/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-array-sum-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 04:26:23,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 04:26:23,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 04:26:23,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 04:26:23,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 04:26:23,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 04:26:23,863 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 04:26:23,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 04:26:23,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 04:26:23,873 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 04:26:23,874 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 04:26:23,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 04:26:23,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 04:26:23,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 04:26:23,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 04:26:23,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 04:26:23,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 04:26:23,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 04:26:23,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 04:26:23,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 04:26:23,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 04:26:23,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 04:26:23,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 04:26:23,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 04:26:23,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 04:26:23,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 04:26:23,897 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 04:26:23,898 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 04:26:23,899 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 04:26:23,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 04:26:23,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 04:26:23,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 04:26:23,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 04:26:23,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 04:26:23,902 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 04:26:23,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 04:26:23,903 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 04:26:23,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 04:26:23,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 04:26:23,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 04:26:23,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 04:26:23,906 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 04:26:23,932 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 04:26:23,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 04:26:23,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 04:26:23,933 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 04:26:23,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 04:26:23,935 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 04:26:23,935 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 04:26:23,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 04:26:23,935 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 04:26:23,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 04:26:23,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 04:26:23,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 04:26:23,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 04:26:23,936 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 04:26:23,936 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 04:26:23,936 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 04:26:23,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 04:26:23,936 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 04:26:23,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 04:26:23,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 04:26:23,936 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 04:26:23,936 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 04:26:23,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 04:26:23,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:26:23,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 04:26:23,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 04:26:23,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 04:26:23,937 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 04:26:23,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 04:26:23,938 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 04:26:23,938 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 04:26:23,938 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 04:26:24,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 04:26:24,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 04:26:24,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 04:26:24,177 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 04:26:24,177 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 04:26:24,178 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-01-28 04:26:25,389 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 04:26:25,558 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 04:26:25,559 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-01-28 04:26:25,563 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac80c331/a7da114a7c7541c98de9707b6e47ab6f/FLAG46c032b01 [2023-01-28 04:26:25,574 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7ac80c331/a7da114a7c7541c98de9707b6e47ab6f [2023-01-28 04:26:25,576 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 04:26:25,577 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 04:26:25,578 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 04:26:25,578 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 04:26:25,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 04:26:25,581 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd8d0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25, skipping insertion in model container [2023-01-28 04:26:25,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 04:26:25,602 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 04:26:25,726 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-array-sum-alt2.wvr.c[2525,2538] [2023-01-28 04:26:25,735 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:26:25,743 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 04:26:25,760 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-array-sum-alt2.wvr.c[2525,2538] [2023-01-28 04:26:25,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 04:26:25,771 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:26:25,771 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 04:26:25,777 INFO L208 MainTranslator]: Completed translation [2023-01-28 04:26:25,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25 WrapperNode [2023-01-28 04:26:25,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 04:26:25,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 04:26:25,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 04:26:25,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 04:26:25,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,791 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,813 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 194 [2023-01-28 04:26:25,813 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 04:26:25,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 04:26:25,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 04:26:25,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 04:26:25,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,830 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,835 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 04:26:25,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 04:26:25,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 04:26:25,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 04:26:25,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (1/1) ... [2023-01-28 04:26:25,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 04:26:25,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:25,875 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 04:26:25,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 04:26:25,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 04:26:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 04:26:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 04:26:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 04:26:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 04:26:25,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 04:26:25,905 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 04:26:25,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 04:26:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 04:26:25,906 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 04:26:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 04:26:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 04:26:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 04:26:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 04:26:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 04:26:25,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 04:26:25,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 04:26:25,908 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 04:26:25,993 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 04:26:25,995 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 04:26:26,257 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 04:26:26,480 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 04:26:26,481 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-01-28 04:26:26,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:26:26 BoogieIcfgContainer [2023-01-28 04:26:26,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 04:26:26,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 04:26:26,486 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 04:26:26,488 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 04:26:26,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 04:26:25" (1/3) ... [2023-01-28 04:26:26,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae10f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:26:26, skipping insertion in model container [2023-01-28 04:26:26,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 04:26:25" (2/3) ... [2023-01-28 04:26:26,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae10f8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 04:26:26, skipping insertion in model container [2023-01-28 04:26:26,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 04:26:26" (3/3) ... [2023-01-28 04:26:26,491 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2023-01-28 04:26:26,505 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 04:26:26,506 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 04:26:26,506 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 04:26:26,592 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 04:26:26,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 144 transitions, 312 flow [2023-01-28 04:26:26,691 INFO L130 PetriNetUnfolder]: 12/141 cut-off events. [2023-01-28 04:26:26,691 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 04:26:26,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 141 events. 12/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-01-28 04:26:26,697 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 144 transitions, 312 flow [2023-01-28 04:26:26,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 131 transitions, 280 flow [2023-01-28 04:26:26,704 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 04:26:26,711 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 131 transitions, 280 flow [2023-01-28 04:26:26,713 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 131 transitions, 280 flow [2023-01-28 04:26:26,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 280 flow [2023-01-28 04:26:26,747 INFO L130 PetriNetUnfolder]: 12/131 cut-off events. [2023-01-28 04:26:26,747 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 04:26:26,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 12/131 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-01-28 04:26:26,749 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-01-28 04:26:30,725 INFO L134 LiptonReduction]: Checked pairs total: 1489 [2023-01-28 04:26:30,725 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-01-28 04:26:30,737 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 04:26:30,742 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;@79e73a86, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 04:26:30,742 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 04:26:30,748 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-01-28 04:26:30,748 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 04:26:30,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:30,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:30,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:30,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:30,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1718329889, now seen corresponding path program 1 times [2023-01-28 04:26:30,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:30,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781624921] [2023-01-28 04:26:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:30,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:31,140 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 04:26:31,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:31,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781624921] [2023-01-28 04:26:31,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781624921] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:26:31,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:26:31,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 04:26:31,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944700993] [2023-01-28 04:26:31,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:26:31,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 04:26:31,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 04:26:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 04:26:31,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 268 [2023-01-28 04:26:31,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:31,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:31,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 268 [2023-01-28 04:26:31,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:31,332 INFO L130 PetriNetUnfolder]: 360/508 cut-off events. [2023-01-28 04:26:31,332 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-01-28 04:26:31,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1608 event pairs, 39 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-01-28 04:26:31,340 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2023-01-28 04:26:31,341 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2023-01-28 04:26:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 04:26:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 04:26:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 407 transitions. [2023-01-28 04:26:31,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5062189054726368 [2023-01-28 04:26:31,360 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 407 transitions. [2023-01-28 04:26:31,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 407 transitions. [2023-01-28 04:26:31,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:31,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 407 transitions. [2023-01-28 04:26:31,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:31,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:31,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:31,384 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 407 transitions. [2023-01-28 04:26:31,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2023-01-28 04:26:31,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 04:26:31,389 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-01-28 04:26:31,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-01-28 04:26:31,397 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-01-28 04:26:31,398 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-01-28 04:26:31,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:31,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:31,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:31,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 04:26:31,399 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:31,400 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:31,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1448534594, now seen corresponding path program 1 times [2023-01-28 04:26:31,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:31,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12937396] [2023-01-28 04:26:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:31,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:31,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:31,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:31,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12937396] [2023-01-28 04:26:31,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12937396] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:26:31,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:26:31,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 04:26:31,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948050410] [2023-01-28 04:26:31,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:26:31,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:26:31,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:31,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:26:31,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:26:31,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-01-28 04:26:31,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:31,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:31,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-01-28 04:26:31,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:31,726 INFO L130 PetriNetUnfolder]: 621/928 cut-off events. [2023-01-28 04:26:31,726 INFO L131 PetriNetUnfolder]: For 261/264 co-relation queries the response was YES. [2023-01-28 04:26:31,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 928 events. 621/928 cut-off events. For 261/264 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3958 event pairs, 194 based on Foata normal form. 34/957 useless extension candidates. Maximal degree in co-relation 487. Up to 484 conditions per place. [2023-01-28 04:26:31,732 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 54 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-01-28 04:26:31,732 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 292 flow [2023-01-28 04:26:31,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:26:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:26:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 572 transitions. [2023-01-28 04:26:31,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42686567164179107 [2023-01-28 04:26:31,734 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 572 transitions. [2023-01-28 04:26:31,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 572 transitions. [2023-01-28 04:26:31,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:31,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 572 transitions. [2023-01-28 04:26:31,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:31,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:31,740 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:31,740 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 572 transitions. [2023-01-28 04:26:31,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 292 flow [2023-01-28 04:26:31,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 04:26:31,744 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 106 flow [2023-01-28 04:26:31,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-01-28 04:26:31,744 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-01-28 04:26:31,745 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 106 flow [2023-01-28 04:26:31,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:31,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:31,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:31,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 04:26:31,746 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:31,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:31,748 INFO L85 PathProgramCache]: Analyzing trace with hash 810023898, now seen corresponding path program 1 times [2023-01-28 04:26:31,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:31,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122815100] [2023-01-28 04:26:31,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:31,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:31,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:31,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122815100] [2023-01-28 04:26:31,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122815100] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:26:31,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:26:31,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 04:26:31,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806960316] [2023-01-28 04:26:31,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:26:31,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:26:31,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:26:31,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:26:31,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 268 [2023-01-28 04:26:31,917 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:31,917 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:31,917 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 268 [2023-01-28 04:26:31,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:32,068 INFO L130 PetriNetUnfolder]: 567/867 cut-off events. [2023-01-28 04:26:32,069 INFO L131 PetriNetUnfolder]: For 369/405 co-relation queries the response was YES. [2023-01-28 04:26:32,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 867 events. 567/867 cut-off events. For 369/405 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3523 event pairs, 260 based on Foata normal form. 70/933 useless extension candidates. Maximal degree in co-relation 1398. Up to 568 conditions per place. [2023-01-28 04:26:32,078 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 53 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-01-28 04:26:32,078 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 59 transitions, 296 flow [2023-01-28 04:26:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:26:32,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:26:32,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 548 transitions. [2023-01-28 04:26:32,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.408955223880597 [2023-01-28 04:26:32,082 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 548 transitions. [2023-01-28 04:26:32,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 548 transitions. [2023-01-28 04:26:32,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:32,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 548 transitions. [2023-01-28 04:26:32,084 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:32,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:32,088 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:32,088 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 106 flow. Second operand 5 states and 548 transitions. [2023-01-28 04:26:32,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 59 transitions, 296 flow [2023-01-28 04:26:32,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 59 transitions, 292 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 04:26:32,090 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 121 flow [2023-01-28 04:26:32,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-01-28 04:26:32,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-01-28 04:26:32,091 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 121 flow [2023-01-28 04:26:32,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:32,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:32,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:32,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 04:26:32,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:32,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:32,093 INFO L85 PathProgramCache]: Analyzing trace with hash -796054142, now seen corresponding path program 1 times [2023-01-28 04:26:32,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:32,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656399506] [2023-01-28 04:26:32,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:32,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:32,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:32,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:32,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:32,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656399506] [2023-01-28 04:26:32,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656399506] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 04:26:32,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 04:26:32,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 04:26:32,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146032081] [2023-01-28 04:26:32,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:26:32,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:26:32,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:32,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:26:32,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-28 04:26:32,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 268 [2023-01-28 04:26:32,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:32,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:32,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 268 [2023-01-28 04:26:32,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:32,396 INFO L130 PetriNetUnfolder]: 419/637 cut-off events. [2023-01-28 04:26:32,397 INFO L131 PetriNetUnfolder]: For 434/470 co-relation queries the response was YES. [2023-01-28 04:26:32,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1640 conditions, 637 events. 419/637 cut-off events. For 434/470 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2508 event pairs, 140 based on Foata normal form. 50/675 useless extension candidates. Maximal degree in co-relation 1378. Up to 371 conditions per place. [2023-01-28 04:26:32,401 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 34 selfloop transitions, 3 changer transitions 25/64 dead transitions. [2023-01-28 04:26:32,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 333 flow [2023-01-28 04:26:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 04:26:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 04:26:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 656 transitions. [2023-01-28 04:26:32,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079601990049751 [2023-01-28 04:26:32,407 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 656 transitions. [2023-01-28 04:26:32,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 656 transitions. [2023-01-28 04:26:32,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:32,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 656 transitions. [2023-01-28 04:26:32,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 109.33333333333333) internal successors, (656), 6 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:32,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:32,413 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:32,414 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 121 flow. Second operand 6 states and 656 transitions. [2023-01-28 04:26:32,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 333 flow [2023-01-28 04:26:32,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 320 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 04:26:32,418 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 102 flow [2023-01-28 04:26:32,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-01-28 04:26:32,420 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-01-28 04:26:32,420 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 102 flow [2023-01-28 04:26:32,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 103.8) internal successors, (519), 5 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:32,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:32,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:32,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 04:26:32,421 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:32,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash -862745430, now seen corresponding path program 1 times [2023-01-28 04:26:32,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:32,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307678442] [2023-01-28 04:26:32,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:32,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:32,543 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 04:26:32,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:32,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307678442] [2023-01-28 04:26:32,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307678442] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:32,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262951386] [2023-01-28 04:26:32,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:32,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:32,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:32,549 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 04:26:32,556 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 04:26:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:32,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:26:32,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:32,801 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 04:26:32,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:32,858 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 04:26:32,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262951386] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:26:32,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:26:32,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 04:26:32,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447567826] [2023-01-28 04:26:32,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:26:32,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 04:26:32,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:32,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 04:26:32,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:26:32,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:26:32,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 102 flow. Second operand has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:32,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:32,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:26:32,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:33,145 INFO L130 PetriNetUnfolder]: 544/799 cut-off events. [2023-01-28 04:26:33,145 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-01-28 04:26:33,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 799 events. 544/799 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3029 event pairs, 139 based on Foata normal form. 16/812 useless extension candidates. Maximal degree in co-relation 2121. Up to 410 conditions per place. [2023-01-28 04:26:33,151 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 58 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2023-01-28 04:26:33,151 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 372 flow [2023-01-28 04:26:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:26:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:26:33,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 738 transitions. [2023-01-28 04:26:33,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39339019189765456 [2023-01-28 04:26:33,153 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 738 transitions. [2023-01-28 04:26:33,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 738 transitions. [2023-01-28 04:26:33,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:33,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 738 transitions. [2023-01-28 04:26:33,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.42857142857143) internal successors, (738), 7 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:33,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:33,159 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:33,159 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 102 flow. Second operand 7 states and 738 transitions. [2023-01-28 04:26:33,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 372 flow [2023-01-28 04:26:33,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 68 transitions, 337 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-01-28 04:26:33,162 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 142 flow [2023-01-28 04:26:33,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=142, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-01-28 04:26:33,163 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-01-28 04:26:33,163 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 142 flow [2023-01-28 04:26:33,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 100.0) internal successors, (1300), 13 states have internal predecessors, (1300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:33,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:33,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:33,173 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 04:26:33,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:33,371 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:33,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:33,372 INFO L85 PathProgramCache]: Analyzing trace with hash -733147742, now seen corresponding path program 2 times [2023-01-28 04:26:33,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:33,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502912768] [2023-01-28 04:26:33,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:33,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:33,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:33,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502912768] [2023-01-28 04:26:33,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502912768] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:33,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060677806] [2023-01-28 04:26:33,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:26:33,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:33,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:33,529 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 04:26:33,547 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 04:26:33,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:26:33,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:26:33,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:26:33,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:33,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:33,794 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 04:26:33,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060677806] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:33,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:26:33,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-01-28 04:26:33,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792580869] [2023-01-28 04:26:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:26:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 04:26:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:33,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 04:26:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-01-28 04:26:33,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:26:33,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:33,799 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:33,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:26:33,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:34,004 INFO L130 PetriNetUnfolder]: 736/1083 cut-off events. [2023-01-28 04:26:34,004 INFO L131 PetriNetUnfolder]: For 1058/1058 co-relation queries the response was YES. [2023-01-28 04:26:34,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3402 conditions, 1083 events. 736/1083 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4396 event pairs, 221 based on Foata normal form. 12/1092 useless extension candidates. Maximal degree in co-relation 3380. Up to 648 conditions per place. [2023-01-28 04:26:34,010 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 60 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2023-01-28 04:26:34,010 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 73 transitions, 449 flow [2023-01-28 04:26:34,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:26:34,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:26:34,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 734 transitions. [2023-01-28 04:26:34,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39125799573560766 [2023-01-28 04:26:34,012 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 734 transitions. [2023-01-28 04:26:34,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 734 transitions. [2023-01-28 04:26:34,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:34,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 734 transitions. [2023-01-28 04:26:34,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 104.85714285714286) internal successors, (734), 7 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:34,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:34,016 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:34,016 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 142 flow. Second operand 7 states and 734 transitions. [2023-01-28 04:26:34,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 73 transitions, 449 flow [2023-01-28 04:26:34,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 414 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-01-28 04:26:34,019 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 200 flow [2023-01-28 04:26:34,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-01-28 04:26:34,020 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-01-28 04:26:34,020 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 200 flow [2023-01-28 04:26:34,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:34,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:34,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:34,027 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 04:26:34,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-28 04:26:34,227 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:34,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:34,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1999057912, now seen corresponding path program 3 times [2023-01-28 04:26:34,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:34,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902792772] [2023-01-28 04:26:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:34,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:34,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:34,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902792772] [2023-01-28 04:26:34,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902792772] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:34,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081177605] [2023-01-28 04:26:34,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:26:34,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:34,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:34,324 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 04:26:34,326 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 04:26:34,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:26:34,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:26:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:26:34,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:34,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:34,576 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 04:26:34,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081177605] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:34,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:26:34,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-01-28 04:26:34,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680374728] [2023-01-28 04:26:34,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:26:34,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 04:26:34,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:34,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 04:26:34,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-01-28 04:26:34,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:26:34,579 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:34,580 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:34,580 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:26:34,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:34,824 INFO L130 PetriNetUnfolder]: 840/1246 cut-off events. [2023-01-28 04:26:34,824 INFO L131 PetriNetUnfolder]: For 2142/2142 co-relation queries the response was YES. [2023-01-28 04:26:34,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4494 conditions, 1246 events. 840/1246 cut-off events. For 2142/2142 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5337 event pairs, 211 based on Foata normal form. 16/1259 useless extension candidates. Maximal degree in co-relation 4469. Up to 612 conditions per place. [2023-01-28 04:26:34,832 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 62 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2023-01-28 04:26:34,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 561 flow [2023-01-28 04:26:34,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:26:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:26:34,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 741 transitions. [2023-01-28 04:26:34,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39498933901918976 [2023-01-28 04:26:34,835 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 741 transitions. [2023-01-28 04:26:34,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 741 transitions. [2023-01-28 04:26:34,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:34,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 741 transitions. [2023-01-28 04:26:34,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.85714285714286) internal successors, (741), 7 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:34,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:34,841 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:34,841 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 200 flow. Second operand 7 states and 741 transitions. [2023-01-28 04:26:34,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 561 flow [2023-01-28 04:26:34,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 520 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-01-28 04:26:34,847 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 310 flow [2023-01-28 04:26:34,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-01-28 04:26:34,848 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-01-28 04:26:34,848 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 310 flow [2023-01-28 04:26:34,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:34,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:34,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:34,860 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 04:26:35,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:35,055 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:35,055 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash -141700804, now seen corresponding path program 4 times [2023-01-28 04:26:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:35,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402713149] [2023-01-28 04:26:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:35,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:35,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:35,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:35,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402713149] [2023-01-28 04:26:35,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402713149] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:35,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107802744] [2023-01-28 04:26:35,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:26:35,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:35,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:35,161 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 04:26:35,165 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 04:26:35,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:26:35,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:26:35,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:26:35,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:35,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:35,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:35,430 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 04:26:35,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107802744] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:35,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:26:35,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-01-28 04:26:35,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571750821] [2023-01-28 04:26:35,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:26:35,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 04:26:35,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:35,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 04:26:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-01-28 04:26:35,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:26:35,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:35,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:35,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:26:35,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:35,661 INFO L130 PetriNetUnfolder]: 824/1230 cut-off events. [2023-01-28 04:26:35,661 INFO L131 PetriNetUnfolder]: For 3281/3281 co-relation queries the response was YES. [2023-01-28 04:26:35,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4829 conditions, 1230 events. 824/1230 cut-off events. For 3281/3281 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5239 event pairs, 213 based on Foata normal form. 16/1243 useless extension candidates. Maximal degree in co-relation 4801. Up to 676 conditions per place. [2023-01-28 04:26:35,669 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 58 selfloop transitions, 24 changer transitions 0/83 dead transitions. [2023-01-28 04:26:35,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 647 flow [2023-01-28 04:26:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:26:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:26:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 737 transitions. [2023-01-28 04:26:35,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2023-01-28 04:26:35,672 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 737 transitions. [2023-01-28 04:26:35,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 737 transitions. [2023-01-28 04:26:35,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:35,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 737 transitions. [2023-01-28 04:26:35,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.28571428571429) internal successors, (737), 7 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:35,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:35,676 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:35,676 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 310 flow. Second operand 7 states and 737 transitions. [2023-01-28 04:26:35,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 647 flow [2023-01-28 04:26:35,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 83 transitions, 622 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-01-28 04:26:35,683 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 449 flow [2023-01-28 04:26:35,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=449, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2023-01-28 04:26:35,684 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2023-01-28 04:26:35,684 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 449 flow [2023-01-28 04:26:35,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:35,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:35,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:35,696 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 04:26:35,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:35,891 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:35,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:35,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1944857512, now seen corresponding path program 5 times [2023-01-28 04:26:35,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:35,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999755778] [2023-01-28 04:26:35,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:35,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:35,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:35,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999755778] [2023-01-28 04:26:35,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999755778] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:35,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907471011] [2023-01-28 04:26:35,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:26:35,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:35,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:35,988 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 04:26:35,991 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 04:26:36,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:26:36,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:26:36,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:26:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:36,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:36,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:36,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907471011] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:26:36,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:26:36,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-28 04:26:36,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713504897] [2023-01-28 04:26:36,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:26:36,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 04:26:36,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:36,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 04:26:36,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-01-28 04:26:36,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 268 [2023-01-28 04:26:36,204 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 449 flow. Second operand has 14 states, 14 states have (on average 97.14285714285714) internal successors, (1360), 14 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:36,204 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:36,204 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 268 [2023-01-28 04:26:36,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:36,612 INFO L130 PetriNetUnfolder]: 850/1272 cut-off events. [2023-01-28 04:26:36,612 INFO L131 PetriNetUnfolder]: For 4742/4742 co-relation queries the response was YES. [2023-01-28 04:26:36,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 1272 events. 850/1272 cut-off events. For 4742/4742 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5108 event pairs, 36 based on Foata normal form. 14/1285 useless extension candidates. Maximal degree in co-relation 5517. Up to 522 conditions per place. [2023-01-28 04:26:36,621 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 87 selfloop transitions, 43 changer transitions 0/130 dead transitions. [2023-01-28 04:26:36,622 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 130 transitions, 1191 flow [2023-01-28 04:26:36,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 04:26:36,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 04:26:36,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1123 transitions. [2023-01-28 04:26:36,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38093622795115334 [2023-01-28 04:26:36,625 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1123 transitions. [2023-01-28 04:26:36,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1123 transitions. [2023-01-28 04:26:36,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:36,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1123 transitions. [2023-01-28 04:26:36,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 102.0909090909091) internal successors, (1123), 11 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:36,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:36,632 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:36,632 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 449 flow. Second operand 11 states and 1123 transitions. [2023-01-28 04:26:36,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 130 transitions, 1191 flow [2023-01-28 04:26:36,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 130 transitions, 1122 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-01-28 04:26:36,647 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 723 flow [2023-01-28 04:26:36,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=723, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-01-28 04:26:36,648 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2023-01-28 04:26:36,648 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 723 flow [2023-01-28 04:26:36,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 97.14285714285714) internal successors, (1360), 14 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:36,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:36,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:36,661 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 04:26:36,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:36,855 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:36,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:36,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1112015240, now seen corresponding path program 6 times [2023-01-28 04:26:36,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:36,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525830386] [2023-01-28 04:26:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:36,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:36,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:36,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525830386] [2023-01-28 04:26:36,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525830386] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:36,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877604668] [2023-01-28 04:26:36,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:26:36,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:36,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:36,950 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 04:26:36,969 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 04:26:37,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:26:37,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:26:37,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:26:37,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:37,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:37,210 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 04:26:37,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877604668] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:37,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:26:37,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-01-28 04:26:37,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947082081] [2023-01-28 04:26:37,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:26:37,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 04:26:37,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:37,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 04:26:37,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:26:37,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:26:37,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 723 flow. Second operand has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:37,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:37,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:26:37,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:37,431 INFO L130 PetriNetUnfolder]: 823/1215 cut-off events. [2023-01-28 04:26:37,431 INFO L131 PetriNetUnfolder]: For 5383/5383 co-relation queries the response was YES. [2023-01-28 04:26:37,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5568 conditions, 1215 events. 823/1215 cut-off events. For 5383/5383 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4731 event pairs, 206 based on Foata normal form. 14/1226 useless extension candidates. Maximal degree in co-relation 5533. Up to 682 conditions per place. [2023-01-28 04:26:37,441 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 65 selfloop transitions, 36 changer transitions 0/105 dead transitions. [2023-01-28 04:26:37,441 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 1062 flow [2023-01-28 04:26:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:26:37,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:26:37,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 735 transitions. [2023-01-28 04:26:37,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917910447761194 [2023-01-28 04:26:37,444 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 735 transitions. [2023-01-28 04:26:37,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 735 transitions. [2023-01-28 04:26:37,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:37,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 735 transitions. [2023-01-28 04:26:37,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.0) internal successors, (735), 7 states have internal predecessors, (735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:37,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:37,449 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:37,449 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 723 flow. Second operand 7 states and 735 transitions. [2023-01-28 04:26:37,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 1062 flow [2023-01-28 04:26:37,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 1019 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-01-28 04:26:37,462 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 836 flow [2023-01-28 04:26:37,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=836, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-01-28 04:26:37,463 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-01-28 04:26:37,463 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 836 flow [2023-01-28 04:26:37,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 100.0) internal successors, (700), 7 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:37,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:37,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:37,471 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 04:26:37,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:37,670 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:37,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:37,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1943059232, now seen corresponding path program 1 times [2023-01-28 04:26:37,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:37,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261158757] [2023-01-28 04:26:37,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:37,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:37,749 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 04:26:37,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:37,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261158757] [2023-01-28 04:26:37,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261158757] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:37,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734918081] [2023-01-28 04:26:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:37,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:37,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:37,751 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 04:26:37,784 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 04:26:37,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:37,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 04:26:37,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:37,892 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 04:26:37,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:37,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:37,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734918081] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:37,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 04:26:37,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-01-28 04:26:37,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94522291] [2023-01-28 04:26:37,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 04:26:37,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 04:26:37,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 04:26:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-01-28 04:26:37,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-01-28 04:26:37,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 836 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:37,924 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:37,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-01-28 04:26:37,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:38,077 INFO L130 PetriNetUnfolder]: 699/1023 cut-off events. [2023-01-28 04:26:38,077 INFO L131 PetriNetUnfolder]: For 6336/6552 co-relation queries the response was YES. [2023-01-28 04:26:38,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4939 conditions, 1023 events. 699/1023 cut-off events. For 6336/6552 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4169 event pairs, 218 based on Foata normal form. 186/1150 useless extension candidates. Maximal degree in co-relation 4901. Up to 779 conditions per place. [2023-01-28 04:26:38,089 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 81 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2023-01-28 04:26:38,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 1203 flow [2023-01-28 04:26:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 04:26:38,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 04:26:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 554 transitions. [2023-01-28 04:26:38,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134328358208955 [2023-01-28 04:26:38,092 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 554 transitions. [2023-01-28 04:26:38,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 554 transitions. [2023-01-28 04:26:38,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:38,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 554 transitions. [2023-01-28 04:26:38,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:38,101 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:38,102 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:38,102 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 836 flow. Second operand 5 states and 554 transitions. [2023-01-28 04:26:38,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 1203 flow [2023-01-28 04:26:38,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 1106 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-01-28 04:26:38,119 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 789 flow [2023-01-28 04:26:38,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=789, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2023-01-28 04:26:38,120 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-01-28 04:26:38,120 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 789 flow [2023-01-28 04:26:38,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:38,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:38,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:38,126 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 04:26:38,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:38,326 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:38,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:38,327 INFO L85 PathProgramCache]: Analyzing trace with hash 2072621387, now seen corresponding path program 1 times [2023-01-28 04:26:38,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:38,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058319009] [2023-01-28 04:26:38,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:38,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:38,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:38,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058319009] [2023-01-28 04:26:38,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058319009] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969372427] [2023-01-28 04:26:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:38,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:38,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:38,897 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 04:26:38,900 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 04:26:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-28 04:26:39,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:39,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:26:39,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:26:39,429 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:26:39,431 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:39,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 04:26:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:39,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:39,596 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:39,597 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 54 treesize of output 38 [2023-01-28 04:26:39,601 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 17 treesize of output 11 [2023-01-28 04:26:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:39,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969372427] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:26:39,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:26:39,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-01-28 04:26:39,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400885887] [2023-01-28 04:26:39,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:26:39,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 04:26:39,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 04:26:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=515, Unknown=1, NotChecked=0, Total=600 [2023-01-28 04:26:39,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 268 [2023-01-28 04:26:39,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 789 flow. Second operand has 25 states, 25 states have (on average 80.04) internal successors, (2001), 25 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:39,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:39,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 268 [2023-01-28 04:26:39,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:41,280 INFO L130 PetriNetUnfolder]: 1474/2221 cut-off events. [2023-01-28 04:26:41,280 INFO L131 PetriNetUnfolder]: For 10370/10634 co-relation queries the response was YES. [2023-01-28 04:26:41,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 2221 events. 1474/2221 cut-off events. For 10370/10634 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10388 event pairs, 91 based on Foata normal form. 222/2439 useless extension candidates. Maximal degree in co-relation 10009. Up to 1209 conditions per place. [2023-01-28 04:26:41,304 INFO L137 encePairwiseOnDemand]: 257/268 looper letters, 147 selfloop transitions, 126 changer transitions 4/283 dead transitions. [2023-01-28 04:26:41,304 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 283 transitions, 2995 flow [2023-01-28 04:26:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 04:26:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 04:26:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1401 transitions. [2023-01-28 04:26:41,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3267257462686567 [2023-01-28 04:26:41,309 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1401 transitions. [2023-01-28 04:26:41,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1401 transitions. [2023-01-28 04:26:41,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:41,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1401 transitions. [2023-01-28 04:26:41,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 87.5625) internal successors, (1401), 16 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:41,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 268.0) internal successors, (4556), 17 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:41,319 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 268.0) internal successors, (4556), 17 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:41,319 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 789 flow. Second operand 16 states and 1401 transitions. [2023-01-28 04:26:41,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 283 transitions, 2995 flow [2023-01-28 04:26:41,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 283 transitions, 2957 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-01-28 04:26:41,349 INFO L231 Difference]: Finished difference. Result has 92 places, 181 transitions, 2247 flow [2023-01-28 04:26:41,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2247, PETRI_PLACES=92, PETRI_TRANSITIONS=181} [2023-01-28 04:26:41,351 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2023-01-28 04:26:41,351 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 181 transitions, 2247 flow [2023-01-28 04:26:41,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 80.04) internal successors, (2001), 25 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:41,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:41,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:41,357 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 04:26:41,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 04:26:41,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:41,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:41,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1602150613, now seen corresponding path program 1 times [2023-01-28 04:26:41,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:41,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151475919] [2023-01-28 04:26:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:41,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:41,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:41,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151475919] [2023-01-28 04:26:41,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151475919] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:41,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608035547] [2023-01-28 04:26:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:41,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:41,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:41,941 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 04:26:41,964 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 04:26:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:42,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-28 04:26:42,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:42,089 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 04:26:42,125 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 04:26:42,158 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 04:26:42,184 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 04:26:42,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:26:42,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:42,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:42,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608035547] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:26:42,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:26:42,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 13 [2023-01-28 04:26:42,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956970853] [2023-01-28 04:26:42,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:26:42,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:26:42,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:42,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:26:42,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:26:42,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-28 04:26:42,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 181 transitions, 2247 flow. Second operand has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:42,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:42,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-28 04:26:42,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:43,049 INFO L130 PetriNetUnfolder]: 2293/3450 cut-off events. [2023-01-28 04:26:43,049 INFO L131 PetriNetUnfolder]: For 26439/26802 co-relation queries the response was YES. [2023-01-28 04:26:43,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19287 conditions, 3450 events. 2293/3450 cut-off events. For 26439/26802 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17516 event pairs, 188 based on Foata normal form. 293/3669 useless extension candidates. Maximal degree in co-relation 18044. Up to 2277 conditions per place. [2023-01-28 04:26:43,074 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 165 selfloop transitions, 144 changer transitions 1/318 dead transitions. [2023-01-28 04:26:43,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 318 transitions, 4320 flow [2023-01-28 04:26:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:26:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:26:43,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 762 transitions. [2023-01-28 04:26:43,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.355410447761194 [2023-01-28 04:26:43,077 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 762 transitions. [2023-01-28 04:26:43,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 762 transitions. [2023-01-28 04:26:43,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:43,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 762 transitions. [2023-01-28 04:26:43,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:43,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:43,082 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:43,082 INFO L175 Difference]: Start difference. First operand has 92 places, 181 transitions, 2247 flow. Second operand 8 states and 762 transitions. [2023-01-28 04:26:43,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 318 transitions, 4320 flow [2023-01-28 04:26:43,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 318 transitions, 4124 flow, removed 97 selfloop flow, removed 1 redundant places. [2023-01-28 04:26:43,147 INFO L231 Difference]: Finished difference. Result has 102 places, 254 transitions, 3488 flow [2023-01-28 04:26:43,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3488, PETRI_PLACES=102, PETRI_TRANSITIONS=254} [2023-01-28 04:26:43,148 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2023-01-28 04:26:43,148 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 254 transitions, 3488 flow [2023-01-28 04:26:43,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:43,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:43,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:43,157 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 04:26:43,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 04:26:43,355 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:43,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:43,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1383538529, now seen corresponding path program 2 times [2023-01-28 04:26:43,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:43,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825513101] [2023-01-28 04:26:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:43,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:43,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:43,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:43,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825513101] [2023-01-28 04:26:43,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825513101] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:43,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294445930] [2023-01-28 04:26:43,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:26:43,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:43,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:43,675 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 04:26:43,684 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 04:26:43,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:26:43,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:26:43,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-28 04:26:43,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:43,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:26:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:43,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:43,958 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:43,959 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 23 treesize of output 16 [2023-01-28 04:26:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:43,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294445930] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:26:43,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:26:43,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 04:26:43,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625906663] [2023-01-28 04:26:43,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:26:43,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 04:26:43,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:43,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 04:26:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 04:26:43,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 268 [2023-01-28 04:26:43,995 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 254 transitions, 3488 flow. Second operand has 11 states, 11 states have (on average 102.45454545454545) internal successors, (1127), 11 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:43,995 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:43,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 268 [2023-01-28 04:26:43,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:44,820 INFO L130 PetriNetUnfolder]: 2863/4300 cut-off events. [2023-01-28 04:26:44,820 INFO L131 PetriNetUnfolder]: For 41105/41630 co-relation queries the response was YES. [2023-01-28 04:26:44,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26217 conditions, 4300 events. 2863/4300 cut-off events. For 41105/41630 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 22668 event pairs, 552 based on Foata normal form. 431/4615 useless extension candidates. Maximal degree in co-relation 24563. Up to 3447 conditions per place. [2023-01-28 04:26:44,862 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 237 selfloop transitions, 132 changer transitions 1/378 dead transitions. [2023-01-28 04:26:44,863 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 378 transitions, 5719 flow [2023-01-28 04:26:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:26:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:26:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 774 transitions. [2023-01-28 04:26:44,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125799573560768 [2023-01-28 04:26:44,866 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 774 transitions. [2023-01-28 04:26:44,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 774 transitions. [2023-01-28 04:26:44,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:44,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 774 transitions. [2023-01-28 04:26:44,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.57142857142857) internal successors, (774), 7 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:44,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:44,884 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:44,884 INFO L175 Difference]: Start difference. First operand has 102 places, 254 transitions, 3488 flow. Second operand 7 states and 774 transitions. [2023-01-28 04:26:44,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 378 transitions, 5719 flow [2023-01-28 04:26:44,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 378 transitions, 5552 flow, removed 43 selfloop flow, removed 2 redundant places. [2023-01-28 04:26:44,985 INFO L231 Difference]: Finished difference. Result has 109 places, 323 transitions, 4796 flow [2023-01-28 04:26:44,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4796, PETRI_PLACES=109, PETRI_TRANSITIONS=323} [2023-01-28 04:26:44,986 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2023-01-28 04:26:44,986 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 323 transitions, 4796 flow [2023-01-28 04:26:44,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 102.45454545454545) internal successors, (1127), 11 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:44,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:44,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:44,992 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 04:26:45,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 04:26:45,193 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:45,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash 403272333, now seen corresponding path program 3 times [2023-01-28 04:26:45,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:45,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184940843] [2023-01-28 04:26:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:45,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:45,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:45,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:45,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184940843] [2023-01-28 04:26:45,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184940843] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:45,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286039068] [2023-01-28 04:26:45,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:26:45,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:45,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:45,605 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 04:26:45,607 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 04:26:45,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:26:45,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:26:45,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 04:26:45,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:45,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:26:45,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:26:45,904 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 15 treesize of output 7 [2023-01-28 04:26:45,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:45,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:45,962 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_571 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_571) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-01-28 04:26:45,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:45,983 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 46 treesize of output 34 [2023-01-28 04:26:45,986 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 13 treesize of output 11 [2023-01-28 04:26:46,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-01-28 04:26:46,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286039068] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:26:46,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:26:46,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 04:26:46,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701328503] [2023-01-28 04:26:46,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:26:46,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:26:46,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:46,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:26:46,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=4, NotChecked=34, Total=380 [2023-01-28 04:26:46,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-01-28 04:26:46,053 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 323 transitions, 4796 flow. Second operand has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:46,053 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:46,053 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-01-28 04:26:46,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:46,997 INFO L130 PetriNetUnfolder]: 3264/4913 cut-off events. [2023-01-28 04:26:46,997 INFO L131 PetriNetUnfolder]: For 50847/51506 co-relation queries the response was YES. [2023-01-28 04:26:47,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31355 conditions, 4913 events. 3264/4913 cut-off events. For 50847/51506 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26822 event pairs, 295 based on Foata normal form. 545/5323 useless extension candidates. Maximal degree in co-relation 29641. Up to 2800 conditions per place. [2023-01-28 04:26:47,040 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 157 selfloop transitions, 253 changer transitions 1/419 dead transitions. [2023-01-28 04:26:47,040 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 419 transitions, 6615 flow [2023-01-28 04:26:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:26:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:26:47,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 754 transitions. [2023-01-28 04:26:47,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40191897654584224 [2023-01-28 04:26:47,042 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 754 transitions. [2023-01-28 04:26:47,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 754 transitions. [2023-01-28 04:26:47,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:47,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 754 transitions. [2023-01-28 04:26:47,045 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.71428571428571) internal successors, (754), 7 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:47,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:47,047 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:47,047 INFO L175 Difference]: Start difference. First operand has 109 places, 323 transitions, 4796 flow. Second operand 7 states and 754 transitions. [2023-01-28 04:26:47,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 419 transitions, 6615 flow [2023-01-28 04:26:47,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 419 transitions, 6400 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-01-28 04:26:47,200 INFO L231 Difference]: Finished difference. Result has 115 places, 361 transitions, 5880 flow [2023-01-28 04:26:47,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=4581, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5880, PETRI_PLACES=115, PETRI_TRANSITIONS=361} [2023-01-28 04:26:47,200 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2023-01-28 04:26:47,201 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 361 transitions, 5880 flow [2023-01-28 04:26:47,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:47,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:47,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:47,209 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 04:26:47,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 04:26:47,407 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:47,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash -399472957, now seen corresponding path program 4 times [2023-01-28 04:26:47,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:47,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841356566] [2023-01-28 04:26:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:47,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:47,847 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:47,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:47,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841356566] [2023-01-28 04:26:47,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841356566] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:47,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99609715] [2023-01-28 04:26:47,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:26:47,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:47,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:47,849 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 04:26:47,851 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 04:26:47,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:26:47,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:26:47,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-28 04:26:47,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:48,004 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 04:26:48,032 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 04:26:48,063 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 04:26:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:26:48,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:26:48,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:26:48,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:48,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:48,320 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_620 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_620) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0))) is different from false [2023-01-28 04:26:48,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:48,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2023-01-28 04:26:48,417 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 634 treesize of output 594 [2023-01-28 04:26:48,427 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 124 treesize of output 116 [2023-01-28 04:26:48,430 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 116 treesize of output 112 [2023-01-28 04:26:48,435 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 56 treesize of output 54 [2023-01-28 04:26:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:48,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99609715] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:26:48,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:26:48,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2023-01-28 04:26:48,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287632998] [2023-01-28 04:26:48,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:26:48,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 04:26:48,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:48,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 04:26:48,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=390, Unknown=16, NotChecked=42, Total=552 [2023-01-28 04:26:48,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-28 04:26:48,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 361 transitions, 5880 flow. Second operand has 24 states, 24 states have (on average 86.04166666666667) internal successors, (2065), 24 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:48,508 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:48,508 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-28 04:26:48,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:48,856 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_620 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_620) c_~A~0.base) c_~A~0.offset) c_~res2~0))) (= c_~res2~0 c_~res1~0) (forall ((v_ArrVal_619 (Array Int Int)) (v_ArrVal_620 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_619))) (= (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_620) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ c_~res1~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)))))) is different from false [2023-01-28 04:26:49,732 INFO L130 PetriNetUnfolder]: 3739/5617 cut-off events. [2023-01-28 04:26:49,732 INFO L131 PetriNetUnfolder]: For 74169/74999 co-relation queries the response was YES. [2023-01-28 04:26:49,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38807 conditions, 5617 events. 3739/5617 cut-off events. For 74169/74999 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 31140 event pairs, 761 based on Foata normal form. 696/6157 useless extension candidates. Maximal degree in co-relation 36706. Up to 4456 conditions per place. [2023-01-28 04:26:49,773 INFO L137 encePairwiseOnDemand]: 250/268 looper letters, 279 selfloop transitions, 210 changer transitions 1/498 dead transitions. [2023-01-28 04:26:49,773 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 498 transitions, 8506 flow [2023-01-28 04:26:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 04:26:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 04:26:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 943 transitions. [2023-01-28 04:26:49,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35186567164179106 [2023-01-28 04:26:49,776 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 943 transitions. [2023-01-28 04:26:49,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 943 transitions. [2023-01-28 04:26:49,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:49,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 943 transitions. [2023-01-28 04:26:49,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 94.3) internal successors, (943), 10 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:49,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:49,781 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:49,782 INFO L175 Difference]: Start difference. First operand has 115 places, 361 transitions, 5880 flow. Second operand 10 states and 943 transitions. [2023-01-28 04:26:49,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 498 transitions, 8506 flow [2023-01-28 04:26:50,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 498 transitions, 8287 flow, removed 46 selfloop flow, removed 2 redundant places. [2023-01-28 04:26:50,024 INFO L231 Difference]: Finished difference. Result has 126 places, 444 transitions, 7517 flow [2023-01-28 04:26:50,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=5709, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7517, PETRI_PLACES=126, PETRI_TRANSITIONS=444} [2023-01-28 04:26:50,025 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2023-01-28 04:26:50,025 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 444 transitions, 7517 flow [2023-01-28 04:26:50,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.04166666666667) internal successors, (2065), 24 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:50,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:50,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:50,035 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 04:26:50,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 04:26:50,232 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:50,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:50,232 INFO L85 PathProgramCache]: Analyzing trace with hash 568034103, now seen corresponding path program 2 times [2023-01-28 04:26:50,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:50,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262426829] [2023-01-28 04:26:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:50,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:50,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:50,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262426829] [2023-01-28 04:26:50,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262426829] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:50,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199617219] [2023-01-28 04:26:50,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:26:50,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:50,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:50,719 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 04:26:50,721 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 04:26:50,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:26:50,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:26:50,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-28 04:26:50,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:51,080 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:26:51,082 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:51,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 04:26:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:51,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:51,122 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:51,123 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 23 treesize of output 16 [2023-01-28 04:26:51,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:26:51,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199617219] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:26:51,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:26:51,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-01-28 04:26:51,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757371561] [2023-01-28 04:26:51,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:26:51,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 04:26:51,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:51,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 04:26:51,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-01-28 04:26:51,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-28 04:26:51,331 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 444 transitions, 7517 flow. Second operand has 25 states, 25 states have (on average 81.2) internal successors, (2030), 25 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:51,331 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:51,331 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-28 04:26:51,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:52,912 INFO L130 PetriNetUnfolder]: 4359/6570 cut-off events. [2023-01-28 04:26:52,912 INFO L131 PetriNetUnfolder]: For 79032/79032 co-relation queries the response was YES. [2023-01-28 04:26:52,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48721 conditions, 6570 events. 4359/6570 cut-off events. For 79032/79032 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 36053 event pairs, 1102 based on Foata normal form. 4/6553 useless extension candidates. Maximal degree in co-relation 46599. Up to 5862 conditions per place. [2023-01-28 04:26:52,969 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 387 selfloop transitions, 160 changer transitions 2/549 dead transitions. [2023-01-28 04:26:52,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 549 transitions, 9735 flow [2023-01-28 04:26:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 04:26:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 04:26:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1308 transitions. [2023-01-28 04:26:52,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3253731343283582 [2023-01-28 04:26:52,972 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1308 transitions. [2023-01-28 04:26:52,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1308 transitions. [2023-01-28 04:26:52,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:52,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1308 transitions. [2023-01-28 04:26:52,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 87.2) internal successors, (1308), 15 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:52,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:52,979 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:52,979 INFO L175 Difference]: Start difference. First operand has 126 places, 444 transitions, 7517 flow. Second operand 15 states and 1308 transitions. [2023-01-28 04:26:52,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 549 transitions, 9735 flow [2023-01-28 04:26:53,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 549 transitions, 9488 flow, removed 51 selfloop flow, removed 4 redundant places. [2023-01-28 04:26:53,282 INFO L231 Difference]: Finished difference. Result has 142 places, 477 transitions, 8155 flow [2023-01-28 04:26:53,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=7274, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8155, PETRI_PLACES=142, PETRI_TRANSITIONS=477} [2023-01-28 04:26:53,283 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2023-01-28 04:26:53,283 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 477 transitions, 8155 flow [2023-01-28 04:26:53,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 81.2) internal successors, (2030), 25 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:53,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:53,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:53,293 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 04:26:53,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 04:26:53,490 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:53,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:53,490 INFO L85 PathProgramCache]: Analyzing trace with hash -697470791, now seen corresponding path program 3 times [2023-01-28 04:26:53,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:53,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863403742] [2023-01-28 04:26:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:53,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:54,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:54,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863403742] [2023-01-28 04:26:54,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863403742] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:54,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834158162] [2023-01-28 04:26:54,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:26:54,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:54,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:54,033 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 04:26:54,043 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 04:26:54,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 04:26:54,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:26:54,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 04:26:54,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:54,484 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:26:54,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:54,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 04:26:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:54,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:54,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:54,527 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 23 treesize of output 16 [2023-01-28 04:26:54,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:54,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834158162] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:26:54,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:26:54,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-01-28 04:26:54,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963238959] [2023-01-28 04:26:54,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:26:54,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 04:26:54,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:54,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 04:26:54,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-01-28 04:26:54,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 268 [2023-01-28 04:26:54,780 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 477 transitions, 8155 flow. Second operand has 23 states, 23 states have (on average 84.26086956521739) internal successors, (1938), 23 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:54,780 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:54,780 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 268 [2023-01-28 04:26:54,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:26:56,416 INFO L130 PetriNetUnfolder]: 4450/6752 cut-off events. [2023-01-28 04:26:56,416 INFO L131 PetriNetUnfolder]: For 83548/83892 co-relation queries the response was YES. [2023-01-28 04:26:56,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51149 conditions, 6752 events. 4450/6752 cut-off events. For 83548/83892 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38752 event pairs, 734 based on Foata normal form. 222/6894 useless extension candidates. Maximal degree in co-relation 50512. Up to 5138 conditions per place. [2023-01-28 04:26:56,489 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 332 selfloop transitions, 274 changer transitions 4/628 dead transitions. [2023-01-28 04:26:56,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 628 transitions, 11238 flow [2023-01-28 04:26:56,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 04:26:56,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 04:26:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1265 transitions. [2023-01-28 04:26:56,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3371535181236674 [2023-01-28 04:26:56,491 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1265 transitions. [2023-01-28 04:26:56,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1265 transitions. [2023-01-28 04:26:56,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:26:56,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1265 transitions. [2023-01-28 04:26:56,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 90.35714285714286) internal successors, (1265), 14 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:56,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:56,498 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:56,498 INFO L175 Difference]: Start difference. First operand has 142 places, 477 transitions, 8155 flow. Second operand 14 states and 1265 transitions. [2023-01-28 04:26:56,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 628 transitions, 11238 flow [2023-01-28 04:26:56,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 628 transitions, 10909 flow, removed 77 selfloop flow, removed 4 redundant places. [2023-01-28 04:26:56,978 INFO L231 Difference]: Finished difference. Result has 156 places, 551 transitions, 9820 flow [2023-01-28 04:26:56,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=7884, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9820, PETRI_PLACES=156, PETRI_TRANSITIONS=551} [2023-01-28 04:26:56,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 126 predicate places. [2023-01-28 04:26:56,979 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 551 transitions, 9820 flow [2023-01-28 04:26:56,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 84.26086956521739) internal successors, (1938), 23 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:56,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:26:56,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:26:56,996 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 04:26:57,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:57,180 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:26:57,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:26:57,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1676074169, now seen corresponding path program 4 times [2023-01-28 04:26:57,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:26:57,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294663855] [2023-01-28 04:26:57,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:26:57,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:26:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:26:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:57,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:26:57,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294663855] [2023-01-28 04:26:57,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294663855] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:26:57,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190913126] [2023-01-28 04:26:57,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:26:57,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:26:57,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:26:57,664 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 04:26:57,666 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 04:26:57,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:26:57,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:26:57,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 64 conjunts are in the unsatisfiable core [2023-01-28 04:26:57,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:26:57,852 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 04:26:57,901 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 04:26:57,949 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 04:26:57,987 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 04:26:58,243 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:58,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-01-28 04:26:58,311 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:58,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:26:58,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:58,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2023-01-28 04:26:58,772 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:58,772 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 398 treesize of output 382 [2023-01-28 04:26:58,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:58,790 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 182 treesize of output 174 [2023-01-28 04:26:58,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:58,803 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 166 treesize of output 142 [2023-01-28 04:26:58,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:26:58,820 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 70 treesize of output 71 [2023-01-28 04:26:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:26:59,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190913126] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:26:59,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:26:59,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 29 [2023-01-28 04:26:59,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598335841] [2023-01-28 04:26:59,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:26:59,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 04:26:59,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:26:59,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 04:26:59,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=768, Unknown=8, NotChecked=0, Total=930 [2023-01-28 04:26:59,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 268 [2023-01-28 04:26:59,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 551 transitions, 9820 flow. Second operand has 31 states, 31 states have (on average 70.90322580645162) internal successors, (2198), 31 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:26:59,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:26:59,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 268 [2023-01-28 04:26:59,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:27:02,179 INFO L130 PetriNetUnfolder]: 5346/8076 cut-off events. [2023-01-28 04:27:02,179 INFO L131 PetriNetUnfolder]: For 108616/108616 co-relation queries the response was YES. [2023-01-28 04:27:02,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63914 conditions, 8076 events. 5346/8076 cut-off events. For 108616/108616 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 46058 event pairs, 1186 based on Foata normal form. 1/8077 useless extension candidates. Maximal degree in co-relation 63242. Up to 6260 conditions per place. [2023-01-28 04:27:02,248 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 449 selfloop transitions, 385 changer transitions 3/837 dead transitions. [2023-01-28 04:27:02,248 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 837 transitions, 15440 flow [2023-01-28 04:27:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 04:27:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 04:27:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2724 transitions. [2023-01-28 04:27:02,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28233830845771146 [2023-01-28 04:27:02,253 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2724 transitions. [2023-01-28 04:27:02,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2724 transitions. [2023-01-28 04:27:02,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:27:02,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2724 transitions. [2023-01-28 04:27:02,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 75.66666666666667) internal successors, (2724), 36 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:02,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 268.0) internal successors, (9916), 37 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:02,268 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 268.0) internal successors, (9916), 37 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:02,268 INFO L175 Difference]: Start difference. First operand has 156 places, 551 transitions, 9820 flow. Second operand 36 states and 2724 transitions. [2023-01-28 04:27:02,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 837 transitions, 15440 flow [2023-01-28 04:27:02,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 837 transitions, 15317 flow, removed 45 selfloop flow, removed 4 redundant places. [2023-01-28 04:27:02,742 INFO L231 Difference]: Finished difference. Result has 200 places, 711 transitions, 13823 flow [2023-01-28 04:27:02,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=9722, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=13823, PETRI_PLACES=200, PETRI_TRANSITIONS=711} [2023-01-28 04:27:02,743 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2023-01-28 04:27:02,743 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 711 transitions, 13823 flow [2023-01-28 04:27:02,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 70.90322580645162) internal successors, (2198), 31 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:02,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:27:02,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:27:02,752 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 04:27:02,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:02,950 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:27:02,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:27:02,950 INFO L85 PathProgramCache]: Analyzing trace with hash 298877543, now seen corresponding path program 5 times [2023-01-28 04:27:02,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:27:02,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630234034] [2023-01-28 04:27:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:27:02,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:27:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:27:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:03,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:27:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630234034] [2023-01-28 04:27:03,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630234034] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:27:03,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346029400] [2023-01-28 04:27:03,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:27:03,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:03,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:27:03,329 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 04:27:03,352 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 04:27:03,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:27:03,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:27:03,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 04:27:03,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:27:03,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:27:03,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:27:03,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:27:03,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:03,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:27:03,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:27:03,755 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 54 treesize of output 38 [2023-01-28 04:27:03,758 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 17 treesize of output 11 [2023-01-28 04:27:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346029400] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:27:03,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:27:03,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 04:27:03,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072433898] [2023-01-28 04:27:03,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:27:03,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:27:03,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:27:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:27:03,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=294, Unknown=1, NotChecked=0, Total=380 [2023-01-28 04:27:03,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-01-28 04:27:03,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 711 transitions, 13823 flow. Second operand has 20 states, 20 states have (on average 97.4) internal successors, (1948), 20 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:03,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:27:03,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-01-28 04:27:03,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:27:05,455 INFO L130 PetriNetUnfolder]: 5069/7662 cut-off events. [2023-01-28 04:27:05,455 INFO L131 PetriNetUnfolder]: For 143441/144370 co-relation queries the response was YES. [2023-01-28 04:27:05,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66061 conditions, 7662 events. 5069/7662 cut-off events. For 143441/144370 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 44792 event pairs, 952 based on Foata normal form. 524/7978 useless extension candidates. Maximal degree in co-relation 65740. Up to 6134 conditions per place. [2023-01-28 04:27:05,529 INFO L137 encePairwiseOnDemand]: 261/268 looper letters, 451 selfloop transitions, 295 changer transitions 1/766 dead transitions. [2023-01-28 04:27:05,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 766 transitions, 16035 flow [2023-01-28 04:27:05,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:27:05,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:27:05,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 746 transitions. [2023-01-28 04:27:05,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976545842217484 [2023-01-28 04:27:05,531 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 746 transitions. [2023-01-28 04:27:05,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 746 transitions. [2023-01-28 04:27:05,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:27:05,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 746 transitions. [2023-01-28 04:27:05,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.57142857142857) internal successors, (746), 7 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:05,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:05,535 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:05,535 INFO L175 Difference]: Start difference. First operand has 200 places, 711 transitions, 13823 flow. Second operand 7 states and 746 transitions. [2023-01-28 04:27:05,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 766 transitions, 16035 flow [2023-01-28 04:27:06,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 766 transitions, 15685 flow, removed 157 selfloop flow, removed 5 redundant places. [2023-01-28 04:27:06,115 INFO L231 Difference]: Finished difference. Result has 202 places, 716 transitions, 14237 flow [2023-01-28 04:27:06,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=13477, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14237, PETRI_PLACES=202, PETRI_TRANSITIONS=716} [2023-01-28 04:27:06,116 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2023-01-28 04:27:06,116 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 716 transitions, 14237 flow [2023-01-28 04:27:06,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.4) internal successors, (1948), 20 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:06,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:27:06,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:27:06,122 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 04:27:06,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:06,317 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:27:06,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:27:06,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1609767657, now seen corresponding path program 6 times [2023-01-28 04:27:06,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:27:06,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837993588] [2023-01-28 04:27:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:27:06,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:27:06,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:27:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:06,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:27:06,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837993588] [2023-01-28 04:27:06,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837993588] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:27:06,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625885459] [2023-01-28 04:27:06,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:27:06,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:06,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:27:06,681 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 04:27:06,685 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 04:27:06,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:27:06,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:27:06,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 04:27:06,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:27:06,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:27:06,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:27:07,008 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 15 treesize of output 7 [2023-01-28 04:27:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:07,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:27:07,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:27:07,076 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 54 treesize of output 38 [2023-01-28 04:27:07,080 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 17 treesize of output 11 [2023-01-28 04:27:07,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:07,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625885459] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:27:07,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:27:07,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 04:27:07,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722745327] [2023-01-28 04:27:07,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:27:07,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:27:07,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:27:07,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:27:07,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=293, Unknown=1, NotChecked=0, Total=380 [2023-01-28 04:27:07,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-01-28 04:27:07,162 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 716 transitions, 14237 flow. Second operand has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:07,162 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:27:07,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-01-28 04:27:07,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:27:08,943 INFO L130 PetriNetUnfolder]: 5138/7780 cut-off events. [2023-01-28 04:27:08,943 INFO L131 PetriNetUnfolder]: For 152784/153695 co-relation queries the response was YES. [2023-01-28 04:27:08,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67746 conditions, 7780 events. 5138/7780 cut-off events. For 152784/153695 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 45883 event pairs, 989 based on Foata normal form. 545/8104 useless extension candidates. Maximal degree in co-relation 67471. Up to 6906 conditions per place. [2023-01-28 04:27:08,998 INFO L137 encePairwiseOnDemand]: 261/268 looper letters, 512 selfloop transitions, 228 changer transitions 1/760 dead transitions. [2023-01-28 04:27:08,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 760 transitions, 16294 flow [2023-01-28 04:27:08,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:27:08,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:27:09,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 741 transitions. [2023-01-28 04:27:09,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39498933901918976 [2023-01-28 04:27:09,000 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 741 transitions. [2023-01-28 04:27:09,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 741 transitions. [2023-01-28 04:27:09,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:27:09,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 741 transitions. [2023-01-28 04:27:09,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.85714285714286) internal successors, (741), 7 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:09,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:09,004 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:09,004 INFO L175 Difference]: Start difference. First operand has 202 places, 716 transitions, 14237 flow. Second operand 7 states and 741 transitions. [2023-01-28 04:27:09,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 760 transitions, 16294 flow [2023-01-28 04:27:09,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 760 transitions, 15710 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-01-28 04:27:09,602 INFO L231 Difference]: Finished difference. Result has 204 places, 721 transitions, 14255 flow [2023-01-28 04:27:09,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=13653, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=716, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14255, PETRI_PLACES=204, PETRI_TRANSITIONS=721} [2023-01-28 04:27:09,603 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2023-01-28 04:27:09,603 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 721 transitions, 14255 flow [2023-01-28 04:27:09,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:09,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:27:09,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:27:09,611 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 04:27:09,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:09,809 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:27:09,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:27:09,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1065189005, now seen corresponding path program 7 times [2023-01-28 04:27:09,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:27:09,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557198822] [2023-01-28 04:27:09,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:27:09,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:27:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:27:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:10,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:27:10,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557198822] [2023-01-28 04:27:10,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557198822] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:27:10,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079453561] [2023-01-28 04:27:10,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:27:10,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:10,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:27:10,061 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 04:27:10,064 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 04:27:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:27:10,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-28 04:27:10,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:27:10,194 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 04:27:10,230 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 04:27:10,263 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 04:27:10,285 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 04:27:10,329 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 15 treesize of output 7 [2023-01-28 04:27:10,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:27:10,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:27:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:10,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079453561] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:27:10,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:27:10,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 13 [2023-01-28 04:27:10,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163910418] [2023-01-28 04:27:10,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:27:10,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:27:10,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:27:10,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:27:10,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:27:10,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-28 04:27:10,399 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 721 transitions, 14255 flow. Second operand has 15 states, 15 states have (on average 86.86666666666666) internal successors, (1303), 15 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:10,399 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:27:10,399 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-28 04:27:10,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:27:12,040 INFO L130 PetriNetUnfolder]: 5235/7939 cut-off events. [2023-01-28 04:27:12,041 INFO L131 PetriNetUnfolder]: For 155806/156770 co-relation queries the response was YES. [2023-01-28 04:27:12,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68934 conditions, 7939 events. 5235/7939 cut-off events. For 155806/156770 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 47060 event pairs, 1042 based on Foata normal form. 559/8283 useless extension candidates. Maximal degree in co-relation 68658. Up to 6760 conditions per place. [2023-01-28 04:27:12,103 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 512 selfloop transitions, 273 changer transitions 1/805 dead transitions. [2023-01-28 04:27:12,103 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 805 transitions, 17110 flow [2023-01-28 04:27:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:27:12,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:27:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 751 transitions. [2023-01-28 04:27:12,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35027985074626866 [2023-01-28 04:27:12,105 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 751 transitions. [2023-01-28 04:27:12,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 751 transitions. [2023-01-28 04:27:12,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:27:12,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 751 transitions. [2023-01-28 04:27:12,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.875) internal successors, (751), 8 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:12,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:12,108 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:12,108 INFO L175 Difference]: Start difference. First operand has 204 places, 721 transitions, 14255 flow. Second operand 8 states and 751 transitions. [2023-01-28 04:27:12,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 805 transitions, 17110 flow [2023-01-28 04:27:12,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 805 transitions, 16559 flow, removed 32 selfloop flow, removed 6 redundant places. [2023-01-28 04:27:12,763 INFO L231 Difference]: Finished difference. Result has 208 places, 756 transitions, 15149 flow [2023-01-28 04:27:12,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=13742, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15149, PETRI_PLACES=208, PETRI_TRANSITIONS=756} [2023-01-28 04:27:12,764 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 178 predicate places. [2023-01-28 04:27:12,764 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 756 transitions, 15149 flow [2023-01-28 04:27:12,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 86.86666666666666) internal successors, (1303), 15 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:12,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:27:12,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:27:12,773 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 04:27:12,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:12,971 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:27:12,971 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:27:12,971 INFO L85 PathProgramCache]: Analyzing trace with hash -359134195, now seen corresponding path program 8 times [2023-01-28 04:27:12,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:27:12,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599695093] [2023-01-28 04:27:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:27:12,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:27:12,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:27:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:13,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:27:13,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599695093] [2023-01-28 04:27:13,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599695093] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:27:13,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530683058] [2023-01-28 04:27:13,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:27:13,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:13,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:27:13,233 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 04:27:13,258 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 04:27:13,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:27:13,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:27:13,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-28 04:27:13,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:27:13,424 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 15 treesize of output 7 [2023-01-28 04:27:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:13,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:27:13,458 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:27:13,459 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 23 treesize of output 16 [2023-01-28 04:27:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:13,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530683058] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:27:13,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:27:13,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 04:27:13,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973893054] [2023-01-28 04:27:13,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:27:13,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 04:27:13,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:27:13,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 04:27:13,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-01-28 04:27:13,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 268 [2023-01-28 04:27:13,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 756 transitions, 15149 flow. Second operand has 11 states, 11 states have (on average 102.27272727272727) internal successors, (1125), 11 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:13,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:27:13,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 268 [2023-01-28 04:27:13,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:27:14,977 INFO L130 PetriNetUnfolder]: 5394/8174 cut-off events. [2023-01-28 04:27:14,977 INFO L131 PetriNetUnfolder]: For 168610/169622 co-relation queries the response was YES. [2023-01-28 04:27:15,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71644 conditions, 8174 events. 5394/8174 cut-off events. For 168610/169622 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 48702 event pairs, 1166 based on Foata normal form. 577/8520 useless extension candidates. Maximal degree in co-relation 71366. Up to 7407 conditions per place. [2023-01-28 04:27:15,051 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 551 selfloop transitions, 237 changer transitions 1/808 dead transitions. [2023-01-28 04:27:15,051 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 808 transitions, 17441 flow [2023-01-28 04:27:15,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:27:15,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:27:15,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 766 transitions. [2023-01-28 04:27:15,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40831556503198296 [2023-01-28 04:27:15,052 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 766 transitions. [2023-01-28 04:27:15,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 766 transitions. [2023-01-28 04:27:15,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:27:15,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 766 transitions. [2023-01-28 04:27:15,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.42857142857143) internal successors, (766), 7 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:15,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:15,055 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:15,055 INFO L175 Difference]: Start difference. First operand has 208 places, 756 transitions, 15149 flow. Second operand 7 states and 766 transitions. [2023-01-28 04:27:15,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 808 transitions, 17441 flow [2023-01-28 04:27:15,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 808 transitions, 17042 flow, removed 97 selfloop flow, removed 2 redundant places. [2023-01-28 04:27:15,757 INFO L231 Difference]: Finished difference. Result has 214 places, 770 transitions, 15608 flow [2023-01-28 04:27:15,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=14750, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=756, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=15608, PETRI_PLACES=214, PETRI_TRANSITIONS=770} [2023-01-28 04:27:15,758 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 184 predicate places. [2023-01-28 04:27:15,758 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 770 transitions, 15608 flow [2023-01-28 04:27:15,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 102.27272727272727) internal successors, (1125), 11 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:15,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:27:15,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:27:15,765 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 04:27:15,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:15,959 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:27:15,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:27:15,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2022426635, now seen corresponding path program 9 times [2023-01-28 04:27:15,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:27:15,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051048876] [2023-01-28 04:27:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:27:15,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:27:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:27:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:16,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:27:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051048876] [2023-01-28 04:27:16,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051048876] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:27:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309405752] [2023-01-28 04:27:16,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:27:16,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:16,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:27:16,333 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 04:27:16,356 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 04:27:16,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:27:16,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:27:16,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-28 04:27:16,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:27:16,484 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 04:27:16,518 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 04:27:16,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:27:16,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:27:16,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:27:16,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:27:16,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-01-28 04:27:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:27:16,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:27:16,712 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_989 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_989) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-01-28 04:27:16,765 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int)) (v_ArrVal_989 (Array Int Int))) (= (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_988) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_989) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0))) is different from false [2023-01-28 04:27:16,772 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int)) (v_ArrVal_987 (Array Int Int)) (v_ArrVal_989 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_987))) (= (+ c_~res2~0 (select (select (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_988) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_989) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ c_~res1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2023-01-28 04:27:16,778 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:27:16,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 40 [2023-01-28 04:27:16,783 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 2678 treesize of output 2422 [2023-01-28 04:27:16,798 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 61 treesize of output 57 [2023-01-28 04:27:16,802 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 74 treesize of output 66 [2023-01-28 04:27:16,805 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 124 treesize of output 118 [2023-01-28 04:27:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-01-28 04:27:16,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309405752] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:27:16,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:27:16,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2023-01-28 04:27:16,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115335800] [2023-01-28 04:27:16,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:27:16,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 04:27:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:27:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 04:27:16,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=308, Unknown=6, NotChecked=114, Total=506 [2023-01-28 04:27:16,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-28 04:27:16,842 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 770 transitions, 15608 flow. Second operand has 23 states, 23 states have (on average 85.95652173913044) internal successors, (1977), 23 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:16,842 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:27:16,842 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-28 04:27:16,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:27:18,795 INFO L130 PetriNetUnfolder]: 5560/8482 cut-off events. [2023-01-28 04:27:18,795 INFO L131 PetriNetUnfolder]: For 171143/172080 co-relation queries the response was YES. [2023-01-28 04:27:18,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74122 conditions, 8482 events. 5560/8482 cut-off events. For 171143/172080 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 51567 event pairs, 618 based on Foata normal form. 487/8714 useless extension candidates. Maximal degree in co-relation 73770. Up to 5408 conditions per place. [2023-01-28 04:27:18,859 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 361 selfloop transitions, 472 changer transitions 1/853 dead transitions. [2023-01-28 04:27:18,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 853 transitions, 18537 flow [2023-01-28 04:27:18,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:27:18,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:27:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 847 transitions. [2023-01-28 04:27:18,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3511608623548922 [2023-01-28 04:27:18,860 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 847 transitions. [2023-01-28 04:27:18,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 847 transitions. [2023-01-28 04:27:18,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:27:18,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 847 transitions. [2023-01-28 04:27:18,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 94.11111111111111) internal successors, (847), 9 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:18,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:18,864 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:18,864 INFO L175 Difference]: Start difference. First operand has 214 places, 770 transitions, 15608 flow. Second operand 9 states and 847 transitions. [2023-01-28 04:27:18,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 853 transitions, 18537 flow [2023-01-28 04:27:19,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 853 transitions, 18116 flow, removed 85 selfloop flow, removed 3 redundant places. [2023-01-28 04:27:19,597 INFO L231 Difference]: Finished difference. Result has 223 places, 797 transitions, 17167 flow [2023-01-28 04:27:19,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=15187, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=770, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17167, PETRI_PLACES=223, PETRI_TRANSITIONS=797} [2023-01-28 04:27:19,598 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 193 predicate places. [2023-01-28 04:27:19,598 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 797 transitions, 17167 flow [2023-01-28 04:27:19,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 85.95652173913044) internal successors, (1977), 23 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:19,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:27:19,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:27:19,603 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 04:27:19,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-28 04:27:19,799 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:27:19,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:27:19,800 INFO L85 PathProgramCache]: Analyzing trace with hash 333485237, now seen corresponding path program 5 times [2023-01-28 04:27:19,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:27:19,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843777676] [2023-01-28 04:27:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:27:19,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:27:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:27:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:27:20,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:27:20,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843777676] [2023-01-28 04:27:20,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843777676] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:27:20,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613255654] [2023-01-28 04:27:20,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:27:20,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:20,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:27:20,473 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 04:27:20,495 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 04:27:20,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:27:20,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:27:20,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-28 04:27:20,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:27:20,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:27:20,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:27:20,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-01-28 04:27:20,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 04:27:20,735 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 04:27:20,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:27:20,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:27:20,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:27:21,075 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:27:21,076 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:27:21,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 04:27:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:27:21,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:27:21,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:27:21,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2023-01-28 04:27:21,494 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:27:21,494 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 410 treesize of output 370 [2023-01-28 04:27:21,508 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 176 treesize of output 152 [2023-01-28 04:27:21,514 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 152 treesize of output 140 [2023-01-28 04:27:21,527 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:27:21,527 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 76 treesize of output 71 [2023-01-28 04:27:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:27:21,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613255654] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:27:21,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:27:21,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 27 [2023-01-28 04:27:21,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715144984] [2023-01-28 04:27:21,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:27:21,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 04:27:21,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:27:21,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 04:27:21,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=700, Unknown=10, NotChecked=0, Total=812 [2023-01-28 04:27:21,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 268 [2023-01-28 04:27:21,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 797 transitions, 17167 flow. Second operand has 29 states, 29 states have (on average 71.20689655172414) internal successors, (2065), 29 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:21,677 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:27:21,677 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 268 [2023-01-28 04:27:21,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:27:25,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:27:31,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:27:34,015 WARN L539 Checker$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 04:27:36,123 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:27:39,906 WARN L539 Checker$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 04:27:42,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:27:44,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:27:46,939 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:27:48,957 WARN L539 Checker$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 04:27:51,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 04:27:53,770 WARN L539 Checker$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 04:27:55,775 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 04:27:56,032 INFO L130 PetriNetUnfolder]: 7617/11497 cut-off events. [2023-01-28 04:27:56,033 INFO L131 PetriNetUnfolder]: For 232798/232798 co-relation queries the response was YES. [2023-01-28 04:27:56,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102103 conditions, 11497 events. 7617/11497 cut-off events. For 232798/232798 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 70030 event pairs, 577 based on Foata normal form. 3/11500 useless extension candidates. Maximal degree in co-relation 101626. Up to 5530 conditions per place. [2023-01-28 04:27:56,141 INFO L137 encePairwiseOnDemand]: 251/268 looper letters, 490 selfloop transitions, 742 changer transitions 10/1242 dead transitions. [2023-01-28 04:27:56,141 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 1242 transitions, 25613 flow [2023-01-28 04:27:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 04:27:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 04:27:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3320 transitions. [2023-01-28 04:27:56,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.294953802416489 [2023-01-28 04:27:56,147 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3320 transitions. [2023-01-28 04:27:56,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3320 transitions. [2023-01-28 04:27:56,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:27:56,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3320 transitions. [2023-01-28 04:27:56,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 79.04761904761905) internal successors, (3320), 42 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:56,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 268.0) internal successors, (11524), 43 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:56,159 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 268.0) internal successors, (11524), 43 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:56,159 INFO L175 Difference]: Start difference. First operand has 223 places, 797 transitions, 17167 flow. Second operand 42 states and 3320 transitions. [2023-01-28 04:27:56,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 1242 transitions, 25613 flow [2023-01-28 04:27:57,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 1242 transitions, 24709 flow, removed 358 selfloop flow, removed 2 redundant places. [2023-01-28 04:27:57,994 INFO L231 Difference]: Finished difference. Result has 277 places, 963 transitions, 22054 flow [2023-01-28 04:27:57,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=16763, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=22054, PETRI_PLACES=277, PETRI_TRANSITIONS=963} [2023-01-28 04:27:57,995 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 247 predicate places. [2023-01-28 04:27:57,995 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 963 transitions, 22054 flow [2023-01-28 04:27:57,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 71.20689655172414) internal successors, (2065), 29 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:57,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:27:57,996 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:27:58,005 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 04:27:58,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-01-28 04:27:58,202 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:27:58,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:27:58,203 INFO L85 PathProgramCache]: Analyzing trace with hash 336387392, now seen corresponding path program 10 times [2023-01-28 04:27:58,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:27:58,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081075911] [2023-01-28 04:27:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:27:58,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:27:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:27:58,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:58,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:27:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081075911] [2023-01-28 04:27:58,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081075911] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:27:58,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875161736] [2023-01-28 04:27:58,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:27:58,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:27:58,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:27:58,317 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 04:27:58,321 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 04:27:58,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:27:58,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:27:58,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:27:58,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:27:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:58,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:27:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:27:58,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875161736] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:27:58,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:27:58,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 04:27:58,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949423937] [2023-01-28 04:27:58,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:27:58,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 04:27:58,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:27:58,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 04:27:58,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-01-28 04:27:58,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-01-28 04:27:58,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 963 transitions, 22054 flow. Second operand has 14 states, 14 states have (on average 106.5) internal successors, (1491), 14 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:27:58,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:27:58,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-01-28 04:27:58,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:28:01,850 INFO L130 PetriNetUnfolder]: 7477/11620 cut-off events. [2023-01-28 04:28:01,850 INFO L131 PetriNetUnfolder]: For 328859/331975 co-relation queries the response was YES. [2023-01-28 04:28:01,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108957 conditions, 11620 events. 7477/11620 cut-off events. For 328859/331975 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 78954 event pairs, 1565 based on Foata normal form. 1775/12891 useless extension candidates. Maximal degree in co-relation 108663. Up to 5142 conditions per place. [2023-01-28 04:28:01,955 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 1040 selfloop transitions, 76 changer transitions 3/1194 dead transitions. [2023-01-28 04:28:01,955 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 1194 transitions, 28179 flow [2023-01-28 04:28:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:28:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:28:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 904 transitions. [2023-01-28 04:28:01,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216417910447761 [2023-01-28 04:28:01,957 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 904 transitions. [2023-01-28 04:28:01,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 904 transitions. [2023-01-28 04:28:01,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:28:01,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 904 transitions. [2023-01-28 04:28:01,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.0) internal successors, (904), 8 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:01,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:01,960 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:01,960 INFO L175 Difference]: Start difference. First operand has 277 places, 963 transitions, 22054 flow. Second operand 8 states and 904 transitions. [2023-01-28 04:28:01,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 1194 transitions, 28179 flow [2023-01-28 04:28:03,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 1194 transitions, 26553 flow, removed 449 selfloop flow, removed 16 redundant places. [2023-01-28 04:28:03,405 INFO L231 Difference]: Finished difference. Result has 267 places, 881 transitions, 19035 flow [2023-01-28 04:28:03,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=18387, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=859, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=783, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=19035, PETRI_PLACES=267, PETRI_TRANSITIONS=881} [2023-01-28 04:28:03,406 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 237 predicate places. [2023-01-28 04:28:03,406 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 881 transitions, 19035 flow [2023-01-28 04:28:03,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.5) internal successors, (1491), 14 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:03,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:28:03,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:28:03,415 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 04:28:03,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 04:28:03,613 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:28:03,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:28:03,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1130308509, now seen corresponding path program 6 times [2023-01-28 04:28:03,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:28:03,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259780374] [2023-01-28 04:28:03,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:28:03,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:28:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:28:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:28:04,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:28:04,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259780374] [2023-01-28 04:28:04,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259780374] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:28:04,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460145898] [2023-01-28 04:28:04,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:28:04,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:28:04,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:28:04,365 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 04:28:04,389 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 04:28:04,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:28:04,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:28:04,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 04:28:04,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:28:04,912 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:28:04,915 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:28:04,916 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 17 treesize of output 10 [2023-01-28 04:28:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:28:04,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:28:05,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:28:05,007 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 19 treesize of output 16 [2023-01-28 04:28:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:28:05,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460145898] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:28:05,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:28:05,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2023-01-28 04:28:05,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508369224] [2023-01-28 04:28:05,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:28:05,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 04:28:05,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:28:05,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 04:28:05,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2023-01-28 04:28:05,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 268 [2023-01-28 04:28:05,282 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 881 transitions, 19035 flow. Second operand has 24 states, 24 states have (on average 74.20833333333333) internal successors, (1781), 24 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:05,282 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:28:05,282 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 268 [2023-01-28 04:28:05,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:28:09,637 INFO L130 PetriNetUnfolder]: 8449/13270 cut-off events. [2023-01-28 04:28:09,637 INFO L131 PetriNetUnfolder]: For 251091/251530 co-relation queries the response was YES. [2023-01-28 04:28:09,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115450 conditions, 13270 events. 8449/13270 cut-off events. For 251091/251530 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 89767 event pairs, 1749 based on Foata normal form. 267/13461 useless extension candidates. Maximal degree in co-relation 115161. Up to 9639 conditions per place. [2023-01-28 04:28:09,774 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 521 selfloop transitions, 446 changer transitions 9/1024 dead transitions. [2023-01-28 04:28:09,775 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 1024 transitions, 22673 flow [2023-01-28 04:28:09,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 04:28:09,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 04:28:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1529 transitions. [2023-01-28 04:28:09,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3002749410840534 [2023-01-28 04:28:09,966 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1529 transitions. [2023-01-28 04:28:09,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1529 transitions. [2023-01-28 04:28:09,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:28:09,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1529 transitions. [2023-01-28 04:28:09,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 80.47368421052632) internal successors, (1529), 19 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:09,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:09,973 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:09,973 INFO L175 Difference]: Start difference. First operand has 267 places, 881 transitions, 19035 flow. Second operand 19 states and 1529 transitions. [2023-01-28 04:28:09,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 1024 transitions, 22673 flow [2023-01-28 04:28:11,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1024 transitions, 22668 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 04:28:11,741 INFO L231 Difference]: Finished difference. Result has 287 places, 927 transitions, 20790 flow [2023-01-28 04:28:11,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=19030, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=20790, PETRI_PLACES=287, PETRI_TRANSITIONS=927} [2023-01-28 04:28:11,742 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 257 predicate places. [2023-01-28 04:28:11,742 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 927 transitions, 20790 flow [2023-01-28 04:28:11,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 74.20833333333333) internal successors, (1781), 24 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:11,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:28:11,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:28:11,748 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 04:28:11,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:28:11,944 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:28:11,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:28:11,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1623411047, now seen corresponding path program 7 times [2023-01-28 04:28:11,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:28:11,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684324128] [2023-01-28 04:28:11,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:28:11,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:28:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:28:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:28:12,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:28:12,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684324128] [2023-01-28 04:28:12,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684324128] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:28:12,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850263803] [2023-01-28 04:28:12,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:28:12,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:28:12,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:28:12,435 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 04:28:12,437 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 04:28:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:28:12,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 65 conjunts are in the unsatisfiable core [2023-01-28 04:28:12,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:28:12,589 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 04:28:12,643 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 04:28:12,702 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 04:28:12,820 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 04:28:12,979 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 15 treesize of output 7 [2023-01-28 04:28:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:28:12,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:28:13,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:28:13,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850263803] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:28:13,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:28:13,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 27 [2023-01-28 04:28:13,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135026632] [2023-01-28 04:28:13,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:28:13,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 04:28:13,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:28:13,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 04:28:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=689, Unknown=8, NotChecked=0, Total=812 [2023-01-28 04:28:13,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 268 [2023-01-28 04:28:13,364 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 927 transitions, 20790 flow. Second operand has 29 states, 29 states have (on average 70.86206896551724) internal successors, (2055), 29 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:13,364 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:28:13,364 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 268 [2023-01-28 04:28:13,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:28:18,005 INFO L130 PetriNetUnfolder]: 9234/14339 cut-off events. [2023-01-28 04:28:18,006 INFO L131 PetriNetUnfolder]: For 292884/292884 co-relation queries the response was YES. [2023-01-28 04:28:18,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128506 conditions, 14339 events. 9234/14339 cut-off events. For 292884/292884 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 94263 event pairs, 2507 based on Foata normal form. 3/14342 useless extension candidates. Maximal degree in co-relation 128212. Up to 13100 conditions per place. [2023-01-28 04:28:18,231 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 710 selfloop transitions, 321 changer transitions 4/1035 dead transitions. [2023-01-28 04:28:18,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1035 transitions, 24797 flow [2023-01-28 04:28:18,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 04:28:18,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 04:28:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 991 transitions. [2023-01-28 04:28:18,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.284443168771527 [2023-01-28 04:28:18,233 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 991 transitions. [2023-01-28 04:28:18,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 991 transitions. [2023-01-28 04:28:18,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:28:18,234 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 991 transitions. [2023-01-28 04:28:18,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 76.23076923076923) internal successors, (991), 13 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:18,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:18,237 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:18,237 INFO L175 Difference]: Start difference. First operand has 287 places, 927 transitions, 20790 flow. Second operand 13 states and 991 transitions. [2023-01-28 04:28:18,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1035 transitions, 24797 flow [2023-01-28 04:28:20,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 1035 transitions, 24264 flow, removed 138 selfloop flow, removed 6 redundant places. [2023-01-28 04:28:20,293 INFO L231 Difference]: Finished difference. Result has 298 places, 980 transitions, 22567 flow [2023-01-28 04:28:20,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=20281, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=22567, PETRI_PLACES=298, PETRI_TRANSITIONS=980} [2023-01-28 04:28:20,294 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 268 predicate places. [2023-01-28 04:28:20,294 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 980 transitions, 22567 flow [2023-01-28 04:28:20,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 70.86206896551724) internal successors, (2055), 29 states have internal predecessors, (2055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:20,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:28:20,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:28:20,300 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 04:28:20,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 04:28:20,499 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:28:20,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:28:20,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1529826321, now seen corresponding path program 11 times [2023-01-28 04:28:20,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:28:20,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387289722] [2023-01-28 04:28:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:28:20,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:28:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:28:20,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:28:20,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:28:20,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387289722] [2023-01-28 04:28:20,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387289722] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:28:20,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085362126] [2023-01-28 04:28:20,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:28:20,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:28:20,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:28:20,784 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 04:28:20,787 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 04:28:20,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:28:20,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:28:20,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-28 04:28:20,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:28:21,008 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 15 treesize of output 7 [2023-01-28 04:28:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:28:21,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:28:21,065 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:28:21,066 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 19 treesize of output 16 [2023-01-28 04:28:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:28:21,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085362126] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:28:21,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:28:21,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-01-28 04:28:21,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542957513] [2023-01-28 04:28:21,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:28:21,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 04:28:21,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:28:21,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 04:28:21,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-01-28 04:28:21,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 268 [2023-01-28 04:28:21,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 980 transitions, 22567 flow. Second operand has 11 states, 11 states have (on average 102.27272727272727) internal successors, (1125), 11 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:21,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:28:21,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 268 [2023-01-28 04:28:21,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:28:25,117 INFO L130 PetriNetUnfolder]: 8655/13490 cut-off events. [2023-01-28 04:28:25,118 INFO L131 PetriNetUnfolder]: For 355000/357314 co-relation queries the response was YES. [2023-01-28 04:28:25,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126325 conditions, 13490 events. 8655/13490 cut-off events. For 355000/357314 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 91602 event pairs, 2008 based on Foata normal form. 864/13975 useless extension candidates. Maximal degree in co-relation 126025. Up to 12178 conditions per place. [2023-01-28 04:28:25,257 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 707 selfloop transitions, 288 changer transitions 1/1023 dead transitions. [2023-01-28 04:28:25,257 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 1023 transitions, 25214 flow [2023-01-28 04:28:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:28:25,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:28:25,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 767 transitions. [2023-01-28 04:28:25,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088486140724947 [2023-01-28 04:28:25,258 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 767 transitions. [2023-01-28 04:28:25,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 767 transitions. [2023-01-28 04:28:25,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:28:25,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 767 transitions. [2023-01-28 04:28:25,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 109.57142857142857) internal successors, (767), 7 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:25,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:25,260 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:25,260 INFO L175 Difference]: Start difference. First operand has 298 places, 980 transitions, 22567 flow. Second operand 7 states and 767 transitions. [2023-01-28 04:28:25,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 1023 transitions, 25214 flow [2023-01-28 04:28:27,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1023 transitions, 24873 flow, removed 144 selfloop flow, removed 3 redundant places. [2023-01-28 04:28:27,307 INFO L231 Difference]: Finished difference. Result has 303 places, 993 transitions, 23325 flow [2023-01-28 04:28:27,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22284, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=980, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=275, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=23325, PETRI_PLACES=303, PETRI_TRANSITIONS=993} [2023-01-28 04:28:27,309 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2023-01-28 04:28:27,309 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 993 transitions, 23325 flow [2023-01-28 04:28:27,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 102.27272727272727) internal successors, (1125), 11 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:27,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:28:27,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:28:27,314 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 04:28:27,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 04:28:27,511 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:28:27,512 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:28:27,512 INFO L85 PathProgramCache]: Analyzing trace with hash -680590633, now seen corresponding path program 8 times [2023-01-28 04:28:27,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:28:27,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625341844] [2023-01-28 04:28:27,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:28:27,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:28:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:28:28,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:28:28,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:28:28,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625341844] [2023-01-28 04:28:28,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625341844] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:28:28,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788602056] [2023-01-28 04:28:28,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:28:28,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:28:28,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:28:28,099 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 04:28:28,100 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 04:28:28,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:28:28,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:28:28,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 04:28:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:28:28,551 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 15 treesize of output 7 [2023-01-28 04:28:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:28:28,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:28:28,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:28:28,608 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 23 treesize of output 16 [2023-01-28 04:28:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:28:28,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788602056] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:28:28,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:28:28,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2023-01-28 04:28:28,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158410181] [2023-01-28 04:28:28,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:28:28,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 04:28:28,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:28:28,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 04:28:28,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-01-28 04:28:28,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 268 [2023-01-28 04:28:28,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 993 transitions, 23325 flow. Second operand has 22 states, 22 states have (on average 84.31818181818181) internal successors, (1855), 22 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:28,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:28:28,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 268 [2023-01-28 04:28:28,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:28:34,389 INFO L130 PetriNetUnfolder]: 9239/14536 cut-off events. [2023-01-28 04:28:34,390 INFO L131 PetriNetUnfolder]: For 314645/315027 co-relation queries the response was YES. [2023-01-28 04:28:34,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131932 conditions, 14536 events. 9239/14536 cut-off events. For 314645/315027 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 99810 event pairs, 1906 based on Foata normal form. 243/14708 useless extension candidates. Maximal degree in co-relation 131629. Up to 10500 conditions per place. [2023-01-28 04:28:34,546 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 526 selfloop transitions, 520 changer transitions 7/1101 dead transitions. [2023-01-28 04:28:34,546 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1101 transitions, 26784 flow [2023-01-28 04:28:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 04:28:34,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 04:28:34,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1531 transitions. [2023-01-28 04:28:34,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33604038630377525 [2023-01-28 04:28:34,548 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1531 transitions. [2023-01-28 04:28:34,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1531 transitions. [2023-01-28 04:28:34,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:28:34,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1531 transitions. [2023-01-28 04:28:34,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 90.05882352941177) internal successors, (1531), 17 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:34,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:34,552 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:34,552 INFO L175 Difference]: Start difference. First operand has 303 places, 993 transitions, 23325 flow. Second operand 17 states and 1531 transitions. [2023-01-28 04:28:34,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1101 transitions, 26784 flow [2023-01-28 04:28:36,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1101 transitions, 26053 flow, removed 85 selfloop flow, removed 4 redundant places. [2023-01-28 04:28:36,995 INFO L231 Difference]: Finished difference. Result has 319 places, 1024 transitions, 24415 flow [2023-01-28 04:28:36,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22606, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=993, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=492, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=24415, PETRI_PLACES=319, PETRI_TRANSITIONS=1024} [2023-01-28 04:28:36,996 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 289 predicate places. [2023-01-28 04:28:36,996 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 1024 transitions, 24415 flow [2023-01-28 04:28:36,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 84.31818181818181) internal successors, (1855), 22 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:36,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:28:36,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:28:37,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-01-28 04:28:37,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:28:37,197 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:28:37,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:28:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash 473817429, now seen corresponding path program 12 times [2023-01-28 04:28:37,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:28:37,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430693854] [2023-01-28 04:28:37,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:28:37,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:28:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:28:37,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:28:37,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:28:37,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430693854] [2023-01-28 04:28:37,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430693854] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:28:37,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035688999] [2023-01-28 04:28:37,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:28:37,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:28:37,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:28:37,883 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 04:28:37,885 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 04:28:38,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:28:38,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:28:38,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 04:28:38,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:28:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:28:38,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:28:38,312 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 15 treesize of output 7 [2023-01-28 04:28:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:28:38,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:28:38,373 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1311 (Array Int Int))) (= c_~res2~0 (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1311) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))))) is different from false [2023-01-28 04:28:38,383 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1311 (Array Int Int))) (= c_~res2~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1311) c_~A~0.base) c_~A~0.offset) c_~res1~0))) is different from false [2023-01-28 04:28:38,392 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:28:38,393 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 46 treesize of output 34 [2023-01-28 04:28:38,397 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 13 treesize of output 11 [2023-01-28 04:28:38,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-01-28 04:28:38,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035688999] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:28:38,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:28:38,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-01-28 04:28:38,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781646993] [2023-01-28 04:28:38,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:28:38,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 04:28:38,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:28:38,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 04:28:38,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=357, Unknown=2, NotChecked=78, Total=506 [2023-01-28 04:28:38,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 268 [2023-01-28 04:28:38,496 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1024 transitions, 24415 flow. Second operand has 23 states, 23 states have (on average 79.30434782608695) internal successors, (1824), 23 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:38,496 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:28:38,496 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 268 [2023-01-28 04:28:38,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:28:43,828 INFO L130 PetriNetUnfolder]: 10012/15577 cut-off events. [2023-01-28 04:28:43,828 INFO L131 PetriNetUnfolder]: For 350189/350189 co-relation queries the response was YES. [2023-01-28 04:28:43,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143297 conditions, 15577 events. 10012/15577 cut-off events. For 350189/350189 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 104255 event pairs, 2660 based on Foata normal form. 4/15581 useless extension candidates. Maximal degree in co-relation 142990. Up to 13716 conditions per place. [2023-01-28 04:28:43,981 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 750 selfloop transitions, 337 changer transitions 5/1092 dead transitions. [2023-01-28 04:28:43,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 1092 transitions, 27696 flow [2023-01-28 04:28:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 04:28:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 04:28:43,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 858 transitions. [2023-01-28 04:28:43,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3201492537313433 [2023-01-28 04:28:43,982 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 858 transitions. [2023-01-28 04:28:43,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 858 transitions. [2023-01-28 04:28:43,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:28:43,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 858 transitions. [2023-01-28 04:28:43,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 85.8) internal successors, (858), 10 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:43,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:43,985 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:43,985 INFO L175 Difference]: Start difference. First operand has 319 places, 1024 transitions, 24415 flow. Second operand 10 states and 858 transitions. [2023-01-28 04:28:43,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 1092 transitions, 27696 flow [2023-01-28 04:28:46,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1092 transitions, 27611 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-01-28 04:28:46,725 INFO L231 Difference]: Finished difference. Result has 328 places, 1051 transitions, 25808 flow [2023-01-28 04:28:46,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=24330, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=704, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=25808, PETRI_PLACES=328, PETRI_TRANSITIONS=1051} [2023-01-28 04:28:46,727 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 298 predicate places. [2023-01-28 04:28:46,727 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 1051 transitions, 25808 flow [2023-01-28 04:28:46,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 79.30434782608695) internal successors, (1824), 23 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:46,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:28:46,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:28:46,732 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 04:28:46,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:28:46,928 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:28:46,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:28:46,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1363870831, now seen corresponding path program 13 times [2023-01-28 04:28:46,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:28:46,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380083331] [2023-01-28 04:28:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:28:46,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:28:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:28:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:28:47,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:28:47,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380083331] [2023-01-28 04:28:47,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380083331] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:28:47,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013585568] [2023-01-28 04:28:47,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:28:47,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:28:47,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:28:47,250 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 04:28:47,252 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 04:28:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:28:47,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-01-28 04:28:47,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:28:47,403 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 04:28:47,446 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 04:28:47,479 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 04:28:47,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:28:47,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:28:47,641 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 15 treesize of output 7 [2023-01-28 04:28:47,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:28:47,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:28:47,789 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1360 (Array Int Int))) (= (+ c_~res2~0 (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))) (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1360) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-01-28 04:28:47,842 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1359 (Array Int Int)) (v_ArrVal_1360 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1359))) (= (+ c_~res2~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (+ c_~res1~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1360) c_~A~0.base) c_~A~0.offset))))) is different from false [2023-01-28 04:28:47,932 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:28:47,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2023-01-28 04:28:47,942 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 10294 treesize of output 9654 [2023-01-28 04:28:47,968 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 124 treesize of output 116 [2023-01-28 04:28:47,976 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 57 treesize of output 55 [2023-01-28 04:28:47,984 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 58 treesize of output 54 [2023-01-28 04:28:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:28:48,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013585568] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:28:48,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:28:48,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2023-01-28 04:28:48,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000147717] [2023-01-28 04:28:48,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:28:48,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 04:28:48,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:28:48,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 04:28:48,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=353, Unknown=20, NotChecked=82, Total=552 [2023-01-28 04:28:48,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-28 04:28:48,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 1051 transitions, 25808 flow. Second operand has 24 states, 24 states have (on average 85.875) internal successors, (2061), 24 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:48,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:28:48,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-28 04:28:48,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:28:48,506 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1360 (Array Int Int))) (= (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1360) c_~A~0.base) c_~A~0.offset)) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res2~0))) (= c_~res2~0 c_~res1~0)) is different from false [2023-01-28 04:28:52,771 INFO L130 PetriNetUnfolder]: 9529/14904 cut-off events. [2023-01-28 04:28:52,772 INFO L131 PetriNetUnfolder]: For 450442/452942 co-relation queries the response was YES. [2023-01-28 04:28:53,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144743 conditions, 14904 events. 9529/14904 cut-off events. For 450442/452942 co-relation queries the response was YES. Maximal size of possible extension queue 1013. Compared 103772 event pairs, 2479 based on Foata normal form. 906/15364 useless extension candidates. Maximal degree in co-relation 144432. Up to 13543 conditions per place. [2023-01-28 04:28:53,086 INFO L137 encePairwiseOnDemand]: 254/268 looper letters, 792 selfloop transitions, 292 changer transitions 1/1112 dead transitions. [2023-01-28 04:28:53,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1112 transitions, 28974 flow [2023-01-28 04:28:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:28:53,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:28:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 839 transitions. [2023-01-28 04:28:53,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3478441127694859 [2023-01-28 04:28:53,088 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 839 transitions. [2023-01-28 04:28:53,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 839 transitions. [2023-01-28 04:28:53,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:28:53,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 839 transitions. [2023-01-28 04:28:53,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 93.22222222222223) internal successors, (839), 9 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 04:28:53,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:53,091 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:53,091 INFO L175 Difference]: Start difference. First operand has 328 places, 1051 transitions, 25808 flow. Second operand 9 states and 839 transitions. [2023-01-28 04:28:53,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1112 transitions, 28974 flow [2023-01-28 04:28:55,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1112 transitions, 28333 flow, removed 107 selfloop flow, removed 4 redundant places. [2023-01-28 04:28:55,712 INFO L231 Difference]: Finished difference. Result has 335 places, 1077 transitions, 26482 flow [2023-01-28 04:28:55,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=25186, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1051, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=26482, PETRI_PLACES=335, PETRI_TRANSITIONS=1077} [2023-01-28 04:28:55,713 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 305 predicate places. [2023-01-28 04:28:55,713 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1077 transitions, 26482 flow [2023-01-28 04:28:55,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 85.875) internal successors, (2061), 24 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:55,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:28:55,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:28:55,718 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 04:28:55,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:28:55,914 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:28:55,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:28:55,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1131852009, now seen corresponding path program 14 times [2023-01-28 04:28:55,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:28:55,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422241241] [2023-01-28 04:28:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:28:55,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:28:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:28:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:28:56,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:28:56,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422241241] [2023-01-28 04:28:56,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422241241] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:28:56,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318833179] [2023-01-28 04:28:56,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:28:56,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:28:56,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:28:56,290 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 04:28:56,292 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 04:28:56,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:28:56,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:28:56,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 04:28:56,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:28:56,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:28:56,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:28:56,632 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 15 treesize of output 7 [2023-01-28 04:28:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:28:56,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:28:56,692 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1405 (Array Int Int))) (= (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1405) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))) c_~res1~0)) is different from false [2023-01-28 04:28:56,702 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:28:56,703 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 54 treesize of output 38 [2023-01-28 04:28:56,707 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 17 treesize of output 11 [2023-01-28 04:28:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-01-28 04:28:56,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318833179] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:28:56,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:28:56,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 04:28:56,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893799207] [2023-01-28 04:28:56,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:28:56,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:28:56,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:28:56,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:28:56,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=262, Unknown=1, NotChecked=34, Total=380 [2023-01-28 04:28:56,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-01-28 04:28:56,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1077 transitions, 26482 flow. Second operand has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:28:56,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:28:56,798 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-01-28 04:28:56,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:29:01,487 INFO L130 PetriNetUnfolder]: 9626/15101 cut-off events. [2023-01-28 04:29:01,487 INFO L131 PetriNetUnfolder]: For 464000/466644 co-relation queries the response was YES. [2023-01-28 04:29:01,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150669 conditions, 15101 events. 9626/15101 cut-off events. For 464000/466644 co-relation queries the response was YES. Maximal size of possible extension queue 1029. Compared 105736 event pairs, 2475 based on Foata normal form. 904/15574 useless extension candidates. Maximal degree in co-relation 150351. Up to 13364 conditions per place. [2023-01-28 04:29:01,668 INFO L137 encePairwiseOnDemand]: 261/268 looper letters, 792 selfloop transitions, 311 changer transitions 1/1131 dead transitions. [2023-01-28 04:29:01,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1131 transitions, 29572 flow [2023-01-28 04:29:01,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:29:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:29:01,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 743 transitions. [2023-01-28 04:29:01,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39605543710021324 [2023-01-28 04:29:01,670 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 743 transitions. [2023-01-28 04:29:01,670 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 743 transitions. [2023-01-28 04:29:01,670 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:29:01,670 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 743 transitions. [2023-01-28 04:29:01,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 106.14285714285714) internal successors, (743), 7 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:01,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:01,672 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:01,672 INFO L175 Difference]: Start difference. First operand has 335 places, 1077 transitions, 26482 flow. Second operand 7 states and 743 transitions. [2023-01-28 04:29:01,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1131 transitions, 29572 flow [2023-01-28 04:29:04,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 1131 transitions, 28993 flow, removed 149 selfloop flow, removed 4 redundant places. [2023-01-28 04:29:04,596 INFO L231 Difference]: Finished difference. Result has 339 places, 1084 transitions, 26919 flow [2023-01-28 04:29:04,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=25903, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26919, PETRI_PLACES=339, PETRI_TRANSITIONS=1084} [2023-01-28 04:29:04,597 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 309 predicate places. [2023-01-28 04:29:04,597 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 1084 transitions, 26919 flow [2023-01-28 04:29:04,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:04,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:29:04,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:29:04,603 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 04:29:04,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:29:04,798 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:29:04,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:29:04,798 INFO L85 PathProgramCache]: Analyzing trace with hash -88057735, now seen corresponding path program 15 times [2023-01-28 04:29:04,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:29:04,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879646731] [2023-01-28 04:29:04,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:29:04,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:29:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:29:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:29:05,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:29:05,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879646731] [2023-01-28 04:29:05,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879646731] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:29:05,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339500772] [2023-01-28 04:29:05,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:29:05,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:29:05,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:29:05,445 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 04:29:05,448 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 04:29:05,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:29:05,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:29:05,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 04:29:05,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:29:05,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:29:05,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-01-28 04:29:05,871 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 15 treesize of output 7 [2023-01-28 04:29:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:05,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:29:05,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:29:05,956 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 54 treesize of output 38 [2023-01-28 04:29:05,959 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 17 treesize of output 11 [2023-01-28 04:29:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:06,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339500772] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:29:06,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:29:06,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2023-01-28 04:29:06,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829998286] [2023-01-28 04:29:06,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:29:06,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 04:29:06,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:29:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 04:29:06,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=363, Unknown=6, NotChecked=0, Total=462 [2023-01-28 04:29:06,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-28 04:29:06,057 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 1084 transitions, 26919 flow. Second operand has 22 states, 22 states have (on average 86.04545454545455) internal successors, (1893), 22 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:06,057 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:29:06,057 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-28 04:29:06,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:29:10,915 INFO L130 PetriNetUnfolder]: 9783/15344 cut-off events. [2023-01-28 04:29:10,915 INFO L131 PetriNetUnfolder]: For 482635/485375 co-relation queries the response was YES. [2023-01-28 04:29:11,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153486 conditions, 15344 events. 9783/15344 cut-off events. For 482635/485375 co-relation queries the response was YES. Maximal size of possible extension queue 1032. Compared 107618 event pairs, 2567 based on Foata normal form. 956/15843 useless extension candidates. Maximal degree in co-relation 153165. Up to 13697 conditions per place. [2023-01-28 04:29:11,070 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 801 selfloop transitions, 293 changer transitions 1/1122 dead transitions. [2023-01-28 04:29:11,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 1122 transitions, 29689 flow [2023-01-28 04:29:11,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:29:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:29:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 746 transitions. [2023-01-28 04:29:11,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34794776119402987 [2023-01-28 04:29:11,071 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 746 transitions. [2023-01-28 04:29:11,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 746 transitions. [2023-01-28 04:29:11,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:29:11,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 746 transitions. [2023-01-28 04:29:11,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.25) internal successors, (746), 8 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:11,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:11,073 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:11,073 INFO L175 Difference]: Start difference. First operand has 339 places, 1084 transitions, 26919 flow. Second operand 8 states and 746 transitions. [2023-01-28 04:29:11,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 1122 transitions, 29689 flow [2023-01-28 04:29:13,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1122 transitions, 29017 flow, removed 89 selfloop flow, removed 4 redundant places. [2023-01-28 04:29:13,547 INFO L231 Difference]: Finished difference. Result has 343 places, 1087 transitions, 27015 flow [2023-01-28 04:29:13,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26253, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=791, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=27015, PETRI_PLACES=343, PETRI_TRANSITIONS=1087} [2023-01-28 04:29:13,548 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 313 predicate places. [2023-01-28 04:29:13,548 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1087 transitions, 27015 flow [2023-01-28 04:29:13,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 86.04545454545455) internal successors, (1893), 22 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:13,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:29:13,548 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:29:13,553 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 04:29:13,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-01-28 04:29:13,749 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:29:13,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:29:13,749 INFO L85 PathProgramCache]: Analyzing trace with hash 864792561, now seen corresponding path program 9 times [2023-01-28 04:29:13,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:29:13,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968448748] [2023-01-28 04:29:13,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:29:13,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:29:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:29:13,938 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 04:29:13,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:29:13,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968448748] [2023-01-28 04:29:13,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968448748] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:29:13,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420662041] [2023-01-28 04:29:13,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:29:13,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:29:13,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:29:13,940 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 04:29:13,966 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 04:29:14,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:29:14,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:29:14,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:29:14,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:29:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:14,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:29:14,226 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:14,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420662041] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:29:14,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:29:14,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 04:29:14,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104547141] [2023-01-28 04:29:14,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:29:14,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 04:29:14,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:29:14,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 04:29:14,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-28 04:29:14,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-01-28 04:29:14,230 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1087 transitions, 27015 flow. Second operand has 14 states, 14 states have (on average 106.35714285714286) internal successors, (1489), 14 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:14,230 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:29:14,230 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-01-28 04:29:14,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:29:17,905 INFO L130 PetriNetUnfolder]: 7731/12129 cut-off events. [2023-01-28 04:29:17,905 INFO L131 PetriNetUnfolder]: For 390715/393250 co-relation queries the response was YES. [2023-01-28 04:29:17,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124729 conditions, 12129 events. 7731/12129 cut-off events. For 390715/393250 co-relation queries the response was YES. Maximal size of possible extension queue 927. Compared 83628 event pairs, 2591 based on Foata normal form. 1385/12969 useless extension candidates. Maximal degree in co-relation 124407. Up to 7912 conditions per place. [2023-01-28 04:29:18,044 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 998 selfloop transitions, 188 changer transitions 0/1261 dead transitions. [2023-01-28 04:29:18,045 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1261 transitions, 32625 flow [2023-01-28 04:29:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 04:29:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 04:29:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 793 transitions. [2023-01-28 04:29:18,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227078891257996 [2023-01-28 04:29:18,046 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 793 transitions. [2023-01-28 04:29:18,046 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 793 transitions. [2023-01-28 04:29:18,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:29:18,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 793 transitions. [2023-01-28 04:29:18,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 113.28571428571429) internal successors, (793), 7 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:18,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:18,048 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:18,048 INFO L175 Difference]: Start difference. First operand has 343 places, 1087 transitions, 27015 flow. Second operand 7 states and 793 transitions. [2023-01-28 04:29:18,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1261 transitions, 32625 flow [2023-01-28 04:29:19,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 1261 transitions, 31773 flow, removed 135 selfloop flow, removed 6 redundant places. [2023-01-28 04:29:19,991 INFO L231 Difference]: Finished difference. Result has 343 places, 1086 transitions, 26833 flow [2023-01-28 04:29:19,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26199, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=26833, PETRI_PLACES=343, PETRI_TRANSITIONS=1086} [2023-01-28 04:29:19,992 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 313 predicate places. [2023-01-28 04:29:19,992 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1086 transitions, 26833 flow [2023-01-28 04:29:19,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 106.35714285714286) internal successors, (1489), 14 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:19,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:29:19,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:29:19,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 04:29:20,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:29:20,193 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:29:20,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:29:20,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1281008670, now seen corresponding path program 16 times [2023-01-28 04:29:20,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:29:20,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536083007] [2023-01-28 04:29:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:29:20,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:29:20,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:29:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:29:20,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:29:20,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536083007] [2023-01-28 04:29:20,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536083007] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:29:20,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107141208] [2023-01-28 04:29:20,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:29:20,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:29:20,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:29:20,318 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 04:29:20,320 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 04:29:20,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:29:20,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:29:20,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 04:29:20,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:29:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:29:20,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:29:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:29:20,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107141208] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:29:20,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:29:20,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2023-01-28 04:29:20,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739038867] [2023-01-28 04:29:20,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:29:20,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 04:29:20,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:29:20,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 04:29:20,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-01-28 04:29:20,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 268 [2023-01-28 04:29:20,647 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1086 transitions, 26833 flow. Second operand has 15 states, 15 states have (on average 101.6) internal successors, (1524), 15 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:20,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:29:20,648 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 268 [2023-01-28 04:29:20,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:29:24,635 INFO L130 PetriNetUnfolder]: 7824/12510 cut-off events. [2023-01-28 04:29:24,635 INFO L131 PetriNetUnfolder]: For 335449/335536 co-relation queries the response was YES. [2023-01-28 04:29:24,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123972 conditions, 12510 events. 7824/12510 cut-off events. For 335449/335536 co-relation queries the response was YES. Maximal size of possible extension queue 801. Compared 86119 event pairs, 1503 based on Foata normal form. 659/13153 useless extension candidates. Maximal degree in co-relation 123647. Up to 5141 conditions per place. [2023-01-28 04:29:24,774 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 1105 selfloop transitions, 156 changer transitions 143/1448 dead transitions. [2023-01-28 04:29:24,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 1448 transitions, 35506 flow [2023-01-28 04:29:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:29:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:29:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 983 transitions. [2023-01-28 04:29:24,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40754560530679934 [2023-01-28 04:29:24,777 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 983 transitions. [2023-01-28 04:29:24,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 983 transitions. [2023-01-28 04:29:24,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:29:24,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 983 transitions. [2023-01-28 04:29:24,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 109.22222222222223) internal successors, (983), 9 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:24,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:24,780 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:24,780 INFO L175 Difference]: Start difference. First operand has 343 places, 1086 transitions, 26833 flow. Second operand 9 states and 983 transitions. [2023-01-28 04:29:24,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 1448 transitions, 35506 flow [2023-01-28 04:29:27,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1448 transitions, 34468 flow, removed 279 selfloop flow, removed 6 redundant places. [2023-01-28 04:29:27,161 INFO L231 Difference]: Finished difference. Result has 349 places, 983 transitions, 23563 flow [2023-01-28 04:29:27,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=25800, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1067, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=922, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23563, PETRI_PLACES=349, PETRI_TRANSITIONS=983} [2023-01-28 04:29:27,162 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 319 predicate places. [2023-01-28 04:29:27,162 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 983 transitions, 23563 flow [2023-01-28 04:29:27,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 101.6) internal successors, (1524), 15 states have internal predecessors, (1524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:27,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:29:27,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:29:27,169 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 04:29:27,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:29:27,368 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:29:27,368 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:29:27,368 INFO L85 PathProgramCache]: Analyzing trace with hash -679121118, now seen corresponding path program 1 times [2023-01-28 04:29:27,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:29:27,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359835765] [2023-01-28 04:29:27,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:29:27,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:29:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:29:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:27,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:29:27,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359835765] [2023-01-28 04:29:27,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359835765] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:29:27,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522846550] [2023-01-28 04:29:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:29:27,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:29:27,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:29:27,484 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 04:29:27,485 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 04:29:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:29:27,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 04:29:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:29:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:27,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:29:27,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:27,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522846550] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:29:27,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:29:27,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 04:29:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126362817] [2023-01-28 04:29:27,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:29:27,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:29:27,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:29:27,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:29:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:29:27,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:29:27,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 983 transitions, 23563 flow. Second operand has 18 states, 18 states have (on average 99.05555555555556) internal successors, (1783), 18 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:27,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:29:27,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:29:27,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:29:32,675 INFO L130 PetriNetUnfolder]: 8850/14370 cut-off events. [2023-01-28 04:29:32,675 INFO L131 PetriNetUnfolder]: For 368514/368593 co-relation queries the response was YES. [2023-01-28 04:29:32,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139190 conditions, 14370 events. 8850/14370 cut-off events. For 368514/368593 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 103253 event pairs, 597 based on Foata normal form. 300/14656 useless extension candidates. Maximal degree in co-relation 138864. Up to 5816 conditions per place. [2023-01-28 04:29:32,845 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 1220 selfloop transitions, 398 changer transitions 83/1745 dead transitions. [2023-01-28 04:29:32,845 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 1745 transitions, 39102 flow [2023-01-28 04:29:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:29:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:29:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2128 transitions. [2023-01-28 04:29:32,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3970149253731343 [2023-01-28 04:29:32,849 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2128 transitions. [2023-01-28 04:29:32,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2128 transitions. [2023-01-28 04:29:32,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:29:32,849 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2128 transitions. [2023-01-28 04:29:32,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 106.4) internal successors, (2128), 20 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:32,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:32,855 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:32,855 INFO L175 Difference]: Start difference. First operand has 349 places, 983 transitions, 23563 flow. Second operand 20 states and 2128 transitions. [2023-01-28 04:29:32,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 1745 transitions, 39102 flow [2023-01-28 04:29:35,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1745 transitions, 38697 flow, removed 105 selfloop flow, removed 7 redundant places. [2023-01-28 04:29:35,998 INFO L231 Difference]: Finished difference. Result has 362 places, 1141 transitions, 27345 flow [2023-01-28 04:29:35,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=23247, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=696, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=27345, PETRI_PLACES=362, PETRI_TRANSITIONS=1141} [2023-01-28 04:29:35,999 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 332 predicate places. [2023-01-28 04:29:35,999 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1141 transitions, 27345 flow [2023-01-28 04:29:35,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.05555555555556) internal successors, (1783), 18 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:35,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:29:35,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:29:36,004 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 04:29:36,200 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,SelfDestructingSolverStorable36 [2023-01-28 04:29:36,200 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:29:36,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:29:36,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1528449100, now seen corresponding path program 2 times [2023-01-28 04:29:36,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:29:36,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468881153] [2023-01-28 04:29:36,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:29:36,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:29:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:29:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:36,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:29:36,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468881153] [2023-01-28 04:29:36,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468881153] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:29:36,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550522043] [2023-01-28 04:29:36,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:29:36,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:29:36,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:29:36,321 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 04:29:36,348 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 04:29:36,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:29:36,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:29:36,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 04:29:36,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:29:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:36,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:29:36,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:36,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550522043] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:29:36,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:29:36,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 04:29:36,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944287391] [2023-01-28 04:29:36,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:29:36,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 04:29:36,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:29:36,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 04:29:36,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-01-28 04:29:36,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:29:36,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1141 transitions, 27345 flow. Second operand has 17 states, 17 states have (on average 99.29411764705883) internal successors, (1688), 17 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:36,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:29:36,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:29:36,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:29:42,011 INFO L130 PetriNetUnfolder]: 9019/14632 cut-off events. [2023-01-28 04:29:42,011 INFO L131 PetriNetUnfolder]: For 420222/420339 co-relation queries the response was YES. [2023-01-28 04:29:42,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149747 conditions, 14632 events. 9019/14632 cut-off events. For 420222/420339 co-relation queries the response was YES. Maximal size of possible extension queue 985. Compared 106013 event pairs, 611 based on Foata normal form. 252/14864 useless extension candidates. Maximal degree in co-relation 149418. Up to 6018 conditions per place. [2023-01-28 04:29:42,172 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 1279 selfloop transitions, 307 changer transitions 55/1685 dead transitions. [2023-01-28 04:29:42,172 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1685 transitions, 38366 flow [2023-01-28 04:29:42,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 04:29:42,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 04:29:42,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2141 transitions. [2023-01-28 04:29:42,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994402985074627 [2023-01-28 04:29:42,174 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2141 transitions. [2023-01-28 04:29:42,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2141 transitions. [2023-01-28 04:29:42,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:29:42,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2141 transitions. [2023-01-28 04:29:42,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 107.05) internal successors, (2141), 20 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:42,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:42,180 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 268.0) internal successors, (5628), 21 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:42,180 INFO L175 Difference]: Start difference. First operand has 362 places, 1141 transitions, 27345 flow. Second operand 20 states and 2141 transitions. [2023-01-28 04:29:42,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1685 transitions, 38366 flow [2023-01-28 04:29:46,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1685 transitions, 37856 flow, removed 155 selfloop flow, removed 10 redundant places. [2023-01-28 04:29:46,031 INFO L231 Difference]: Finished difference. Result has 377 places, 1151 transitions, 27666 flow [2023-01-28 04:29:46,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26646, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=27666, PETRI_PLACES=377, PETRI_TRANSITIONS=1151} [2023-01-28 04:29:46,032 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 347 predicate places. [2023-01-28 04:29:46,032 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 1151 transitions, 27666 flow [2023-01-28 04:29:46,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 99.29411764705883) internal successors, (1688), 17 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:46,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:29:46,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:29:46,037 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 04:29:46,232 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,SelfDestructingSolverStorable37 [2023-01-28 04:29:46,233 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:29:46,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:29:46,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1030418006, now seen corresponding path program 3 times [2023-01-28 04:29:46,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:29:46,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252463663] [2023-01-28 04:29:46,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:29:46,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:29:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:29:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:46,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:29:46,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252463663] [2023-01-28 04:29:46,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252463663] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:29:46,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382453032] [2023-01-28 04:29:46,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:29:46,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:29:46,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:29:46,392 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 04:29:46,393 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 04:29:46,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 04:29:46,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:29:46,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 04:29:46,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:29:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:46,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:29:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:46,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382453032] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:29:46,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:29:46,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 04:29:46,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258772785] [2023-01-28 04:29:46,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:29:46,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:29:46,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:29:46,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:29:46,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:29:46,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:29:46,759 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1151 transitions, 27666 flow. Second operand has 18 states, 18 states have (on average 99.27777777777777) internal successors, (1787), 18 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:46,759 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:29:46,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:29:46,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:29:51,645 INFO L130 PetriNetUnfolder]: 8887/14183 cut-off events. [2023-01-28 04:29:51,646 INFO L131 PetriNetUnfolder]: For 366040/366151 co-relation queries the response was YES. [2023-01-28 04:29:51,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143200 conditions, 14183 events. 8887/14183 cut-off events. For 366040/366151 co-relation queries the response was YES. Maximal size of possible extension queue 945. Compared 99325 event pairs, 525 based on Foata normal form. 332/14498 useless extension candidates. Maximal degree in co-relation 142887. Up to 5238 conditions per place. [2023-01-28 04:29:51,803 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 1269 selfloop transitions, 349 changer transitions 31/1693 dead transitions. [2023-01-28 04:29:51,804 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1693 transitions, 39055 flow [2023-01-28 04:29:51,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 04:29:51,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 04:29:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1804 transitions. [2023-01-28 04:29:51,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39596136962247586 [2023-01-28 04:29:51,805 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1804 transitions. [2023-01-28 04:29:51,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1804 transitions. [2023-01-28 04:29:51,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:29:51,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1804 transitions. [2023-01-28 04:29:51,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 106.11764705882354) internal successors, (1804), 17 states have internal predecessors, (1804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:51,810 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:51,810 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:51,810 INFO L175 Difference]: Start difference. First operand has 377 places, 1151 transitions, 27666 flow. Second operand 17 states and 1804 transitions. [2023-01-28 04:29:51,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1693 transitions, 39055 flow [2023-01-28 04:29:55,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1693 transitions, 38402 flow, removed 292 selfloop flow, removed 5 redundant places. [2023-01-28 04:29:55,229 INFO L231 Difference]: Finished difference. Result has 391 places, 1213 transitions, 29205 flow [2023-01-28 04:29:55,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=27014, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=29205, PETRI_PLACES=391, PETRI_TRANSITIONS=1213} [2023-01-28 04:29:55,230 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 361 predicate places. [2023-01-28 04:29:55,230 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 1213 transitions, 29205 flow [2023-01-28 04:29:55,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.27777777777777) internal successors, (1787), 18 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:55,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:29:55,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:29:55,237 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 04:29:55,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 04:29:55,431 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:29:55,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:29:55,432 INFO L85 PathProgramCache]: Analyzing trace with hash -113433500, now seen corresponding path program 4 times [2023-01-28 04:29:55,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:29:55,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73245574] [2023-01-28 04:29:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:29:55,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:29:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:29:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:55,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:29:55,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73245574] [2023-01-28 04:29:55,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73245574] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:29:55,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70099897] [2023-01-28 04:29:55,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:29:55,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:29:55,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:29:55,533 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 04:29:55,536 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 04:29:55,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:29:55,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:29:55,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 04:29:55,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:29:55,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:55,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:29:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:29:55,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70099897] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:29:55,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:29:55,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 04:29:55,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820109703] [2023-01-28 04:29:55,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:29:55,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 04:29:55,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:29:55,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 04:29:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-01-28 04:29:55,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:29:55,828 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1213 transitions, 29205 flow. Second operand has 16 states, 16 states have (on average 99.3125) internal successors, (1589), 16 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:29:55,828 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:29:55,828 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:29:55,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:30:01,547 INFO L130 PetriNetUnfolder]: 8826/14580 cut-off events. [2023-01-28 04:30:01,548 INFO L131 PetriNetUnfolder]: For 388620/388744 co-relation queries the response was YES. [2023-01-28 04:30:01,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146372 conditions, 14580 events. 8826/14580 cut-off events. For 388620/388744 co-relation queries the response was YES. Maximal size of possible extension queue 1005. Compared 108058 event pairs, 615 based on Foata normal form. 490/15047 useless extension candidates. Maximal degree in co-relation 146055. Up to 5535 conditions per place. [2023-01-28 04:30:01,699 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 1095 selfloop transitions, 309 changer transitions 92/1536 dead transitions. [2023-01-28 04:30:01,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 1536 transitions, 35734 flow [2023-01-28 04:30:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 04:30:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 04:30:01,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1483 transitions. [2023-01-28 04:30:01,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39525586353944564 [2023-01-28 04:30:01,701 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1483 transitions. [2023-01-28 04:30:01,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1483 transitions. [2023-01-28 04:30:01,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:30:01,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1483 transitions. [2023-01-28 04:30:01,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 105.92857142857143) internal successors, (1483), 14 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:01,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:01,704 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:01,704 INFO L175 Difference]: Start difference. First operand has 391 places, 1213 transitions, 29205 flow. Second operand 14 states and 1483 transitions. [2023-01-28 04:30:01,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 1536 transitions, 35734 flow [2023-01-28 04:30:04,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1536 transitions, 35167 flow, removed 126 selfloop flow, removed 8 redundant places. [2023-01-28 04:30:04,814 INFO L231 Difference]: Finished difference. Result has 397 places, 1061 transitions, 25480 flow [2023-01-28 04:30:04,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=25830, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=25480, PETRI_PLACES=397, PETRI_TRANSITIONS=1061} [2023-01-28 04:30:04,815 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2023-01-28 04:30:04,815 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1061 transitions, 25480 flow [2023-01-28 04:30:04,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 99.3125) internal successors, (1589), 16 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:04,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:30:04,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:30:04,820 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 04:30:05,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 04:30:05,021 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:30:05,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:30:05,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1696058592, now seen corresponding path program 5 times [2023-01-28 04:30:05,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:30:05,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380056015] [2023-01-28 04:30:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:30:05,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:30:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:30:05,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:30:05,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380056015] [2023-01-28 04:30:05,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380056015] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:30:05,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845081486] [2023-01-28 04:30:05,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:30:05,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:05,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:30:05,133 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 04:30:05,156 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 04:30:05,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:30:05,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:30:05,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 04:30:05,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:30:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:30:05,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:30:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:30:05,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845081486] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:30:05,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:30:05,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-01-28 04:30:05,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256154502] [2023-01-28 04:30:05,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:30:05,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 04:30:05,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:30:05,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 04:30:05,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-01-28 04:30:05,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:30:05,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1061 transitions, 25480 flow. Second operand has 17 states, 17 states have (on average 99.29411764705883) internal successors, (1688), 17 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:05,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:30:05,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:30:05,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:30:10,158 INFO L130 PetriNetUnfolder]: 7999/13015 cut-off events. [2023-01-28 04:30:10,158 INFO L131 PetriNetUnfolder]: For 361255/361371 co-relation queries the response was YES. [2023-01-28 04:30:10,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133370 conditions, 13015 events. 7999/13015 cut-off events. For 361255/361371 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 93092 event pairs, 690 based on Foata normal form. 214/13207 useless extension candidates. Maximal degree in co-relation 133052. Up to 4882 conditions per place. [2023-01-28 04:30:10,298 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 1211 selfloop transitions, 150 changer transitions 32/1432 dead transitions. [2023-01-28 04:30:10,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1432 transitions, 33354 flow [2023-01-28 04:30:10,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 04:30:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 04:30:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1493 transitions. [2023-01-28 04:30:10,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39792110874200426 [2023-01-28 04:30:10,300 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1493 transitions. [2023-01-28 04:30:10,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1493 transitions. [2023-01-28 04:30:10,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:30:10,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1493 transitions. [2023-01-28 04:30:10,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 106.64285714285714) internal successors, (1493), 14 states have internal predecessors, (1493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:10,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:10,304 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:10,304 INFO L175 Difference]: Start difference. First operand has 397 places, 1061 transitions, 25480 flow. Second operand 14 states and 1493 transitions. [2023-01-28 04:30:10,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1432 transitions, 33354 flow [2023-01-28 04:30:13,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1432 transitions, 32476 flow, removed 177 selfloop flow, removed 17 redundant places. [2023-01-28 04:30:13,165 INFO L231 Difference]: Finished difference. Result has 384 places, 1012 transitions, 23849 flow [2023-01-28 04:30:13,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=24154, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1027, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=880, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=23849, PETRI_PLACES=384, PETRI_TRANSITIONS=1012} [2023-01-28 04:30:13,166 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 354 predicate places. [2023-01-28 04:30:13,166 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 1012 transitions, 23849 flow [2023-01-28 04:30:13,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 99.29411764705883) internal successors, (1688), 17 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:13,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:30:13,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:30:13,173 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 04:30:13,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:13,374 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:30:13,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:30:13,374 INFO L85 PathProgramCache]: Analyzing trace with hash 179321848, now seen corresponding path program 6 times [2023-01-28 04:30:13,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:30:13,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569589187] [2023-01-28 04:30:13,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:30:13,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:30:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:30:13,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:30:13,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569589187] [2023-01-28 04:30:13,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569589187] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:30:13,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088696232] [2023-01-28 04:30:13,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:30:13,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:13,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:30:13,469 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 04:30:13,472 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 04:30:13,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 04:30:13,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:30:13,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 04:30:13,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:30:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:30:13,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:30:13,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:30:13,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088696232] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:30:13,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:30:13,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-01-28 04:30:13,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559531471] [2023-01-28 04:30:13,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:30:13,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 04:30:13,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:30:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 04:30:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-01-28 04:30:13,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:30:13,779 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 1012 transitions, 23849 flow. Second operand has 16 states, 16 states have (on average 99.9375) internal successors, (1599), 16 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:13,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:30:13,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:30:13,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:30:17,635 INFO L130 PetriNetUnfolder]: 7249/11996 cut-off events. [2023-01-28 04:30:17,636 INFO L131 PetriNetUnfolder]: For 336246/336358 co-relation queries the response was YES. [2023-01-28 04:30:17,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122856 conditions, 11996 events. 7249/11996 cut-off events. For 336246/336358 co-relation queries the response was YES. Maximal size of possible extension queue 838. Compared 86604 event pairs, 1052 based on Foata normal form. 544/12519 useless extension candidates. Maximal degree in co-relation 122547. Up to 4571 conditions per place. [2023-01-28 04:30:17,762 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 938 selfloop transitions, 67 changer transitions 83/1125 dead transitions. [2023-01-28 04:30:17,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1125 transitions, 26938 flow [2023-01-28 04:30:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 04:30:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 04:30:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1167 transitions. [2023-01-28 04:30:17,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958616010854817 [2023-01-28 04:30:17,764 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1167 transitions. [2023-01-28 04:30:17,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1167 transitions. [2023-01-28 04:30:17,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:30:17,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1167 transitions. [2023-01-28 04:30:17,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 106.0909090909091) internal successors, (1167), 11 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:17,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:17,767 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:17,767 INFO L175 Difference]: Start difference. First operand has 384 places, 1012 transitions, 23849 flow. Second operand 11 states and 1167 transitions. [2023-01-28 04:30:17,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1125 transitions, 26938 flow [2023-01-28 04:30:20,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 1125 transitions, 26749 flow, removed 69 selfloop flow, removed 6 redundant places. [2023-01-28 04:30:20,355 INFO L231 Difference]: Finished difference. Result has 382 places, 901 transitions, 21656 flow [2023-01-28 04:30:20,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22525, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=946, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21656, PETRI_PLACES=382, PETRI_TRANSITIONS=901} [2023-01-28 04:30:20,356 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 352 predicate places. [2023-01-28 04:30:20,356 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 901 transitions, 21656 flow [2023-01-28 04:30:20,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 99.9375) internal successors, (1599), 16 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:20,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:30:20,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:30:20,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-28 04:30:20,565 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,SelfDestructingSolverStorable41 [2023-01-28 04:30:20,565 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:30:20,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:30:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1957145404, now seen corresponding path program 10 times [2023-01-28 04:30:20,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:30:20,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089138238] [2023-01-28 04:30:20,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:30:20,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:30:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:30:20,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:30:20,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089138238] [2023-01-28 04:30:20,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089138238] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:30:20,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036069578] [2023-01-28 04:30:20,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:30:20,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:20,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:30:20,697 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 04:30:20,700 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 04:30:20,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:30:20,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:30:20,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2023-01-28 04:30:20,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:30:20,981 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:30:20,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:30:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 04:30:21,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036069578] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:30:21,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:30:21,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 04:30:21,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994941769] [2023-01-28 04:30:21,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:30:21,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 04:30:21,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:30:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 04:30:21,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-01-28 04:30:21,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 268 [2023-01-28 04:30:21,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 901 transitions, 21656 flow. Second operand has 14 states, 14 states have (on average 102.85714285714286) internal successors, (1440), 14 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:21,045 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:30:21,045 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 268 [2023-01-28 04:30:21,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:30:23,321 INFO L130 PetriNetUnfolder]: 4402/7094 cut-off events. [2023-01-28 04:30:23,321 INFO L131 PetriNetUnfolder]: For 254456/254705 co-relation queries the response was YES. [2023-01-28 04:30:23,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84036 conditions, 7094 events. 4402/7094 cut-off events. For 254456/254705 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 45611 event pairs, 665 based on Foata normal form. 527/7566 useless extension candidates. Maximal degree in co-relation 83904. Up to 2916 conditions per place. [2023-01-28 04:30:23,397 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 610 selfloop transitions, 36 changer transitions 217/916 dead transitions. [2023-01-28 04:30:23,397 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 916 transitions, 23402 flow [2023-01-28 04:30:23,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 04:30:23,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 04:30:23,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 866 transitions. [2023-01-28 04:30:23,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4039179104477612 [2023-01-28 04:30:23,399 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 866 transitions. [2023-01-28 04:30:23,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 866 transitions. [2023-01-28 04:30:23,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:30:23,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 866 transitions. [2023-01-28 04:30:23,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 108.25) internal successors, (866), 8 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:23,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:23,401 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:23,401 INFO L175 Difference]: Start difference. First operand has 382 places, 901 transitions, 21656 flow. Second operand 8 states and 866 transitions. [2023-01-28 04:30:23,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 916 transitions, 23402 flow [2023-01-28 04:30:24,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 916 transitions, 22389 flow, removed 110 selfloop flow, removed 22 redundant places. [2023-01-28 04:30:24,865 INFO L231 Difference]: Finished difference. Result has 334 places, 632 transitions, 14460 flow [2023-01-28 04:30:24,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=19544, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=781, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14460, PETRI_PLACES=334, PETRI_TRANSITIONS=632} [2023-01-28 04:30:24,866 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2023-01-28 04:30:24,866 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 632 transitions, 14460 flow [2023-01-28 04:30:24,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 102.85714285714286) internal successors, (1440), 14 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:24,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:30:24,866 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:30:24,871 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 04:30:25,067 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,SelfDestructingSolverStorable42 [2023-01-28 04:30:25,067 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:30:25,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:30:25,067 INFO L85 PathProgramCache]: Analyzing trace with hash 517966924, now seen corresponding path program 17 times [2023-01-28 04:30:25,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:30:25,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930825111] [2023-01-28 04:30:25,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:30:25,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:30:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:25,169 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 04:30:25,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:30:25,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930825111] [2023-01-28 04:30:25,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930825111] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:30:25,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949131104] [2023-01-28 04:30:25,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:30:25,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:25,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:30:25,171 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 04:30:25,172 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 04:30:25,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:30:25,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:30:25,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 04:30:25,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:30:25,415 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 04:30:25,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:30:25,498 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 04:30:25,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949131104] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:30:25,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:30:25,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-01-28 04:30:25,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289676519] [2023-01-28 04:30:25,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:30:25,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 04:30:25,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:30:25,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 04:30:25,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2023-01-28 04:30:25,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 268 [2023-01-28 04:30:25,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 632 transitions, 14460 flow. Second operand has 17 states, 17 states have (on average 96.88235294117646) internal successors, (1647), 17 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:25,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:30:25,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 268 [2023-01-28 04:30:25,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:30:28,187 INFO L130 PetriNetUnfolder]: 4483/6806 cut-off events. [2023-01-28 04:30:28,188 INFO L131 PetriNetUnfolder]: For 235197/235197 co-relation queries the response was YES. [2023-01-28 04:30:28,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78821 conditions, 6806 events. 4483/6806 cut-off events. For 235197/235197 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 38373 event pairs, 175 based on Foata normal form. 88/6894 useless extension candidates. Maximal degree in co-relation 78700. Up to 2577 conditions per place. [2023-01-28 04:30:28,258 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 572 selfloop transitions, 605 changer transitions 0/1177 dead transitions. [2023-01-28 04:30:28,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 1177 transitions, 27034 flow [2023-01-28 04:30:28,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 04:30:28,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 04:30:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3156 transitions. [2023-01-28 04:30:28,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37987481945113144 [2023-01-28 04:30:28,261 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3156 transitions. [2023-01-28 04:30:28,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3156 transitions. [2023-01-28 04:30:28,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:30:28,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3156 transitions. [2023-01-28 04:30:28,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 101.80645161290323) internal successors, (3156), 31 states have internal predecessors, (3156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:28,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 268.0) internal successors, (8576), 32 states have internal predecessors, (8576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:28,269 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 268.0) internal successors, (8576), 32 states have internal predecessors, (8576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:28,269 INFO L175 Difference]: Start difference. First operand has 334 places, 632 transitions, 14460 flow. Second operand 31 states and 3156 transitions. [2023-01-28 04:30:28,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 1177 transitions, 27034 flow [2023-01-28 04:30:29,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 1177 transitions, 25941 flow, removed 123 selfloop flow, removed 23 redundant places. [2023-01-28 04:30:29,140 INFO L231 Difference]: Finished difference. Result has 298 places, 863 transitions, 20386 flow [2023-01-28 04:30:29,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=13870, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=20386, PETRI_PLACES=298, PETRI_TRANSITIONS=863} [2023-01-28 04:30:29,141 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 268 predicate places. [2023-01-28 04:30:29,141 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 863 transitions, 20386 flow [2023-01-28 04:30:29,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 96.88235294117646) internal successors, (1647), 17 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:29,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:30:29,141 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:30:29,146 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 04:30:29,342 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,SelfDestructingSolverStorable43 [2023-01-28 04:30:29,342 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:30:29,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:30:29,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1753839264, now seen corresponding path program 11 times [2023-01-28 04:30:29,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:30:29,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898638102] [2023-01-28 04:30:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:30:29,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:30:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:30:29,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:30:29,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898638102] [2023-01-28 04:30:29,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898638102] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:30:29,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761214354] [2023-01-28 04:30:29,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:30:29,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:29,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:30:29,601 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 04:30:29,631 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 04:30:29,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:30:29,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:30:29,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:30:29,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:30:29,929 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 04:30:29,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:30:30,044 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 04:30:30,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761214354] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:30:30,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:30:30,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-28 04:30:30,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910643537] [2023-01-28 04:30:30,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:30:30,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:30:30,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:30:30,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:30:30,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-01-28 04:30:30,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:30:30,047 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 863 transitions, 20386 flow. Second operand has 20 states, 20 states have (on average 99.1) internal successors, (1982), 20 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:30,047 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:30:30,047 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:30:30,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:30:32,916 INFO L130 PetriNetUnfolder]: 5541/8471 cut-off events. [2023-01-28 04:30:32,917 INFO L131 PetriNetUnfolder]: For 312332/312371 co-relation queries the response was YES. [2023-01-28 04:30:32,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103071 conditions, 8471 events. 5541/8471 cut-off events. For 312332/312371 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 49593 event pairs, 475 based on Foata normal form. 77/8540 useless extension candidates. Maximal degree in co-relation 102953. Up to 3223 conditions per place. [2023-01-28 04:30:33,016 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 822 selfloop transitions, 379 changer transitions 0/1239 dead transitions. [2023-01-28 04:30:33,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 1239 transitions, 30110 flow [2023-01-28 04:30:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 04:30:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 04:30:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1910 transitions. [2023-01-28 04:30:33,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3959369817578773 [2023-01-28 04:30:33,018 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1910 transitions. [2023-01-28 04:30:33,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1910 transitions. [2023-01-28 04:30:33,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:30:33,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1910 transitions. [2023-01-28 04:30:33,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 106.11111111111111) internal successors, (1910), 18 states have internal predecessors, (1910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:33,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:33,023 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:33,024 INFO L175 Difference]: Start difference. First operand has 298 places, 863 transitions, 20386 flow. Second operand 18 states and 1910 transitions. [2023-01-28 04:30:33,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 1239 transitions, 30110 flow [2023-01-28 04:30:34,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 1239 transitions, 28353 flow, removed 474 selfloop flow, removed 13 redundant places. [2023-01-28 04:30:34,711 INFO L231 Difference]: Finished difference. Result has 307 places, 927 transitions, 21665 flow [2023-01-28 04:30:34,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=18939, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=860, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=318, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=21665, PETRI_PLACES=307, PETRI_TRANSITIONS=927} [2023-01-28 04:30:34,712 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 277 predicate places. [2023-01-28 04:30:34,712 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 927 transitions, 21665 flow [2023-01-28 04:30:34,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 99.1) internal successors, (1982), 20 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:34,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:30:34,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:30:34,717 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 04:30:34,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:34,913 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:30:34,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:30:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash -2058973118, now seen corresponding path program 18 times [2023-01-28 04:30:34,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:30:34,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521016719] [2023-01-28 04:30:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:30:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:30:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:30:35,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:30:35,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521016719] [2023-01-28 04:30:35,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521016719] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:30:35,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389083675] [2023-01-28 04:30:35,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:30:35,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:35,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:30:35,022 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 04:30:35,023 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 04:30:35,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:30:35,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:30:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:30:35,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:30:35,285 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 04:30:35,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:30:35,380 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 04:30:35,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389083675] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:30:35,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:30:35,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-28 04:30:35,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418081939] [2023-01-28 04:30:35,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:30:35,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:30:35,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:30:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:30:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:30:35,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:30:35,383 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 927 transitions, 21665 flow. Second operand has 18 states, 18 states have (on average 99.22222222222223) internal successors, (1786), 18 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:35,383 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:30:35,383 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:30:35,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:30:38,006 INFO L130 PetriNetUnfolder]: 5437/8282 cut-off events. [2023-01-28 04:30:38,006 INFO L131 PetriNetUnfolder]: For 313004/313026 co-relation queries the response was YES. [2023-01-28 04:30:38,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100784 conditions, 8282 events. 5437/8282 cut-off events. For 313004/313026 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 47894 event pairs, 518 based on Foata normal form. 82/8364 useless extension candidates. Maximal degree in co-relation 100663. Up to 3124 conditions per place. [2023-01-28 04:30:38,106 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 711 selfloop transitions, 408 changer transitions 0/1157 dead transitions. [2023-01-28 04:30:38,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 1157 transitions, 28146 flow [2023-01-28 04:30:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 04:30:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 04:30:38,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1161 transitions. [2023-01-28 04:30:38,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39382632293080055 [2023-01-28 04:30:38,108 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1161 transitions. [2023-01-28 04:30:38,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1161 transitions. [2023-01-28 04:30:38,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:30:38,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1161 transitions. [2023-01-28 04:30:38,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 105.54545454545455) internal successors, (1161), 11 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:38,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:38,111 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:38,111 INFO L175 Difference]: Start difference. First operand has 307 places, 927 transitions, 21665 flow. Second operand 11 states and 1161 transitions. [2023-01-28 04:30:38,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 1157 transitions, 28146 flow [2023-01-28 04:30:39,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1157 transitions, 27070 flow, removed 346 selfloop flow, removed 7 redundant places. [2023-01-28 04:30:39,978 INFO L231 Difference]: Finished difference. Result has 313 places, 954 transitions, 22654 flow [2023-01-28 04:30:39,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=20691, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=377, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22654, PETRI_PLACES=313, PETRI_TRANSITIONS=954} [2023-01-28 04:30:39,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2023-01-28 04:30:39,980 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 954 transitions, 22654 flow [2023-01-28 04:30:39,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.22222222222223) internal successors, (1786), 18 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:39,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:30:39,980 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:30:39,985 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 04:30:40,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:40,181 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:30:40,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:30:40,181 INFO L85 PathProgramCache]: Analyzing trace with hash 887196386, now seen corresponding path program 12 times [2023-01-28 04:30:40,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:30:40,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815697000] [2023-01-28 04:30:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:30:40,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:30:40,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:30:40,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:30:40,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815697000] [2023-01-28 04:30:40,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815697000] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:30:40,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884179853] [2023-01-28 04:30:40,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:30:40,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:30:40,295 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 04:30:40,296 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 04:30:40,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:30:40,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:30:40,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:30:40,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:30:40,582 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 04:30:40,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:30:40,675 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 04:30:40,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884179853] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:30:40,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:30:40,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-28 04:30:40,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512305363] [2023-01-28 04:30:40,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:30:40,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:30:40,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:30:40,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:30:40,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:30:40,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:30:40,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 954 transitions, 22654 flow. Second operand has 18 states, 18 states have (on average 99.0) internal successors, (1782), 18 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:40,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:30:40,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:30:40,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:30:43,239 INFO L130 PetriNetUnfolder]: 5405/8233 cut-off events. [2023-01-28 04:30:43,239 INFO L131 PetriNetUnfolder]: For 300804/300827 co-relation queries the response was YES. [2023-01-28 04:30:43,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99943 conditions, 8233 events. 5405/8233 cut-off events. For 300804/300827 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 47511 event pairs, 1165 based on Foata normal form. 33/8260 useless extension candidates. Maximal degree in co-relation 99820. Up to 5843 conditions per place. [2023-01-28 04:30:43,332 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 769 selfloop transitions, 227 changer transitions 0/1034 dead transitions. [2023-01-28 04:30:43,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1034 transitions, 25932 flow [2023-01-28 04:30:43,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:30:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:30:43,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 941 transitions. [2023-01-28 04:30:43,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3901326699834162 [2023-01-28 04:30:43,333 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 941 transitions. [2023-01-28 04:30:43,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 941 transitions. [2023-01-28 04:30:43,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:30:43,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 941 transitions. [2023-01-28 04:30:43,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.55555555555556) internal successors, (941), 9 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:43,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:43,336 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:43,336 INFO L175 Difference]: Start difference. First operand has 313 places, 954 transitions, 22654 flow. Second operand 9 states and 941 transitions. [2023-01-28 04:30:43,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1034 transitions, 25932 flow [2023-01-28 04:30:44,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 1034 transitions, 25288 flow, removed 195 selfloop flow, removed 6 redundant places. [2023-01-28 04:30:44,950 INFO L231 Difference]: Finished difference. Result has 315 places, 951 transitions, 22465 flow [2023-01-28 04:30:44,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=21925, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=948, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=721, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22465, PETRI_PLACES=315, PETRI_TRANSITIONS=951} [2023-01-28 04:30:44,951 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 285 predicate places. [2023-01-28 04:30:44,951 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 951 transitions, 22465 flow [2023-01-28 04:30:44,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.0) internal successors, (1782), 18 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:44,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:30:44,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:30:45,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-01-28 04:30:45,151 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,SelfDestructingSolverStorable46 [2023-01-28 04:30:45,152 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:30:45,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:30:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1282113470, now seen corresponding path program 19 times [2023-01-28 04:30:45,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:30:45,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407252206] [2023-01-28 04:30:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:30:45,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:30:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:30:45,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:30:45,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407252206] [2023-01-28 04:30:45,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407252206] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:30:45,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862990438] [2023-01-28 04:30:45,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:30:45,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:45,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:30:45,261 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 04:30:45,266 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 04:30:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:45,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:30:45,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:30:45,510 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 04:30:45,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:30:45,609 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 04:30:45,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862990438] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:30:45,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:30:45,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 04:30:45,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69709963] [2023-01-28 04:30:45,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:30:45,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 04:30:45,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:30:45,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 04:30:45,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-28 04:30:45,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:30:45,612 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 951 transitions, 22465 flow. Second operand has 19 states, 19 states have (on average 99.10526315789474) internal successors, (1883), 19 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:45,612 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:30:45,612 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:30:45,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:30:48,051 INFO L130 PetriNetUnfolder]: 5211/7883 cut-off events. [2023-01-28 04:30:48,052 INFO L131 PetriNetUnfolder]: For 290058/290067 co-relation queries the response was YES. [2023-01-28 04:30:48,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95204 conditions, 7883 events. 5211/7883 cut-off events. For 290058/290067 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 44473 event pairs, 554 based on Foata normal form. 141/8024 useless extension candidates. Maximal degree in co-relation 95080. Up to 2938 conditions per place. [2023-01-28 04:30:48,146 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 593 selfloop transitions, 497 changer transitions 0/1124 dead transitions. [2023-01-28 04:30:48,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 1124 transitions, 27224 flow [2023-01-28 04:30:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 04:30:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 04:30:48,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1375 transitions. [2023-01-28 04:30:48,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39466130884041334 [2023-01-28 04:30:48,148 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1375 transitions. [2023-01-28 04:30:48,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1375 transitions. [2023-01-28 04:30:48,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:30:48,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1375 transitions. [2023-01-28 04:30:48,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 105.76923076923077) internal successors, (1375), 13 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:48,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:48,152 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:48,152 INFO L175 Difference]: Start difference. First operand has 315 places, 951 transitions, 22465 flow. Second operand 13 states and 1375 transitions. [2023-01-28 04:30:48,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 1124 transitions, 27224 flow [2023-01-28 04:30:49,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 1124 transitions, 26458 flow, removed 72 selfloop flow, removed 8 redundant places. [2023-01-28 04:30:49,784 INFO L231 Difference]: Finished difference. Result has 321 places, 951 transitions, 22866 flow [2023-01-28 04:30:49,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=21111, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=923, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=22866, PETRI_PLACES=321, PETRI_TRANSITIONS=951} [2023-01-28 04:30:49,785 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 291 predicate places. [2023-01-28 04:30:49,785 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 951 transitions, 22866 flow [2023-01-28 04:30:49,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 99.10526315789474) internal successors, (1883), 19 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:49,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:30:49,785 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:30:49,790 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 04:30:49,985 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,SelfDestructingSolverStorable47 [2023-01-28 04:30:49,986 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:30:49,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:30:49,986 INFO L85 PathProgramCache]: Analyzing trace with hash 210769146, now seen corresponding path program 13 times [2023-01-28 04:30:49,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:30:49,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339787218] [2023-01-28 04:30:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:30:49,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:30:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:50,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:30:50,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:30:50,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339787218] [2023-01-28 04:30:50,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339787218] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:30:50,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740447867] [2023-01-28 04:30:50,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:30:50,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:50,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:30:50,097 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:30:50,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-28 04:30:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:50,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:30:50,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:30:50,362 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 04:30:50,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:30:50,471 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 04:30:50,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740447867] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:30:50,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:30:50,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 04:30:50,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48240935] [2023-01-28 04:30:50,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:30:50,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 04:30:50,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:30:50,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 04:30:50,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-28 04:30:50,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:30:50,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 951 transitions, 22866 flow. Second operand has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:50,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:30:50,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:30:50,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:30:52,992 INFO L130 PetriNetUnfolder]: 5186/7824 cut-off events. [2023-01-28 04:30:52,992 INFO L131 PetriNetUnfolder]: For 289753/289774 co-relation queries the response was YES. [2023-01-28 04:30:53,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95526 conditions, 7824 events. 5186/7824 cut-off events. For 289753/289774 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 43887 event pairs, 1107 based on Foata normal form. 25/7844 useless extension candidates. Maximal degree in co-relation 95400. Up to 5565 conditions per place. [2023-01-28 04:30:53,083 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 761 selfloop transitions, 231 changer transitions 0/1026 dead transitions. [2023-01-28 04:30:53,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 1026 transitions, 25981 flow [2023-01-28 04:30:53,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:30:53,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:30:53,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 942 transitions. [2023-01-28 04:30:53,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39054726368159204 [2023-01-28 04:30:53,084 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 942 transitions. [2023-01-28 04:30:53,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 942 transitions. [2023-01-28 04:30:53,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:30:53,085 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 942 transitions. [2023-01-28 04:30:53,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.66666666666667) internal successors, (942), 9 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:53,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:53,087 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:53,087 INFO L175 Difference]: Start difference. First operand has 321 places, 951 transitions, 22866 flow. Second operand 9 states and 942 transitions. [2023-01-28 04:30:53,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 1026 transitions, 25981 flow [2023-01-28 04:30:54,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1026 transitions, 25155 flow, removed 65 selfloop flow, removed 8 redundant places. [2023-01-28 04:30:54,693 INFO L231 Difference]: Finished difference. Result has 322 places, 954 transitions, 22583 flow [2023-01-28 04:30:54,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22017, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=950, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=719, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22583, PETRI_PLACES=322, PETRI_TRANSITIONS=954} [2023-01-28 04:30:54,694 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2023-01-28 04:30:54,694 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 954 transitions, 22583 flow [2023-01-28 04:30:54,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:54,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:30:54,694 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:30:54,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-28 04:30:54,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-28 04:30:54,901 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:30:54,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:30:54,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1372642600, now seen corresponding path program 14 times [2023-01-28 04:30:54,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:30:54,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049327077] [2023-01-28 04:30:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:30:54,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:30:54,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:30:55,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:30:55,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049327077] [2023-01-28 04:30:55,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049327077] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:30:55,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628442221] [2023-01-28 04:30:55,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:30:55,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:55,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:30:55,006 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:30:55,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-28 04:30:55,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:30:55,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:30:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:30:55,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:30:55,248 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 04:30:55,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:30:55,359 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 04:30:55,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628442221] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:30:55,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:30:55,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 04:30:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541818086] [2023-01-28 04:30:55,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:30:55,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 04:30:55,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:30:55,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 04:30:55,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-28 04:30:55,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:30:55,362 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 954 transitions, 22583 flow. Second operand has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:55,362 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:30:55,362 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:30:55,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:30:57,792 INFO L130 PetriNetUnfolder]: 5167/7805 cut-off events. [2023-01-28 04:30:57,792 INFO L131 PetriNetUnfolder]: For 279248/279264 co-relation queries the response was YES. [2023-01-28 04:30:57,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94349 conditions, 7805 events. 5167/7805 cut-off events. For 279248/279264 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 43857 event pairs, 587 based on Foata normal form. 34/7835 useless extension candidates. Maximal degree in co-relation 94222. Up to 2927 conditions per place. [2023-01-28 04:30:58,025 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 796 selfloop transitions, 338 changer transitions 0/1168 dead transitions. [2023-01-28 04:30:58,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 1168 transitions, 28865 flow [2023-01-28 04:30:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 04:30:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 04:30:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1153 transitions. [2023-01-28 04:30:58,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39111261872455905 [2023-01-28 04:30:58,026 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1153 transitions. [2023-01-28 04:30:58,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1153 transitions. [2023-01-28 04:30:58,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:30:58,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1153 transitions. [2023-01-28 04:30:58,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 104.81818181818181) internal successors, (1153), 11 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:58,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:58,029 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:58,029 INFO L175 Difference]: Start difference. First operand has 322 places, 954 transitions, 22583 flow. Second operand 11 states and 1153 transitions. [2023-01-28 04:30:58,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 1168 transitions, 28865 flow [2023-01-28 04:30:59,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1168 transitions, 28580 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-01-28 04:30:59,509 INFO L231 Difference]: Finished difference. Result has 327 places, 958 transitions, 23105 flow [2023-01-28 04:30:59,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22267, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=952, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23105, PETRI_PLACES=327, PETRI_TRANSITIONS=958} [2023-01-28 04:30:59,510 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 297 predicate places. [2023-01-28 04:30:59,510 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 958 transitions, 23105 flow [2023-01-28 04:30:59,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:30:59,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:30:59,510 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:30:59,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-01-28 04:30:59,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:59,711 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:30:59,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:30:59,711 INFO L85 PathProgramCache]: Analyzing trace with hash -339315580, now seen corresponding path program 15 times [2023-01-28 04:30:59,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:30:59,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672820209] [2023-01-28 04:30:59,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:30:59,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:30:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:30:59,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:30:59,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:30:59,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672820209] [2023-01-28 04:30:59,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672820209] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:30:59,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582241765] [2023-01-28 04:30:59,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:30:59,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:30:59,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:30:59,849 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:30:59,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-28 04:31:00,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:31:00,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:31:00,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:31:00,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:31:00,133 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 04:31:00,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:31:00,254 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 04:31:00,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582241765] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:31:00,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:31:00,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-28 04:31:00,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841677102] [2023-01-28 04:31:00,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:31:00,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 04:31:00,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:31:00,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 04:31:00,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-01-28 04:31:00,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:31:00,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 958 transitions, 23105 flow. Second operand has 21 states, 21 states have (on average 98.85714285714286) internal successors, (2076), 21 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:00,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:31:00,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:31:00,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:31:03,074 INFO L130 PetriNetUnfolder]: 5102/7678 cut-off events. [2023-01-28 04:31:03,075 INFO L131 PetriNetUnfolder]: For 283525/283541 co-relation queries the response was YES. [2023-01-28 04:31:03,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94115 conditions, 7678 events. 5102/7678 cut-off events. For 283525/283541 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42862 event pairs, 478 based on Foata normal form. 82/7756 useless extension candidates. Maximal degree in co-relation 93987. Up to 2867 conditions per place. [2023-01-28 04:31:03,171 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 801 selfloop transitions, 409 changer transitions 0/1244 dead transitions. [2023-01-28 04:31:03,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1244 transitions, 30759 flow [2023-01-28 04:31:03,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 04:31:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 04:31:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1801 transitions. [2023-01-28 04:31:03,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953028972783143 [2023-01-28 04:31:03,173 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1801 transitions. [2023-01-28 04:31:03,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1801 transitions. [2023-01-28 04:31:03,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:31:03,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1801 transitions. [2023-01-28 04:31:03,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 105.94117647058823) internal successors, (1801), 17 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:03,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:03,177 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:03,177 INFO L175 Difference]: Start difference. First operand has 327 places, 958 transitions, 23105 flow. Second operand 17 states and 1801 transitions. [2023-01-28 04:31:03,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1244 transitions, 30759 flow [2023-01-28 04:31:04,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 1244 transitions, 30311 flow, removed 22 selfloop flow, removed 7 redundant places. [2023-01-28 04:31:04,852 INFO L231 Difference]: Finished difference. Result has 337 places, 959 transitions, 23653 flow [2023-01-28 04:31:04,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22562, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=953, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=23653, PETRI_PLACES=337, PETRI_TRANSITIONS=959} [2023-01-28 04:31:04,853 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 307 predicate places. [2023-01-28 04:31:04,853 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 959 transitions, 23653 flow [2023-01-28 04:31:04,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.85714285714286) internal successors, (2076), 21 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:04,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:31:04,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:31:04,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-28 04:31:05,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:31:05,054 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:31:05,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:31:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash -932140466, now seen corresponding path program 16 times [2023-01-28 04:31:05,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:31:05,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23680860] [2023-01-28 04:31:05,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:31:05,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:31:05,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:31:05,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:31:05,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:31:05,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23680860] [2023-01-28 04:31:05,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23680860] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:31:05,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360502848] [2023-01-28 04:31:05,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:31:05,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:31:05,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:31:05,181 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:31:05,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-28 04:31:05,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:31:05,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:31:05,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:31:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:31:05,519 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 04:31:05,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:31:05,662 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 04:31:05,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360502848] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:31:05,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:31:05,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 04:31:05,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843368686] [2023-01-28 04:31:05,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:31:05,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 04:31:05,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:31:05,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 04:31:05,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-01-28 04:31:05,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:31:05,665 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 959 transitions, 23653 flow. Second operand has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:05,665 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:31:05,665 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:31:05,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:31:08,202 INFO L130 PetriNetUnfolder]: 5072/7618 cut-off events. [2023-01-28 04:31:08,202 INFO L131 PetriNetUnfolder]: For 289137/289147 co-relation queries the response was YES. [2023-01-28 04:31:08,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94555 conditions, 7618 events. 5072/7618 cut-off events. For 289137/289147 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 42162 event pairs, 965 based on Foata normal form. 22/7636 useless extension candidates. Maximal degree in co-relation 94425. Up to 4608 conditions per place. [2023-01-28 04:31:08,296 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 721 selfloop transitions, 309 changer transitions 0/1064 dead transitions. [2023-01-28 04:31:08,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 1064 transitions, 27355 flow [2023-01-28 04:31:08,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:31:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:31:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 938 transitions. [2023-01-28 04:31:08,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-01-28 04:31:08,297 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 938 transitions. [2023-01-28 04:31:08,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 938 transitions. [2023-01-28 04:31:08,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:31:08,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 938 transitions. [2023-01-28 04:31:08,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.22222222222223) internal successors, (938), 9 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:08,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:08,300 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:08,300 INFO L175 Difference]: Start difference. First operand has 337 places, 959 transitions, 23653 flow. Second operand 9 states and 938 transitions. [2023-01-28 04:31:08,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 1064 transitions, 27355 flow [2023-01-28 04:31:09,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1064 transitions, 26789 flow, removed 39 selfloop flow, removed 12 redundant places. [2023-01-28 04:31:09,966 INFO L231 Difference]: Finished difference. Result has 334 places, 960 transitions, 23732 flow [2023-01-28 04:31:09,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=23063, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=23732, PETRI_PLACES=334, PETRI_TRANSITIONS=960} [2023-01-28 04:31:09,967 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2023-01-28 04:31:09,967 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 960 transitions, 23732 flow [2023-01-28 04:31:09,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 99.05263157894737) internal successors, (1882), 19 states have internal predecessors, (1882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:09,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:31:09,967 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:31:09,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-28 04:31:10,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:31:10,168 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:31:10,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:31:10,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1031126796, now seen corresponding path program 20 times [2023-01-28 04:31:10,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:31:10,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277428500] [2023-01-28 04:31:10,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:31:10,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:31:10,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:31:10,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:31:10,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:31:10,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277428500] [2023-01-28 04:31:10,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277428500] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:31:10,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399238155] [2023-01-28 04:31:10,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:31:10,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:31:10,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:31:10,278 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:31:10,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-28 04:31:10,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:31:10,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:31:10,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:31:10,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:31:10,569 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 04:31:10,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:31:10,691 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 04:31:10,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399238155] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:31:10,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:31:10,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-28 04:31:10,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107862374] [2023-01-28 04:31:10,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:31:10,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 04:31:10,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:31:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 04:31:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-01-28 04:31:10,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:31:10,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 960 transitions, 23732 flow. Second operand has 20 states, 20 states have (on average 98.9) internal successors, (1978), 20 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:10,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:31:10,695 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:31:10,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:31:13,081 INFO L130 PetriNetUnfolder]: 5039/7585 cut-off events. [2023-01-28 04:31:13,081 INFO L131 PetriNetUnfolder]: For 286907/286917 co-relation queries the response was YES. [2023-01-28 04:31:13,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93824 conditions, 7585 events. 5039/7585 cut-off events. For 286907/286917 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 42148 event pairs, 975 based on Foata normal form. 38/7619 useless extension candidates. Maximal degree in co-relation 93694. Up to 4668 conditions per place. [2023-01-28 04:31:13,321 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 739 selfloop transitions, 321 changer transitions 0/1094 dead transitions. [2023-01-28 04:31:13,321 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1094 transitions, 28132 flow [2023-01-28 04:31:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:31:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:31:13,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 936 transitions. [2023-01-28 04:31:13,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880597014925373 [2023-01-28 04:31:13,322 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 936 transitions. [2023-01-28 04:31:13,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 936 transitions. [2023-01-28 04:31:13,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:31:13,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 936 transitions. [2023-01-28 04:31:13,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:13,325 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:13,325 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:13,325 INFO L175 Difference]: Start difference. First operand has 334 places, 960 transitions, 23732 flow. Second operand 9 states and 936 transitions. [2023-01-28 04:31:13,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1094 transitions, 28132 flow [2023-01-28 04:31:14,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1094 transitions, 27507 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-28 04:31:14,851 INFO L231 Difference]: Finished difference. Result has 335 places, 971 transitions, 24078 flow [2023-01-28 04:31:14,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=23019, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=306, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24078, PETRI_PLACES=335, PETRI_TRANSITIONS=971} [2023-01-28 04:31:14,852 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 305 predicate places. [2023-01-28 04:31:14,852 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 971 transitions, 24078 flow [2023-01-28 04:31:14,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.9) internal successors, (1978), 20 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:14,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:31:14,853 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:31:14,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-28 04:31:15,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-01-28 04:31:15,058 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:31:15,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:31:15,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1977209790, now seen corresponding path program 21 times [2023-01-28 04:31:15,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:31:15,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318170368] [2023-01-28 04:31:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:31:15,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:31:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:31:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:31:15,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:31:15,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318170368] [2023-01-28 04:31:15,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318170368] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:31:15,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381216141] [2023-01-28 04:31:15,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:31:15,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:31:15,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:31:15,158 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:31:15,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-28 04:31:15,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:31:15,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:31:15,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:31:15,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:31:15,419 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 04:31:15,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:31:15,523 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 04:31:15,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381216141] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:31:15,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:31:15,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-01-28 04:31:15,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802460987] [2023-01-28 04:31:15,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:31:15,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 04:31:15,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:31:15,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 04:31:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-01-28 04:31:15,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-01-28 04:31:15,525 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 971 transitions, 24078 flow. Second operand has 18 states, 18 states have (on average 99.11111111111111) internal successors, (1784), 18 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:15,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:31:15,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-01-28 04:31:15,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:31:18,085 INFO L130 PetriNetUnfolder]: 4995/7501 cut-off events. [2023-01-28 04:31:18,085 INFO L131 PetriNetUnfolder]: For 285094/285104 co-relation queries the response was YES. [2023-01-28 04:31:18,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93136 conditions, 7501 events. 4995/7501 cut-off events. For 285094/285104 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 41369 event pairs, 970 based on Foata normal form. 38/7535 useless extension candidates. Maximal degree in co-relation 93006. Up to 4668 conditions per place. [2023-01-28 04:31:18,168 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 785 selfloop transitions, 306 changer transitions 0/1125 dead transitions. [2023-01-28 04:31:18,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1125 transitions, 28911 flow [2023-01-28 04:31:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 04:31:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 04:31:18,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 935 transitions. [2023-01-28 04:31:18,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3876451077943615 [2023-01-28 04:31:18,170 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 935 transitions. [2023-01-28 04:31:18,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 935 transitions. [2023-01-28 04:31:18,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:31:18,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 935 transitions. [2023-01-28 04:31:18,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 103.88888888888889) internal successors, (935), 9 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:18,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:18,172 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:18,172 INFO L175 Difference]: Start difference. First operand has 335 places, 971 transitions, 24078 flow. Second operand 9 states and 935 transitions. [2023-01-28 04:31:18,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1125 transitions, 28911 flow [2023-01-28 04:31:19,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1125 transitions, 28649 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-01-28 04:31:19,654 INFO L231 Difference]: Finished difference. Result has 339 places, 982 transitions, 24796 flow [2023-01-28 04:31:19,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=23738, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24796, PETRI_PLACES=339, PETRI_TRANSITIONS=982} [2023-01-28 04:31:19,654 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 309 predicate places. [2023-01-28 04:31:19,655 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 982 transitions, 24796 flow [2023-01-28 04:31:19,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.11111111111111) internal successors, (1784), 18 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:19,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:31:19,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:31:19,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-28 04:31:19,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-01-28 04:31:19,856 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:31:19,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:31:19,856 INFO L85 PathProgramCache]: Analyzing trace with hash 905128863, now seen corresponding path program 7 times [2023-01-28 04:31:19,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:31:19,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641112085] [2023-01-28 04:31:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:31:19,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:31:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:31:20,681 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 04:31:20,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:31:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641112085] [2023-01-28 04:31:20,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641112085] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:31:20,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790937955] [2023-01-28 04:31:20,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:31:20,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:31:20,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:31:20,682 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:31:20,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-01-28 04:31:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:31:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 85 conjunts are in the unsatisfiable core [2023-01-28 04:31:20,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:31:21,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:31:21,159 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 20 treesize of output 20 [2023-01-28 04:31:21,344 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:31:21,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:31:21,349 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:31:21,349 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 29 treesize of output 14 [2023-01-28 04:31:21,365 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 04:31:21,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:31:21,666 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2427 (Array Int Int)) (|v_thread3Thread1of1ForFork0_~i~2#1_165| Int)) (or (= (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2427) c_~A~0.base))) (+ (select .cse0 (+ c_~A~0.offset (* |v_thread3Thread1of1ForFork0_~i~2#1_165| 4))) c_~res2~0 (select .cse0 c_~A~0.offset))) c_~res1~0) (< |v_thread3Thread1of1ForFork0_~i~2#1_165| 1) (<= c_~N~0 |v_thread3Thread1of1ForFork0_~i~2#1_165|))) is different from false [2023-01-28 04:31:21,828 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 04:31:21,829 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 82 treesize of output 72 [2023-01-28 04:31:21,839 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 04:31:21,840 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 21 treesize of output 13 [2023-01-28 04:31:22,211 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 04:31:22,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790937955] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:31:22,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:31:22,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-01-28 04:31:22,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292542094] [2023-01-28 04:31:22,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:31:22,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 04:31:22,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:31:22,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 04:31:22,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1051, Unknown=4, NotChecked=66, Total=1260 [2023-01-28 04:31:22,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 268 [2023-01-28 04:31:22,214 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 982 transitions, 24796 flow. Second operand has 36 states, 36 states have (on average 76.72222222222223) internal successors, (2762), 36 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:22,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:31:22,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 268 [2023-01-28 04:31:22,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:31:27,867 INFO L130 PetriNetUnfolder]: 6951/10370 cut-off events. [2023-01-28 04:31:27,867 INFO L131 PetriNetUnfolder]: For 424132/424132 co-relation queries the response was YES. [2023-01-28 04:31:27,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133701 conditions, 10370 events. 6951/10370 cut-off events. For 424132/424132 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 59438 event pairs, 387 based on Foata normal form. 3/10373 useless extension candidates. Maximal degree in co-relation 133570. Up to 7009 conditions per place. [2023-01-28 04:31:27,995 INFO L137 encePairwiseOnDemand]: 254/268 looper letters, 894 selfloop transitions, 684 changer transitions 4/1582 dead transitions. [2023-01-28 04:31:27,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1582 transitions, 43957 flow [2023-01-28 04:31:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 04:31:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 04:31:27,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2205 transitions. [2023-01-28 04:31:27,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31644661308840416 [2023-01-28 04:31:27,997 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2205 transitions. [2023-01-28 04:31:27,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2205 transitions. [2023-01-28 04:31:27,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:31:27,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2205 transitions. [2023-01-28 04:31:28,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 84.8076923076923) internal successors, (2205), 26 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:28,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 268.0) internal successors, (7236), 27 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:28,004 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 268.0) internal successors, (7236), 27 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:28,004 INFO L175 Difference]: Start difference. First operand has 339 places, 982 transitions, 24796 flow. Second operand 26 states and 2205 transitions. [2023-01-28 04:31:28,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1582 transitions, 43957 flow [2023-01-28 04:31:31,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1582 transitions, 42983 flow, removed 16 selfloop flow, removed 7 redundant places. [2023-01-28 04:31:31,070 INFO L231 Difference]: Finished difference. Result has 372 places, 1361 transitions, 39268 flow [2023-01-28 04:31:31,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=24184, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=982, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=39268, PETRI_PLACES=372, PETRI_TRANSITIONS=1361} [2023-01-28 04:31:31,071 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 342 predicate places. [2023-01-28 04:31:31,071 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 1361 transitions, 39268 flow [2023-01-28 04:31:31,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 76.72222222222223) internal successors, (2762), 36 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:31,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:31:31,071 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:31:31,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-01-28 04:31:31,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:31:31,272 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:31:31,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:31:31,272 INFO L85 PathProgramCache]: Analyzing trace with hash 263414407, now seen corresponding path program 8 times [2023-01-28 04:31:31,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:31:31,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757149432] [2023-01-28 04:31:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:31:31,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:31:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:31:32,101 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 04:31:32,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:31:32,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757149432] [2023-01-28 04:31:32,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757149432] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:31:32,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710838108] [2023-01-28 04:31:32,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:31:32,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:31:32,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:31:32,105 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:31:32,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-01-28 04:31:32,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:31:32,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:31:32,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 81 conjunts are in the unsatisfiable core [2023-01-28 04:31:32,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:31:32,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:31:32,788 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 29 treesize of output 27 [2023-01-28 04:31:33,072 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 04:31:33,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:31:33,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:31:33,623 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 38 treesize of output 54 [2023-01-28 04:31:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:31:33,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710838108] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:31:33,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:31:33,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 34 [2023-01-28 04:31:33,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6520130] [2023-01-28 04:31:33,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:31:33,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 04:31:33,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:31:33,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 04:31:33,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2023-01-28 04:31:33,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-28 04:31:33,952 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1361 transitions, 39268 flow. Second operand has 36 states, 36 states have (on average 81.05555555555556) internal successors, (2918), 36 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:33,952 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:31:33,952 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-28 04:31:33,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:31:45,059 INFO L130 PetriNetUnfolder]: 9616/14529 cut-off events. [2023-01-28 04:31:45,059 INFO L131 PetriNetUnfolder]: For 737634/737634 co-relation queries the response was YES. [2023-01-28 04:31:45,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193016 conditions, 14529 events. 9616/14529 cut-off events. For 737634/737634 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 89915 event pairs, 729 based on Foata normal form. 6/14535 useless extension candidates. Maximal degree in co-relation 192871. Up to 10159 conditions per place. [2023-01-28 04:31:45,242 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1292 selfloop transitions, 808 changer transitions 7/2107 dead transitions. [2023-01-28 04:31:45,242 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 2107 transitions, 60448 flow [2023-01-28 04:31:45,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-01-28 04:31:45,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-01-28 04:31:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4765 transitions. [2023-01-28 04:31:45,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32925649530127143 [2023-01-28 04:31:45,245 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4765 transitions. [2023-01-28 04:31:45,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4765 transitions. [2023-01-28 04:31:45,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:31:45,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4765 transitions. [2023-01-28 04:31:45,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 88.24074074074075) internal successors, (4765), 54 states have internal predecessors, (4765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:45,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 268.0) internal successors, (14740), 55 states have internal predecessors, (14740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:45,255 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 268.0) internal successors, (14740), 55 states have internal predecessors, (14740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:45,255 INFO L175 Difference]: Start difference. First operand has 372 places, 1361 transitions, 39268 flow. Second operand 54 states and 4765 transitions. [2023-01-28 04:31:45,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 2107 transitions, 60448 flow [2023-01-28 04:31:51,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 2107 transitions, 56614 flow, removed 1915 selfloop flow, removed 2 redundant places. [2023-01-28 04:31:51,980 INFO L231 Difference]: Finished difference. Result has 450 places, 1725 transitions, 49711 flow [2023-01-28 04:31:51,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=37414, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=502, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=765, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=49711, PETRI_PLACES=450, PETRI_TRANSITIONS=1725} [2023-01-28 04:31:51,981 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 420 predicate places. [2023-01-28 04:31:51,981 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1725 transitions, 49711 flow [2023-01-28 04:31:51,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 81.05555555555556) internal successors, (2918), 36 states have internal predecessors, (2918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:51,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:31:51,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:31:51,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-01-28 04:31:52,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-28 04:31:52,182 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:31:52,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:31:52,183 INFO L85 PathProgramCache]: Analyzing trace with hash 2055933745, now seen corresponding path program 9 times [2023-01-28 04:31:52,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:31:52,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117863443] [2023-01-28 04:31:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:31:52,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:31:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:31:52,824 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 04:31:52,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:31:52,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117863443] [2023-01-28 04:31:52,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117863443] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:31:52,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054953335] [2023-01-28 04:31:52,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 04:31:52,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:31:52,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:31:52,827 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:31:52,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-01-28 04:31:53,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 04:31:53,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:31:53,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-28 04:31:53,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:31:53,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:31:53,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:31:53,404 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 29 treesize of output 19 [2023-01-28 04:31:53,454 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 04:31:53,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:31:53,934 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 04:31:53,934 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 38 treesize of output 46 [2023-01-28 04:31:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:31:54,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054953335] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:31:54,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:31:54,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 28 [2023-01-28 04:31:54,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818259982] [2023-01-28 04:31:54,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:31:54,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 04:31:54,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:31:54,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 04:31:54,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-01-28 04:31:54,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-28 04:31:54,052 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1725 transitions, 49711 flow. Second operand has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:31:54,052 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:31:54,052 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-28 04:31:54,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:32:05,744 INFO L130 PetriNetUnfolder]: 10715/16495 cut-off events. [2023-01-28 04:32:05,745 INFO L131 PetriNetUnfolder]: For 791514/791514 co-relation queries the response was YES. [2023-01-28 04:32:05,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214211 conditions, 16495 events. 10715/16495 cut-off events. For 791514/791514 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 108112 event pairs, 472 based on Foata normal form. 2/16497 useless extension candidates. Maximal degree in co-relation 214038. Up to 11141 conditions per place. [2023-01-28 04:32:05,984 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1173 selfloop transitions, 1091 changer transitions 2/2266 dead transitions. [2023-01-28 04:32:05,984 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 2266 transitions, 65045 flow [2023-01-28 04:32:05,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-01-28 04:32:05,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-01-28 04:32:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4377 transitions. [2023-01-28 04:32:05,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32664179104477614 [2023-01-28 04:32:05,987 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4377 transitions. [2023-01-28 04:32:05,987 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4377 transitions. [2023-01-28 04:32:05,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:32:05,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4377 transitions. [2023-01-28 04:32:05,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 87.54) internal successors, (4377), 50 states have internal predecessors, (4377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:32:05,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 268.0) internal successors, (13668), 51 states have internal predecessors, (13668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:32:05,996 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 268.0) internal successors, (13668), 51 states have internal predecessors, (13668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:32:05,996 INFO L175 Difference]: Start difference. First operand has 450 places, 1725 transitions, 49711 flow. Second operand 50 states and 4377 transitions. [2023-01-28 04:32:05,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 2266 transitions, 65045 flow [2023-01-28 04:32:16,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 2266 transitions, 60421 flow, removed 2058 selfloop flow, removed 10 redundant places. [2023-01-28 04:32:16,399 INFO L231 Difference]: Finished difference. Result has 510 places, 2014 transitions, 56371 flow [2023-01-28 04:32:16,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=46089, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=821, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=785, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=56371, PETRI_PLACES=510, PETRI_TRANSITIONS=2014} [2023-01-28 04:32:16,401 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 480 predicate places. [2023-01-28 04:32:16,401 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 2014 transitions, 56371 flow [2023-01-28 04:32:16,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.23333333333333) internal successors, (2437), 30 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:32:16,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:32:16,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:32:16,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-01-28 04:32:16,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-01-28 04:32:16,609 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:32:16,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:32:16,609 INFO L85 PathProgramCache]: Analyzing trace with hash -99943325, now seen corresponding path program 10 times [2023-01-28 04:32:16,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:32:16,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098799192] [2023-01-28 04:32:16,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:32:16,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:32:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:32:17,255 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 04:32:17,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:32:17,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098799192] [2023-01-28 04:32:17,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098799192] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:32:17,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383806155] [2023-01-28 04:32:17,255 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:32:17,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:32:17,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:32:17,256 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:32:17,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-01-28 04:32:17,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:32:17,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:32:17,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 83 conjunts are in the unsatisfiable core [2023-01-28 04:32:17,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:32:17,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:32:17,936 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 29 treesize of output 27 [2023-01-28 04:32:18,057 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 04:32:18,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:32:18,409 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:32:18,409 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 38 treesize of output 54 [2023-01-28 04:32:18,793 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 04:32:18,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383806155] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:32:18,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:32:18,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-28 04:32:18,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552583970] [2023-01-28 04:32:18,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:32:18,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 04:32:18,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:32:18,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 04:32:18,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 04:32:18,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-28 04:32:18,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 2014 transitions, 56371 flow. Second operand has 33 states, 33 states have (on average 81.12121212121212) internal successors, (2677), 33 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:32:18,797 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:32:18,797 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-28 04:32:18,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:32:30,534 INFO L130 PetriNetUnfolder]: 11478/17631 cut-off events. [2023-01-28 04:32:30,534 INFO L131 PetriNetUnfolder]: For 792203/792203 co-relation queries the response was YES. [2023-01-28 04:32:30,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225850 conditions, 17631 events. 11478/17631 cut-off events. For 792203/792203 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 115869 event pairs, 1015 based on Foata normal form. 2/17633 useless extension candidates. Maximal degree in co-relation 225657. Up to 15001 conditions per place. [2023-01-28 04:32:30,791 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1656 selfloop transitions, 634 changer transitions 1/2291 dead transitions. [2023-01-28 04:32:30,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 2291 transitions, 67241 flow [2023-01-28 04:32:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 04:32:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 04:32:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2364 transitions. [2023-01-28 04:32:30,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32669983416252074 [2023-01-28 04:32:30,793 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2364 transitions. [2023-01-28 04:32:30,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2364 transitions. [2023-01-28 04:32:30,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:32:30,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2364 transitions. [2023-01-28 04:32:30,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 87.55555555555556) internal successors, (2364), 27 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:32:30,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 268.0) internal successors, (7504), 28 states have internal predecessors, (7504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:32:30,798 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 268.0) internal successors, (7504), 28 states have internal predecessors, (7504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:32:30,798 INFO L175 Difference]: Start difference. First operand has 510 places, 2014 transitions, 56371 flow. Second operand 27 states and 2364 transitions. [2023-01-28 04:32:30,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 2291 transitions, 67241 flow [2023-01-28 04:32:42,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 2291 transitions, 65164 flow, removed 646 selfloop flow, removed 13 redundant places. [2023-01-28 04:32:42,095 INFO L231 Difference]: Finished difference. Result has 534 places, 2154 transitions, 60194 flow [2023-01-28 04:32:42,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=54408, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2014, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=518, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=60194, PETRI_PLACES=534, PETRI_TRANSITIONS=2154} [2023-01-28 04:32:42,097 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 504 predicate places. [2023-01-28 04:32:42,097 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 2154 transitions, 60194 flow [2023-01-28 04:32:42,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 81.12121212121212) internal successors, (2677), 33 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:32:42,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:32:42,098 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:32:42,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-01-28 04:32:42,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:32:42,306 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:32:42,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:32:42,306 INFO L85 PathProgramCache]: Analyzing trace with hash 985474141, now seen corresponding path program 11 times [2023-01-28 04:32:42,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:32:42,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102348175] [2023-01-28 04:32:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:32:42,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:32:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:32:42,924 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 04:32:42,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:32:42,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102348175] [2023-01-28 04:32:42,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102348175] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:32:42,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873646170] [2023-01-28 04:32:42,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:32:42,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:32:42,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:32:42,926 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:32:42,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-01-28 04:32:43,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:32:43,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:32:43,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 80 conjunts are in the unsatisfiable core [2023-01-28 04:32:43,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:32:43,605 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:32:43,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:32:43,610 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:32:43,610 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 29 treesize of output 14 [2023-01-28 04:32:43,624 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 04:32:43,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:32:43,931 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 04:32:43,931 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 38 treesize of output 46 [2023-01-28 04:32:44,245 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 04:32:44,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873646170] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:32:44,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:32:44,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-01-28 04:32:44,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386509200] [2023-01-28 04:32:44,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:32:44,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 04:32:44,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:32:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 04:32:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2023-01-28 04:32:44,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-28 04:32:44,248 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 2154 transitions, 60194 flow. Second operand has 30 states, 30 states have (on average 80.93333333333334) internal successors, (2428), 30 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:32:44,248 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:32:44,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-28 04:32:44,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:33:00,196 INFO L130 PetriNetUnfolder]: 13093/20273 cut-off events. [2023-01-28 04:33:00,196 INFO L131 PetriNetUnfolder]: For 881857/881857 co-relation queries the response was YES. [2023-01-28 04:33:00,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259234 conditions, 20273 events. 13093/20273 cut-off events. For 881857/881857 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 138155 event pairs, 398 based on Foata normal form. 10/20283 useless extension candidates. Maximal degree in co-relation 259031. Up to 11131 conditions per place. [2023-01-28 04:33:00,685 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1092 selfloop transitions, 1639 changer transitions 7/2738 dead transitions. [2023-01-28 04:33:00,685 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 2738 transitions, 77475 flow [2023-01-28 04:33:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-01-28 04:33:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-01-28 04:33:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4372 transitions. [2023-01-28 04:33:00,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3262686567164179 [2023-01-28 04:33:00,688 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4372 transitions. [2023-01-28 04:33:00,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4372 transitions. [2023-01-28 04:33:00,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:33:00,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4372 transitions. [2023-01-28 04:33:00,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 87.44) internal successors, (4372), 50 states have internal predecessors, (4372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:33:00,696 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 268.0) internal successors, (13668), 51 states have internal predecessors, (13668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:33:00,697 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 268.0) internal successors, (13668), 51 states have internal predecessors, (13668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:33:00,697 INFO L175 Difference]: Start difference. First operand has 534 places, 2154 transitions, 60194 flow. Second operand 50 states and 4372 transitions. [2023-01-28 04:33:00,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 2738 transitions, 77475 flow [2023-01-28 04:33:14,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 2738 transitions, 75399 flow, removed 846 selfloop flow, removed 8 redundant places. [2023-01-28 04:33:14,922 INFO L231 Difference]: Finished difference. Result has 592 places, 2486 transitions, 73048 flow [2023-01-28 04:33:14,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=58719, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=739, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=73048, PETRI_PLACES=592, PETRI_TRANSITIONS=2486} [2023-01-28 04:33:14,924 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 562 predicate places. [2023-01-28 04:33:14,924 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 2486 transitions, 73048 flow [2023-01-28 04:33:14,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 80.93333333333334) internal successors, (2428), 30 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:33:14,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:33:14,925 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:33:14,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-01-28 04:33:15,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:33:15,130 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:33:15,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:33:15,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1630052095, now seen corresponding path program 17 times [2023-01-28 04:33:15,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:33:15,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026733081] [2023-01-28 04:33:15,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:33:15,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:33:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:33:15,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:33:15,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:33:15,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026733081] [2023-01-28 04:33:15,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026733081] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:33:15,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134526623] [2023-01-28 04:33:15,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:33:15,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:33:15,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:33:15,825 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:33:15,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-01-28 04:33:15,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:33:15,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:33:15,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 83 conjunts are in the unsatisfiable core [2023-01-28 04:33:15,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:33:16,575 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:33:16,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:33:16,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:33:16,580 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:33:16,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:33:16,589 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 31 treesize of output 17 [2023-01-28 04:33:16,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:33:16,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:33:17,085 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 04:33:17,085 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 42 treesize of output 46 [2023-01-28 04:33:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:33:17,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134526623] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:33:17,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:33:17,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 32 [2023-01-28 04:33:17,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395651697] [2023-01-28 04:33:17,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:33:17,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 04:33:17,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:33:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 04:33:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 04:33:17,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-28 04:33:17,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 2486 transitions, 73048 flow. Second operand has 34 states, 34 states have (on average 81.1470588235294) internal successors, (2759), 34 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:33:17,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:33:17,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-28 04:33:17,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:33:36,998 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 04:33:44,978 INFO L130 PetriNetUnfolder]: 16228/25225 cut-off events. [2023-01-28 04:33:44,978 INFO L131 PetriNetUnfolder]: For 1308444/1308444 co-relation queries the response was YES. [2023-01-28 04:33:45,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342181 conditions, 25225 events. 16228/25225 cut-off events. For 1308444/1308444 co-relation queries the response was YES. Maximal size of possible extension queue 1181. Compared 178149 event pairs, 816 based on Foata normal form. 11/25236 useless extension candidates. Maximal degree in co-relation 341961. Up to 14627 conditions per place. [2023-01-28 04:33:45,528 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1669 selfloop transitions, 1683 changer transitions 32/3384 dead transitions. [2023-01-28 04:33:45,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 3384 transitions, 101228 flow [2023-01-28 04:33:45,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-01-28 04:33:45,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-01-28 04:33:45,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 6096 transitions. [2023-01-28 04:33:45,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32965606748864373 [2023-01-28 04:33:45,533 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 6096 transitions. [2023-01-28 04:33:45,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 6096 transitions. [2023-01-28 04:33:45,533 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:33:45,533 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 6096 transitions. [2023-01-28 04:33:45,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 88.34782608695652) internal successors, (6096), 69 states have internal predecessors, (6096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:33:45,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 268.0) internal successors, (18760), 70 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:33:45,545 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 268.0) internal successors, (18760), 70 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:33:45,545 INFO L175 Difference]: Start difference. First operand has 592 places, 2486 transitions, 73048 flow. Second operand 69 states and 6096 transitions. [2023-01-28 04:33:45,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 3384 transitions, 101228 flow [2023-01-28 04:34:10,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 3384 transitions, 98338 flow, removed 1169 selfloop flow, removed 18 redundant places. [2023-01-28 04:34:10,856 INFO L231 Difference]: Finished difference. Result has 667 places, 2909 transitions, 90606 flow [2023-01-28 04:34:10,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=70384, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=90606, PETRI_PLACES=667, PETRI_TRANSITIONS=2909} [2023-01-28 04:34:10,859 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 637 predicate places. [2023-01-28 04:34:10,859 INFO L495 AbstractCegarLoop]: Abstraction has has 667 places, 2909 transitions, 90606 flow [2023-01-28 04:34:10,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 81.1470588235294) internal successors, (2759), 34 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:34:10,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:34:10,859 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:34:10,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-01-28 04:34:11,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-01-28 04:34:11,065 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:34:11,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:34:11,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1335662557, now seen corresponding path program 22 times [2023-01-28 04:34:11,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:34:11,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766516611] [2023-01-28 04:34:11,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:34:11,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:34:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:34:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:34:11,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:34:11,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766516611] [2023-01-28 04:34:11,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766516611] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:34:11,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99857806] [2023-01-28 04:34:11,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 04:34:11,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:34:11,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:34:11,645 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:34:11,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-01-28 04:34:11,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 04:34:11,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:34:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 71 conjunts are in the unsatisfiable core [2023-01-28 04:34:11,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:34:12,052 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:34:12,052 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 40 treesize of output 16 [2023-01-28 04:34:12,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:34:12,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:34:12,188 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:34:12,188 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 36 treesize of output 44 [2023-01-28 04:34:12,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:34:12,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99857806] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:34:12,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:34:12,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 20 [2023-01-28 04:34:12,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710068865] [2023-01-28 04:34:12,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:34:12,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 04:34:12,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:34:12,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 04:34:12,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-01-28 04:34:12,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-01-28 04:34:12,297 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 667 places, 2909 transitions, 90606 flow. Second operand has 22 states, 22 states have (on average 86.5909090909091) internal successors, (1905), 22 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:34:12,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:34:12,298 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-01-28 04:34:12,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:34:32,341 INFO L130 PetriNetUnfolder]: 16199/25364 cut-off events. [2023-01-28 04:34:32,341 INFO L131 PetriNetUnfolder]: For 1575372/1577108 co-relation queries the response was YES. [2023-01-28 04:34:32,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360780 conditions, 25364 events. 16199/25364 cut-off events. For 1575372/1577108 co-relation queries the response was YES. Maximal size of possible extension queue 1259. Compared 182933 event pairs, 1534 based on Foata normal form. 879/25991 useless extension candidates. Maximal degree in co-relation 360540. Up to 20664 conditions per place. [2023-01-28 04:34:32,840 INFO L137 encePairwiseOnDemand]: 257/268 looper letters, 1999 selfloop transitions, 983 changer transitions 1/3083 dead transitions. [2023-01-28 04:34:32,840 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 681 places, 3083 transitions, 100682 flow [2023-01-28 04:34:32,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 04:34:32,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 04:34:32,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1408 transitions. [2023-01-28 04:34:32,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3502487562189055 [2023-01-28 04:34:32,843 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1408 transitions. [2023-01-28 04:34:32,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1408 transitions. [2023-01-28 04:34:32,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:34:32,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1408 transitions. [2023-01-28 04:34:32,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 93.86666666666666) internal successors, (1408), 15 states have internal predecessors, (1408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:34:32,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:34:32,846 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:34:32,846 INFO L175 Difference]: Start difference. First operand has 667 places, 2909 transitions, 90606 flow. Second operand 15 states and 1408 transitions. [2023-01-28 04:34:32,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 681 places, 3083 transitions, 100682 flow [2023-01-28 04:35:02,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 657 places, 3083 transitions, 93186 flow, removed 3085 selfloop flow, removed 24 redundant places. [2023-01-28 04:35:02,919 INFO L231 Difference]: Finished difference. Result has 659 places, 2974 transitions, 87385 flow [2023-01-28 04:35:02,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=83119, PETRI_DIFFERENCE_MINUEND_PLACES=643, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=921, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1929, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=87385, PETRI_PLACES=659, PETRI_TRANSITIONS=2974} [2023-01-28 04:35:02,922 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 629 predicate places. [2023-01-28 04:35:02,922 INFO L495 AbstractCegarLoop]: Abstraction has has 659 places, 2974 transitions, 87385 flow [2023-01-28 04:35:02,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 86.5909090909091) internal successors, (1905), 22 states have internal predecessors, (1905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:35:02,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:35:02,922 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:35:02,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-01-28 04:35:03,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:35:03,123 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:35:03,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:35:03,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1134791829, now seen corresponding path program 12 times [2023-01-28 04:35:03,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:35:03,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449318527] [2023-01-28 04:35:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:35:03,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:35:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:35:04,043 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 04:35:04,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:35:04,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449318527] [2023-01-28 04:35:04,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449318527] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:35:04,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818239623] [2023-01-28 04:35:04,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 04:35:04,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:35:04,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:35:04,049 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:35:04,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-01-28 04:35:04,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 04:35:04,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:35:04,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 83 conjunts are in the unsatisfiable core [2023-01-28 04:35:04,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:35:04,816 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:35:04,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:35:04,819 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:35:04,819 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 29 treesize of output 14 [2023-01-28 04:35:04,826 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 04:35:04,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:35:05,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:35:05,176 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 38 treesize of output 54 [2023-01-28 04:35:05,607 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 04:35:05,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818239623] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:35:05,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:35:05,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-01-28 04:35:05,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365920431] [2023-01-28 04:35:05,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:35:05,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 04:35:05,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:35:05,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 04:35:05,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 04:35:05,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-28 04:35:05,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 659 places, 2974 transitions, 87385 flow. Second operand has 35 states, 35 states have (on average 80.97142857142858) internal successors, (2834), 35 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:35:05,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:35:05,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-28 04:35:05,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:35:29,381 INFO L130 PetriNetUnfolder]: 17818/27702 cut-off events. [2023-01-28 04:35:29,381 INFO L131 PetriNetUnfolder]: For 1383358/1383358 co-relation queries the response was YES. [2023-01-28 04:35:29,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368362 conditions, 27702 events. 17818/27702 cut-off events. For 1383358/1383358 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 197823 event pairs, 1722 based on Foata normal form. 9/27711 useless extension candidates. Maximal degree in co-relation 368125. Up to 21049 conditions per place. [2023-01-28 04:35:30,057 INFO L137 encePairwiseOnDemand]: 254/268 looper letters, 1918 selfloop transitions, 1467 changer transitions 15/3400 dead transitions. [2023-01-28 04:35:30,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 694 places, 3400 transitions, 104299 flow [2023-01-28 04:35:30,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 04:35:30,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 04:35:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3204 transitions. [2023-01-28 04:35:30,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.332089552238806 [2023-01-28 04:35:30,060 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3204 transitions. [2023-01-28 04:35:30,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3204 transitions. [2023-01-28 04:35:30,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:35:30,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3204 transitions. [2023-01-28 04:35:30,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 89.0) internal successors, (3204), 36 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:35:30,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 268.0) internal successors, (9916), 37 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:35:30,067 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 268.0) internal successors, (9916), 37 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:35:30,067 INFO L175 Difference]: Start difference. First operand has 659 places, 2974 transitions, 87385 flow. Second operand 36 states and 3204 transitions. [2023-01-28 04:35:30,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 694 places, 3400 transitions, 104299 flow [2023-01-28 04:36:02,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 3400 transitions, 102599 flow, removed 319 selfloop flow, removed 11 redundant places. [2023-01-28 04:36:02,448 INFO L231 Difference]: Finished difference. Result has 694 places, 3117 transitions, 94716 flow [2023-01-28 04:36:02,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=85901, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2974, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1333, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=94716, PETRI_PLACES=694, PETRI_TRANSITIONS=3117} [2023-01-28 04:36:02,450 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 664 predicate places. [2023-01-28 04:36:02,450 INFO L495 AbstractCegarLoop]: Abstraction has has 694 places, 3117 transitions, 94716 flow [2023-01-28 04:36:02,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 80.97142857142858) internal successors, (2834), 35 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:36:02,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:36:02,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:36:02,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-01-28 04:36:02,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-01-28 04:36:02,651 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:36:02,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:36:02,651 INFO L85 PathProgramCache]: Analyzing trace with hash -752844797, now seen corresponding path program 13 times [2023-01-28 04:36:02,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:36:02,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539711721] [2023-01-28 04:36:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:36:02,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:36:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:36:03,391 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 04:36:03,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:36:03,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539711721] [2023-01-28 04:36:03,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539711721] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:36:03,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936204929] [2023-01-28 04:36:03,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 04:36:03,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:36:03,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:36:03,393 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:36:03,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-01-28 04:36:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:36:03,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 80 conjunts are in the unsatisfiable core [2023-01-28 04:36:03,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:36:03,941 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 04:36:03,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 04:36:03,944 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:36:03,944 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 42 treesize of output 19 [2023-01-28 04:36:03,966 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 04:36:03,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:36:04,236 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 04:36:04,237 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 38 treesize of output 46 [2023-01-28 04:36:04,541 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 04:36:04,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936204929] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:36:04,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:36:04,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-01-28 04:36:04,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047825934] [2023-01-28 04:36:04,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:36:04,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 04:36:04,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:36:04,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 04:36:04,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2023-01-28 04:36:04,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 268 [2023-01-28 04:36:04,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 694 places, 3117 transitions, 94716 flow. Second operand has 29 states, 29 states have (on average 80.89655172413794) internal successors, (2346), 29 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:36:04,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:36:04,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 268 [2023-01-28 04:36:04,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:36:32,126 INFO L130 PetriNetUnfolder]: 19350/30383 cut-off events. [2023-01-28 04:36:32,126 INFO L131 PetriNetUnfolder]: For 1525877/1525877 co-relation queries the response was YES. [2023-01-28 04:36:32,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410770 conditions, 30383 events. 19350/30383 cut-off events. For 1525877/1525877 co-relation queries the response was YES. Maximal size of possible extension queue 1455. Compared 225087 event pairs, 835 based on Foata normal form. 10/30393 useless extension candidates. Maximal degree in co-relation 410521. Up to 15936 conditions per place. [2023-01-28 04:36:32,989 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1472 selfloop transitions, 2177 changer transitions 40/3689 dead transitions. [2023-01-28 04:36:32,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 741 places, 3689 transitions, 114934 flow [2023-01-28 04:36:32,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-01-28 04:36:32,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-01-28 04:36:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4209 transitions. [2023-01-28 04:36:32,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32719216417910446 [2023-01-28 04:36:32,993 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4209 transitions. [2023-01-28 04:36:32,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4209 transitions. [2023-01-28 04:36:32,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:36:32,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4209 transitions. [2023-01-28 04:36:32,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 87.6875) internal successors, (4209), 48 states have internal predecessors, (4209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:36:33,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 268.0) internal successors, (13132), 49 states have internal predecessors, (13132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:36:33,002 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 268.0) internal successors, (13132), 49 states have internal predecessors, (13132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:36:33,002 INFO L175 Difference]: Start difference. First operand has 694 places, 3117 transitions, 94716 flow. Second operand 48 states and 4209 transitions. [2023-01-28 04:36:33,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 741 places, 3689 transitions, 114934 flow [2023-01-28 04:37:11,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 724 places, 3689 transitions, 112750 flow, removed 631 selfloop flow, removed 17 redundant places. [2023-01-28 04:37:11,833 INFO L231 Difference]: Finished difference. Result has 730 places, 3429 transitions, 108718 flow [2023-01-28 04:37:11,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=92829, PETRI_DIFFERENCE_MINUEND_PLACES=677, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1874, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=108718, PETRI_PLACES=730, PETRI_TRANSITIONS=3429} [2023-01-28 04:37:11,835 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 700 predicate places. [2023-01-28 04:37:11,835 INFO L495 AbstractCegarLoop]: Abstraction has has 730 places, 3429 transitions, 108718 flow [2023-01-28 04:37:11,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 80.89655172413794) internal successors, (2346), 29 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:37:11,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:37:11,836 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:37:11,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-01-28 04:37:12,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-01-28 04:37:12,037 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:37:12,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:37:12,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1863683516, now seen corresponding path program 14 times [2023-01-28 04:37:12,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:37:12,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620319695] [2023-01-28 04:37:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:37:12,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:37:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:37:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:37:12,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:37:12,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620319695] [2023-01-28 04:37:12,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620319695] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:37:12,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990735765] [2023-01-28 04:37:12,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 04:37:12,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:37:12,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:37:12,128 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:37:12,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-01-28 04:37:12,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 04:37:12,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:37:12,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 04:37:12,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:37:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:37:12,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:37:12,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:37:12,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990735765] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:37:12,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:37:12,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 04:37:12,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889207857] [2023-01-28 04:37:12,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:37:12,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 04:37:12,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:37:12,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 04:37:12,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-01-28 04:37:12,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-01-28 04:37:12,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 3429 transitions, 108718 flow. Second operand has 19 states, 19 states have (on average 106.15789473684211) internal successors, (2017), 19 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:37:12,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:37:12,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-01-28 04:37:12,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:37:42,858 INFO L130 PetriNetUnfolder]: 19945/32392 cut-off events. [2023-01-28 04:37:42,858 INFO L131 PetriNetUnfolder]: For 2326755/2330747 co-relation queries the response was YES. [2023-01-28 04:37:43,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477057 conditions, 32392 events. 19945/32392 cut-off events. For 2326755/2330747 co-relation queries the response was YES. Maximal size of possible extension queue 1805. Compared 258382 event pairs, 4613 based on Foata normal form. 3355/35095 useless extension candidates. Maximal degree in co-relation 476802. Up to 13782 conditions per place. [2023-01-28 04:37:44,193 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 3518 selfloop transitions, 416 changer transitions 134/4229 dead transitions. [2023-01-28 04:37:44,193 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 726 places, 4229 transitions, 143513 flow [2023-01-28 04:37:44,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 04:37:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 04:37:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1123 transitions. [2023-01-28 04:37:44,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41902985074626864 [2023-01-28 04:37:44,195 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1123 transitions. [2023-01-28 04:37:44,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1123 transitions. [2023-01-28 04:37:44,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:37:44,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1123 transitions. [2023-01-28 04:37:44,196 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 112.3) internal successors, (1123), 10 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:37:44,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:37:44,197 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:37:44,197 INFO L175 Difference]: Start difference. First operand has 730 places, 3429 transitions, 108718 flow. Second operand 10 states and 1123 transitions. [2023-01-28 04:37:44,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 726 places, 4229 transitions, 143513 flow [2023-01-28 04:38:32,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 4229 transitions, 140453 flow, removed 1270 selfloop flow, removed 24 redundant places. [2023-01-28 04:38:32,146 INFO L231 Difference]: Finished difference. Result has 707 places, 3044 transitions, 97327 flow [2023-01-28 04:38:32,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=93352, PETRI_DIFFERENCE_MINUEND_PLACES=693, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=97327, PETRI_PLACES=707, PETRI_TRANSITIONS=3044} [2023-01-28 04:38:32,148 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 677 predicate places. [2023-01-28 04:38:32,148 INFO L495 AbstractCegarLoop]: Abstraction has has 707 places, 3044 transitions, 97327 flow [2023-01-28 04:38:32,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.15789473684211) internal successors, (2017), 19 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:38:32,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 04:38:32,149 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 04:38:32,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-01-28 04:38:32,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:38:32,351 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 04:38:32,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 04:38:32,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1989551583, now seen corresponding path program 23 times [2023-01-28 04:38:32,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 04:38:32,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959304515] [2023-01-28 04:38:32,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 04:38:32,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 04:38:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 04:38:33,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 04:38:33,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 04:38:33,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959304515] [2023-01-28 04:38:33,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959304515] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 04:38:33,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856477783] [2023-01-28 04:38:33,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 04:38:33,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:38:33,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 04:38:33,384 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 04:38:33,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-01-28 04:38:33,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 04:38:33,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 04:38:33,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 71 conjunts are in the unsatisfiable core [2023-01-28 04:38:33,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 04:38:33,878 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:38:33,878 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 27 treesize of output 11 [2023-01-28 04:38:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:38:33,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 04:38:34,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 04:38:34,063 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 36 treesize of output 44 [2023-01-28 04:38:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 04:38:34,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856477783] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 04:38:34,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 04:38:34,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 24 [2023-01-28 04:38:34,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158491125] [2023-01-28 04:38:34,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 04:38:34,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 04:38:34,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 04:38:34,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 04:38:34,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2023-01-28 04:38:34,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 268 [2023-01-28 04:38:34,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 3044 transitions, 97327 flow. Second operand has 26 states, 26 states have (on average 76.1923076923077) internal successors, (1981), 26 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:38:34,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 04:38:34,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 268 [2023-01-28 04:38:34,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 04:39:03,313 INFO L130 PetriNetUnfolder]: 21035/34196 cut-off events. [2023-01-28 04:39:03,313 INFO L131 PetriNetUnfolder]: For 2411228/2414158 co-relation queries the response was YES. [2023-01-28 04:39:03,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513062 conditions, 34196 events. 21035/34196 cut-off events. For 2411228/2414158 co-relation queries the response was YES. Maximal size of possible extension queue 1848. Compared 274318 event pairs, 4013 based on Foata normal form. 1601/35332 useless extension candidates. Maximal degree in co-relation 512810. Up to 29781 conditions per place. [2023-01-28 04:39:04,178 INFO L137 encePairwiseOnDemand]: 257/268 looper letters, 2493 selfloop transitions, 822 changer transitions 7/3405 dead transitions. [2023-01-28 04:39:04,178 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 716 places, 3405 transitions, 116365 flow [2023-01-28 04:39:04,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 04:39:04,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 04:39:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1750 transitions. [2023-01-28 04:39:04,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31094527363184077 [2023-01-28 04:39:04,180 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1750 transitions. [2023-01-28 04:39:04,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1750 transitions. [2023-01-28 04:39:04,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 04:39:04,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1750 transitions. [2023-01-28 04:39:04,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 83.33333333333333) internal successors, (1750), 21 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:39:04,183 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:39:04,183 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 268.0) internal successors, (5896), 22 states have internal predecessors, (5896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 04:39:04,183 INFO L175 Difference]: Start difference. First operand has 707 places, 3044 transitions, 97327 flow. Second operand 21 states and 1750 transitions. [2023-01-28 04:39:04,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 716 places, 3405 transitions, 116365 flow Received shutdown request... [2023-01-28 04:39:27,799 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 04:39:27,799 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 04:39:27,804 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 04:39:27,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-01-28 04:39:28,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 04:39:28,005 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-28 04:39:28,006 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-28 04:39:28,006 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-28 04:39:28,006 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-28 04:39:28,007 INFO L445 BasicCegarLoop]: Path program histogram: [23, 17, 14, 6, 1, 1, 1, 1, 1] [2023-01-28 04:39:28,009 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 04:39:28,009 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 04:39:28,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 04:39:28 BasicIcfg [2023-01-28 04:39:28,011 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 04:39:28,011 INFO L158 Benchmark]: Toolchain (without parser) took 782433.91ms. Allocated memory was 325.1MB in the beginning and 13.3GB in the end (delta: 13.0GB). Free memory was 284.4MB in the beginning and 8.9GB in the end (delta: -8.6GB). Peak memory consumption was 5.4GB. Max. memory is 16.0GB. [2023-01-28 04:39:28,011 INFO L158 Benchmark]: CDTParser took 0.11ms. 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 04:39:28,011 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.37ms. Allocated memory is still 325.1MB. Free memory was 284.1MB in the beginning and 272.6MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 04:39:28,011 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.98ms. Allocated memory is still 325.1MB. Free memory was 272.6MB in the beginning and 270.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 04:39:28,012 INFO L158 Benchmark]: Boogie Preprocessor took 25.34ms. Allocated memory is still 325.1MB. Free memory was 270.4MB in the beginning and 268.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 04:39:28,012 INFO L158 Benchmark]: RCFGBuilder took 643.33ms. Allocated memory is still 325.1MB. Free memory was 268.4MB in the beginning and 299.6MB in the end (delta: -31.2MB). Peak memory consumption was 40.0MB. Max. memory is 16.0GB. [2023-01-28 04:39:28,013 INFO L158 Benchmark]: TraceAbstraction took 781525.05ms. Allocated memory was 325.1MB in the beginning and 13.3GB in the end (delta: 13.0GB). Free memory was 298.8MB in the beginning and 8.9GB in the end (delta: -8.6GB). Peak memory consumption was 5.4GB. Max. memory is 16.0GB. [2023-01-28 04:39:28,014 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 255.9MB. Free memory is still 213.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 199.37ms. Allocated memory is still 325.1MB. Free memory was 284.1MB in the beginning and 272.6MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 34.98ms. Allocated memory is still 325.1MB. Free memory was 272.6MB in the beginning and 270.4MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 25.34ms. Allocated memory is still 325.1MB. Free memory was 270.4MB in the beginning and 268.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 643.33ms. Allocated memory is still 325.1MB. Free memory was 268.4MB in the beginning and 299.6MB in the end (delta: -31.2MB). Peak memory consumption was 40.0MB. Max. memory is 16.0GB. * TraceAbstraction took 781525.05ms. Allocated memory was 325.1MB in the beginning and 13.3GB in the end (delta: 13.0GB). Free memory was 298.8MB in the beginning and 8.9GB in the end (delta: -8.6GB). Peak memory consumption was 5.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 129 PlacesBefore, 30 PlacesAfterwards, 131 TransitionsBefore, 24 TransitionsAfterwards, 1320 CoEnabledTransitionPairs, 7 FixpointIterations, 70 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 124 TotalNumberOfCompositions, 1489 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1441, independent: 1423, independent conditional: 0, independent unconditional: 1423, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 699, independent: 692, independent conditional: 0, independent unconditional: 692, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1441, independent: 731, independent conditional: 0, independent unconditional: 731, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 699, unknown conditional: 0, unknown unconditional: 699] , Statistics on independence cache: Total cache size (in pairs): 53, Positive cache size: 51, Positive conditional cache size: 0, Positive unconditional cache size: 51, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 95]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 87]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 163 locations, 4 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: 781.4s, OverallIterations: 65, TraceHistogramMax: 3, PathProgramHistogramMax: 23, EmptinessCheckTime: 0.0s, AutomataDifference: 705.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: 287 mSolverCounterUnknown, 10106 SdHoareTripleChecker+Valid, 69.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10106 mSDsluCounter, 2903 SdHoareTripleChecker+Invalid, 65.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1512 IncrementalHoareTripleChecker+Unchecked, 2575 mSDsCounter, 541 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50035 IncrementalHoareTripleChecker+Invalid, 52375 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 541 mSolverCounterUnsat, 328 mSDtfsCounter, 50035 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3985 GetRequests, 2091 SyntacticMatches, 88 SemanticMatches, 1806 ConstructedPredicates, 13 IntricatePredicates, 2 DeprecatedPredicates, 17441 ImplicationChecksByTransitivity, 45.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=108718occurred in iteration=63, InterpolantAutomatonStates: 1012, 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: 0.8s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 49.0s InterpolantComputationTime, 3007 NumberOfCodeBlocks, 3007 NumberOfCodeBlocksAsserted, 180 NumberOfCheckSat, 4282 ConstructedInterpolants, 144 QuantifiedInterpolants, 39275 SizeOfPredicates, 991 NumberOfNonLiveVariables, 16335 ConjunctsInSsa, 2244 ConjunctsInUnsatCore, 187 InterpolantComputations, 9 PerfectInterpolantSequences, 329/888 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