:54:36,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:36,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:36,942 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 04:54:36,948 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 04:54:37,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:37,148 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 04:54:37,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:37,148 INFO L85 PathProgramCache]: Analyzing trace with hash -710169045, now seen corresponding path program 10 times [2023-01-28 04:54:37,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:37,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555041428] [2023-01-28 04:54:37,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:37,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:37,875 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 04:54:37,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:37,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555041428] [2023-01-28 04:54:37,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555041428] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:37,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520871137] [2023-01-28 04:54:37,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:54:37,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:37,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:37,877 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 04:54:37,883 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 04:54:37,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:54:37,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:37,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-28 04:54:37,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:38,340 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 04:54:38,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:38,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:38,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-01-28 04:54:38,960 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 04:54:38,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520871137] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:38,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:38,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-01-28 04:54:38,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662853478] [2023-01-28 04:54:38,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:38,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 04:54:38,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:38,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 04:54:38,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-01-28 04:54:38,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:54:38,964 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 536 transitions, 10710 flow. Second operand has 32 states, 32 states have (on average 76.6875) internal successors, (2454), 32 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:38,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:38,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:54:38,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:42,315 INFO L130 PetriNetUnfolder]: 1405/2730 cut-off events. [2023-01-28 04:54:42,316 INFO L131 PetriNetUnfolder]: For 65658/65658 co-relation queries the response was YES. [2023-01-28 04:54:42,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27291 conditions, 2730 events. 1405/2730 cut-off events. For 65658/65658 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 18599 event pairs, 114 based on Foata normal form. 3/2733 useless extension candidates. Maximal degree in co-relation 27191. Up to 1137 conditions per place. [2023-01-28 04:54:42,341 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 426 selfloop transitions, 268 changer transitions 15/709 dead transitions. [2023-01-28 04:54:42,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 709 transitions, 14750 flow [2023-01-28 04:54:42,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 04:54:42,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 04:54:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2577 transitions. [2023-01-28 04:54:42,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2971632841328413 [2023-01-28 04:54:42,344 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2577 transitions. [2023-01-28 04:54:42,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2577 transitions. [2023-01-28 04:54:42,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:42,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2577 transitions. [2023-01-28 04:54:42,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 80.53125) internal successors, (2577), 32 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:42,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:42,353 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:42,354 INFO L175 Difference]: Start difference. First operand has 281 places, 536 transitions, 10710 flow. Second operand 32 states and 2577 transitions. [2023-01-28 04:54:42,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 709 transitions, 14750 flow [2023-01-28 04:54:42,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 709 transitions, 14473 flow, removed 106 selfloop flow, removed 13 redundant places. [2023-01-28 04:54:42,688 INFO L231 Difference]: Finished difference. Result has 308 places, 590 transitions, 12576 flow [2023-01-28 04:54:42,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10480, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12576, PETRI_PLACES=308, PETRI_TRANSITIONS=590} [2023-01-28 04:54:42,688 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-01-28 04:54:42,688 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 590 transitions, 12576 flow [2023-01-28 04:54:42,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 76.6875) internal successors, (2454), 32 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:42,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:42,689 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 04:54:42,693 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 04:54:42,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:42,889 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 04:54:42,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:42,890 INFO L85 PathProgramCache]: Analyzing trace with hash -451798573, now seen corresponding path program 11 times [2023-01-28 04:54:42,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:42,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024813487] [2023-01-28 04:54:42,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:42,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:43,455 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 04:54:43,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:43,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024813487] [2023-01-28 04:54:43,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024813487] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:43,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100408792] [2023-01-28 04:54:43,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:54:43,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:43,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:43,456 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 04:54:43,458 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 04:54:43,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:54:43,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:43,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 04:54:43,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:43,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:43,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:43,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2023-01-28 04:54:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:44,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100408792] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:44,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:44,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-01-28 04:54:44,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695427623] [2023-01-28 04:54:44,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:44,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 04:54:44,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:44,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 04:54:44,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-01-28 04:54:44,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:54:44,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 590 transitions, 12576 flow. Second operand has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:44,260 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:44,260 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:54:44,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:45,917 INFO L130 PetriNetUnfolder]: 1396/2704 cut-off events. [2023-01-28 04:54:45,917 INFO L131 PetriNetUnfolder]: For 71442/71442 co-relation queries the response was YES. [2023-01-28 04:54:45,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27940 conditions, 2704 events. 1396/2704 cut-off events. For 71442/71442 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18324 event pairs, 137 based on Foata normal form. 2/2706 useless extension candidates. Maximal degree in co-relation 27830. Up to 1275 conditions per place. [2023-01-28 04:54:45,943 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 438 selfloop transitions, 208 changer transitions 14/660 dead transitions. [2023-01-28 04:54:45,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 660 transitions, 15042 flow [2023-01-28 04:54:45,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 04:54:45,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 04:54:45,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1819 transitions. [2023-01-28 04:54:45,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29183378790309644 [2023-01-28 04:54:45,946 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1819 transitions. [2023-01-28 04:54:45,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1819 transitions. [2023-01-28 04:54:45,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:45,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1819 transitions. [2023-01-28 04:54:45,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 79.08695652173913) internal successors, (1819), 23 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:45,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:45,952 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:45,952 INFO L175 Difference]: Start difference. First operand has 308 places, 590 transitions, 12576 flow. Second operand 23 states and 1819 transitions. [2023-01-28 04:54:45,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 660 transitions, 15042 flow [2023-01-28 04:54:46,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 660 transitions, 14772 flow, removed 85 selfloop flow, removed 15 redundant places. [2023-01-28 04:54:46,296 INFO L231 Difference]: Finished difference. Result has 313 places, 596 transitions, 12998 flow [2023-01-28 04:54:46,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=12322, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12998, PETRI_PLACES=313, PETRI_TRANSITIONS=596} [2023-01-28 04:54:46,297 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2023-01-28 04:54:46,297 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 596 transitions, 12998 flow [2023-01-28 04:54:46,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:46,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:46,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:54:46,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 04:54:46,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-28 04:54:46,498 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 04:54:46,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:46,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1570660874, now seen corresponding path program 12 times [2023-01-28 04:54:46,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:46,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353858389] [2023-01-28 04:54:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:46,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:46,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:46,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353858389] [2023-01-28 04:54:46,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353858389] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:46,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350640440] [2023-01-28 04:54:46,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:54:46,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:46,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:46,582 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 04:54:46,608 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 04:54:46,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:54:46,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:46,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:54:46,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:46,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:54:46,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350640440] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:46,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:46,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2023-01-28 04:54:46,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666394481] [2023-01-28 04:54:46,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:46,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 04:54:46,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:46,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 04:54:46,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-01-28 04:54:46,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-01-28 04:54:46,791 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 596 transitions, 12998 flow. Second operand has 11 states, 11 states have (on average 121.63636363636364) internal successors, (1338), 11 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:46,791 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:46,791 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-01-28 04:54:46,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:47,539 INFO L130 PetriNetUnfolder]: 1564/3053 cut-off events. [2023-01-28 04:54:47,539 INFO L131 PetriNetUnfolder]: For 99287/99303 co-relation queries the response was YES. [2023-01-28 04:54:47,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31488 conditions, 3053 events. 1564/3053 cut-off events. For 99287/99303 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21256 event pairs, 167 based on Foata normal form. 124/3174 useless extension candidates. Maximal degree in co-relation 31382. Up to 1321 conditions per place. [2023-01-28 04:54:47,569 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 247 selfloop transitions, 367 changer transitions 100/724 dead transitions. [2023-01-28 04:54:47,569 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 724 transitions, 16783 flow [2023-01-28 04:54:47,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:54:47,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:54:47,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 642 transitions. [2023-01-28 04:54:47,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738007380073801 [2023-01-28 04:54:47,575 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 642 transitions. [2023-01-28 04:54:47,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 642 transitions. [2023-01-28 04:54:47,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:47,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 642 transitions. [2023-01-28 04:54:47,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:47,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:47,577 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:47,577 INFO L175 Difference]: Start difference. First operand has 313 places, 596 transitions, 12998 flow. Second operand 5 states and 642 transitions. [2023-01-28 04:54:47,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 724 transitions, 16783 flow [2023-01-28 04:54:47,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 724 transitions, 16362 flow, removed 35 selfloop flow, removed 21 redundant places. [2023-01-28 04:54:47,963 INFO L231 Difference]: Finished difference. Result has 295 places, 594 transitions, 13603 flow [2023-01-28 04:54:47,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=12584, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=13603, PETRI_PLACES=295, PETRI_TRANSITIONS=594} [2023-01-28 04:54:47,964 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 274 predicate places. [2023-01-28 04:54:47,964 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 594 transitions, 13603 flow [2023-01-28 04:54:47,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 121.63636363636364) internal successors, (1338), 11 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:47,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:47,964 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:54:47,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 04:54:48,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:48,165 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 04:54:48,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:48,165 INFO L85 PathProgramCache]: Analyzing trace with hash 791885478, now seen corresponding path program 13 times [2023-01-28 04:54:48,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:48,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121150110] [2023-01-28 04:54:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:48,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:48,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:48,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:48,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121150110] [2023-01-28 04:54:48,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121150110] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:48,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746680036] [2023-01-28 04:54:48,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:54:48,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:48,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:48,292 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 04:54:48,318 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 04:54:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:48,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:54:48,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:48,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:48,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746680036] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:48,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:48,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 04:54:48,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709901025] [2023-01-28 04:54:48,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:48,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:54:48,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:48,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:54:48,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:54:48,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 271 [2023-01-28 04:54:48,530 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 594 transitions, 13603 flow. Second operand has 18 states, 18 states have (on average 107.77777777777777) internal successors, (1940), 18 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:48,530 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:48,530 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 271 [2023-01-28 04:54:48,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:48,879 INFO L130 PetriNetUnfolder]: 510/1065 cut-off events. [2023-01-28 04:54:48,880 INFO L131 PetriNetUnfolder]: For 44438/44451 co-relation queries the response was YES. [2023-01-28 04:54:48,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12167 conditions, 1065 events. 510/1065 cut-off events. For 44438/44451 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6152 event pairs, 142 based on Foata normal form. 164/1226 useless extension candidates. Maximal degree in co-relation 12062. Up to 873 conditions per place. [2023-01-28 04:54:48,889 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 193 selfloop transitions, 4 changer transitions 69/274 dead transitions. [2023-01-28 04:54:48,890 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 274 transitions, 6670 flow [2023-01-28 04:54:48,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:54:48,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:54:48,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 888 transitions. [2023-01-28 04:54:48,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095940959409594 [2023-01-28 04:54:48,891 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 888 transitions. [2023-01-28 04:54:48,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 888 transitions. [2023-01-28 04:54:48,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:48,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 888 transitions. [2023-01-28 04:54:48,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.0) internal successors, (888), 8 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:48,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:48,895 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:48,895 INFO L175 Difference]: Start difference. First operand has 295 places, 594 transitions, 13603 flow. Second operand 8 states and 888 transitions. [2023-01-28 04:54:48,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 274 transitions, 6670 flow [2023-01-28 04:54:49,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 274 transitions, 5745 flow, removed 243 selfloop flow, removed 46 redundant places. [2023-01-28 04:54:49,065 INFO L231 Difference]: Finished difference. Result has 208 places, 205 transitions, 4097 flow [2023-01-28 04:54:49,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5155, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4097, PETRI_PLACES=208, PETRI_TRANSITIONS=205} [2023-01-28 04:54:49,068 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 187 predicate places. [2023-01-28 04:54:49,068 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 205 transitions, 4097 flow [2023-01-28 04:54:49,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.77777777777777) internal successors, (1940), 18 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:49,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:49,069 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 04:54:49,074 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 04:54:49,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:49,274 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 04:54:49,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:49,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2018294689, now seen corresponding path program 14 times [2023-01-28 04:54:49,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:49,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322290289] [2023-01-28 04:54:49,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:49,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:50,124 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 04:54:50,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:50,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322290289] [2023-01-28 04:54:50,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322290289] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:50,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834409120] [2023-01-28 04:54:50,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:54:50,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:50,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:50,129 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 04:54:50,132 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 04:54:50,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:54:50,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:50,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 63 conjunts are in the unsatisfiable core [2023-01-28 04:54:50,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:54:50,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:50,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:50,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-01-28 04:54:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:54:53,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834409120] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:53,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:53,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 27 [2023-01-28 04:54:53,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819130100] [2023-01-28 04:54:53,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:53,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 04:54:53,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 04:54:53,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-01-28 04:54:53,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:54:53,077 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 205 transitions, 4097 flow. Second operand has 29 states, 29 states have (on average 76.89655172413794) internal successors, (2230), 29 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:53,077 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:53,077 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:54:53,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:53,747 INFO L130 PetriNetUnfolder]: 469/921 cut-off events. [2023-01-28 04:54:53,748 INFO L131 PetriNetUnfolder]: For 15913/15913 co-relation queries the response was YES. [2023-01-28 04:54:53,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8447 conditions, 921 events. 469/921 cut-off events. For 15913/15913 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4719 event pairs, 76 based on Foata normal form. 1/921 useless extension candidates. Maximal degree in co-relation 8381. Up to 774 conditions per place. [2023-01-28 04:54:53,754 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 159 selfloop transitions, 52 changer transitions 31/242 dead transitions. [2023-01-28 04:54:53,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 242 transitions, 4842 flow [2023-01-28 04:54:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 04:54:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 04:54:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1500 transitions. [2023-01-28 04:54:53,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2913187026607108 [2023-01-28 04:54:53,756 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1500 transitions. [2023-01-28 04:54:53,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1500 transitions. [2023-01-28 04:54:53,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:53,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1500 transitions. [2023-01-28 04:54:53,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 78.94736842105263) internal successors, (1500), 19 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:53,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:53,761 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:53,761 INFO L175 Difference]: Start difference. First operand has 208 places, 205 transitions, 4097 flow. Second operand 19 states and 1500 transitions. [2023-01-28 04:54:53,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 242 transitions, 4842 flow [2023-01-28 04:54:53,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 242 transitions, 4563 flow, removed 56 selfloop flow, removed 14 redundant places. [2023-01-28 04:54:53,809 INFO L231 Difference]: Finished difference. Result has 175 places, 194 transitions, 3632 flow [2023-01-28 04:54:53,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3853, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3632, PETRI_PLACES=175, PETRI_TRANSITIONS=194} [2023-01-28 04:54:53,810 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2023-01-28 04:54:53,810 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 194 transitions, 3632 flow [2023-01-28 04:54:53,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.89655172413794) internal successors, (2230), 29 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:53,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:53,811 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 04:54:53,816 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 04:54:54,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:54,013 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 04:54:54,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:54,013 INFO L85 PathProgramCache]: Analyzing trace with hash 630323962, now seen corresponding path program 15 times [2023-01-28 04:54:54,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:54,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067351898] [2023-01-28 04:54:54,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:54,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:54,375 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:54:54,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:54,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067351898] [2023-01-28 04:54:54,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067351898] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:54,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352403225] [2023-01-28 04:54:54,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:54:54,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:54,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:54,376 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 04:54:54,378 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 04:54:54,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:54:54,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:54,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 04:54:54,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:54:54,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:54,873 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 04:54:54,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 04:54:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:54:54,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352403225] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:54,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:54,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 21 [2023-01-28 04:54:54,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516277381] [2023-01-28 04:54:54,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:54,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 04:54:54,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:54,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 04:54:54,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-01-28 04:54:54,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 271 [2023-01-28 04:54:54,953 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 194 transitions, 3632 flow. Second operand has 22 states, 22 states have (on average 91.36363636363636) internal successors, (2010), 22 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:54,953 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:54,953 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 271 [2023-01-28 04:54:54,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:56,078 INFO L130 PetriNetUnfolder]: 732/1380 cut-off events. [2023-01-28 04:54:56,078 INFO L131 PetriNetUnfolder]: For 22017/22017 co-relation queries the response was YES. [2023-01-28 04:54:56,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11435 conditions, 1380 events. 732/1380 cut-off events. For 22017/22017 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7457 event pairs, 59 based on Foata normal form. 88/1467 useless extension candidates. Maximal degree in co-relation 11373. Up to 413 conditions per place. [2023-01-28 04:54:56,088 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 209 selfloop transitions, 205 changer transitions 1/415 dead transitions. [2023-01-28 04:54:56,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 415 transitions, 6963 flow [2023-01-28 04:54:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 04:54:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 04:54:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3249 transitions. [2023-01-28 04:54:56,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526155849793792 [2023-01-28 04:54:56,093 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3249 transitions. [2023-01-28 04:54:56,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3249 transitions. [2023-01-28 04:54:56,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:54:56,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3249 transitions. [2023-01-28 04:54:56,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 95.55882352941177) internal successors, (3249), 34 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:56,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:56,103 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:56,103 INFO L175 Difference]: Start difference. First operand has 175 places, 194 transitions, 3632 flow. Second operand 34 states and 3249 transitions. [2023-01-28 04:54:56,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 415 transitions, 6963 flow [2023-01-28 04:54:56,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 415 transitions, 6651 flow, removed 56 selfloop flow, removed 18 redundant places. [2023-01-28 04:54:56,156 INFO L231 Difference]: Finished difference. Result has 195 places, 278 transitions, 5289 flow [2023-01-28 04:54:56,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3351, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5289, PETRI_PLACES=195, PETRI_TRANSITIONS=278} [2023-01-28 04:54:56,157 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-01-28 04:54:56,157 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 278 transitions, 5289 flow [2023-01-28 04:54:56,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 91.36363636363636) internal successors, (2010), 22 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:56,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:54:56,157 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 04:54:56,167 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 04:54:56,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 04:54:56,362 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 04:54:56,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:54:56,363 INFO L85 PathProgramCache]: Analyzing trace with hash 623757512, now seen corresponding path program 16 times [2023-01-28 04:54:56,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:54:56,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451637794] [2023-01-28 04:54:56,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:54:56,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:54:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:54:57,032 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 04:54:57,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:54:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451637794] [2023-01-28 04:54:57,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451637794] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:54:57,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785882952] [2023-01-28 04:54:57,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:54:57,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:54:57,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:54:57,034 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 04:54:57,036 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 04:54:57,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:54:57,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:54:57,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 04:54:57,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:54:57,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:54:57,335 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 19 treesize of output 21 [2023-01-28 04:54:57,402 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 04:54:57,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:54:57,448 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_834 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_834) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2023-01-28 04:54:57,493 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:54:57,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-01-28 04:54:57,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 04:54:57,713 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 04:54:57,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785882952] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:54:57,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:54:57,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-28 04:54:57,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744762716] [2023-01-28 04:54:57,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:54:57,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 04:54:57,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:54:57,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 04:54:57,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=804, Unknown=2, NotChecked=58, Total=992 [2023-01-28 04:54:57,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-01-28 04:54:57,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 278 transitions, 5289 flow. Second operand has 32 states, 32 states have (on average 91.65625) internal successors, (2933), 32 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:54:57,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:54:57,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-01-28 04:54:57,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:54:58,563 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_834 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_834) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))))) (and .cse0 (or (< c_~q_back~0 0) .cse0 (<= c_~n~0 c_~q_back~0)))) is different from false [2023-01-28 04:55:00,613 INFO L130 PetriNetUnfolder]: 1594/2987 cut-off events. [2023-01-28 04:55:00,613 INFO L131 PetriNetUnfolder]: For 55661/55671 co-relation queries the response was YES. [2023-01-28 04:55:00,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26761 conditions, 2987 events. 1594/2987 cut-off events. For 55661/55671 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19127 event pairs, 140 based on Foata normal form. 107/3089 useless extension candidates. Maximal degree in co-relation 26694. Up to 981 conditions per place. [2023-01-28 04:55:00,632 INFO L137 encePairwiseOnDemand]: 259/271 looper letters, 308 selfloop transitions, 416 changer transitions 0/732 dead transitions. [2023-01-28 04:55:00,632 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 732 transitions, 13897 flow [2023-01-28 04:55:00,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 04:55:00,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 04:55:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4032 transitions. [2023-01-28 04:55:00,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35424354243542433 [2023-01-28 04:55:00,635 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4032 transitions. [2023-01-28 04:55:00,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4032 transitions. [2023-01-28 04:55:00,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:55:00,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4032 transitions. [2023-01-28 04:55:00,640 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 96.0) internal successors, (4032), 42 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:00,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 271.0) internal successors, (11653), 43 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:00,646 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 271.0) internal successors, (11653), 43 states have internal predecessors, (11653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:00,646 INFO L175 Difference]: Start difference. First operand has 195 places, 278 transitions, 5289 flow. Second operand 42 states and 4032 transitions. [2023-01-28 04:55:00,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 732 transitions, 13897 flow [2023-01-28 04:55:00,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 732 transitions, 12322 flow, removed 649 selfloop flow, removed 11 redundant places. [2023-01-28 04:55:00,786 INFO L231 Difference]: Finished difference. Result has 243 places, 605 transitions, 11657 flow [2023-01-28 04:55:00,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4671, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=11657, PETRI_PLACES=243, PETRI_TRANSITIONS=605} [2023-01-28 04:55:00,787 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 222 predicate places. [2023-01-28 04:55:00,787 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 605 transitions, 11657 flow [2023-01-28 04:55:00,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 91.65625) internal successors, (2933), 32 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:00,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:55:00,787 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 04:55:00,793 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 04:55:00,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 04:55:00,993 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 04:55:00,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:55:00,993 INFO L85 PathProgramCache]: Analyzing trace with hash -647669827, now seen corresponding path program 17 times [2023-01-28 04:55:00,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:55:00,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249037815] [2023-01-28 04:55:00,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:55:00,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:55:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:55:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:55:01,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:55:01,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249037815] [2023-01-28 04:55:01,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249037815] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:55:01,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115481494] [2023-01-28 04:55:01,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:55:01,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:55:01,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:55:01,857 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 04:55:01,860 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 04:55:01,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 04:55:01,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:55:01,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 74 conjunts are in the unsatisfiable core [2023-01-28 04:55:01,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:55:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:55:02,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:55:02,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:55:02,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 70 [2023-01-28 04:55:03,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:55:03,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115481494] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:55:03,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:55:03,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-28 04:55:03,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717069502] [2023-01-28 04:55:03,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:55:03,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 04:55:03,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:55:03,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 04:55:03,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 04:55:03,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:55:03,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 605 transitions, 11657 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:03,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:55:03,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:55:03,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:55:07,527 INFO L130 PetriNetUnfolder]: 1720/3223 cut-off events. [2023-01-28 04:55:07,527 INFO L131 PetriNetUnfolder]: For 68690/68690 co-relation queries the response was YES. [2023-01-28 04:55:07,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32060 conditions, 3223 events. 1720/3223 cut-off events. For 68690/68690 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20886 event pairs, 156 based on Foata normal form. 4/3226 useless extension candidates. Maximal degree in co-relation 31975. Up to 1133 conditions per place. [2023-01-28 04:55:07,552 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 428 selfloop transitions, 310 changer transitions 12/750 dead transitions. [2023-01-28 04:55:07,552 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 750 transitions, 15338 flow [2023-01-28 04:55:07,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 04:55:07,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 04:55:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2688 transitions. [2023-01-28 04:55:07,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29172997612329066 [2023-01-28 04:55:07,555 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2688 transitions. [2023-01-28 04:55:07,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2688 transitions. [2023-01-28 04:55:07,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:55:07,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2688 transitions. [2023-01-28 04:55:07,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 79.05882352941177) internal successors, (2688), 34 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:07,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:07,564 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:07,564 INFO L175 Difference]: Start difference. First operand has 243 places, 605 transitions, 11657 flow. Second operand 34 states and 2688 transitions. [2023-01-28 04:55:07,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 750 transitions, 15338 flow [2023-01-28 04:55:07,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 750 transitions, 13768 flow, removed 736 selfloop flow, removed 7 redundant places. [2023-01-28 04:55:07,818 INFO L231 Difference]: Finished difference. Result has 282 places, 666 transitions, 12298 flow [2023-01-28 04:55:07,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10134, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=12298, PETRI_PLACES=282, PETRI_TRANSITIONS=666} [2023-01-28 04:55:07,818 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 261 predicate places. [2023-01-28 04:55:07,818 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 666 transitions, 12298 flow [2023-01-28 04:55:07,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:07,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:55:07,819 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 04:55:07,824 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 04:55:08,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 04:55:08,023 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 04:55:08,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:55:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 752855597, now seen corresponding path program 18 times [2023-01-28 04:55:08,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:55:08,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640421944] [2023-01-28 04:55:08,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:55:08,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:55:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:55:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:55:08,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:55:08,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640421944] [2023-01-28 04:55:08,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640421944] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:55:08,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510368140] [2023-01-28 04:55:08,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:55:08,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:55:08,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:55:08,927 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 04:55:08,929 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 04:55:09,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:55:09,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:55:09,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 04:55:09,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:55:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:55:09,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:55:10,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:55:10,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 75 [2023-01-28 04:55:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:55:10,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510368140] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:55:10,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:55:10,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-01-28 04:55:10,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829248271] [2023-01-28 04:55:10,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:55:10,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 04:55:10,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:55:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 04:55:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 04:55:10,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:55:10,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 666 transitions, 12298 flow. Second operand has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:10,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:55:10,718 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:55:10,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:55:19,373 INFO L130 PetriNetUnfolder]: 2029/3767 cut-off events. [2023-01-28 04:55:19,373 INFO L131 PetriNetUnfolder]: For 85547/85547 co-relation queries the response was YES. [2023-01-28 04:55:19,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36140 conditions, 3767 events. 2029/3767 cut-off events. For 85547/85547 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 25101 event pairs, 195 based on Foata normal form. 4/3771 useless extension candidates. Maximal degree in co-relation 36042. Up to 2722 conditions per place. [2023-01-28 04:55:19,476 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 588 selfloop transitions, 294 changer transitions 12/894 dead transitions. [2023-01-28 04:55:19,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 894 transitions, 17767 flow [2023-01-28 04:55:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 04:55:19,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 04:55:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2418 transitions. [2023-01-28 04:55:19,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2974169741697417 [2023-01-28 04:55:19,479 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2418 transitions. [2023-01-28 04:55:19,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2418 transitions. [2023-01-28 04:55:19,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:55:19,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2418 transitions. [2023-01-28 04:55:19,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 80.6) internal successors, (2418), 30 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:19,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:19,485 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:19,485 INFO L175 Difference]: Start difference. First operand has 282 places, 666 transitions, 12298 flow. Second operand 30 states and 2418 transitions. [2023-01-28 04:55:19,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 894 transitions, 17767 flow [2023-01-28 04:55:19,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 894 transitions, 17283 flow, removed 126 selfloop flow, removed 15 redundant places. [2023-01-28 04:55:19,759 INFO L231 Difference]: Finished difference. Result has 308 places, 791 transitions, 15458 flow [2023-01-28 04:55:19,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11880, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=15458, PETRI_PLACES=308, PETRI_TRANSITIONS=791} [2023-01-28 04:55:19,760 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-01-28 04:55:19,760 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 791 transitions, 15458 flow [2023-01-28 04:55:19,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:55:19,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:55:19,761 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 04:55:19,768 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 04:55:19,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:55:19,962 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 04:55:19,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:55:19,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1567382327, now seen corresponding path program 19 times [2023-01-28 04:55:19,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:55:19,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103042057] [2023-01-28 04:55:19,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:55:19,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:55:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:55:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:55:20,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:55:20,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103042057] [2023-01-28 04:55:20,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103042057] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:55:20,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132002399] [2023-01-28 04:55:20,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:55:20,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:55:20,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:55:20,787 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 04:55:20,789 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 04:55:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:55:20,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 93 conjunts are in the unsatisfiable core [2023-01-28 04:55:20,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:55:20,983 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 15 treesize of output 11 [2023-01-28 04:55:21,028 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 15 treesize of output 11 [2023-01-28 04:55:21,082 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 04:55:21,124 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 04:55:21,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:55:21,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:55:22,764 INFO L321 Elim1Store]: treesize reduction 48, result has 64.7 percent of original size [2023-01-28 04:55:22,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 388 treesize of output 313 [2023-01-28 04:55:22,779 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:55:22,781 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 230 [2023-01-28 04:55:22,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 808 treesize of output 771 [2023-01-28 04:55:22,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 479 treesize of output 453 [2023-01-28 04:55:22,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 453 treesize of output 440 [2023-01-28 04:55:22,871 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:55:22,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 456 treesize of output 455 [2023-01-28 04:55:22,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:55:22,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 627 treesize of output 657 [2023-01-28 04:55:22,992 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:55:22,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 575 treesize of output 560 [2023-01-28 04:55:23,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:55:23,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 523 treesize of output 534 [2023-01-28 04:55:23,086 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 04:55:23,125 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:55:23,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 497 treesize of output 508 [2023-01-28 04:55:23,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:55:23,188 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 5 new quantified variables, introduced 10 case distinctions, treesize of input 487 treesize of output 527 [2023-01-28 04:55:23,249 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:55:23,249 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 445 treesize of output 430 [2023-01-28 04:56:04,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:56:04,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132002399] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:56:04,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:56:04,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-01-28 04:56:04,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558637259] [2023-01-28 04:56:04,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:56:04,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 04:56:04,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:56:04,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 04:56:04,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1568, Unknown=3, NotChecked=0, Total=1806 [2023-01-28 04:56:04,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 04:56:04,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 791 transitions, 15458 flow. Second operand has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:04,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:56:04,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 04:56:04,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:56:13,100 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 04:56:16,193 INFO L130 PetriNetUnfolder]: 2389/4432 cut-off events. [2023-01-28 04:56:16,194 INFO L131 PetriNetUnfolder]: For 101798/101798 co-relation queries the response was YES. [2023-01-28 04:56:16,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44734 conditions, 4432 events. 2389/4432 cut-off events. For 101798/101798 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 30702 event pairs, 158 based on Foata normal form. 4/4435 useless extension candidates. Maximal degree in co-relation 44624. Up to 2522 conditions per place. [2023-01-28 04:56:16,241 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 530 selfloop transitions, 504 changer transitions 13/1047 dead transitions. [2023-01-28 04:56:16,241 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1047 transitions, 22212 flow [2023-01-28 04:56:16,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 04:56:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 04:56:16,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2709 transitions. [2023-01-28 04:56:16,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2701705395432333 [2023-01-28 04:56:16,244 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2709 transitions. [2023-01-28 04:56:16,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2709 transitions. [2023-01-28 04:56:16,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:56:16,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2709 transitions. [2023-01-28 04:56:16,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 73.21621621621621) internal successors, (2709), 37 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:16,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:16,254 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:16,254 INFO L175 Difference]: Start difference. First operand has 308 places, 791 transitions, 15458 flow. Second operand 37 states and 2709 transitions. [2023-01-28 04:56:16,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1047 transitions, 22212 flow [2023-01-28 04:56:16,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 1047 transitions, 21688 flow, removed 232 selfloop flow, removed 11 redundant places. [2023-01-28 04:56:17,033 INFO L231 Difference]: Finished difference. Result has 346 places, 921 transitions, 19543 flow [2023-01-28 04:56:17,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=15119, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=19543, PETRI_PLACES=346, PETRI_TRANSITIONS=921} [2023-01-28 04:56:17,034 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 325 predicate places. [2023-01-28 04:56:17,034 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 921 transitions, 19543 flow [2023-01-28 04:56:17,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:17,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:56:17,035 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 04:56:17,045 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 04:56:17,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:56:17,242 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 04:56:17,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:56:17,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1480689643, now seen corresponding path program 20 times [2023-01-28 04:56:17,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:56:17,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10785082] [2023-01-28 04:56:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:56:17,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:56:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:56:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:56:18,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:56:18,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10785082] [2023-01-28 04:56:18,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10785082] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:56:18,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746771848] [2023-01-28 04:56:18,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:56:18,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:56:18,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:56:18,624 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 04:56:18,626 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 04:56:18,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:56:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:56:18,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 83 conjunts are in the unsatisfiable core [2023-01-28 04:56:18,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:56:19,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:56:19,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:56:19,808 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:56:19,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 66 [2023-01-28 04:56:20,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:56:20,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746771848] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:56:20,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:56:20,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-01-28 04:56:20,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958444161] [2023-01-28 04:56:20,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:56:20,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 04:56:20,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:56:20,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 04:56:20,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 04:56:20,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 04:56:20,345 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 921 transitions, 19543 flow. Second operand has 42 states, 42 states have (on average 69.5) internal successors, (2919), 42 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:20,345 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:56:20,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 04:56:20,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:56:33,778 INFO L130 PetriNetUnfolder]: 3024/5641 cut-off events. [2023-01-28 04:56:33,779 INFO L131 PetriNetUnfolder]: For 156829/156829 co-relation queries the response was YES. [2023-01-28 04:56:33,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58200 conditions, 5641 events. 3024/5641 cut-off events. For 156829/156829 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 40578 event pairs, 138 based on Foata normal form. 170/5810 useless extension candidates. Maximal degree in co-relation 58076. Up to 1501 conditions per place. [2023-01-28 04:56:33,838 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 472 selfloop transitions, 821 changer transitions 66/1359 dead transitions. [2023-01-28 04:56:33,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 1359 transitions, 29669 flow [2023-01-28 04:56:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-01-28 04:56:33,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-01-28 04:56:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3674 transitions. [2023-01-28 04:56:33,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27114391143911437 [2023-01-28 04:56:33,842 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3674 transitions. [2023-01-28 04:56:33,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3674 transitions. [2023-01-28 04:56:33,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:56:33,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3674 transitions. [2023-01-28 04:56:33,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 73.48) internal successors, (3674), 50 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:33,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 271.0) internal successors, (13821), 51 states have internal predecessors, (13821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:33,896 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 271.0) internal successors, (13821), 51 states have internal predecessors, (13821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:33,896 INFO L175 Difference]: Start difference. First operand has 346 places, 921 transitions, 19543 flow. Second operand 50 states and 3674 transitions. [2023-01-28 04:56:33,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 1359 transitions, 29669 flow [2023-01-28 04:56:34,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 1359 transitions, 28855 flow, removed 161 selfloop flow, removed 17 redundant places. [2023-01-28 04:56:34,756 INFO L231 Difference]: Finished difference. Result has 393 places, 1151 transitions, 26380 flow [2023-01-28 04:56:34,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=17684, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=26380, PETRI_PLACES=393, PETRI_TRANSITIONS=1151} [2023-01-28 04:56:34,757 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 372 predicate places. [2023-01-28 04:56:34,758 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 1151 transitions, 26380 flow [2023-01-28 04:56:34,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 69.5) internal successors, (2919), 42 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:34,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:56:34,758 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 04:56:34,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 04:56:34,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-01-28 04:56:34,964 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 04:56:34,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:56:34,964 INFO L85 PathProgramCache]: Analyzing trace with hash 790216902, now seen corresponding path program 21 times [2023-01-28 04:56:34,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:56:34,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374161164] [2023-01-28 04:56:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:56:34,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:56:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:56:35,523 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:56:35,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:56:35,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374161164] [2023-01-28 04:56:35,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374161164] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:56:35,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139672465] [2023-01-28 04:56:35,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:56:35,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:56:35,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:56:35,525 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 04:56:35,553 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 04:56:35,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:56:35,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:56:35,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 04:56:35,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:56:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 04:56:36,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:56:36,121 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 04:56:36,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 04:56:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 04:56:36,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139672465] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:56:36,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:56:36,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 6] total 22 [2023-01-28 04:56:36,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215639476] [2023-01-28 04:56:36,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:56:36,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 04:56:36,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:56:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 04:56:36,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-01-28 04:56:36,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 271 [2023-01-28 04:56:36,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 1151 transitions, 26380 flow. Second operand has 23 states, 23 states have (on average 91.30434782608695) internal successors, (2100), 23 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:36,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:56:36,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 271 [2023-01-28 04:56:36,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:56:39,148 INFO L130 PetriNetUnfolder]: 3223/5994 cut-off events. [2023-01-28 04:56:39,148 INFO L131 PetriNetUnfolder]: For 172485/172485 co-relation queries the response was YES. [2023-01-28 04:56:39,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66872 conditions, 5994 events. 3223/5994 cut-off events. For 172485/172485 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 43778 event pairs, 417 based on Foata normal form. 24/6017 useless extension candidates. Maximal degree in co-relation 66735. Up to 3726 conditions per place. [2023-01-28 04:56:39,211 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 931 selfloop transitions, 482 changer transitions 3/1416 dead transitions. [2023-01-28 04:56:39,211 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 1416 transitions, 34554 flow [2023-01-28 04:56:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 04:56:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 04:56:39,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2551 transitions. [2023-01-28 04:56:39,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34864015306819734 [2023-01-28 04:56:39,214 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2551 transitions. [2023-01-28 04:56:39,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2551 transitions. [2023-01-28 04:56:39,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:56:39,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2551 transitions. [2023-01-28 04:56:39,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 94.48148148148148) internal successors, (2551), 27 states have internal predecessors, (2551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:39,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:39,219 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:39,219 INFO L175 Difference]: Start difference. First operand has 393 places, 1151 transitions, 26380 flow. Second operand 27 states and 2551 transitions. [2023-01-28 04:56:39,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 1416 transitions, 34554 flow [2023-01-28 04:56:40,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 1416 transitions, 33040 flow, removed 709 selfloop flow, removed 16 redundant places. [2023-01-28 04:56:40,734 INFO L231 Difference]: Finished difference. Result has 402 places, 1247 transitions, 28819 flow [2023-01-28 04:56:40,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=24866, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=758, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=28819, PETRI_PLACES=402, PETRI_TRANSITIONS=1247} [2023-01-28 04:56:40,735 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 381 predicate places. [2023-01-28 04:56:40,736 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 1247 transitions, 28819 flow [2023-01-28 04:56:40,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 91.30434782608695) internal successors, (2100), 23 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:40,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:56:40,736 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 04:56:40,741 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 04:56:40,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-28 04:56:40,937 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 04:56:40,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:56:40,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1919810157, now seen corresponding path program 22 times [2023-01-28 04:56:40,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:56:40,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724717939] [2023-01-28 04:56:40,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:56:40,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:56:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:56:41,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:56:41,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:56:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724717939] [2023-01-28 04:56:41,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724717939] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:56:41,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161172599] [2023-01-28 04:56:41,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:56:41,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:56:41,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:56:41,947 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 04:56:41,948 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 04:56:42,053 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:56:42,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:56:42,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-28 04:56:42,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:56:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:56:42,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:56:42,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:56:42,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 75 [2023-01-28 04:56:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:56:43,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161172599] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:56:43,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:56:43,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-01-28 04:56:43,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361955760] [2023-01-28 04:56:43,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:56:43,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 04:56:43,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:56:43,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 04:56:43,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 04:56:43,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:56:43,054 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1247 transitions, 28819 flow. Second operand has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:43,054 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:56:43,054 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:56:43,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:56:46,684 INFO L130 PetriNetUnfolder]: 3247/6043 cut-off events. [2023-01-28 04:56:46,684 INFO L131 PetriNetUnfolder]: For 169996/169996 co-relation queries the response was YES. [2023-01-28 04:56:46,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66185 conditions, 6043 events. 3247/6043 cut-off events. For 169996/169996 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 43809 event pairs, 622 based on Foata normal form. 2/6044 useless extension candidates. Maximal degree in co-relation 66047. Up to 5397 conditions per place. [2023-01-28 04:56:46,766 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1067 selfloop transitions, 243 changer transitions 14/1324 dead transitions. [2023-01-28 04:56:46,766 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1324 transitions, 32541 flow [2023-01-28 04:56:46,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 04:56:46,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 04:56:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2311 transitions. [2023-01-28 04:56:46,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2940577681638885 [2023-01-28 04:56:46,769 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2311 transitions. [2023-01-28 04:56:46,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2311 transitions. [2023-01-28 04:56:46,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:56:46,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2311 transitions. [2023-01-28 04:56:46,772 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 79.6896551724138) internal successors, (2311), 29 states have internal predecessors, (2311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:46,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:46,775 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:46,776 INFO L175 Difference]: Start difference. First operand has 402 places, 1247 transitions, 28819 flow. Second operand 29 states and 2311 transitions. [2023-01-28 04:56:46,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1324 transitions, 32541 flow [2023-01-28 04:56:48,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 1324 transitions, 32188 flow, removed 98 selfloop flow, removed 10 redundant places. [2023-01-28 04:56:48,267 INFO L231 Difference]: Finished difference. Result has 429 places, 1265 transitions, 29483 flow [2023-01-28 04:56:48,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=28468, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1006, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=29483, PETRI_PLACES=429, PETRI_TRANSITIONS=1265} [2023-01-28 04:56:48,268 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 408 predicate places. [2023-01-28 04:56:48,268 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 1265 transitions, 29483 flow [2023-01-28 04:56:48,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:48,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:56:48,269 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 04:56:48,274 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 04:56:48,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:56:48,470 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 04:56:48,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:56:48,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1786705840, now seen corresponding path program 23 times [2023-01-28 04:56:48,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:56:48,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915184006] [2023-01-28 04:56:48,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:56:48,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:56:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:56:49,280 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:56:49,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:56:49,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915184006] [2023-01-28 04:56:49,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915184006] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:56:49,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565176437] [2023-01-28 04:56:49,281 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:56:49,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:56:49,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:56:49,282 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:56:49,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 04:56:49,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 04:56:49,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:56:49,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 04:56:49,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:56:49,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:56:49,617 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 19 treesize of output 21 [2023-01-28 04:56:49,659 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:56:49,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:56:49,742 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:56:49,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-01-28 04:56:49,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 04:56:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 04:56:49,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565176437] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:56:49,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:56:49,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 29 [2023-01-28 04:56:49,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067749050] [2023-01-28 04:56:49,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:56:49,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 04:56:49,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:56:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 04:56:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=771, Unknown=4, NotChecked=0, Total=870 [2023-01-28 04:56:49,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-01-28 04:56:49,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 1265 transitions, 29483 flow. Second operand has 30 states, 30 states have (on average 82.86666666666666) internal successors, (2486), 30 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:49,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:56:49,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-01-28 04:56:49,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:56:53,773 INFO L130 PetriNetUnfolder]: 3403/6321 cut-off events. [2023-01-28 04:56:53,773 INFO L131 PetriNetUnfolder]: For 183396/183396 co-relation queries the response was YES. [2023-01-28 04:56:53,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69727 conditions, 6321 events. 3403/6321 cut-off events. For 183396/183396 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 46706 event pairs, 107 based on Foata normal form. 44/6364 useless extension candidates. Maximal degree in co-relation 69579. Up to 1764 conditions per place. [2023-01-28 04:56:53,844 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 616 selfloop transitions, 840 changer transitions 3/1459 dead transitions. [2023-01-28 04:56:53,844 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1459 transitions, 35861 flow [2023-01-28 04:56:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 04:56:53,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 04:56:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2577 transitions. [2023-01-28 04:56:53,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3169741697416974 [2023-01-28 04:56:53,847 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2577 transitions. [2023-01-28 04:56:53,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2577 transitions. [2023-01-28 04:56:53,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:56:53,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2577 transitions. [2023-01-28 04:56:53,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 85.9) internal successors, (2577), 30 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:53,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:53,855 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:53,855 INFO L175 Difference]: Start difference. First operand has 429 places, 1265 transitions, 29483 flow. Second operand 30 states and 2577 transitions. [2023-01-28 04:56:53,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1459 transitions, 35861 flow [2023-01-28 04:56:55,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1459 transitions, 35484 flow, removed 42 selfloop flow, removed 18 redundant places. [2023-01-28 04:56:55,475 INFO L231 Difference]: Finished difference. Result has 442 places, 1329 transitions, 33010 flow [2023-01-28 04:56:55,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=29116, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=782, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=33010, PETRI_PLACES=442, PETRI_TRANSITIONS=1329} [2023-01-28 04:56:55,476 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 421 predicate places. [2023-01-28 04:56:55,477 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1329 transitions, 33010 flow [2023-01-28 04:56:55,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 82.86666666666666) internal successors, (2486), 30 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:55,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:56:55,477 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 04:56:55,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 04:56:55,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:56:55,678 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:56:55,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:56:55,678 INFO L85 PathProgramCache]: Analyzing trace with hash -873840017, now seen corresponding path program 24 times [2023-01-28 04:56:55,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:56:55,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032375199] [2023-01-28 04:56:55,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:56:55,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:56:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:56:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:56:56,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:56:56,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032375199] [2023-01-28 04:56:56,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032375199] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:56:56,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260056136] [2023-01-28 04:56:56,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:56:56,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:56:56,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:56:56,690 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:56:56,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 04:56:56,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:56:56,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:56:56,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 04:56:56,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:56:57,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:56:57,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:56:57,712 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:56:57,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 78 [2023-01-28 04:56:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:56:57,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260056136] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:56:57,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:56:57,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-01-28 04:56:57,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537240045] [2023-01-28 04:56:57,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:56:57,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 04:56:57,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:56:57,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 04:56:57,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 04:56:57,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:56:57,976 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1329 transitions, 33010 flow. Second operand has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:56:57,976 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:56:57,976 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:56:57,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:57:01,779 INFO L130 PetriNetUnfolder]: 3468/6450 cut-off events. [2023-01-28 04:57:01,780 INFO L131 PetriNetUnfolder]: For 206520/206520 co-relation queries the response was YES. [2023-01-28 04:57:01,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74301 conditions, 6450 events. 3468/6450 cut-off events. For 206520/206520 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 47806 event pairs, 724 based on Foata normal form. 2/6452 useless extension candidates. Maximal degree in co-relation 74150. Up to 5975 conditions per place. [2023-01-28 04:57:01,859 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1225 selfloop transitions, 184 changer transitions 6/1415 dead transitions. [2023-01-28 04:57:01,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1415 transitions, 37601 flow [2023-01-28 04:57:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 04:57:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 04:57:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1902 transitions. [2023-01-28 04:57:01,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2924354243542435 [2023-01-28 04:57:01,862 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1902 transitions. [2023-01-28 04:57:01,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1902 transitions. [2023-01-28 04:57:01,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:57:01,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1902 transitions. [2023-01-28 04:57:01,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.25) internal successors, (1902), 24 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:01,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:01,868 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:01,868 INFO L175 Difference]: Start difference. First operand has 442 places, 1329 transitions, 33010 flow. Second operand 24 states and 1902 transitions. [2023-01-28 04:57:01,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1415 transitions, 37601 flow [2023-01-28 04:57:03,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 1415 transitions, 36852 flow, removed 164 selfloop flow, removed 17 redundant places. [2023-01-28 04:57:03,708 INFO L231 Difference]: Finished difference. Result has 457 places, 1364 transitions, 33987 flow [2023-01-28 04:57:03,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=32267, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=33987, PETRI_PLACES=457, PETRI_TRANSITIONS=1364} [2023-01-28 04:57:03,709 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 436 predicate places. [2023-01-28 04:57:03,710 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1364 transitions, 33987 flow [2023-01-28 04:57:03,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:03,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:57:03,710 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 04:57:03,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 04:57:03,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:57:03,911 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:57:03,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:57:03,911 INFO L85 PathProgramCache]: Analyzing trace with hash 466362235, now seen corresponding path program 25 times [2023-01-28 04:57:03,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:57:03,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375775376] [2023-01-28 04:57:03,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:57:03,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:57:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:57:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:57:04,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:57:04,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375775376] [2023-01-28 04:57:04,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375775376] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:57:04,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133906447] [2023-01-28 04:57:04,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:57:04,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:57:04,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:57:04,757 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:57:04,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 04:57:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:57:04,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 77 conjunts are in the unsatisfiable core [2023-01-28 04:57:04,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:57:05,436 INFO L321 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-01-28 04:57:05,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2023-01-28 04:57:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:57:05,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:57:06,067 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 04:57:06,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 66 [2023-01-28 04:57:06,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:57:06,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133906447] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:57:06,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:57:06,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-01-28 04:57:06,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661295548] [2023-01-28 04:57:06,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:57:06,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 04:57:06,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:57:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 04:57:06,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 04:57:06,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:57:06,745 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1364 transitions, 33987 flow. Second operand has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:06,746 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:57:06,746 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:57:06,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:57:17,844 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 04:57:20,927 INFO L130 PetriNetUnfolder]: 3867/7364 cut-off events. [2023-01-28 04:57:20,928 INFO L131 PetriNetUnfolder]: For 258585/258585 co-relation queries the response was YES. [2023-01-28 04:57:20,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83431 conditions, 7364 events. 3867/7364 cut-off events. For 258585/258585 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 57143 event pairs, 305 based on Foata normal form. 252/7615 useless extension candidates. Maximal degree in co-relation 83273. Up to 2026 conditions per place. [2023-01-28 04:57:21,024 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 751 selfloop transitions, 897 changer transitions 113/1761 dead transitions. [2023-01-28 04:57:21,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 1761 transitions, 44407 flow [2023-01-28 04:57:21,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-01-28 04:57:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-01-28 04:57:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4179 transitions. [2023-01-28 04:57:21,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2965512347431167 [2023-01-28 04:57:21,034 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4179 transitions. [2023-01-28 04:57:21,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4179 transitions. [2023-01-28 04:57:21,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:57:21,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4179 transitions. [2023-01-28 04:57:21,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 80.36538461538461) internal successors, (4179), 52 states have internal predecessors, (4179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:21,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 271.0) internal successors, (14363), 53 states have internal predecessors, (14363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:21,047 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 271.0) internal successors, (14363), 53 states have internal predecessors, (14363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:21,048 INFO L175 Difference]: Start difference. First operand has 457 places, 1364 transitions, 33987 flow. Second operand 52 states and 4179 transitions. [2023-01-28 04:57:21,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 1761 transitions, 44407 flow [2023-01-28 04:57:23,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 1761 transitions, 43408 flow, removed 131 selfloop flow, removed 16 redundant places. [2023-01-28 04:57:23,275 INFO L231 Difference]: Finished difference. Result has 509 places, 1463 transitions, 38349 flow [2023-01-28 04:57:23,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=30966, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=38349, PETRI_PLACES=509, PETRI_TRANSITIONS=1463} [2023-01-28 04:57:23,276 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 488 predicate places. [2023-01-28 04:57:23,276 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 1463 transitions, 38349 flow [2023-01-28 04:57:23,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:23,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:57:23,277 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 04:57:23,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 04:57:23,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-28 04:57:23,483 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:57:23,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:57:23,483 INFO L85 PathProgramCache]: Analyzing trace with hash 293114543, now seen corresponding path program 26 times [2023-01-28 04:57:23,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:57:23,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679270617] [2023-01-28 04:57:23,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:57:23,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:57:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:57:24,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:57:24,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:57:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679270617] [2023-01-28 04:57:24,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679270617] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:57:24,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135666513] [2023-01-28 04:57:24,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:57:24,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:57:24,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:57:24,529 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:57:24,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 04:57:24,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:57:24,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:57:24,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 04:57:24,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:57:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:57:25,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:57:25,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:57:25,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 66 [2023-01-28 04:57:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:57:25,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135666513] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:57:25,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:57:25,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-28 04:57:25,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926522296] [2023-01-28 04:57:25,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:57:25,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 04:57:25,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:57:25,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 04:57:25,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1221, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 04:57:25,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:57:25,978 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 1463 transitions, 38349 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:25,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:57:25,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:57:25,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:57:32,314 INFO L130 PetriNetUnfolder]: 3713/7071 cut-off events. [2023-01-28 04:57:32,315 INFO L131 PetriNetUnfolder]: For 246196/246196 co-relation queries the response was YES. [2023-01-28 04:57:32,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84227 conditions, 7071 events. 3713/7071 cut-off events. For 246196/246196 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 54080 event pairs, 336 based on Foata normal form. 2/7072 useless extension candidates. Maximal degree in co-relation 84053. Up to 2653 conditions per place. [2023-01-28 04:57:32,410 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 889 selfloop transitions, 640 changer transitions 18/1547 dead transitions. [2023-01-28 04:57:32,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 1547 transitions, 42860 flow [2023-01-28 04:57:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 04:57:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 04:57:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2456 transitions. [2023-01-28 04:57:32,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2923461492679443 [2023-01-28 04:57:32,413 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2456 transitions. [2023-01-28 04:57:32,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2456 transitions. [2023-01-28 04:57:32,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:57:32,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2456 transitions. [2023-01-28 04:57:32,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 79.2258064516129) internal successors, (2456), 31 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:32,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:32,418 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:32,418 INFO L175 Difference]: Start difference. First operand has 509 places, 1463 transitions, 38349 flow. Second operand 31 states and 2456 transitions. [2023-01-28 04:57:32,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 1547 transitions, 42860 flow [2023-01-28 04:57:35,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 1547 transitions, 41617 flow, removed 573 selfloop flow, removed 15 redundant places. [2023-01-28 04:57:35,070 INFO L231 Difference]: Finished difference. Result has 523 places, 1474 transitions, 38770 flow [2023-01-28 04:57:35,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=37160, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=629, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=38770, PETRI_PLACES=523, PETRI_TRANSITIONS=1474} [2023-01-28 04:57:35,071 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 502 predicate places. [2023-01-28 04:57:35,071 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 1474 transitions, 38770 flow [2023-01-28 04:57:35,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:35,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:57:35,072 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 04:57:35,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-01-28 04:57:35,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-28 04:57:35,273 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:57:35,273 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:57:35,273 INFO L85 PathProgramCache]: Analyzing trace with hash -301236543, now seen corresponding path program 27 times [2023-01-28 04:57:35,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:57:35,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757669773] [2023-01-28 04:57:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:57:35,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:57:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:57:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:57:35,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:57:35,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757669773] [2023-01-28 04:57:35,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757669773] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:57:35,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638601265] [2023-01-28 04:57:35,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:57:35,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:57:35,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:57:35,991 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:57:35,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 04:57:36,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:57:36,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:57:36,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 70 conjunts are in the unsatisfiable core [2023-01-28 04:57:36,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:57:36,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:57:36,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 7 [2023-01-28 04:57:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:57:36,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:57:37,199 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:57:37,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 78 [2023-01-28 04:57:37,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:57:37,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638601265] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:57:37,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:57:37,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2023-01-28 04:57:37,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529848318] [2023-01-28 04:57:37,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:57:37,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 04:57:37,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:57:37,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 04:57:37,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 04:57:37,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:57:37,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1474 transitions, 38770 flow. Second operand has 33 states, 33 states have (on average 76.78787878787878) internal successors, (2534), 33 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:37,417 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:57:37,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:57:37,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:57:41,026 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-28 04:57:44,033 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-28 04:57:46,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-01-28 04:57:50,047 INFO L130 PetriNetUnfolder]: 3760/7158 cut-off events. [2023-01-28 04:57:50,047 INFO L131 PetriNetUnfolder]: For 249148/249148 co-relation queries the response was YES. [2023-01-28 04:57:50,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84927 conditions, 7158 events. 3760/7158 cut-off events. For 249148/249148 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 55256 event pairs, 660 based on Foata normal form. 4/7162 useless extension candidates. Maximal degree in co-relation 84752. Up to 6648 conditions per place. [2023-01-28 04:57:50,137 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1325 selfloop transitions, 198 changer transitions 45/1568 dead transitions. [2023-01-28 04:57:50,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 1568 transitions, 43437 flow [2023-01-28 04:57:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 04:57:50,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 04:57:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2843 transitions. [2023-01-28 04:57:50,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29141041410414104 [2023-01-28 04:57:50,140 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2843 transitions. [2023-01-28 04:57:50,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2843 transitions. [2023-01-28 04:57:50,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:57:50,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2843 transitions. [2023-01-28 04:57:50,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 78.97222222222223) internal successors, (2843), 36 states have internal predecessors, (2843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:50,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:50,146 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:50,146 INFO L175 Difference]: Start difference. First operand has 523 places, 1474 transitions, 38770 flow. Second operand 36 states and 2843 transitions. [2023-01-28 04:57:50,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 1568 transitions, 43437 flow [2023-01-28 04:57:52,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 1568 transitions, 42846 flow, removed 26 selfloop flow, removed 21 redundant places. [2023-01-28 04:57:52,623 INFO L231 Difference]: Finished difference. Result has 541 places, 1487 transitions, 38910 flow [2023-01-28 04:57:52,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=38184, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=38910, PETRI_PLACES=541, PETRI_TRANSITIONS=1487} [2023-01-28 04:57:52,624 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 520 predicate places. [2023-01-28 04:57:52,624 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 1487 transitions, 38910 flow [2023-01-28 04:57:52,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 76.78787878787878) internal successors, (2534), 33 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:52,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:57:52,625 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 04:57:52,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-01-28 04:57:52,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 04:57:52,833 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:57:52,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:57:52,833 INFO L85 PathProgramCache]: Analyzing trace with hash 25976767, now seen corresponding path program 28 times [2023-01-28 04:57:52,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:57:52,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750759890] [2023-01-28 04:57:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:57:52,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:57:52,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:57:53,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:57:53,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:57:53,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750759890] [2023-01-28 04:57:53,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750759890] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:57:53,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069738899] [2023-01-28 04:57:53,917 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:57:53,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:57:53,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:57:53,918 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:57:53,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 04:57:54,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:57:54,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:57:54,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 04:57:54,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:57:54,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:57:54,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 04:57:54,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:57:54,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:57:55,001 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse5 c_~q~0.offset 4)) (.cse3 (+ .cse5 c_~q~0.offset)) (.cse1 (+ c_~q~0.offset (* 4 c_~q_back~0)))) (and (forall ((v_ArrVal_1307 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1307) c_~q~0.base))) (or (not (= (select .cse0 .cse1) 1)) (< |c_thread1Thread1of1ForFork0_~i~0#1| (+ (select .cse0 .cse2) (select .cse0 .cse3)))))) (forall ((v_ArrVal_1307 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1307) c_~q~0.base))) (or (not (= (select .cse4 .cse1) 1)) (< (+ (select .cse4 .cse2) (select .cse4 .cse3)) (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|))))) (or (forall ((v_ArrVal_1307 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1307) c_~q~0.base) .cse1) 1))) (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) (mod (+ (* c_~C~0 2) c_~x~0) 4294967296)))))) is different from false [2023-01-28 04:57:55,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:57:55,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 207 [2023-01-28 04:57:55,055 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:57:55,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 165 [2023-01-28 04:57:55,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:57:55,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 145 [2023-01-28 04:57:55,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 119 [2023-01-28 04:57:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:57:55,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069738899] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:57:55,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:57:55,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 38 [2023-01-28 04:57:55,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956102756] [2023-01-28 04:57:55,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:57:55,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 04:57:55,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:57:55,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 04:57:55,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1367, Unknown=1, NotChecked=74, Total=1560 [2023-01-28 04:57:55,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 04:57:55,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1487 transitions, 38910 flow. Second operand has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:57:55,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:57:55,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 04:57:55,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:03,136 INFO L130 PetriNetUnfolder]: 3779/7209 cut-off events. [2023-01-28 04:58:03,136 INFO L131 PetriNetUnfolder]: For 242578/242578 co-relation queries the response was YES. [2023-01-28 04:58:03,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85513 conditions, 7209 events. 3779/7209 cut-off events. For 242578/242578 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 55506 event pairs, 444 based on Foata normal form. 4/7212 useless extension candidates. Maximal degree in co-relation 85332. Up to 6073 conditions per place. [2023-01-28 04:58:03,249 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1198 selfloop transitions, 362 changer transitions 8/1568 dead transitions. [2023-01-28 04:58:03,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 1568 transitions, 43263 flow [2023-01-28 04:58:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 04:58:03,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 04:58:03,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1898 transitions. [2023-01-28 04:58:03,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28014760147601475 [2023-01-28 04:58:03,253 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1898 transitions. [2023-01-28 04:58:03,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1898 transitions. [2023-01-28 04:58:03,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:03,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1898 transitions. [2023-01-28 04:58:03,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 75.92) internal successors, (1898), 25 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:03,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 271.0) internal successors, (7046), 26 states have internal predecessors, (7046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:03,260 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 271.0) internal successors, (7046), 26 states have internal predecessors, (7046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:03,260 INFO L175 Difference]: Start difference. First operand has 541 places, 1487 transitions, 38910 flow. Second operand 25 states and 1898 transitions. [2023-01-28 04:58:03,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 1568 transitions, 43263 flow [2023-01-28 04:58:05,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 1568 transitions, 42661 flow, removed 66 selfloop flow, removed 33 redundant places. [2023-01-28 04:58:05,711 INFO L231 Difference]: Finished difference. Result has 534 places, 1504 transitions, 39705 flow [2023-01-28 04:58:05,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=38311, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=39705, PETRI_PLACES=534, PETRI_TRANSITIONS=1504} [2023-01-28 04:58:05,712 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 513 predicate places. [2023-01-28 04:58:05,713 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 1504 transitions, 39705 flow [2023-01-28 04:58:05,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:05,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:05,713 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 04:58:05,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 04:58:05,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 04:58:05,919 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:58:05,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:05,919 INFO L85 PathProgramCache]: Analyzing trace with hash -94169631, now seen corresponding path program 29 times [2023-01-28 04:58:05,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:05,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52269993] [2023-01-28 04:58:05,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:05,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:06,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:06,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52269993] [2023-01-28 04:58:06,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52269993] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:06,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102288997] [2023-01-28 04:58:06,803 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:58:06,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:06,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:06,804 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:58:06,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 04:58:06,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 04:58:06,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:06,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 98 conjunts are in the unsatisfiable core [2023-01-28 04:58:06,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:06,981 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 04:58:07,030 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 04:58:07,070 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 13 treesize of output 9 [2023-01-28 04:58:07,125 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 04:58:07,167 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 04:58:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:07,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:09,662 INFO L321 Elim1Store]: treesize reduction 35, result has 58.8 percent of original size [2023-01-28 04:58:09,662 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 3 case distinctions, treesize of input 180 treesize of output 121 [2023-01-28 04:58:09,778 INFO L321 Elim1Store]: treesize reduction 13, result has 88.1 percent of original size [2023-01-28 04:58:09,779 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 575 treesize of output 585 [2023-01-28 04:58:09,818 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:58:09,821 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:58:09,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:09,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 170 treesize of output 164 [2023-01-28 04:58:09,875 INFO L321 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-01-28 04:58:09,876 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 137 [2023-01-28 04:58:11,148 INFO L321 Elim1Store]: treesize reduction 35, result has 58.8 percent of original size [2023-01-28 04:58:11,149 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 3 case distinctions, treesize of input 92 treesize of output 87 [2023-01-28 04:58:11,184 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:11,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 188 [2023-01-28 04:58:11,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:11,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 106 [2023-01-28 04:58:11,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:11,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 93 [2023-01-28 04:58:11,340 INFO L321 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2023-01-28 04:58:11,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 1 [2023-01-28 04:58:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:11,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102288997] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:11,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:11,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 39 [2023-01-28 04:58:11,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331871804] [2023-01-28 04:58:11,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:11,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 04:58:11,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:11,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 04:58:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1381, Unknown=7, NotChecked=0, Total=1640 [2023-01-28 04:58:11,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 04:58:11,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 1504 transitions, 39705 flow. Second operand has 41 states, 41 states have (on average 69.46341463414635) internal successors, (2848), 41 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:11,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:11,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 04:58:11,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:58:22,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:58:43,316 WARN L222 SmtUtils]: Spent 13.69s on a formula simplification. DAG size of input: 135 DAG size of output: 102 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 04:58:48,912 INFO L130 PetriNetUnfolder]: 3931/7501 cut-off events. [2023-01-28 04:58:48,912 INFO L131 PetriNetUnfolder]: For 256586/256586 co-relation queries the response was YES. [2023-01-28 04:58:48,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89665 conditions, 7501 events. 3931/7501 cut-off events. For 256586/256586 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 58148 event pairs, 601 based on Foata normal form. 6/7506 useless extension candidates. Maximal degree in co-relation 89483. Up to 6734 conditions per place. [2023-01-28 04:58:49,019 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1362 selfloop transitions, 281 changer transitions 34/1677 dead transitions. [2023-01-28 04:58:49,019 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 1677 transitions, 46159 flow [2023-01-28 04:58:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-01-28 04:58:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-01-28 04:58:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2907 transitions. [2023-01-28 04:58:49,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26817343173431735 [2023-01-28 04:58:49,022 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2907 transitions. [2023-01-28 04:58:49,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2907 transitions. [2023-01-28 04:58:49,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:58:49,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2907 transitions. [2023-01-28 04:58:49,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 72.675) internal successors, (2907), 40 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:49,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 271.0) internal successors, (11111), 41 states have internal predecessors, (11111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:49,028 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 271.0) internal successors, (11111), 41 states have internal predecessors, (11111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:49,028 INFO L175 Difference]: Start difference. First operand has 534 places, 1504 transitions, 39705 flow. Second operand 40 states and 2907 transitions. [2023-01-28 04:58:49,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 1677 transitions, 46159 flow [2023-01-28 04:58:51,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 1677 transitions, 45649 flow, removed 82 selfloop flow, removed 13 redundant places. [2023-01-28 04:58:51,825 INFO L231 Difference]: Finished difference. Result has 573 places, 1568 transitions, 41640 flow [2023-01-28 04:58:51,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=39199, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=41640, PETRI_PLACES=573, PETRI_TRANSITIONS=1568} [2023-01-28 04:58:51,827 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 552 predicate places. [2023-01-28 04:58:51,827 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 1568 transitions, 41640 flow [2023-01-28 04:58:51,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 69.46341463414635) internal successors, (2848), 41 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:51,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:58:51,828 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 04:58:51,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-01-28 04:58:52,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 04:58:52,034 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:58:52,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:58:52,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1578405753, now seen corresponding path program 30 times [2023-01-28 04:58:52,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:58:52,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384463197] [2023-01-28 04:58:52,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:58:52,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:58:52,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:58:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:52,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:58:52,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384463197] [2023-01-28 04:58:52,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384463197] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:58:52,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956423028] [2023-01-28 04:58:52,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:58:52,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:58:52,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:58:52,920 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:58:52,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 04:58:53,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:58:53,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:58:53,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 81 conjunts are in the unsatisfiable core [2023-01-28 04:58:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:58:53,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:58:53,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:58:53,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 20 [2023-01-28 04:58:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:53,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:58:54,227 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 04:58:54,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 77 [2023-01-28 04:58:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:58:55,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956423028] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:58:55,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:58:55,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-01-28 04:58:55,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324668402] [2023-01-28 04:58:55,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:58:55,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 04:58:55,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:58:55,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 04:58:55,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 04:58:55,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:58:55,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 1568 transitions, 41640 flow. Second operand has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:58:55,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:58:55,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:58:55,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:07,915 INFO L130 PetriNetUnfolder]: 4414/8539 cut-off events. [2023-01-28 04:59:07,916 INFO L131 PetriNetUnfolder]: For 304426/304426 co-relation queries the response was YES. [2023-01-28 04:59:08,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101199 conditions, 8539 events. 4414/8539 cut-off events. For 304426/304426 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 69497 event pairs, 577 based on Foata normal form. 161/8699 useless extension candidates. Maximal degree in co-relation 101003. Up to 2695 conditions per place. [2023-01-28 04:59:08,041 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 961 selfloop transitions, 932 changer transitions 74/1967 dead transitions. [2023-01-28 04:59:08,042 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 1967 transitions, 54027 flow [2023-01-28 04:59:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 04:59:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 04:59:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2899 transitions. [2023-01-28 04:59:08,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2971504715047151 [2023-01-28 04:59:08,045 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2899 transitions. [2023-01-28 04:59:08,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2899 transitions. [2023-01-28 04:59:08,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:08,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2899 transitions. [2023-01-28 04:59:08,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 80.52777777777777) internal successors, (2899), 36 states have internal predecessors, (2899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:08,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:08,051 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:08,051 INFO L175 Difference]: Start difference. First operand has 573 places, 1568 transitions, 41640 flow. Second operand 36 states and 2899 transitions. [2023-01-28 04:59:08,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 1967 transitions, 54027 flow [2023-01-28 04:59:11,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 1967 transitions, 53258 flow, removed 276 selfloop flow, removed 26 redundant places. [2023-01-28 04:59:11,451 INFO L231 Difference]: Finished difference. Result has 592 places, 1773 transitions, 50153 flow [2023-01-28 04:59:11,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=39473, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=659, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=762, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=50153, PETRI_PLACES=592, PETRI_TRANSITIONS=1773} [2023-01-28 04:59:11,452 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 571 predicate places. [2023-01-28 04:59:11,452 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1773 transitions, 50153 flow [2023-01-28 04:59:11,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:11,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:59:11,453 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 04:59:11,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-28 04:59:11,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:11,653 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:59:11,654 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:59:11,654 INFO L85 PathProgramCache]: Analyzing trace with hash 966037547, now seen corresponding path program 31 times [2023-01-28 04:59:11,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:59:11,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881784354] [2023-01-28 04:59:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:59:11,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:59:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:12,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:12,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:12,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881784354] [2023-01-28 04:59:12,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881784354] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:12,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641092467] [2023-01-28 04:59:12,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:59:12,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:12,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:12,360 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:59:12,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 04:59:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:12,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 82 conjunts are in the unsatisfiable core [2023-01-28 04:59:12,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:13,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:13,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:13,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 67 [2023-01-28 04:59:14,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:14,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641092467] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:14,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:14,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-01-28 04:59:14,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113851435] [2023-01-28 04:59:14,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:14,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 04:59:14,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:14,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 04:59:14,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 04:59:14,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:59:14,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1773 transitions, 50153 flow. Second operand has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:14,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:14,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:59:14,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:24,976 INFO L130 PetriNetUnfolder]: 4432/8588 cut-off events. [2023-01-28 04:59:24,976 INFO L131 PetriNetUnfolder]: For 294337/294337 co-relation queries the response was YES. [2023-01-28 04:59:25,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103722 conditions, 8588 events. 4432/8588 cut-off events. For 294337/294337 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 69501 event pairs, 293 based on Foata normal form. 9/8596 useless extension candidates. Maximal degree in co-relation 103519. Up to 3230 conditions per place. [2023-01-28 04:59:25,099 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1177 selfloop transitions, 758 changer transitions 40/1975 dead transitions. [2023-01-28 04:59:25,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 1975 transitions, 58336 flow [2023-01-28 04:59:25,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 04:59:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 04:59:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2868 transitions. [2023-01-28 04:59:25,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2939729397293973 [2023-01-28 04:59:25,102 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2868 transitions. [2023-01-28 04:59:25,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2868 transitions. [2023-01-28 04:59:25,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:25,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2868 transitions. [2023-01-28 04:59:25,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 79.66666666666667) internal successors, (2868), 36 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:25,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:25,112 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:25,112 INFO L175 Difference]: Start difference. First operand has 592 places, 1773 transitions, 50153 flow. Second operand 36 states and 2868 transitions. [2023-01-28 04:59:25,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 1975 transitions, 58336 flow [2023-01-28 04:59:29,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1975 transitions, 57323 flow, removed 470 selfloop flow, removed 15 redundant places. [2023-01-28 04:59:29,959 INFO L231 Difference]: Finished difference. Result has 618 places, 1852 transitions, 53238 flow [2023-01-28 04:59:29,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=49222, PETRI_DIFFERENCE_MINUEND_PLACES=573, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=674, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1033, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=53238, PETRI_PLACES=618, PETRI_TRANSITIONS=1852} [2023-01-28 04:59:29,961 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 597 predicate places. [2023-01-28 04:59:29,961 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 1852 transitions, 53238 flow [2023-01-28 04:59:29,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:29,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:59:29,962 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 04:59:29,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-28 04:59:30,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:30,168 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:59:30,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:59:30,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1405158061, now seen corresponding path program 32 times [2023-01-28 04:59:30,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:59:30,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402366189] [2023-01-28 04:59:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:59:30,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:59:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:31,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:31,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402366189] [2023-01-28 04:59:31,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402366189] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:31,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951829384] [2023-01-28 04:59:31,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:59:31,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:31,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:31,011 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:59:31,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-01-28 04:59:31,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:59:31,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:59:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 04:59:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:59:31,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:31,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:31,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 67 [2023-01-28 04:59:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:59:32,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951829384] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:32,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:32,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-28 04:59:32,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302554292] [2023-01-28 04:59:32,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:32,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 04:59:32,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:32,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 04:59:32,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1215, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 04:59:32,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:59:32,477 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 1852 transitions, 53238 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:32,477 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:32,477 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:59:32,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:41,002 INFO L130 PetriNetUnfolder]: 4389/8473 cut-off events. [2023-01-28 04:59:41,002 INFO L131 PetriNetUnfolder]: For 296876/296876 co-relation queries the response was YES. [2023-01-28 04:59:41,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103636 conditions, 8473 events. 4389/8473 cut-off events. For 296876/296876 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 68161 event pairs, 369 based on Foata normal form. 3/8475 useless extension candidates. Maximal degree in co-relation 103428. Up to 3322 conditions per place. [2023-01-28 04:59:41,126 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1258 selfloop transitions, 651 changer transitions 23/1932 dead transitions. [2023-01-28 04:59:41,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 1932 transitions, 58360 flow [2023-01-28 04:59:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 04:59:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 04:59:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2600 transitions. [2023-01-28 04:59:41,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.290730180029073 [2023-01-28 04:59:41,130 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2600 transitions. [2023-01-28 04:59:41,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2600 transitions. [2023-01-28 04:59:41,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:41,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2600 transitions. [2023-01-28 04:59:41,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 78.78787878787878) internal successors, (2600), 33 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:41,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:41,138 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 271.0) internal successors, (9214), 34 states have internal predecessors, (9214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:41,138 INFO L175 Difference]: Start difference. First operand has 618 places, 1852 transitions, 53238 flow. Second operand 33 states and 2600 transitions. [2023-01-28 04:59:41,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 1932 transitions, 58360 flow [2023-01-28 04:59:45,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 1932 transitions, 57728 flow, removed 128 selfloop flow, removed 19 redundant places. [2023-01-28 04:59:45,573 INFO L231 Difference]: Finished difference. Result has 631 places, 1857 transitions, 54057 flow [2023-01-28 04:59:45,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=52625, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1852, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=54057, PETRI_PLACES=631, PETRI_TRANSITIONS=1857} [2023-01-28 04:59:45,575 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 610 predicate places. [2023-01-28 04:59:45,575 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 1857 transitions, 54057 flow [2023-01-28 04:59:45,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:45,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:59:45,575 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 04:59:45,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-01-28 04:59:45,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:45,776 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 04:59:45,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:59:45,776 INFO L85 PathProgramCache]: Analyzing trace with hash -764727611, now seen corresponding path program 33 times [2023-01-28 04:59:45,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:59:45,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590027620] [2023-01-28 04:59:45,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:59:45,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:59:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:59:46,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:59:46,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:59:46,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590027620] [2023-01-28 04:59:46,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590027620] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:59:46,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287590584] [2023-01-28 04:59:46,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:59:46,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:59:46,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:59:46,538 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:59:46,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-28 04:59:46,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:59:46,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:59:46,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 69 conjunts are in the unsatisfiable core [2023-01-28 04:59:46,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:59:47,151 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:47,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 7 [2023-01-28 04:59:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:59:47,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:59:47,695 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:59:47,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 92 treesize of output 77 [2023-01-28 04:59:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 04:59:48,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287590584] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:59:48,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:59:48,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2023-01-28 04:59:48,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920402580] [2023-01-28 04:59:48,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:59:48,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 04:59:48,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:59:48,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 04:59:48,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 04:59:48,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 04:59:48,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 1857 transitions, 54057 flow. Second operand has 33 states, 33 states have (on average 76.78787878787878) internal successors, (2534), 33 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:48,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:59:48,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 04:59:48,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:59:55,778 INFO L130 PetriNetUnfolder]: 4443/8576 cut-off events. [2023-01-28 04:59:55,779 INFO L131 PetriNetUnfolder]: For 313246/313246 co-relation queries the response was YES. [2023-01-28 04:59:55,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105840 conditions, 8576 events. 4443/8576 cut-off events. For 313246/313246 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 69040 event pairs, 826 based on Foata normal form. 4/8580 useless extension candidates. Maximal degree in co-relation 105632. Up to 7170 conditions per place. [2023-01-28 04:59:55,905 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1511 selfloop transitions, 434 changer transitions 13/1958 dead transitions. [2023-01-28 04:59:55,905 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 1958 transitions, 59392 flow [2023-01-28 04:59:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 04:59:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 04:59:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2397 transitions. [2023-01-28 04:59:55,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2948339483394834 [2023-01-28 04:59:55,908 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2397 transitions. [2023-01-28 04:59:55,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2397 transitions. [2023-01-28 04:59:55,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:59:55,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2397 transitions. [2023-01-28 04:59:55,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 79.9) internal successors, (2397), 30 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:55,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:55,913 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:59:55,913 INFO L175 Difference]: Start difference. First operand has 631 places, 1857 transitions, 54057 flow. Second operand 30 states and 2397 transitions. [2023-01-28 04:59:55,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 1958 transitions, 59392 flow [2023-01-28 05:00:00,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 635 places, 1958 transitions, 58638 flow, removed 44 selfloop flow, removed 20 redundant places. [2023-01-28 05:00:00,171 INFO L231 Difference]: Finished difference. Result has 644 places, 1883 transitions, 55151 flow [2023-01-28 05:00:00,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=53312, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=55151, PETRI_PLACES=644, PETRI_TRANSITIONS=1883} [2023-01-28 05:00:00,172 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 623 predicate places. [2023-01-28 05:00:00,172 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 1883 transitions, 55151 flow [2023-01-28 05:00:00,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 76.78787878787878) internal successors, (2534), 33 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:00:00,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:00:00,173 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 05:00:00,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-01-28 05:00:00,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-01-28 05:00:00,373 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:00:00,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:00:00,374 INFO L85 PathProgramCache]: Analyzing trace with hash 402226949, now seen corresponding path program 34 times [2023-01-28 05:00:00,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:00:00,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472377077] [2023-01-28 05:00:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:00:00,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:00:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:00:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:00:01,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:00:01,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472377077] [2023-01-28 05:00:01,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472377077] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:00:01,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301463559] [2023-01-28 05:00:01,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:00:01,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:00:01,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:00:01,111 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:00:01,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-28 05:00:01,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:00:01,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:00:01,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 91 conjunts are in the unsatisfiable core [2023-01-28 05:00:01,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:00:01,297 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 15 treesize of output 11 [2023-01-28 05:00:01,340 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 15 treesize of output 11 [2023-01-28 05:00:01,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 05:00:01,433 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 05:00:01,474 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 05:00:01,845 INFO L321 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-01-28 05:00:01,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2023-01-28 05:00:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:00:02,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:00:09,327 WARN L222 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:00:20,710 WARN L222 SmtUtils]: Spent 10.42s on a formula simplification that was a NOOP. DAG size: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:00:20,985 INFO L321 Elim1Store]: treesize reduction 156, result has 49.2 percent of original size [2023-01-28 05:00:20,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 515 treesize of output 433 [2023-01-28 05:00:21,001 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:21,005 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 305 [2023-01-28 05:00:21,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 866 treesize of output 837 [2023-01-28 05:00:21,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:21,081 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 565 treesize of output 589 [2023-01-28 05:00:21,108 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:21,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 518 treesize of output 503 [2023-01-28 05:00:21,135 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:21,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 494 treesize of output 491 [2023-01-28 05:00:21,254 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:21,255 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 700 treesize of output 771 [2023-01-28 05:00:21,336 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:21,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 628 treesize of output 623 [2023-01-28 05:00:21,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:21,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 578 treesize of output 598 [2023-01-28 05:00:21,440 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 05:00:21,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:21,634 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 6 new quantified variables, introduced 15 case distinctions, treesize of input 588 treesize of output 671 [2023-01-28 05:00:21,740 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:21,740 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 528 treesize of output 548 [2023-01-28 05:00:21,834 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:00:21,835 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 503 treesize of output 498 [2023-01-28 05:01:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:01:35,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301463559] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:01:35,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:01:35,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-01-28 05:01:35,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778874703] [2023-01-28 05:01:35,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:01:35,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 05:01:35,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:01:35,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 05:01:35,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1558, Unknown=6, NotChecked=0, Total=1806 [2023-01-28 05:01:35,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 05:01:35,361 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 1883 transitions, 55151 flow. Second operand has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:01:35,361 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:01:35,361 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 05:01:35,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:01:44,443 WARN L222 SmtUtils]: Spent 8.52s on a formula simplification. DAG size of input: 102 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:01:46,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:02:00,360 WARN L222 SmtUtils]: Spent 12.68s on a formula simplification. DAG size of input: 96 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:02:03,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:02:05,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:02:08,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:02:11,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:02:13,615 WARN L539 Checker$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 05:02:26,655 WARN L222 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 110 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:02:45,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:02:47,241 INFO L130 PetriNetUnfolder]: 4677/9062 cut-off events. [2023-01-28 05:02:47,242 INFO L131 PetriNetUnfolder]: For 330722/330722 co-relation queries the response was YES. [2023-01-28 05:02:47,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112225 conditions, 9062 events. 4677/9062 cut-off events. For 330722/330722 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 74054 event pairs, 585 based on Foata normal form. 6/9067 useless extension candidates. Maximal degree in co-relation 112009. Up to 4670 conditions per place. [2023-01-28 05:02:47,410 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1384 selfloop transitions, 692 changer transitions 33/2109 dead transitions. [2023-01-28 05:02:47,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 682 places, 2109 transitions, 63899 flow [2023-01-28 05:02:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 05:02:47,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 05:02:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2988 transitions. [2023-01-28 05:02:47,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2689226892268923 [2023-01-28 05:02:47,413 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2988 transitions. [2023-01-28 05:02:47,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2988 transitions. [2023-01-28 05:02:47,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:02:47,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2988 transitions. [2023-01-28 05:02:47,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 72.8780487804878) internal successors, (2988), 41 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:02:47,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:02:47,420 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 271.0) internal successors, (11382), 42 states have internal predecessors, (11382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:02:47,420 INFO L175 Difference]: Start difference. First operand has 644 places, 1883 transitions, 55151 flow. Second operand 41 states and 2988 transitions. [2023-01-28 05:02:47,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 682 places, 2109 transitions, 63899 flow [2023-01-28 05:02:53,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 662 places, 2109 transitions, 63204 flow, removed 98 selfloop flow, removed 20 redundant places. [2023-01-28 05:02:53,270 INFO L231 Difference]: Finished difference. Result has 676 places, 1976 transitions, 58891 flow [2023-01-28 05:02:53,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=54486, PETRI_DIFFERENCE_MINUEND_PLACES=622, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=598, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=58891, PETRI_PLACES=676, PETRI_TRANSITIONS=1976} [2023-01-28 05:02:53,271 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 655 predicate places. [2023-01-28 05:02:53,271 INFO L495 AbstractCegarLoop]: Abstraction has has 676 places, 1976 transitions, 58891 flow [2023-01-28 05:02:53,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:02:53,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:02:53,272 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 05:02:53,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-28 05:02:53,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-01-28 05:02:53,477 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:02:53,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:02:53,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1326623881, now seen corresponding path program 35 times [2023-01-28 05:02:53,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:02:53,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304228555] [2023-01-28 05:02:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:02:53,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:02:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:02:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:02:54,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:02:54,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304228555] [2023-01-28 05:02:54,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304228555] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:02:54,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796435213] [2023-01-28 05:02:54,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:02:54,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:02:54,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:02:54,347 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:02:54,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-28 05:02:54,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:02:54,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:02:54,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 05:02:54,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:02:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:02:55,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:02:55,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:02:55,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 73 [2023-01-28 05:02:55,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:02:55,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796435213] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:02:55,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:02:55,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-28 05:02:55,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117444969] [2023-01-28 05:02:55,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:02:55,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 05:02:55,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:02:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 05:02:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 05:02:55,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 05:02:55,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 676 places, 1976 transitions, 58891 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:02:55,996 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:02:55,996 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 05:02:55,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:03:05,478 INFO L130 PetriNetUnfolder]: 4684/9076 cut-off events. [2023-01-28 05:03:05,478 INFO L131 PetriNetUnfolder]: For 354057/354057 co-relation queries the response was YES. [2023-01-28 05:03:05,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114644 conditions, 9076 events. 4684/9076 cut-off events. For 354057/354057 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 74178 event pairs, 619 based on Foata normal form. 5/9080 useless extension candidates. Maximal degree in co-relation 114417. Up to 3833 conditions per place. [2023-01-28 05:03:05,630 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1485 selfloop transitions, 580 changer transitions 29/2094 dead transitions. [2023-01-28 05:03:05,630 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 2094 transitions, 64996 flow [2023-01-28 05:03:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 05:03:05,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 05:03:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3000 transitions. [2023-01-28 05:03:05,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2913187026607108 [2023-01-28 05:03:05,633 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3000 transitions. [2023-01-28 05:03:05,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3000 transitions. [2023-01-28 05:03:05,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:03:05,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3000 transitions. [2023-01-28 05:03:05,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 78.94736842105263) internal successors, (3000), 38 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:03:05,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 271.0) internal successors, (10569), 39 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:03:05,639 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 271.0) internal successors, (10569), 39 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:03:05,640 INFO L175 Difference]: Start difference. First operand has 676 places, 1976 transitions, 58891 flow. Second operand 38 states and 3000 transitions. [2023-01-28 05:03:05,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 2094 transitions, 64996 flow [2023-01-28 05:03:11,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 691 places, 2094 transitions, 64000 flow, removed 163 selfloop flow, removed 17 redundant places. [2023-01-28 05:03:11,328 INFO L231 Difference]: Finished difference. Result has 697 places, 2008 transitions, 60364 flow [2023-01-28 05:03:11,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=57921, PETRI_DIFFERENCE_MINUEND_PLACES=654, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1976, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=545, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=60364, PETRI_PLACES=697, PETRI_TRANSITIONS=2008} [2023-01-28 05:03:11,329 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 676 predicate places. [2023-01-28 05:03:11,329 INFO L495 AbstractCegarLoop]: Abstraction has has 697 places, 2008 transitions, 60364 flow [2023-01-28 05:03:11,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:03:11,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:03:11,330 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 05:03:11,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-28 05:03:11,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-01-28 05:03:11,531 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:03:11,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:03:11,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1938992087, now seen corresponding path program 36 times [2023-01-28 05:03:11,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:03:11,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708011230] [2023-01-28 05:03:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:03:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:03:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:03:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:03:12,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:03:12,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708011230] [2023-01-28 05:03:12,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708011230] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:03:12,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707902039] [2023-01-28 05:03:12,445 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:03:12,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:03:12,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:03:12,446 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:03:12,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-28 05:03:12,644 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:03:12,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:03:12,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 96 conjunts are in the unsatisfiable core [2023-01-28 05:03:12,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:03:12,779 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 05:03:12,852 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 05:03:12,924 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 05:03:12,980 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 05:03:13,458 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:03:13,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:03:13,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:03:13,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 15 [2023-01-28 05:03:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:03:13,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:03:15,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:03:15,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 62 [2023-01-28 05:03:15,404 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 05:03:15,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 309 treesize of output 277 [2023-01-28 05:03:15,419 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 05:03:15,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 117 [2023-01-28 05:03:15,437 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 05:03:15,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 93 [2023-01-28 05:03:15,470 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:03:15,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 96 [2023-01-28 05:03:15,530 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 05:03:15,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 250 treesize of output 253 [2023-01-28 05:03:15,588 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 05:03:15,589 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 217 treesize of output 203 [2023-01-28 05:03:15,643 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 05:03:15,644 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 142 treesize of output 153 [2023-01-28 05:03:17,109 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-01-28 05:03:17,109 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 2 case distinctions, treesize of input 151 treesize of output 1 [2023-01-28 05:03:17,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:03:17,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707902039] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:03:17,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:03:17,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2023-01-28 05:03:17,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798507349] [2023-01-28 05:03:17,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:03:17,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 05:03:17,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:03:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 05:03:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1343, Unknown=5, NotChecked=0, Total=1560 [2023-01-28 05:03:17,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 05:03:17,357 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 697 places, 2008 transitions, 60364 flow. Second operand has 40 states, 40 states have (on average 69.475) internal successors, (2779), 40 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:03:17,357 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:03:17,357 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 05:03:17,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:03:43,107 WARN L222 SmtUtils]: Spent 25.38s on a formula simplification. DAG size of input: 107 DAG size of output: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:03:45,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:03:47,368 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:03:49,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:03:53,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:04:19,727 WARN L222 SmtUtils]: Spent 26.13s on a formula simplification. DAG size of input: 140 DAG size of output: 122 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:04:22,657 WARN L539 Checker$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 05:04:46,357 WARN L222 SmtUtils]: Spent 23.29s on a formula simplification. DAG size of input: 119 DAG size of output: 105 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:04:57,454 WARN L222 SmtUtils]: Spent 10.98s on a formula simplification. DAG size of input: 158 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:05:00,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:05:07,647 INFO L130 PetriNetUnfolder]: 4808/9272 cut-off events. [2023-01-28 05:05:07,647 INFO L131 PetriNetUnfolder]: For 373487/373487 co-relation queries the response was YES. [2023-01-28 05:05:07,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118682 conditions, 9272 events. 4808/9272 cut-off events. For 373487/373487 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 76269 event pairs, 1162 based on Foata normal form. 5/9277 useless extension candidates. Maximal degree in co-relation 118459. Up to 5922 conditions per place. [2023-01-28 05:05:07,793 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1933 selfloop transitions, 186 changer transitions 34/2153 dead transitions. [2023-01-28 05:05:07,794 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 720 places, 2153 transitions, 67729 flow [2023-01-28 05:05:07,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 05:05:07,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 05:05:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2107 transitions. [2023-01-28 05:05:07,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26810026720956864 [2023-01-28 05:05:07,796 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2107 transitions. [2023-01-28 05:05:07,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2107 transitions. [2023-01-28 05:05:07,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:05:07,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2107 transitions. [2023-01-28 05:05:07,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 72.65517241379311) internal successors, (2107), 29 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:05:07,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:05:07,801 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:05:07,801 INFO L175 Difference]: Start difference. First operand has 697 places, 2008 transitions, 60364 flow. Second operand 29 states and 2107 transitions. [2023-01-28 05:05:07,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 720 places, 2153 transitions, 67729 flow [2023-01-28 05:05:13,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 2153 transitions, 66721 flow, removed 110 selfloop flow, removed 27 redundant places. [2023-01-28 05:05:13,210 INFO L231 Difference]: Finished difference. Result has 702 places, 2065 transitions, 61730 flow [2023-01-28 05:05:13,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=59385, PETRI_DIFFERENCE_MINUEND_PLACES=665, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2007, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=61730, PETRI_PLACES=702, PETRI_TRANSITIONS=2065} [2023-01-28 05:05:13,211 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 681 predicate places. [2023-01-28 05:05:13,211 INFO L495 AbstractCegarLoop]: Abstraction has has 702 places, 2065 transitions, 61730 flow [2023-01-28 05:05:13,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 69.475) internal successors, (2779), 40 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:05:13,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:05:13,212 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 05:05:13,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-28 05:05:13,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-01-28 05:05:13,412 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:05:13,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:05:13,413 INFO L85 PathProgramCache]: Analyzing trace with hash -788549963, now seen corresponding path program 37 times [2023-01-28 05:05:13,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:05:13,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161578884] [2023-01-28 05:05:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:05:13,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:05:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:05:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:05:14,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:05:14,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161578884] [2023-01-28 05:05:14,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161578884] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:05:14,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898611947] [2023-01-28 05:05:14,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:05:14,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:05:14,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:05:14,447 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:05:14,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-28 05:05:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:05:14,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 91 conjunts are in the unsatisfiable core [2023-01-28 05:05:14,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:05:14,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:05:14,993 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 16 treesize of output 18 [2023-01-28 05:05:15,409 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:05:15,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:05:15,410 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:05:15,414 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:05:15,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 18 [2023-01-28 05:05:15,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:05:15,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:05:16,121 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:05:16,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 141 [2023-01-28 05:05:16,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:05:16,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 99 [2023-01-28 05:05:16,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2023-01-28 05:05:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:05:17,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898611947] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:05:17,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:05:17,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 41 [2023-01-28 05:05:17,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380410628] [2023-01-28 05:05:17,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:05:17,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 05:05:17,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:05:17,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 05:05:17,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1602, Unknown=3, NotChecked=0, Total=1806 [2023-01-28 05:05:17,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 05:05:17,019 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 702 places, 2065 transitions, 61730 flow. Second operand has 43 states, 43 states have (on average 72.44186046511628) internal successors, (3115), 43 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:05:17,019 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:05:17,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 05:05:17,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:05:27,784 WARN L222 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 71 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:05:40,739 WARN L222 SmtUtils]: Spent 10.44s on a formula simplification. DAG size of input: 76 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:05:42,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:05:50,278 WARN L222 SmtUtils]: Spent 6.70s on a formula simplification. DAG size of input: 107 DAG size of output: 105 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 05:06:00,287 INFO L130 PetriNetUnfolder]: 4997/9598 cut-off events. [2023-01-28 05:06:00,287 INFO L131 PetriNetUnfolder]: For 374609/374609 co-relation queries the response was YES. [2023-01-28 05:06:00,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121839 conditions, 9598 events. 4997/9598 cut-off events. For 374609/374609 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 78581 event pairs, 200 based on Foata normal form. 3/9600 useless extension candidates. Maximal degree in co-relation 121610. Up to 3043 conditions per place. [2023-01-28 05:06:00,453 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1214 selfloop transitions, 1074 changer transitions 13/2301 dead transitions. [2023-01-28 05:06:00,453 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 2301 transitions, 70672 flow [2023-01-28 05:06:00,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 05:06:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 05:06:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3352 transitions. [2023-01-28 05:06:00,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2811137202281114 [2023-01-28 05:06:00,457 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3352 transitions. [2023-01-28 05:06:00,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3352 transitions. [2023-01-28 05:06:00,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:06:00,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3352 transitions. [2023-01-28 05:06:00,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 76.18181818181819) internal successors, (3352), 44 states have internal predecessors, (3352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:00,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 271.0) internal successors, (12195), 45 states have internal predecessors, (12195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:00,467 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 271.0) internal successors, (12195), 45 states have internal predecessors, (12195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:00,467 INFO L175 Difference]: Start difference. First operand has 702 places, 2065 transitions, 61730 flow. Second operand 44 states and 3352 transitions. [2023-01-28 05:06:00,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 2301 transitions, 70672 flow [2023-01-28 05:06:06,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 722 places, 2301 transitions, 70363 flow, removed 112 selfloop flow, removed 19 redundant places. [2023-01-28 05:06:06,431 INFO L231 Difference]: Finished difference. Result has 733 places, 2169 transitions, 67031 flow [2023-01-28 05:06:06,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=61429, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=981, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=67031, PETRI_PLACES=733, PETRI_TRANSITIONS=2169} [2023-01-28 05:06:06,433 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 712 predicate places. [2023-01-28 05:06:06,433 INFO L495 AbstractCegarLoop]: Abstraction has has 733 places, 2169 transitions, 67031 flow [2023-01-28 05:06:06,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 72.44186046511628) internal successors, (3115), 43 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:06,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:06:06,433 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 05:06:06,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-28 05:06:06,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:06,635 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:06:06,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:06:06,635 INFO L85 PathProgramCache]: Analyzing trace with hash -967074237, now seen corresponding path program 38 times [2023-01-28 05:06:06,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:06:06,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691532832] [2023-01-28 05:06:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:06:06,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:06:06,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:06:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:07,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:06:07,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691532832] [2023-01-28 05:06:07,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691532832] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:06:07,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69475908] [2023-01-28 05:06:07,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:06:07,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:07,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:06:07,742 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:06:07,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-28 05:06:07,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:06:07,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:06:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 05:06:07,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:06:08,002 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 05:06:08,045 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 05:06:08,109 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 05:06:08,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:06:08,363 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 27 treesize of output 27 [2023-01-28 05:06:08,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:06:08,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-01-28 05:06:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:08,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:06:09,263 WARN L839 $PredicateComparison]: unable to prove that (or (and (forall ((v_ArrVal_1716 (Array Int Int))) (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1716) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) c_~N~0)) (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) (mod (+ (* c_~C~0 2) c_~x~0) 4294967296))) (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1) c_~N~0) (<= c_~N~0 |c_thread1Thread1of1ForFork0_~i~0#1|) (< c_~n~0 1) (< c_~n~0 (+ 2 c_~q_back~0))) is different from false [2023-01-28 05:06:09,888 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:06:09,889 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 2 case distinctions, treesize of input 146 treesize of output 91 [2023-01-28 05:06:09,910 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:06:09,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 288 treesize of output 273 [2023-01-28 05:06:09,935 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:06:09,936 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 98 [2023-01-28 05:06:10,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:06:10,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 20 [2023-01-28 05:06:10,227 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-01-28 05:06:10,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 146 treesize of output 1 [2023-01-28 05:06:10,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:06:10,240 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 2 case distinctions, treesize of input 72 treesize of output 57 [2023-01-28 05:06:10,250 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:06:10,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 50 [2023-01-28 05:06:10,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:06:10,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 37 [2023-01-28 05:06:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-01-28 05:06:10,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69475908] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:06:10,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:06:10,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-01-28 05:06:10,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100597415] [2023-01-28 05:06:10,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:06:10,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 05:06:10,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:06:10,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 05:06:10,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1552, Unknown=11, NotChecked=82, Total=1892 [2023-01-28 05:06:10,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 05:06:10,480 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 733 places, 2169 transitions, 67031 flow. Second operand has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:10,480 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:06:10,480 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 05:06:10,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:06:18,778 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse19 (* c_~q_front~0 4))) (let ((.cse17 (+ .cse19 c_~q~0.offset)) (.cse16 (+ .cse19 c_~q~0.offset 4))) (let ((.cse7 (forall ((v_ArrVal_1716 (Array Int Int))) (= (let ((.cse18 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1716) c_~q~0.base))) (+ (select .cse18 .cse17) (select .cse18 .cse16))) c_~N~0))) (.cse14 (* 4 c_~q_back~0)) (.cse13 (select |c_#memory_int| c_~q~0.base)) (.cse12 (mod (+ c_~C~0 c_~x~0) 4294967296))) (let ((.cse0 (+ c_~C~0 c_~y~0)) (.cse5 (<= c_~n~0 c_~q_back~0)) (.cse1 (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) .cse12)) (.cse2 (select .cse13 .cse17)) (.cse3 (select .cse13 .cse16)) (.cse6 (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0)) (.cse8 (not (= (select .cse13 (+ c_~q~0.offset .cse14)) 1))) (.cse9 (and (forall ((~C~0 Int)) (let ((.cse15 (* 3 ~C~0))) (= (mod (+ c_~x~0 .cse15) 4294967296) (mod (+ c_~y~0 .cse15) 4294967296)))) .cse7)) (.cse10 (not (= (select .cse13 (+ c_~q~0.offset .cse14 4)) 1))) (.cse4 (< c_~q_back~0 0)) (.cse11 (< c_~n~0 (+ 3 c_~q_back~0)))) (and (<= c_~N~0 c_~s~0) (<= .cse0 c_~x~0) (or (and .cse1 (= (+ c_~s~0 .cse2 .cse3) c_~N~0)) .cse4 .cse5 .cse6) (<= c_~x~0 .cse0) (or (and .cse1 .cse7) .cse4 .cse5 .cse6) (= c_~s~0 c_~N~0) (or .cse8 (< 2 c_~N~0) .cse9 .cse10 .cse4 (<= c_~N~0 1) .cse11) (<= c_~s~0 c_~N~0) (or (and (= (+ c_~s~0 .cse2) c_~N~0) (= (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296) .cse12)) .cse4 .cse5 .cse6) (or .cse4 .cse5 (and .cse1 (= c_~N~0 (+ .cse2 .cse3))) .cse6) (or .cse8 .cse9 (<= c_~N~0 (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1)) .cse10 .cse4 .cse11 (< (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|) c_~N~0)) (= c_~q~0.offset 0) (= (mod c_~x~0 4294967296) (mod c_~y~0 4294967296))))))) is different from false [2023-01-28 05:06:19,940 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse14 (* c_~q_front~0 4))) (let ((.cse10 (+ .cse14 c_~q~0.offset))) (let ((.cse1 (forall ((v_ArrVal_1716 (Array Int Int))) (= (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1716) c_~q~0.base))) (+ (select .cse13 .cse10) (select .cse13 (+ .cse14 c_~q~0.offset 4)))) c_~N~0))) (.cse9 (select |c_#memory_int| c_~q~0.base)) (.cse11 (* 4 c_~q_back~0))) (let ((.cse0 (mod (+ c_~C~0 c_~x~0) 4294967296)) (.cse3 (<= c_~n~0 c_~q_back~0)) (.cse4 (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0)) (.cse5 (not (= (select .cse9 (+ c_~q~0.offset .cse11)) 1))) (.cse6 (and (forall ((~C~0 Int)) (let ((.cse12 (* 3 ~C~0))) (= (mod (+ c_~x~0 .cse12) 4294967296) (mod (+ c_~y~0 .cse12) 4294967296)))) .cse1)) (.cse7 (not (= (select .cse9 (+ c_~q~0.offset .cse11 4)) 1))) (.cse2 (< c_~q_back~0 0)) (.cse8 (< c_~n~0 (+ 3 c_~q_back~0)))) (and (or (and (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) .cse0) .cse1) .cse2 .cse3 .cse4) (or .cse5 (< 2 c_~N~0) .cse6 .cse7 .cse2 (<= c_~N~0 1) .cse8) (or (and (= (+ c_~s~0 (select .cse9 .cse10)) c_~N~0) (= (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296) .cse0)) .cse2 .cse3 .cse4) (or .cse5 .cse6 (<= c_~N~0 (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1)) .cse7 .cse2 .cse8 (< (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|) c_~N~0))))))) is different from false [2023-01-28 05:06:20,779 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~C~0 c_~y~0))) (and (<= c_~N~0 c_~s~0) (<= .cse0 c_~x~0) (<= c_~x~0 .cse0) (<= c_~s~0 c_~N~0) (let ((.cse1 (select |c_#memory_int| c_~q~0.base)) (.cse2 (* 4 c_~q_back~0))) (or (not (= (select .cse1 (+ c_~q~0.offset .cse2)) 1)) (and (forall ((~C~0 Int)) (let ((.cse3 (* 3 ~C~0))) (= (mod (+ c_~x~0 .cse3) 4294967296) (mod (+ c_~y~0 .cse3) 4294967296)))) (forall ((v_ArrVal_1716 (Array Int Int))) (= (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1716) c_~q~0.base)) (.cse5 (* c_~q_front~0 4))) (+ (select .cse4 (+ .cse5 c_~q~0.offset)) (select .cse4 (+ .cse5 c_~q~0.offset 4)))) c_~N~0))) (<= c_~N~0 (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1)) (not (= (select .cse1 (+ c_~q~0.offset .cse2 4)) 1)) (< c_~q_back~0 0) (< c_~n~0 (+ 3 c_~q_back~0)) (< (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|) c_~N~0))) (= c_~q~0.offset 0))) is different from false [2023-01-28 05:06:22,843 WARN L539 Checker$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 05:06:23,438 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse18 (* c_~q_front~0 4))) (let ((.cse16 (+ .cse18 c_~q~0.offset)) (.cse4 (+ .cse18 c_~q~0.offset 4))) (let ((.cse8 (forall ((v_ArrVal_1716 (Array Int Int))) (= (let ((.cse17 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1716) c_~q~0.base))) (+ (select .cse17 .cse16) (select .cse17 .cse4))) c_~N~0))) (.cse14 (* 4 c_~q_back~0)) (.cse3 (select |c_#memory_int| c_~q~0.base)) (.cse13 (mod (+ c_~C~0 c_~x~0) 4294967296))) (let ((.cse1 (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) .cse13)) (.cse2 (select .cse3 .cse16)) (.cse6 (<= c_~n~0 c_~q_back~0)) (.cse7 (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0)) (.cse9 (not (= (select .cse3 (+ c_~q~0.offset .cse14)) 1))) (.cse10 (and (forall ((~C~0 Int)) (let ((.cse15 (* 3 ~C~0))) (= (mod (+ c_~x~0 .cse15) 4294967296) (mod (+ c_~y~0 .cse15) 4294967296)))) .cse8)) (.cse11 (not (= (select .cse3 (+ c_~q~0.offset .cse14 4)) 1))) (.cse5 (< c_~q_back~0 0)) (.cse12 (< c_~n~0 (+ 3 c_~q_back~0))) (.cse0 (mod c_~x~0 4294967296))) (and (= (mod (+ c_~C~0 c_~y~0) 4294967296) .cse0) (or (and .cse1 (= (+ c_~s~0 .cse2 (select .cse3 .cse4)) c_~N~0)) .cse5 .cse6 .cse7) (or (and .cse1 .cse8) .cse5 .cse6 .cse7) (= c_~s~0 c_~N~0) (or .cse9 (< 2 c_~N~0) .cse10 .cse11 .cse5 (<= c_~N~0 1) .cse12) (or (and (= (+ c_~s~0 .cse2) c_~N~0) (= (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296) .cse13)) .cse5 .cse6 .cse7) (or .cse9 .cse10 (<= c_~N~0 (+ |c_thread1Thread1of1ForFork0_~i~0#1| 1)) .cse11 .cse5 .cse12 (< (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|) c_~N~0)) (= .cse0 (mod c_~y~0 4294967296))))))) is different from false [2023-01-28 05:06:30,653 INFO L130 PetriNetUnfolder]: 4570/8967 cut-off events. [2023-01-28 05:06:30,653 INFO L131 PetriNetUnfolder]: For 380387/380387 co-relation queries the response was YES. [2023-01-28 05:06:30,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116522 conditions, 8967 events. 4570/8967 cut-off events. For 380387/380387 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 74909 event pairs, 303 based on Foata normal form. 90/9057 useless extension candidates. Maximal degree in co-relation 116285. Up to 5688 conditions per place. [2023-01-28 05:06:30,826 INFO L137 encePairwiseOnDemand]: 258/271 looper letters, 1197 selfloop transitions, 1031 changer transitions 58/2286 dead transitions. [2023-01-28 05:06:30,826 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 2286 transitions, 72119 flow [2023-01-28 05:06:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-01-28 05:06:30,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-01-28 05:06:30,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3994 transitions. [2023-01-28 05:06:30,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2679637705467964 [2023-01-28 05:06:30,831 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3994 transitions. [2023-01-28 05:06:30,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3994 transitions. [2023-01-28 05:06:30,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:06:30,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3994 transitions. [2023-01-28 05:06:30,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 72.61818181818182) internal successors, (3994), 55 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:30,844 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 271.0) internal successors, (15176), 56 states have internal predecessors, (15176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:30,845 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 271.0) internal successors, (15176), 56 states have internal predecessors, (15176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:30,845 INFO L175 Difference]: Start difference. First operand has 733 places, 2169 transitions, 67031 flow. Second operand 55 states and 3994 transitions. [2023-01-28 05:06:30,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 2286 transitions, 72119 flow [2023-01-28 05:06:36,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 749 places, 2286 transitions, 70730 flow, removed 547 selfloop flow, removed 28 redundant places. [2023-01-28 05:06:36,806 INFO L231 Difference]: Finished difference. Result has 772 places, 2159 transitions, 66872 flow [2023-01-28 05:06:36,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=55623, PETRI_DIFFERENCE_MINUEND_PLACES=695, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=765, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1012, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=66872, PETRI_PLACES=772, PETRI_TRANSITIONS=2159} [2023-01-28 05:06:36,808 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 751 predicate places. [2023-01-28 05:06:36,808 INFO L495 AbstractCegarLoop]: Abstraction has has 772 places, 2159 transitions, 66872 flow [2023-01-28 05:06:36,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:36,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:06:36,808 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 05:06:36,814 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-28 05:06:37,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-28 05:06:37,009 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:06:37,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:06:37,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1765744395, now seen corresponding path program 39 times [2023-01-28 05:06:37,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:06:37,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035446803] [2023-01-28 05:06:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:06:37,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:06:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:06:38,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:38,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:06:38,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035446803] [2023-01-28 05:06:38,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035446803] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:06:38,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303354992] [2023-01-28 05:06:38,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:06:38,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:38,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:06:38,411 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:06:38,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-28 05:06:38,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 05:06:38,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:06:38,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 71 conjunts are in the unsatisfiable core [2023-01-28 05:06:38,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:06:39,152 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:06:39,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 7 [2023-01-28 05:06:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:06:41,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:06:42,014 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:06:42,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 83 [2023-01-28 05:06:42,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:06:42,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303354992] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:06:42,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:06:42,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 32 [2023-01-28 05:06:42,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119665970] [2023-01-28 05:06:42,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:06:42,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 05:06:42,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:06:42,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 05:06:42,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=992, Unknown=1, NotChecked=0, Total=1122 [2023-01-28 05:06:42,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 05:06:42,609 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 772 places, 2159 transitions, 66872 flow. Second operand has 34 states, 34 states have (on average 69.73529411764706) internal successors, (2371), 34 states have internal predecessors, (2371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:42,609 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:06:42,610 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 05:06:42,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 05:06:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:06:42,902 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 05:06:42,905 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:06:42,906 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 05:06:42,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-01-28 05:06:43,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-28 05:06:43,108 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateComparison was comparing new predicate (quantifier-free) to 36 known predicates. [2023-01-28 05:06:43,110 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 05:06:43,110 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 05:06:43,110 INFO L445 BasicCegarLoop]: Path program histogram: [39, 5, 4, 1, 1] [2023-01-28 05:06:43,113 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 05:06:43,113 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 05:06:43,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 05:06:43 BasicIcfg [2023-01-28 05:06:43,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 05:06:43,115 INFO L158 Benchmark]: Toolchain (without parser) took 790644.30ms. Allocated memory was 339.7MB in the beginning and 5.7GB in the end (delta: 5.3GB). Free memory was 285.1MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 992.4MB. Max. memory is 16.0GB. [2023-01-28 05:06:43,115 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 05:06:43,115 INFO L158 Benchmark]: CACSL2BoogieTranslator took 283.04ms. Allocated memory is still 339.7MB. Free memory was 284.9MB in the beginning and 273.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 05:06:43,115 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.66ms. Allocated memory is still 339.7MB. Free memory was 273.3MB in the beginning and 317.5MB in the end (delta: -44.2MB). Peak memory consumption was 7.8MB. Max. memory is 16.0GB. [2023-01-28 05:06:43,116 INFO L158 Benchmark]: Boogie Preprocessor took 44.02ms. Allocated memory is still 339.7MB. Free memory was 317.5MB in the beginning and 315.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 05:06:43,116 INFO L158 Benchmark]: RCFGBuilder took 540.34ms. Allocated memory is still 339.7MB. Free memory was 315.6MB in the beginning and 291.1MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-01-28 05:06:43,116 INFO L158 Benchmark]: TraceAbstraction took 789702.96ms. Allocated memory was 339.7MB in the beginning and 5.7GB in the end (delta: 5.3GB). Free memory was 290.6MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 995.0MB. Max. memory is 16.0GB. [2023-01-28 05:06:43,116 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 283.04ms. Allocated memory is still 339.7MB. Free memory was 284.9MB in the beginning and 273.5MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 67.66ms. Allocated memory is still 339.7MB. Free memory was 273.3MB in the beginning and 317.5MB in the end (delta: -44.2MB). Peak memory consumption was 7.8MB. Max. memory is 16.0GB. * Boogie Preprocessor took 44.02ms. Allocated memory is still 339.7MB. Free memory was 317.5MB in the beginning and 315.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 540.34ms. Allocated memory is still 339.7MB. Free memory was 315.6MB in the beginning and 291.1MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 789702.96ms. Allocated memory was 339.7MB in the beginning and 5.7GB in the end (delta: 5.3GB). Free memory was 290.6MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 995.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 124 PlacesBefore, 21 PlacesAfterwards, 128 TransitionsBefore, 17 TransitionsAfterwards, 690 CoEnabledTransitionPairs, 8 FixpointIterations, 80 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 16 TrivialYvCompositions, 7 ConcurrentYvCompositions, 8 ChoiceCompositions, 133 TotalNumberOfCompositions, 839 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 763, independent: 739, independent conditional: 0, independent unconditional: 739, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 407, independent: 397, independent conditional: 0, independent unconditional: 397, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 763, independent: 342, independent conditional: 0, independent unconditional: 342, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 407, unknown conditional: 0, unknown unconditional: 407] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 36 known predicates. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 36 known predicates. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateComparison was comparing new predicate (quantifier-free) to 36 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 152 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: 789.6s, OverallIterations: 50, TraceHistogramMax: 4, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.0s, AutomataDifference: 538.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 241 mSolverCounterUnknown, 6328 SdHoareTripleChecker+Valid, 96.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6328 mSDsluCounter, 594 SdHoareTripleChecker+Invalid, 92.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2444 IncrementalHoareTripleChecker+Unchecked, 547 mSDsCounter, 2013 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45429 IncrementalHoareTripleChecker+Invalid, 50127 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2013 mSolverCounterUnsat, 47 mSDtfsCounter, 45429 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3007 GetRequests, 809 SyntacticMatches, 19 SemanticMatches, 2178 ConstructedPredicates, 12 IntricatePredicates, 0 DeprecatedPredicates, 25779 ImplicationChecksByTransitivity, 339.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67031occurred in iteration=48, InterpolantAutomatonStates: 1281, 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: 0.6s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 229.0s InterpolantComputationTime, 1818 NumberOfCodeBlocks, 1812 NumberOfCodeBlocksAsserted, 139 NumberOfCheckSat, 2544 ConstructedInterpolants, 335 QuantifiedInterpolants, 69903 SizeOfPredicates, 879 NumberOfNonLiveVariables, 10815 ConjunctsInSsa, 2661 ConjunctsInUnsatCore, 138 InterpolantComputations, 7 PerfectInterpolantSequences, 218/1209 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