/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 AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 11:36:38,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 11:36:38,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 11:36:38,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 11:36:38,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 11:36:38,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 11:36:38,846 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 11:36:38,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 11:36:38,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 11:36:38,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 11:36:38,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 11:36:38,852 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 11:36:38,852 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 11:36:38,853 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 11:36:38,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 11:36:38,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 11:36:38,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 11:36:38,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 11:36:38,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 11:36:38,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 11:36:38,860 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 11:36:38,864 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 11:36:38,865 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 11:36:38,866 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 11:36:38,868 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 11:36:38,869 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 11:36:38,869 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 11:36:38,870 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 11:36:38,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 11:36:38,871 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 11:36:38,871 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 11:36:38,872 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 11:36:38,872 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 11:36:38,873 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 11:36:38,873 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 11:36:38,874 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 11:36:38,874 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 11:36:38,874 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 11:36:38,875 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 11:36:38,875 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 11:36:38,876 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 11:36:38,877 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 11:36:38,894 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 11:36:38,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 11:36:38,895 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 11:36:38,895 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 11:36:38,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 11:36:38,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 11:36:38,896 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 11:36:38,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 11:36:38,896 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 11:36:38,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 11:36:38,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 11:36:38,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 11:36:38,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 11:36:38,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 11:36:38,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 11:36:38,897 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 11:36:38,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 11:36:38,897 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 11:36:38,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 11:36:38,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 11:36:38,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 11:36:38,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 11:36:38,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 11:36:38,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:36:38,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 11:36:38,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 11:36:38,898 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 11:36:38,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 11:36:38,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 11:36:38,899 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 11:36:38,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 11:36:38,899 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 11:36:39,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 11:36:39,114 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 11:36:39,116 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 11:36:39,117 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 11:36:39,117 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 11:36:39,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-01-28 11:36:40,283 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 11:36:40,456 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 11:36:40,457 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-01-28 11:36:40,462 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06158c291/a21191ad0e1c45698725a90010d29e8a/FLAG62c85b455 [2023-01-28 11:36:40,472 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06158c291/a21191ad0e1c45698725a90010d29e8a [2023-01-28 11:36:40,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 11:36:40,476 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 11:36:40,477 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 11:36:40,477 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 11:36:40,479 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 11:36:40,479 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,480 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b47eb58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40, skipping insertion in model container [2023-01-28 11:36:40,480 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 11:36:40,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 11:36:40,697 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-queue-add-2.wvr.c[2696,2709] [2023-01-28 11:36:40,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:36:40,720 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 11:36:40,753 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-queue-add-2.wvr.c[2696,2709] [2023-01-28 11:36:40,760 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:36:40,766 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:36:40,766 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:36:40,776 INFO L208 MainTranslator]: Completed translation [2023-01-28 11:36:40,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40 WrapperNode [2023-01-28 11:36:40,776 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 11:36:40,778 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 11:36:40,778 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 11:36:40,778 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 11:36:40,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,797 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,826 INFO L138 Inliner]: procedures = 24, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 158 [2023-01-28 11:36:40,826 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 11:36:40,827 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 11:36:40,827 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 11:36:40,827 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 11:36:40,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,848 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,853 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,884 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,885 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,886 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 11:36:40,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 11:36:40,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 11:36:40,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 11:36:40,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (1/1) ... [2023-01-28 11:36:40,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:36:40,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:36:40,925 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 11:36:40,944 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 11:36:40,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 11:36:40,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 11:36:40,957 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 11:36:40,957 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 11:36:40,958 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 11:36:40,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 11:36:40,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 11:36:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 11:36:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 11:36:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 11:36:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 11:36:40,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 11:36:40,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 11:36:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 11:36:40,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 11:36:40,961 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 11:36:41,100 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 11:36:41,102 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 11:36:41,390 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 11:36:41,471 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 11:36:41,471 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 11:36:41,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:36:41 BoogieIcfgContainer [2023-01-28 11:36:41,473 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 11:36:41,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 11:36:41,475 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 11:36:41,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 11:36:41,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 11:36:40" (1/3) ... [2023-01-28 11:36:41,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6246b777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:36:41, skipping insertion in model container [2023-01-28 11:36:41,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:36:40" (2/3) ... [2023-01-28 11:36:41,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6246b777 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:36:41, skipping insertion in model container [2023-01-28 11:36:41,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:36:41" (3/3) ... [2023-01-28 11:36:41,479 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-01-28 11:36:41,493 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 11:36:41,493 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 11:36:41,493 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 11:36:41,532 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 11:36:41,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 272 flow [2023-01-28 11:36:41,613 INFO L130 PetriNetUnfolder]: 11/126 cut-off events. [2023-01-28 11:36:41,613 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:36:41,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 11/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 73 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 3 conditions per place. [2023-01-28 11:36:41,618 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 128 transitions, 272 flow [2023-01-28 11:36:41,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 118 transitions, 248 flow [2023-01-28 11:36:41,624 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 11:36:41,631 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 118 transitions, 248 flow [2023-01-28 11:36:41,633 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 118 transitions, 248 flow [2023-01-28 11:36:41,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 118 transitions, 248 flow [2023-01-28 11:36:41,658 INFO L130 PetriNetUnfolder]: 11/118 cut-off events. [2023-01-28 11:36:41,658 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:36:41,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 11/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 70 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 93. Up to 3 conditions per place. [2023-01-28 11:36:41,660 INFO L119 LiptonReduction]: Number of co-enabled transitions 538 [2023-01-28 11:36:45,474 INFO L134 LiptonReduction]: Checked pairs total: 676 [2023-01-28 11:36:45,475 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-01-28 11:36:45,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 11:36:45,497 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;@19396ae8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 11:36:45,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 11:36:45,515 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 11:36:45,515 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:36:45,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:36:45,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:36:45,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:36:45,523 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:36:45,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1821199336, now seen corresponding path program 1 times [2023-01-28 11:36:45,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:36:45,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318236890] [2023-01-28 11:36:45,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:36:45,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:36:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:36:45,949 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 11:36:45,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:36:45,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318236890] [2023-01-28 11:36:45,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318236890] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:36:45,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:36:45,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 11:36:45,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402550093] [2023-01-28 11:36:45,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:36:45,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:36:45,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:36:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:36:45,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:36:45,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 249 [2023-01-28 11:36:45,986 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:45,986 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:36:45,986 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 249 [2023-01-28 11:36:45,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:36:46,059 INFO L130 PetriNetUnfolder]: 45/87 cut-off events. [2023-01-28 11:36:46,059 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2023-01-28 11:36:46,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 87 events. 45/87 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 210 event pairs, 18 based on Foata normal form. 4/63 useless extension candidates. Maximal degree in co-relation 120. Up to 76 conditions per place. [2023-01-28 11:36:46,061 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 14 selfloop transitions, 2 changer transitions 5/23 dead transitions. [2023-01-28 11:36:46,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 23 transitions, 106 flow [2023-01-28 11:36:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:36:46,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:36:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 417 transitions. [2023-01-28 11:36:46,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186746987951807 [2023-01-28 11:36:46,074 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 417 transitions. [2023-01-28 11:36:46,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 417 transitions. [2023-01-28 11:36:46,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:36:46,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 417 transitions. [2023-01-28 11:36:46,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,085 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,087 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 417 transitions. [2023-01-28 11:36:46,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 23 transitions, 106 flow [2023-01-28 11:36:46,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 23 transitions, 94 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 11:36:46,090 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2023-01-28 11:36:46,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-01-28 11:36:46,094 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-01-28 11:36:46,094 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2023-01-28 11:36:46,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:36:46,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:36:46,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 11:36:46,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:36:46,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:36:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash -885649661, now seen corresponding path program 1 times [2023-01-28 11:36:46,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:36:46,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218469292] [2023-01-28 11:36:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:36:46,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:36:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:36:46,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:36:46,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:36:46,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218469292] [2023-01-28 11:36:46,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218469292] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:36:46,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:36:46,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 11:36:46,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239515486] [2023-01-28 11:36:46,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:36:46,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 11:36:46,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:36:46,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 11:36:46,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-01-28 11:36:46,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 249 [2023-01-28 11:36:46,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 7 states, 7 states have (on average 103.0) internal successors, (721), 7 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:36:46,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 249 [2023-01-28 11:36:46,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:36:46,520 INFO L130 PetriNetUnfolder]: 72/136 cut-off events. [2023-01-28 11:36:46,520 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-01-28 11:36:46,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 136 events. 72/136 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 422 event pairs, 15 based on Foata normal form. 1/96 useless extension candidates. Maximal degree in co-relation 350. Up to 77 conditions per place. [2023-01-28 11:36:46,522 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 32 selfloop transitions, 8 changer transitions 2/43 dead transitions. [2023-01-28 11:36:46,522 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 43 transitions, 218 flow [2023-01-28 11:36:46,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:36:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:36:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 648 transitions. [2023-01-28 11:36:46,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43373493975903615 [2023-01-28 11:36:46,525 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 648 transitions. [2023-01-28 11:36:46,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 648 transitions. [2023-01-28 11:36:46,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:36:46,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 648 transitions. [2023-01-28 11:36:46,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 108.0) internal successors, (648), 6 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,531 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,531 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 6 states and 648 transitions. [2023-01-28 11:36:46,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 43 transitions, 218 flow [2023-01-28 11:36:46,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 43 transitions, 214 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 11:36:46,533 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 112 flow [2023-01-28 11:36:46,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=112, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-01-28 11:36:46,534 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 7 predicate places. [2023-01-28 11:36:46,534 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 112 flow [2023-01-28 11:36:46,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 103.0) internal successors, (721), 7 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:36:46,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:36:46,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 11:36:46,535 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:36:46,535 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:36:46,535 INFO L85 PathProgramCache]: Analyzing trace with hash 919629356, now seen corresponding path program 1 times [2023-01-28 11:36:46,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:36:46,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197430825] [2023-01-28 11:36:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:36:46,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:36:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:36:46,660 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 11:36:46,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:36:46,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197430825] [2023-01-28 11:36:46,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197430825] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:36:46,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:36:46,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 11:36:46,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388083871] [2023-01-28 11:36:46,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:36:46,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:36:46,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:36:46,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:36:46,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:36:46,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 249 [2023-01-28 11:36:46,666 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,666 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:36:46,666 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 249 [2023-01-28 11:36:46,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:36:46,743 INFO L130 PetriNetUnfolder]: 87/181 cut-off events. [2023-01-28 11:36:46,743 INFO L131 PetriNetUnfolder]: For 122/124 co-relation queries the response was YES. [2023-01-28 11:36:46,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 181 events. 87/181 cut-off events. For 122/124 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 640 event pairs, 12 based on Foata normal form. 17/170 useless extension candidates. Maximal degree in co-relation 577. Up to 109 conditions per place. [2023-01-28 11:36:46,745 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 30 selfloop transitions, 9 changer transitions 2/43 dead transitions. [2023-01-28 11:36:46,745 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 43 transitions, 262 flow [2023-01-28 11:36:46,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:36:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:36:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 469 transitions. [2023-01-28 11:36:46,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708835341365462 [2023-01-28 11:36:46,747 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 469 transitions. [2023-01-28 11:36:46,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 469 transitions. [2023-01-28 11:36:46,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:36:46,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 469 transitions. [2023-01-28 11:36:46,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,751 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 249.0) internal successors, (1245), 5 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,752 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 112 flow. Second operand 4 states and 469 transitions. [2023-01-28 11:36:46,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 43 transitions, 262 flow [2023-01-28 11:36:46,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 43 transitions, 249 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 11:36:46,763 INFO L231 Difference]: Finished difference. Result has 31 places, 27 transitions, 165 flow [2023-01-28 11:36:46,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=165, PETRI_PLACES=31, PETRI_TRANSITIONS=27} [2023-01-28 11:36:46,764 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-01-28 11:36:46,764 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 27 transitions, 165 flow [2023-01-28 11:36:46,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:46,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:36:46,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:36:46,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 11:36:46,765 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:36:46,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:36:46,765 INFO L85 PathProgramCache]: Analyzing trace with hash -86135109, now seen corresponding path program 1 times [2023-01-28 11:36:46,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:36:46,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49042290] [2023-01-28 11:36:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:36:46,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:36:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:36:46,903 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 11:36:46,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:36:46,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49042290] [2023-01-28 11:36:46,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49042290] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:36:46,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172539624] [2023-01-28 11:36:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:36:46,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:36:46,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:36:46,909 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 11:36:46,931 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 11:36:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:36:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:36:46,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:36:47,101 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 11:36:47,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:36:47,183 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 11:36:47,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172539624] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:36:47,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:36:47,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 11:36:47,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156562662] [2023-01-28 11:36:47,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:36:47,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 11:36:47,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:36:47,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 11:36:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 11:36:47,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 249 [2023-01-28 11:36:47,188 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 27 transitions, 165 flow. Second operand has 12 states, 12 states have (on average 98.0) internal successors, (1176), 12 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:47,188 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:36:47,188 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 249 [2023-01-28 11:36:47,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:36:47,280 INFO L130 PetriNetUnfolder]: 82/182 cut-off events. [2023-01-28 11:36:47,280 INFO L131 PetriNetUnfolder]: For 327/332 co-relation queries the response was YES. [2023-01-28 11:36:47,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 758 conditions, 182 events. 82/182 cut-off events. For 327/332 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 606 event pairs, 36 based on Foata normal form. 13/166 useless extension candidates. Maximal degree in co-relation 733. Up to 158 conditions per place. [2023-01-28 11:36:47,282 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 23 selfloop transitions, 3 changer transitions 11/39 dead transitions. [2023-01-28 11:36:47,282 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 39 transitions, 290 flow [2023-01-28 11:36:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:36:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:36:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 606 transitions. [2023-01-28 11:36:47,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40562248995983935 [2023-01-28 11:36:47,285 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 606 transitions. [2023-01-28 11:36:47,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 606 transitions. [2023-01-28 11:36:47,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:36:47,286 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 606 transitions. [2023-01-28 11:36:47,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:47,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:47,290 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:47,290 INFO L175 Difference]: Start difference. First operand has 31 places, 27 transitions, 165 flow. Second operand 6 states and 606 transitions. [2023-01-28 11:36:47,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 39 transitions, 290 flow [2023-01-28 11:36:47,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 39 transitions, 262 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-01-28 11:36:47,292 INFO L231 Difference]: Finished difference. Result has 37 places, 28 transitions, 167 flow [2023-01-28 11:36:47,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=167, PETRI_PLACES=37, PETRI_TRANSITIONS=28} [2023-01-28 11:36:47,293 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 16 predicate places. [2023-01-28 11:36:47,293 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 28 transitions, 167 flow [2023-01-28 11:36:47,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.0) internal successors, (1176), 12 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:47,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:36:47,294 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:36:47,303 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 11:36:47,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:36:47,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:36:47,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:36:47,501 INFO L85 PathProgramCache]: Analyzing trace with hash -984099166, now seen corresponding path program 2 times [2023-01-28 11:36:47,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:36:47,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452220038] [2023-01-28 11:36:47,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:36:47,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:36:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:36:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:36:48,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:36:48,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452220038] [2023-01-28 11:36:48,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452220038] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:36:48,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526143277] [2023-01-28 11:36:48,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:36:48,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:36:48,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:36:48,122 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 11:36:48,153 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 11:36:48,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:36:48,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:36:48,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 11:36:48,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:36:48,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:36:48,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:36:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:36:48,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:36:48,659 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:36:48,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-01-28 11:36:48,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-28 11:36:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:36:48,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526143277] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:36:48,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:36:48,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-01-28 11:36:48,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379399578] [2023-01-28 11:36:48,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:36:48,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 11:36:48,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:36:48,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 11:36:48,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-01-28 11:36:48,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 249 [2023-01-28 11:36:48,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 28 transitions, 167 flow. Second operand has 23 states, 23 states have (on average 81.6086956521739) internal successors, (1877), 23 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:48,947 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:36:48,947 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 249 [2023-01-28 11:36:48,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:36:50,739 INFO L130 PetriNetUnfolder]: 282/593 cut-off events. [2023-01-28 11:36:50,739 INFO L131 PetriNetUnfolder]: For 1083/1091 co-relation queries the response was YES. [2023-01-28 11:36:50,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2270 conditions, 593 events. 282/593 cut-off events. For 1083/1091 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2938 event pairs, 20 based on Foata normal form. 48/538 useless extension candidates. Maximal degree in co-relation 2244. Up to 247 conditions per place. [2023-01-28 11:36:50,743 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 99 selfloop transitions, 59 changer transitions 1/161 dead transitions. [2023-01-28 11:36:50,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 161 transitions, 1137 flow [2023-01-28 11:36:50,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 11:36:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 11:36:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2058 transitions. [2023-01-28 11:36:50,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34437751004016065 [2023-01-28 11:36:50,749 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2058 transitions. [2023-01-28 11:36:50,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2058 transitions. [2023-01-28 11:36:50,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:36:50,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2058 transitions. [2023-01-28 11:36:50,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 85.75) internal successors, (2058), 24 states have internal predecessors, (2058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:50,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 249.0) internal successors, (6225), 25 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:50,762 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 249.0) internal successors, (6225), 25 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:50,763 INFO L175 Difference]: Start difference. First operand has 37 places, 28 transitions, 167 flow. Second operand 24 states and 2058 transitions. [2023-01-28 11:36:50,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 161 transitions, 1137 flow [2023-01-28 11:36:50,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 161 transitions, 1095 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-01-28 11:36:50,767 INFO L231 Difference]: Finished difference. Result has 59 places, 92 transitions, 815 flow [2023-01-28 11:36:50,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=815, PETRI_PLACES=59, PETRI_TRANSITIONS=92} [2023-01-28 11:36:50,768 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 38 predicate places. [2023-01-28 11:36:50,768 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 92 transitions, 815 flow [2023-01-28 11:36:50,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.6086956521739) internal successors, (1877), 23 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:50,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:36:50,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:36:50,777 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 11:36:50,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:36:50,975 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:36:50,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:36:50,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1199743108, now seen corresponding path program 3 times [2023-01-28 11:36:50,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:36:50,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139846819] [2023-01-28 11:36:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:36:50,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:36:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:36:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:36:51,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:36:51,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139846819] [2023-01-28 11:36:51,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139846819] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:36:51,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894045992] [2023-01-28 11:36:51,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:36:51,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:36:51,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:36:51,477 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 11:36:51,488 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 11:36:51,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:36:51,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:36:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 11:36:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:36:51,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:36:51,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:36:51,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:36:51,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:36:52,086 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:36:52,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-01-28 11:36:52,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-28 11:36:52,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:36:52,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894045992] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:36:52,304 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:36:52,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-01-28 11:36:52,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766418180] [2023-01-28 11:36:52,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:36:52,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 11:36:52,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:36:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 11:36:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-01-28 11:36:52,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 249 [2023-01-28 11:36:52,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 92 transitions, 815 flow. Second operand has 23 states, 23 states have (on average 81.78260869565217) internal successors, (1881), 23 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:52,311 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:36:52,311 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 249 [2023-01-28 11:36:52,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:36:53,507 INFO L130 PetriNetUnfolder]: 322/653 cut-off events. [2023-01-28 11:36:53,507 INFO L131 PetriNetUnfolder]: For 1658/1661 co-relation queries the response was YES. [2023-01-28 11:36:53,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3034 conditions, 653 events. 322/653 cut-off events. For 1658/1661 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3161 event pairs, 39 based on Foata normal form. 21/570 useless extension candidates. Maximal degree in co-relation 2026. Up to 281 conditions per place. [2023-01-28 11:36:53,512 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 103 selfloop transitions, 52 changer transitions 0/157 dead transitions. [2023-01-28 11:36:53,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 157 transitions, 1487 flow [2023-01-28 11:36:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 11:36:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 11:36:53,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1532 transitions. [2023-01-28 11:36:53,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34181169120928157 [2023-01-28 11:36:53,518 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1532 transitions. [2023-01-28 11:36:53,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1532 transitions. [2023-01-28 11:36:53,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:36:53,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1532 transitions. [2023-01-28 11:36:53,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 85.11111111111111) internal successors, (1532), 18 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:53,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:53,528 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:53,528 INFO L175 Difference]: Start difference. First operand has 59 places, 92 transitions, 815 flow. Second operand 18 states and 1532 transitions. [2023-01-28 11:36:53,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 157 transitions, 1487 flow [2023-01-28 11:36:53,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 157 transitions, 1199 flow, removed 140 selfloop flow, removed 5 redundant places. [2023-01-28 11:36:53,539 INFO L231 Difference]: Finished difference. Result has 77 places, 108 transitions, 910 flow [2023-01-28 11:36:53,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=910, PETRI_PLACES=77, PETRI_TRANSITIONS=108} [2023-01-28 11:36:53,539 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 56 predicate places. [2023-01-28 11:36:53,540 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 108 transitions, 910 flow [2023-01-28 11:36:53,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 81.78260869565217) internal successors, (1881), 23 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:53,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:36:53,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:36:53,551 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 11:36:53,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:36:53,746 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:36:53,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:36:53,747 INFO L85 PathProgramCache]: Analyzing trace with hash -677539897, now seen corresponding path program 1 times [2023-01-28 11:36:53,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:36:53,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614595497] [2023-01-28 11:36:53,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:36:53,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:36:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:36:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:36:54,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:36:54,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614595497] [2023-01-28 11:36:54,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614595497] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:36:54,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906771477] [2023-01-28 11:36:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:36:54,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:36:54,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:36:54,257 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 11:36:54,284 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 11:36:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:36:54,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 11:36:54,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:36:54,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:36:54,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:36:54,609 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:36:54,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 29 [2023-01-28 11:36:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:36:54,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906771477] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:36:54,686 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:36:54,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-01-28 11:36:54,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406715409] [2023-01-28 11:36:54,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:36:54,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 11:36:54,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:36:54,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 11:36:54,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-01-28 11:36:54,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 249 [2023-01-28 11:36:54,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 108 transitions, 910 flow. Second operand has 19 states, 19 states have (on average 75.10526315789474) internal successors, (1427), 19 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:54,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:36:54,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 249 [2023-01-28 11:36:54,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:36:55,273 INFO L130 PetriNetUnfolder]: 357/723 cut-off events. [2023-01-28 11:36:55,273 INFO L131 PetriNetUnfolder]: For 1922/1922 co-relation queries the response was YES. [2023-01-28 11:36:55,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3229 conditions, 723 events. 357/723 cut-off events. For 1922/1922 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3616 event pairs, 51 based on Foata normal form. 10/668 useless extension candidates. Maximal degree in co-relation 3123. Up to 591 conditions per place. [2023-01-28 11:36:55,279 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 122 selfloop transitions, 30 changer transitions 4/157 dead transitions. [2023-01-28 11:36:55,279 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 157 transitions, 1466 flow [2023-01-28 11:36:55,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 11:36:55,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 11:36:55,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1171 transitions. [2023-01-28 11:36:55,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.313520749665328 [2023-01-28 11:36:55,282 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1171 transitions. [2023-01-28 11:36:55,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1171 transitions. [2023-01-28 11:36:55,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:36:55,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1171 transitions. [2023-01-28 11:36:55,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 78.06666666666666) internal successors, (1171), 15 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:55,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:55,291 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 249.0) internal successors, (3984), 16 states have internal predecessors, (3984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:55,291 INFO L175 Difference]: Start difference. First operand has 77 places, 108 transitions, 910 flow. Second operand 15 states and 1171 transitions. [2023-01-28 11:36:55,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 157 transitions, 1466 flow [2023-01-28 11:36:55,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 157 transitions, 1410 flow, removed 16 selfloop flow, removed 9 redundant places. [2023-01-28 11:36:55,303 INFO L231 Difference]: Finished difference. Result has 86 places, 122 transitions, 1105 flow [2023-01-28 11:36:55,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1105, PETRI_PLACES=86, PETRI_TRANSITIONS=122} [2023-01-28 11:36:55,303 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-01-28 11:36:55,304 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 122 transitions, 1105 flow [2023-01-28 11:36:55,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 75.10526315789474) internal successors, (1427), 19 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:55,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:36:55,304 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:36:55,310 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 11:36:55,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:36:55,510 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:36:55,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:36:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash 232462075, now seen corresponding path program 4 times [2023-01-28 11:36:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:36:55,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109940308] [2023-01-28 11:36:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:36:55,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:36:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:36:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:36:56,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:36:56,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109940308] [2023-01-28 11:36:56,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109940308] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:36:56,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058144929] [2023-01-28 11:36:56,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:36:56,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:36:56,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:36:56,475 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:36:56,522 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 11:36:56,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:36:56,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:36:56,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-28 11:36:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:36:56,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:36:56,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:36:56,726 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 11:36:56,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:36:56,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:36:56,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-01-28 11:36:56,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-28 11:36:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:36:56,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058144929] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 11:36:56,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 11:36:56,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 18 [2023-01-28 11:36:56,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788263726] [2023-01-28 11:36:56,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:36:56,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 11:36:56,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:36:56,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 11:36:56,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=294, Unknown=4, NotChecked=0, Total=342 [2023-01-28 11:36:56,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 249 [2023-01-28 11:36:56,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 122 transitions, 1105 flow. Second operand has 6 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:56,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:36:56,868 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 249 [2023-01-28 11:36:56,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:36:57,055 INFO L130 PetriNetUnfolder]: 354/698 cut-off events. [2023-01-28 11:36:57,055 INFO L131 PetriNetUnfolder]: For 2563/2573 co-relation queries the response was YES. [2023-01-28 11:36:57,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3354 conditions, 698 events. 354/698 cut-off events. For 2563/2573 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3335 event pairs, 30 based on Foata normal form. 18/666 useless extension candidates. Maximal degree in co-relation 3031. Up to 445 conditions per place. [2023-01-28 11:36:57,061 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 113 selfloop transitions, 32 changer transitions 0/148 dead transitions. [2023-01-28 11:36:57,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 148 transitions, 1548 flow [2023-01-28 11:36:57,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:36:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:36:57,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 494 transitions. [2023-01-28 11:36:57,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3967871485943775 [2023-01-28 11:36:57,063 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 494 transitions. [2023-01-28 11:36:57,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 494 transitions. [2023-01-28 11:36:57,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:36:57,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 494 transitions. [2023-01-28 11:36:57,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 98.8) internal successors, (494), 5 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:57,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:57,068 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 249.0) internal successors, (1494), 6 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:57,068 INFO L175 Difference]: Start difference. First operand has 86 places, 122 transitions, 1105 flow. Second operand 5 states and 494 transitions. [2023-01-28 11:36:57,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 148 transitions, 1548 flow [2023-01-28 11:36:57,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 148 transitions, 1473 flow, removed 23 selfloop flow, removed 6 redundant places. [2023-01-28 11:36:57,082 INFO L231 Difference]: Finished difference. Result has 86 places, 123 transitions, 1175 flow [2023-01-28 11:36:57,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1175, PETRI_PLACES=86, PETRI_TRANSITIONS=123} [2023-01-28 11:36:57,084 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 65 predicate places. [2023-01-28 11:36:57,085 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 123 transitions, 1175 flow [2023-01-28 11:36:57,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 94.33333333333333) internal successors, (566), 6 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:57,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:36:57,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:36:57,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 11:36:57,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:36:57,301 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:36:57,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:36:57,301 INFO L85 PathProgramCache]: Analyzing trace with hash -496561753, now seen corresponding path program 2 times [2023-01-28 11:36:57,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:36:57,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82001527] [2023-01-28 11:36:57,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:36:57,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:36:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:36:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:36:57,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:36:57,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82001527] [2023-01-28 11:36:57,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82001527] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:36:57,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028002310] [2023-01-28 11:36:57,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:36:57,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:36:57,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:36:57,798 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 11:36:57,800 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 11:36:57,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:36:57,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:36:57,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 11:36:57,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:36:58,064 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 11 treesize of output 3 [2023-01-28 11:36:58,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:36:58,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:36:58,289 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:36:58,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2023-01-28 11:36:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:36:58,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028002310] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:36:58,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:36:58,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-01-28 11:36:58,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393408462] [2023-01-28 11:36:58,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:36:58,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 11:36:58,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:36:58,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 11:36:58,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2023-01-28 11:36:58,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 249 [2023-01-28 11:36:58,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 123 transitions, 1175 flow. Second operand has 26 states, 26 states have (on average 74.8076923076923) internal successors, (1945), 26 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:36:58,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:36:58,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 249 [2023-01-28 11:36:58,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:00,265 INFO L130 PetriNetUnfolder]: 656/1307 cut-off events. [2023-01-28 11:37:00,265 INFO L131 PetriNetUnfolder]: For 5494/5494 co-relation queries the response was YES. [2023-01-28 11:37:00,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6335 conditions, 1307 events. 656/1307 cut-off events. For 5494/5494 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 7763 event pairs, 41 based on Foata normal form. 13/1259 useless extension candidates. Maximal degree in co-relation 5640. Up to 648 conditions per place. [2023-01-28 11:37:00,275 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 185 selfloop transitions, 110 changer transitions 36/332 dead transitions. [2023-01-28 11:37:00,275 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 332 transitions, 3248 flow [2023-01-28 11:37:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 11:37:00,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 11:37:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2520 transitions. [2023-01-28 11:37:00,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31626506024096385 [2023-01-28 11:37:00,282 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2520 transitions. [2023-01-28 11:37:00,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2520 transitions. [2023-01-28 11:37:00,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:00,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2520 transitions. [2023-01-28 11:37:00,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 78.75) internal successors, (2520), 32 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:00,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 249.0) internal successors, (8217), 33 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:00,299 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 249.0) internal successors, (8217), 33 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:00,299 INFO L175 Difference]: Start difference. First operand has 86 places, 123 transitions, 1175 flow. Second operand 32 states and 2520 transitions. [2023-01-28 11:37:00,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 332 transitions, 3248 flow [2023-01-28 11:37:00,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 332 transitions, 3169 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-01-28 11:37:00,322 INFO L231 Difference]: Finished difference. Result has 134 places, 203 transitions, 2392 flow [2023-01-28 11:37:00,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2392, PETRI_PLACES=134, PETRI_TRANSITIONS=203} [2023-01-28 11:37:00,322 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 113 predicate places. [2023-01-28 11:37:00,323 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 203 transitions, 2392 flow [2023-01-28 11:37:00,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 74.8076923076923) internal successors, (1945), 26 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:00,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:00,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:00,329 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 11:37:00,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:00,529 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:00,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:00,530 INFO L85 PathProgramCache]: Analyzing trace with hash -840816843, now seen corresponding path program 3 times [2023-01-28 11:37:00,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:00,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309592707] [2023-01-28 11:37:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:00,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:01,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:01,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309592707] [2023-01-28 11:37:01,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309592707] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:01,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956880263] [2023-01-28 11:37:01,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:37:01,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:01,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:01,120 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 11:37:01,124 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 11:37:01,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:37:01,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:37:01,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 11:37:01,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:01,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:37:01,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-01-28 11:37:01,617 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:37:01,619 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:01,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-01-28 11:37:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:01,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:37:01,855 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:01,856 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 86 treesize of output 70 [2023-01-28 11:37:01,866 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 51 [2023-01-28 11:37:01,870 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 51 treesize of output 45 [2023-01-28 11:37:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:02,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956880263] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:37:02,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:37:02,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-01-28 11:37:02,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571181107] [2023-01-28 11:37:02,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:37:02,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 11:37:02,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:37:02,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 11:37:02,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=636, Unknown=1, NotChecked=0, Total=756 [2023-01-28 11:37:02,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-01-28 11:37:02,113 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 203 transitions, 2392 flow. Second operand has 28 states, 28 states have (on average 70.71428571428571) internal successors, (1980), 28 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:02,113 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:37:02,113 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-01-28 11:37:02,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:09,676 INFO L130 PetriNetUnfolder]: 724/1451 cut-off events. [2023-01-28 11:37:09,676 INFO L131 PetriNetUnfolder]: For 9529/9529 co-relation queries the response was YES. [2023-01-28 11:37:09,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8283 conditions, 1451 events. 724/1451 cut-off events. For 9529/9529 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8872 event pairs, 46 based on Foata normal form. 9/1429 useless extension candidates. Maximal degree in co-relation 8184. Up to 902 conditions per place. [2023-01-28 11:37:09,689 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 184 selfloop transitions, 116 changer transitions 7/308 dead transitions. [2023-01-28 11:37:09,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 308 transitions, 3873 flow [2023-01-28 11:37:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 11:37:09,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 11:37:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1633 transitions. [2023-01-28 11:37:09,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29810149689667764 [2023-01-28 11:37:09,693 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1633 transitions. [2023-01-28 11:37:09,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1633 transitions. [2023-01-28 11:37:09,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:09,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1633 transitions. [2023-01-28 11:37:09,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 74.22727272727273) internal successors, (1633), 22 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:09,713 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 249.0) internal successors, (5727), 23 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:09,715 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 249.0) internal successors, (5727), 23 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:09,715 INFO L175 Difference]: Start difference. First operand has 134 places, 203 transitions, 2392 flow. Second operand 22 states and 1633 transitions. [2023-01-28 11:37:09,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 308 transitions, 3873 flow [2023-01-28 11:37:09,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 308 transitions, 3651 flow, removed 94 selfloop flow, removed 13 redundant places. [2023-01-28 11:37:09,777 INFO L231 Difference]: Finished difference. Result has 148 places, 246 transitions, 3162 flow [2023-01-28 11:37:09,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3162, PETRI_PLACES=148, PETRI_TRANSITIONS=246} [2023-01-28 11:37:09,778 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 127 predicate places. [2023-01-28 11:37:09,778 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 246 transitions, 3162 flow [2023-01-28 11:37:09,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 70.71428571428571) internal successors, (1980), 28 states have internal predecessors, (1980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:09,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:09,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:09,787 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 11:37:09,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:09,985 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:09,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:09,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1371086443, now seen corresponding path program 4 times [2023-01-28 11:37:09,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:09,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684020182] [2023-01-28 11:37:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:09,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:10,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:10,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684020182] [2023-01-28 11:37:10,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684020182] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:10,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2929449] [2023-01-28 11:37:10,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:37:10,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:10,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:10,629 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 11:37:10,648 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 11:37:10,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:37:10,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:37:10,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 11:37:10,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:10,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:37:10,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:37:10,956 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 11:37:10,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:37:11,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:11,061 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 86 treesize of output 70 [2023-01-28 11:37:11,064 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 45 [2023-01-28 11:37:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:37:11,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2929449] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:37:11,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:37:11,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2023-01-28 11:37:11,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587470255] [2023-01-28 11:37:11,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:37:11,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 11:37:11,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:37:11,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 11:37:11,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=578, Unknown=1, NotChecked=0, Total=650 [2023-01-28 11:37:11,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-01-28 11:37:11,168 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 246 transitions, 3162 flow. Second operand has 26 states, 26 states have (on average 70.76923076923077) internal successors, (1840), 26 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:11,168 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:37:11,168 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-01-28 11:37:11,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:12,059 INFO L130 PetriNetUnfolder]: 740/1503 cut-off events. [2023-01-28 11:37:12,060 INFO L131 PetriNetUnfolder]: For 10486/10486 co-relation queries the response was YES. [2023-01-28 11:37:12,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8968 conditions, 1503 events. 740/1503 cut-off events. For 10486/10486 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9349 event pairs, 128 based on Foata normal form. 2/1475 useless extension candidates. Maximal degree in co-relation 8719. Up to 1212 conditions per place. [2023-01-28 11:37:12,075 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 237 selfloop transitions, 42 changer transitions 16/296 dead transitions. [2023-01-28 11:37:12,075 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 296 transitions, 4072 flow [2023-01-28 11:37:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-01-28 11:37:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-01-28 11:37:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1186 transitions. [2023-01-28 11:37:12,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2976907630522088 [2023-01-28 11:37:12,077 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1186 transitions. [2023-01-28 11:37:12,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1186 transitions. [2023-01-28 11:37:12,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:12,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1186 transitions. [2023-01-28 11:37:12,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 74.125) internal successors, (1186), 16 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:12,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:12,083 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 249.0) internal successors, (4233), 17 states have internal predecessors, (4233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:12,084 INFO L175 Difference]: Start difference. First operand has 148 places, 246 transitions, 3162 flow. Second operand 16 states and 1186 transitions. [2023-01-28 11:37:12,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 296 transitions, 4072 flow [2023-01-28 11:37:12,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 296 transitions, 3984 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-01-28 11:37:12,153 INFO L231 Difference]: Finished difference. Result has 158 places, 251 transitions, 3291 flow [2023-01-28 11:37:12,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=3084, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3291, PETRI_PLACES=158, PETRI_TRANSITIONS=251} [2023-01-28 11:37:12,154 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 137 predicate places. [2023-01-28 11:37:12,154 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 251 transitions, 3291 flow [2023-01-28 11:37:12,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 70.76923076923077) internal successors, (1840), 26 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:12,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:12,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:12,161 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 11:37:12,360 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,SelfDestructingSolverStorable10 [2023-01-28 11:37:12,360 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:12,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash -630894816, now seen corresponding path program 5 times [2023-01-28 11:37:12,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:12,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155366564] [2023-01-28 11:37:12,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:12,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:12,467 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 11:37:12,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:12,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155366564] [2023-01-28 11:37:12,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155366564] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:12,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107857796] [2023-01-28 11:37:12,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:37:12,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:12,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:12,469 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 11:37:12,471 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 11:37:12,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:37:12,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:37:12,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 11:37:12,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:12,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:37:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:12,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107857796] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:37:12,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:37:12,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2023-01-28 11:37:12,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366708155] [2023-01-28 11:37:12,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:37:12,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 11:37:12,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:37:12,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 11:37:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2023-01-28 11:37:12,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 249 [2023-01-28 11:37:12,859 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 251 transitions, 3291 flow. Second operand has 20 states, 20 states have (on average 96.3) internal successors, (1926), 20 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:12,859 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:37:12,859 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 249 [2023-01-28 11:37:12,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:13,314 INFO L130 PetriNetUnfolder]: 672/1440 cut-off events. [2023-01-28 11:37:13,314 INFO L131 PetriNetUnfolder]: For 13448/13456 co-relation queries the response was YES. [2023-01-28 11:37:13,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8584 conditions, 1440 events. 672/1440 cut-off events. For 13448/13456 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 9484 event pairs, 30 based on Foata normal form. 230/1637 useless extension candidates. Maximal degree in co-relation 8484. Up to 494 conditions per place. [2023-01-28 11:37:13,325 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 131 selfloop transitions, 68 changer transitions 99/302 dead transitions. [2023-01-28 11:37:13,325 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 302 transitions, 4174 flow [2023-01-28 11:37:13,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 11:37:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 11:37:13,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1405 transitions. [2023-01-28 11:37:13,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40304073436603555 [2023-01-28 11:37:13,328 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1405 transitions. [2023-01-28 11:37:13,328 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1405 transitions. [2023-01-28 11:37:13,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:13,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1405 transitions. [2023-01-28 11:37:13,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 100.35714285714286) internal successors, (1405), 14 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:13,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 249.0) internal successors, (3735), 15 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:13,334 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 249.0) internal successors, (3735), 15 states have internal predecessors, (3735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:13,334 INFO L175 Difference]: Start difference. First operand has 158 places, 251 transitions, 3291 flow. Second operand 14 states and 1405 transitions. [2023-01-28 11:37:13,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 302 transitions, 4174 flow [2023-01-28 11:37:13,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 302 transitions, 3950 flow, removed 64 selfloop flow, removed 15 redundant places. [2023-01-28 11:37:13,399 INFO L231 Difference]: Finished difference. Result has 154 places, 157 transitions, 2031 flow [2023-01-28 11:37:13,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2031, PETRI_PLACES=154, PETRI_TRANSITIONS=157} [2023-01-28 11:37:13,399 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 133 predicate places. [2023-01-28 11:37:13,400 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 157 transitions, 2031 flow [2023-01-28 11:37:13,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 96.3) internal successors, (1926), 20 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:13,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:13,400 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:13,409 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 11:37:13,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:13,606 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:13,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:13,606 INFO L85 PathProgramCache]: Analyzing trace with hash -557386816, now seen corresponding path program 6 times [2023-01-28 11:37:13,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:13,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129487280] [2023-01-28 11:37:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:13,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:14,449 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 11:37:14,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:14,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129487280] [2023-01-28 11:37:14,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129487280] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:14,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018750384] [2023-01-28 11:37:14,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:37:14,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:14,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:14,453 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 11:37:14,482 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 11:37:14,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:37:14,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:37:14,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 11:37:14,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:14,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:37:14,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:37:14,884 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 11:37:14,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:37:14,951 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_393 (Array Int Int))) (<= c_~N~0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_393) c_~q~0.base) .cse0)))) (forall ((v_ArrVal_393 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_393) c_~q~0.base) .cse0)) (+ c_~N~0 1))))) is different from false [2023-01-28 11:37:15,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:15,012 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 86 treesize of output 70 [2023-01-28 11:37:15,020 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 51 [2023-01-28 11:37:15,024 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 51 treesize of output 45 [2023-01-28 11:37:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:37:15,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018750384] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:37:15,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:37:15,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 26 [2023-01-28 11:37:15,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069395880] [2023-01-28 11:37:15,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:37:15,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 11:37:15,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:37:15,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 11:37:15,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=623, Unknown=1, NotChecked=50, Total=756 [2023-01-28 11:37:15,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-01-28 11:37:15,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 157 transitions, 2031 flow. Second operand has 28 states, 28 states have (on average 70.67857142857143) internal successors, (1979), 28 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:15,153 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:37:15,153 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-01-28 11:37:15,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:16,356 INFO L130 PetriNetUnfolder]: 420/936 cut-off events. [2023-01-28 11:37:16,356 INFO L131 PetriNetUnfolder]: For 7503/7503 co-relation queries the response was YES. [2023-01-28 11:37:16,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5835 conditions, 936 events. 420/936 cut-off events. For 7503/7503 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5510 event pairs, 60 based on Foata normal form. 2/909 useless extension candidates. Maximal degree in co-relation 5780. Up to 732 conditions per place. [2023-01-28 11:37:16,365 INFO L137 encePairwiseOnDemand]: 237/249 looper letters, 150 selfloop transitions, 29 changer transitions 35/215 dead transitions. [2023-01-28 11:37:16,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 215 transitions, 2898 flow [2023-01-28 11:37:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 11:37:16,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 11:37:16,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1470 transitions. [2023-01-28 11:37:16,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29518072289156627 [2023-01-28 11:37:16,368 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1470 transitions. [2023-01-28 11:37:16,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1470 transitions. [2023-01-28 11:37:16,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:16,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1470 transitions. [2023-01-28 11:37:16,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 73.5) internal successors, (1470), 20 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:16,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 249.0) internal successors, (5229), 21 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:16,374 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 249.0) internal successors, (5229), 21 states have internal predecessors, (5229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:16,374 INFO L175 Difference]: Start difference. First operand has 154 places, 157 transitions, 2031 flow. Second operand 20 states and 1470 transitions. [2023-01-28 11:37:16,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 215 transitions, 2898 flow [2023-01-28 11:37:16,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 215 transitions, 2620 flow, removed 100 selfloop flow, removed 22 redundant places. [2023-01-28 11:37:16,400 INFO L231 Difference]: Finished difference. Result has 136 places, 156 transitions, 1880 flow [2023-01-28 11:37:16,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1880, PETRI_PLACES=136, PETRI_TRANSITIONS=156} [2023-01-28 11:37:16,401 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 115 predicate places. [2023-01-28 11:37:16,401 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 156 transitions, 1880 flow [2023-01-28 11:37:16,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 70.67857142857143) internal successors, (1979), 28 states have internal predecessors, (1979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:16,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:16,401 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:16,408 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 11:37:16,602 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,SelfDestructingSolverStorable12 [2023-01-28 11:37:16,602 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:16,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash -565204940, now seen corresponding path program 7 times [2023-01-28 11:37:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:16,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219987959] [2023-01-28 11:37:16,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:16,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:17,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:17,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219987959] [2023-01-28 11:37:17,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219987959] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:17,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996402586] [2023-01-28 11:37:17,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:37:17,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:17,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:17,243 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 11:37:17,245 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 11:37:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:17,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 11:37:17,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:17,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:37:17,720 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:37:17,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 11:37:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:18,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996402586] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:37:18,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:37:18,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-01-28 11:37:18,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522571001] [2023-01-28 11:37:18,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:37:18,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 11:37:18,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:37:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 11:37:18,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2023-01-28 11:37:18,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 249 [2023-01-28 11:37:18,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 156 transitions, 1880 flow. Second operand has 31 states, 31 states have (on average 76.64516129032258) internal successors, (2376), 31 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:18,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:37:18,098 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 249 [2023-01-28 11:37:18,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:20,885 INFO L130 PetriNetUnfolder]: 812/1715 cut-off events. [2023-01-28 11:37:20,885 INFO L131 PetriNetUnfolder]: For 9754/9754 co-relation queries the response was YES. [2023-01-28 11:37:20,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10231 conditions, 1715 events. 812/1715 cut-off events. For 9754/9754 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11081 event pairs, 45 based on Foata normal form. 66/1720 useless extension candidates. Maximal degree in co-relation 10186. Up to 682 conditions per place. [2023-01-28 11:37:20,900 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 232 selfloop transitions, 193 changer transitions 38/464 dead transitions. [2023-01-28 11:37:20,900 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 464 transitions, 5595 flow [2023-01-28 11:37:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 11:37:20,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 11:37:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3573 transitions. [2023-01-28 11:37:20,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3261226725082147 [2023-01-28 11:37:20,905 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3573 transitions. [2023-01-28 11:37:20,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3573 transitions. [2023-01-28 11:37:20,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:20,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3573 transitions. [2023-01-28 11:37:20,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 81.20454545454545) internal successors, (3573), 44 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:20,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 249.0) internal successors, (11205), 45 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:20,917 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 249.0) internal successors, (11205), 45 states have internal predecessors, (11205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:20,917 INFO L175 Difference]: Start difference. First operand has 136 places, 156 transitions, 1880 flow. Second operand 44 states and 3573 transitions. [2023-01-28 11:37:20,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 464 transitions, 5595 flow [2023-01-28 11:37:20,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 464 transitions, 5125 flow, removed 213 selfloop flow, removed 13 redundant places. [2023-01-28 11:37:20,957 INFO L231 Difference]: Finished difference. Result has 179 places, 286 transitions, 4127 flow [2023-01-28 11:37:20,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=1770, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=4127, PETRI_PLACES=179, PETRI_TRANSITIONS=286} [2023-01-28 11:37:20,957 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 158 predicate places. [2023-01-28 11:37:20,958 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 286 transitions, 4127 flow [2023-01-28 11:37:20,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 76.64516129032258) internal successors, (2376), 31 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:20,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:20,958 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:20,966 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 11:37:21,163 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,SelfDestructingSolverStorable13 [2023-01-28 11:37:21,164 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:21,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1324482178, now seen corresponding path program 8 times [2023-01-28 11:37:21,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:21,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523902295] [2023-01-28 11:37:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:21,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:21,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:21,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:21,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523902295] [2023-01-28 11:37:21,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523902295] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:21,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263451683] [2023-01-28 11:37:21,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:37:21,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:21,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:21,581 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 11:37:21,584 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 11:37:21,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:37:21,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:37:21,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 11:37:21,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:21,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:21,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:37:21,943 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:37:21,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 11:37:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:22,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263451683] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:37:22,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:37:22,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 27 [2023-01-28 11:37:22,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635376040] [2023-01-28 11:37:22,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:37:22,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 11:37:22,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:37:22,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 11:37:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2023-01-28 11:37:22,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 249 [2023-01-28 11:37:22,174 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 286 transitions, 4127 flow. Second operand has 28 states, 28 states have (on average 85.64285714285714) internal successors, (2398), 28 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:22,174 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:37:22,174 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 249 [2023-01-28 11:37:22,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:23,995 INFO L130 PetriNetUnfolder]: 918/1950 cut-off events. [2023-01-28 11:37:23,995 INFO L131 PetriNetUnfolder]: For 20049/20057 co-relation queries the response was YES. [2023-01-28 11:37:24,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13166 conditions, 1950 events. 918/1950 cut-off events. For 20049/20057 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12686 event pairs, 81 based on Foata normal form. 177/2101 useless extension candidates. Maximal degree in co-relation 13106. Up to 1014 conditions per place. [2023-01-28 11:37:24,009 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 244 selfloop transitions, 144 changer transitions 60/453 dead transitions. [2023-01-28 11:37:24,009 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 453 transitions, 6525 flow [2023-01-28 11:37:24,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 11:37:24,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 11:37:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3756 transitions. [2023-01-28 11:37:24,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3591508892713712 [2023-01-28 11:37:24,014 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3756 transitions. [2023-01-28 11:37:24,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3756 transitions. [2023-01-28 11:37:24,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:24,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3756 transitions. [2023-01-28 11:37:24,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 89.42857142857143) internal successors, (3756), 42 states have internal predecessors, (3756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:24,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 249.0) internal successors, (10707), 43 states have internal predecessors, (10707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:24,027 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 249.0) internal successors, (10707), 43 states have internal predecessors, (10707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:24,027 INFO L175 Difference]: Start difference. First operand has 179 places, 286 transitions, 4127 flow. Second operand 42 states and 3756 transitions. [2023-01-28 11:37:24,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 453 transitions, 6525 flow [2023-01-28 11:37:24,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 453 transitions, 5635 flow, removed 373 selfloop flow, removed 26 redundant places. [2023-01-28 11:37:24,121 INFO L231 Difference]: Finished difference. Result has 199 places, 263 transitions, 4002 flow [2023-01-28 11:37:24,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=4002, PETRI_PLACES=199, PETRI_TRANSITIONS=263} [2023-01-28 11:37:24,121 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 178 predicate places. [2023-01-28 11:37:24,122 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 263 transitions, 4002 flow [2023-01-28 11:37:24,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.64285714285714) internal successors, (2398), 28 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:24,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:24,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:24,126 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 11:37:24,323 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,SelfDestructingSolverStorable14 [2023-01-28 11:37:24,323 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:24,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:24,323 INFO L85 PathProgramCache]: Analyzing trace with hash -472197264, now seen corresponding path program 9 times [2023-01-28 11:37:24,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:24,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847287996] [2023-01-28 11:37:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:24,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:24,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:24,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847287996] [2023-01-28 11:37:24,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847287996] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:24,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414994344] [2023-01-28 11:37:24,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:37:24,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:24,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:24,741 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 11:37:24,743 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 11:37:25,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:37:25,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:37:25,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 11:37:25,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:37:25,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:37:25,161 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:37:25,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 11:37:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:37:25,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414994344] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:37:25,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:37:25,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 16 [2023-01-28 11:37:25,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959167995] [2023-01-28 11:37:25,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:37:25,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 11:37:25,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:37:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 11:37:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-01-28 11:37:25,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 249 [2023-01-28 11:37:25,179 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 263 transitions, 4002 flow. Second operand has 17 states, 17 states have (on average 86.11764705882354) internal successors, (1464), 17 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:25,179 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:37:25,179 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 249 [2023-01-28 11:37:25,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:26,132 INFO L130 PetriNetUnfolder]: 796/1657 cut-off events. [2023-01-28 11:37:26,133 INFO L131 PetriNetUnfolder]: For 18513/18521 co-relation queries the response was YES. [2023-01-28 11:37:26,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11265 conditions, 1657 events. 796/1657 cut-off events. For 18513/18521 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10011 event pairs, 76 based on Foata normal form. 46/1675 useless extension candidates. Maximal degree in co-relation 11201. Up to 1174 conditions per place. [2023-01-28 11:37:26,147 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 226 selfloop transitions, 105 changer transitions 9/345 dead transitions. [2023-01-28 11:37:26,147 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 345 transitions, 5108 flow [2023-01-28 11:37:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 11:37:26,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 11:37:26,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2488 transitions. [2023-01-28 11:37:26,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3568559954102123 [2023-01-28 11:37:26,152 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2488 transitions. [2023-01-28 11:37:26,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2488 transitions. [2023-01-28 11:37:26,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:26,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2488 transitions. [2023-01-28 11:37:26,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 88.85714285714286) internal successors, (2488), 28 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:26,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 249.0) internal successors, (7221), 29 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:26,161 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 249.0) internal successors, (7221), 29 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:26,161 INFO L175 Difference]: Start difference. First operand has 199 places, 263 transitions, 4002 flow. Second operand 28 states and 2488 transitions. [2023-01-28 11:37:26,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 345 transitions, 5108 flow [2023-01-28 11:37:26,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 345 transitions, 4676 flow, removed 153 selfloop flow, removed 35 redundant places. [2023-01-28 11:37:26,257 INFO L231 Difference]: Finished difference. Result has 181 places, 261 transitions, 3856 flow [2023-01-28 11:37:26,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3856, PETRI_PLACES=181, PETRI_TRANSITIONS=261} [2023-01-28 11:37:26,258 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 160 predicate places. [2023-01-28 11:37:26,258 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 261 transitions, 3856 flow [2023-01-28 11:37:26,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 86.11764705882354) internal successors, (1464), 17 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:26,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:26,258 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:26,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 11:37:26,463 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,SelfDestructingSolverStorable15 [2023-01-28 11:37:26,463 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:26,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:26,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1695030954, now seen corresponding path program 10 times [2023-01-28 11:37:26,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:26,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781931440] [2023-01-28 11:37:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:26,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:27,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:27,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781931440] [2023-01-28 11:37:27,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781931440] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:27,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541594017] [2023-01-28 11:37:27,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:37:27,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:27,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:27,153 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 11:37:27,156 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 11:37:27,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:37:27,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:37:27,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 11:37:27,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:27,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:37:27,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:37:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:27,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:37:27,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:27,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-01-28 11:37:27,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 11:37:28,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:28,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541594017] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:37:28,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:37:28,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-01-28 11:37:28,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307239418] [2023-01-28 11:37:28,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:37:28,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 11:37:28,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:37:28,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 11:37:28,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2023-01-28 11:37:28,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 249 [2023-01-28 11:37:28,310 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 261 transitions, 3856 flow. Second operand has 31 states, 31 states have (on average 81.54838709677419) internal successors, (2528), 31 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:28,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:37:28,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 249 [2023-01-28 11:37:28,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:30,937 INFO L130 PetriNetUnfolder]: 1057/2211 cut-off events. [2023-01-28 11:37:30,938 INFO L131 PetriNetUnfolder]: For 21865/21883 co-relation queries the response was YES. [2023-01-28 11:37:30,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14284 conditions, 2211 events. 1057/2211 cut-off events. For 21865/21883 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14072 event pairs, 90 based on Foata normal form. 52/2220 useless extension candidates. Maximal degree in co-relation 14229. Up to 1076 conditions per place. [2023-01-28 11:37:30,960 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 222 selfloop transitions, 192 changer transitions 5/424 dead transitions. [2023-01-28 11:37:30,960 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 424 transitions, 6135 flow [2023-01-28 11:37:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 11:37:30,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 11:37:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2741 transitions. [2023-01-28 11:37:30,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34400100401606426 [2023-01-28 11:37:30,964 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2741 transitions. [2023-01-28 11:37:30,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2741 transitions. [2023-01-28 11:37:30,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:30,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2741 transitions. [2023-01-28 11:37:30,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 85.65625) internal successors, (2741), 32 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:30,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 249.0) internal successors, (8217), 33 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:30,974 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 249.0) internal successors, (8217), 33 states have internal predecessors, (8217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:30,974 INFO L175 Difference]: Start difference. First operand has 181 places, 261 transitions, 3856 flow. Second operand 32 states and 2741 transitions. [2023-01-28 11:37:30,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 424 transitions, 6135 flow [2023-01-28 11:37:31,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 424 transitions, 5778 flow, removed 98 selfloop flow, removed 20 redundant places. [2023-01-28 11:37:31,083 INFO L231 Difference]: Finished difference. Result has 200 places, 326 transitions, 5098 flow [2023-01-28 11:37:31,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=3585, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=5098, PETRI_PLACES=200, PETRI_TRANSITIONS=326} [2023-01-28 11:37:31,083 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 179 predicate places. [2023-01-28 11:37:31,083 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 326 transitions, 5098 flow [2023-01-28 11:37:31,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 81.54838709677419) internal successors, (2528), 31 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:31,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:31,084 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:31,094 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 11:37:31,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:31,294 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:31,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:31,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1736267358, now seen corresponding path program 11 times [2023-01-28 11:37:31,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:31,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105550132] [2023-01-28 11:37:31,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:31,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:31,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:31,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105550132] [2023-01-28 11:37:31,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105550132] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:31,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759677633] [2023-01-28 11:37:31,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:37:31,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:31,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:31,786 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 11:37:31,814 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 11:37:31,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:37:31,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:37:31,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 11:37:31,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:37:32,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 11:37:32,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:32,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:37:32,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:32,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-01-28 11:37:32,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 11:37:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:32,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759677633] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:37:32,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:37:32,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-28 11:37:32,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899193499] [2023-01-28 11:37:32,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:37:32,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 11:37:32,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:37:32,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 11:37:32,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=826, Unknown=3, NotChecked=0, Total=992 [2023-01-28 11:37:32,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 249 [2023-01-28 11:37:32,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 326 transitions, 5098 flow. Second operand has 32 states, 32 states have (on average 81.5625) internal successors, (2610), 32 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:32,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:37:32,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 249 [2023-01-28 11:37:32,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:35,075 INFO L130 PetriNetUnfolder]: 1387/2823 cut-off events. [2023-01-28 11:37:35,075 INFO L131 PetriNetUnfolder]: For 34631/34655 co-relation queries the response was YES. [2023-01-28 11:37:35,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19898 conditions, 2823 events. 1387/2823 cut-off events. For 34631/34655 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 18341 event pairs, 74 based on Foata normal form. 112/2896 useless extension candidates. Maximal degree in co-relation 19837. Up to 1474 conditions per place. [2023-01-28 11:37:35,096 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 286 selfloop transitions, 265 changer transitions 27/582 dead transitions. [2023-01-28 11:37:35,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 582 transitions, 9094 flow [2023-01-28 11:37:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 11:37:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 11:37:35,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3513 transitions. [2023-01-28 11:37:35,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3441081398765795 [2023-01-28 11:37:35,101 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3513 transitions. [2023-01-28 11:37:35,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3513 transitions. [2023-01-28 11:37:35,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:35,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3513 transitions. [2023-01-28 11:37:35,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 85.6829268292683) internal successors, (3513), 41 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:35,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 249.0) internal successors, (10458), 42 states have internal predecessors, (10458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:35,161 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 249.0) internal successors, (10458), 42 states have internal predecessors, (10458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:35,161 INFO L175 Difference]: Start difference. First operand has 200 places, 326 transitions, 5098 flow. Second operand 41 states and 3513 transitions. [2023-01-28 11:37:35,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 582 transitions, 9094 flow [2023-01-28 11:37:35,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 582 transitions, 8401 flow, removed 130 selfloop flow, removed 27 redundant places. [2023-01-28 11:37:35,304 INFO L231 Difference]: Finished difference. Result has 214 places, 395 transitions, 7156 flow [2023-01-28 11:37:35,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=7156, PETRI_PLACES=214, PETRI_TRANSITIONS=395} [2023-01-28 11:37:35,305 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2023-01-28 11:37:35,305 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 395 transitions, 7156 flow [2023-01-28 11:37:35,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 81.5625) internal successors, (2610), 32 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:35,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:35,305 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:35,313 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 11:37:35,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 11:37:35,511 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:35,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:35,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1061577117, now seen corresponding path program 12 times [2023-01-28 11:37:35,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:35,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601106830] [2023-01-28 11:37:35,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:35,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:35,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:36,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:36,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601106830] [2023-01-28 11:37:36,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601106830] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:36,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554461905] [2023-01-28 11:37:36,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:37:36,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:36,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:36,273 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 11:37:36,274 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 11:37:36,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:37:36,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:37:36,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 82 conjunts are in the unsatisfiable core [2023-01-28 11:37:36,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:36,434 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 11:37:36,466 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 11:37:36,502 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 11:37:36,564 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 11:37:36,606 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 11:37:36,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:36,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 7 [2023-01-28 11:37:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:37,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:37:38,779 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:38,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 128 [2023-01-28 11:37:38,806 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:38,807 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 325 treesize of output 319 [2023-01-28 11:37:38,843 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:38,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 283 treesize of output 255 [2023-01-28 11:37:38,876 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:38,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 175 [2023-01-28 11:37:40,802 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:40,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 230 treesize of output 128 [2023-01-28 11:37:40,826 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 11:37:40,827 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 691 treesize of output 615 [2023-01-28 11:37:40,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:37:40,856 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:37:40,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:37:40,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 167 [2023-01-28 11:37:40,880 INFO L321 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-01-28 11:37:40,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 203 treesize of output 147 [2023-01-28 11:37:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:41,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554461905] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:37:41,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:37:41,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 37 [2023-01-28 11:37:41,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746377503] [2023-01-28 11:37:41,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:37:41,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 11:37:41,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:37:41,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 11:37:41,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1265, Unknown=12, NotChecked=0, Total=1482 [2023-01-28 11:37:41,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-01-28 11:37:41,041 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 395 transitions, 7156 flow. Second operand has 39 states, 39 states have (on average 67.48717948717949) internal successors, (2632), 39 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:41,041 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:37:41,041 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-01-28 11:37:41,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:41,252 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse23 (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|)) (.cse26 (* 4 c_~q_back~0)) (.cse25 (* c_~q_front~0 4)) (.cse24 (+ c_~q_front~0 2))) (let ((.cse0 (<= c_~n~0 .cse24)) (.cse2 (+ .cse25 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse4 (+ .cse26 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ .cse26 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse6 (+ .cse25 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse14 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse15 (+ .cse23 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse9 (< c_~q_back~0 0)) (.cse10 (<= c_~n~0 c_~q_back~0)) (.cse11 (< .cse24 0))) (and (or .cse0 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (and (forall ((v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_630) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse3 (select .cse1 .cse6))) (or (< (+ c_~s~0 (select .cse1 .cse2) .cse3) 3) (not (= (select .cse1 .cse4) 1)) (= .cse3 0) (not (= (select .cse1 .cse5) 1)))))) (forall ((v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_630) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse8 (select .cse7 .cse6))) (or (not (= (select .cse7 .cse4) 1)) (= .cse8 0) (not (= (select .cse7 .cse5) 1)) (< 1 (+ c_~s~0 (select .cse7 .cse2) .cse8))))))) .cse9 .cse10 .cse11) (or .cse0 .cse9 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse10 (and (forall ((v_ArrVal_628 Int) (v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (let ((.cse12 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse14 .cse15 v_ArrVal_628)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_630) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse13 (select .cse12 .cse6))) (or (< 1 (+ c_~s~0 (select .cse12 .cse2) .cse13)) (not (= (select .cse12 .cse4) 1)) (not (= (select .cse12 .cse5) 1)) (= .cse13 0))))) (forall ((v_ArrVal_628 Int) (v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (let ((.cse16 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse14 .cse15 v_ArrVal_628)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_630) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse17 (select .cse16 .cse6))) (or (not (= (select .cse16 .cse4) 1)) (< (+ c_~s~0 (select .cse16 .cse2) .cse17) 3) (not (= (select .cse16 .cse5) 1)) (= .cse17 0)))))) .cse11) (or .cse0 (let ((.cse20 (+ .cse23 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_628 Int) (v_ArrVal_627 Int) (v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (let ((.cse19 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store .cse14 .cse15 v_ArrVal_627) .cse20 v_ArrVal_628)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_630) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse18 (select .cse19 .cse6))) (or (< 1 (+ c_~s~0 .cse18 (select .cse19 .cse2))) (not (= (select .cse19 .cse4) 1)) (= .cse18 0) (not (= (select .cse19 .cse5) 1)))))) (forall ((v_ArrVal_628 Int) (v_ArrVal_627 Int) (v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (let ((.cse22 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (store .cse14 .cse15 v_ArrVal_627) .cse20 v_ArrVal_628)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_630) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse21 (select .cse22 .cse6))) (or (< (+ c_~s~0 .cse21 (select .cse22 .cse2)) 3) (not (= (select .cse22 .cse4) 1)) (= .cse21 0) (not (= (select .cse22 .cse5) 1)))))))) (< (+ 2 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse9 .cse10 .cse11)))) is different from false [2023-01-28 11:37:44,057 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 11:37:44,090 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse30 (+ c_~q_front~0 2)) (.cse29 (* c_~q_front~0 4)) (.cse31 (* 4 c_~q_back~0))) (let ((.cse4 (+ .cse31 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ .cse29 4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ .cse31 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse6 (+ .cse29 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse0 (<= c_~n~0 .cse30)) (.cse20 (+ c_~q~0.offset .cse31)) (.cse21 (+ c_~q~0.offset .cse31 4)) (.cse9 (< c_~q_back~0 0)) (.cse22 (+ .cse29 c_~q~0.offset 4)) (.cse10 (<= c_~n~0 c_~q_back~0)) (.cse11 (< .cse30 0)) (.cse23 (+ .cse29 c_~q~0.offset))) (and (or .cse0 (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (and (forall ((v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_630) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse3 (select .cse1 .cse6))) (or (< (+ c_~s~0 (select .cse1 .cse2) .cse3) 3) (not (= (select .cse1 .cse4) 1)) (= .cse3 0) (not (= (select .cse1 .cse5) 1)))))) (forall ((v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_630) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse8 (select .cse7 .cse6))) (or (not (= (select .cse7 .cse4) 1)) (= .cse8 0) (not (= (select .cse7 .cse5) 1)) (< 1 (+ c_~s~0 (select .cse7 .cse2) .cse8))))))) .cse9 .cse10 .cse11) (or .cse0 .cse9 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse10 (let ((.cse14 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse15 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_628 Int) (v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (let ((.cse12 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse14 .cse15 v_ArrVal_628)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_630) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse13 (select .cse12 .cse6))) (or (< 1 (+ c_~s~0 (select .cse12 .cse2) .cse13)) (not (= (select .cse12 .cse4) 1)) (not (= (select .cse12 .cse5) 1)) (= .cse13 0))))) (forall ((v_ArrVal_628 Int) (v_ArrVal_630 (Array Int Int)) (v_ArrVal_631 (Array Int Int))) (let ((.cse16 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse14 .cse15 v_ArrVal_628)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_630) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse17 (select .cse16 .cse6))) (or (not (= (select .cse16 .cse4) 1)) (< (+ c_~s~0 (select .cse16 .cse2) .cse17) 3) (not (= (select .cse16 .cse5) 1)) (= .cse17 0))))))) .cse11) (or .cse0 .cse9 .cse10 (and (forall ((v_ArrVal_631 (Array Int Int))) (let ((.cse19 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) c_~q~0.base))) (let ((.cse18 (select .cse19 .cse23))) (or (= 0 .cse18) (not (= (select .cse19 .cse20) 1)) (not (= (select .cse19 .cse21) 1)) (< (+ c_~s~0 (select .cse19 .cse22) .cse18) 3))))) (forall ((v_ArrVal_631 (Array Int Int))) (let ((.cse25 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_631) c_~q~0.base))) (let ((.cse24 (select .cse25 .cse23))) (or (= 0 .cse24) (< 1 (+ c_~s~0 (select .cse25 .cse22) .cse24)) (not (= (select .cse25 .cse20) 1)) (not (= (select .cse25 .cse21) 1))))))) .cse11) (let ((.cse26 (select |c_#memory_int| c_~q~0.base))) (let ((.cse27 (select .cse26 .cse23))) (or .cse0 (not (= (select .cse26 .cse20) 1)) (not (= (select .cse26 .cse21) 1)) .cse9 (= .cse27 0) (let ((.cse28 (+ c_~s~0 .cse27 (select .cse26 .cse22)))) (and (< .cse28 3) (< 1 .cse28))) .cse10 .cse11)))))) is different from false [2023-01-28 11:37:48,630 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 11:37:50,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:37:53,919 INFO L130 PetriNetUnfolder]: 1545/3210 cut-off events. [2023-01-28 11:37:53,919 INFO L131 PetriNetUnfolder]: For 42586/42586 co-relation queries the response was YES. [2023-01-28 11:37:53,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23688 conditions, 3210 events. 1545/3210 cut-off events. For 42586/42586 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 21687 event pairs, 472 based on Foata normal form. 8/3197 useless extension candidates. Maximal degree in co-relation 23622. Up to 2662 conditions per place. [2023-01-28 11:37:53,942 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 426 selfloop transitions, 97 changer transitions 53/577 dead transitions. [2023-01-28 11:37:53,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 577 transitions, 10413 flow [2023-01-28 11:37:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-01-28 11:37:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-01-28 11:37:53,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3022 transitions. [2023-01-28 11:37:53,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2822452601102083 [2023-01-28 11:37:53,947 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3022 transitions. [2023-01-28 11:37:53,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3022 transitions. [2023-01-28 11:37:53,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:53,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3022 transitions. [2023-01-28 11:37:53,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 70.27906976744185) internal successors, (3022), 43 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:53,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 249.0) internal successors, (10956), 44 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:53,958 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 249.0) internal successors, (10956), 44 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:53,958 INFO L175 Difference]: Start difference. First operand has 214 places, 395 transitions, 7156 flow. Second operand 43 states and 3022 transitions. [2023-01-28 11:37:53,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 577 transitions, 10413 flow [2023-01-28 11:37:54,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 577 transitions, 9696 flow, removed 312 selfloop flow, removed 11 redundant places. [2023-01-28 11:37:54,189 INFO L231 Difference]: Finished difference. Result has 254 places, 455 transitions, 8066 flow [2023-01-28 11:37:54,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=6553, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=8066, PETRI_PLACES=254, PETRI_TRANSITIONS=455} [2023-01-28 11:37:54,190 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 233 predicate places. [2023-01-28 11:37:54,190 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 455 transitions, 8066 flow [2023-01-28 11:37:54,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 67.48717948717949) internal successors, (2632), 39 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:54,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:54,191 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:54,198 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 11:37:54,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:54,396 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:54,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:54,396 INFO L85 PathProgramCache]: Analyzing trace with hash 533531231, now seen corresponding path program 13 times [2023-01-28 11:37:54,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:54,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49954127] [2023-01-28 11:37:54,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:54,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:55,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:55,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:55,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49954127] [2023-01-28 11:37:55,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49954127] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:55,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968409347] [2023-01-28 11:37:55,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:37:55,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:55,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:55,307 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 11:37:55,309 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 11:37:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:55,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 26 conjunts are in the unsatisfiable core [2023-01-28 11:37:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:55,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:37:55,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 11:37:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:37:55,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:37:55,625 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_674 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_674) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2023-01-28 11:37:55,634 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:55,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-01-28 11:37:55,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 11:37:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:37:55,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968409347] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:37:55,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:37:55,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 25 [2023-01-28 11:37:55,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069107525] [2023-01-28 11:37:55,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:37:55,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 11:37:55,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:37:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 11:37:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=540, Unknown=1, NotChecked=46, Total=650 [2023-01-28 11:37:55,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 249 [2023-01-28 11:37:55,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 455 transitions, 8066 flow. Second operand has 26 states, 26 states have (on average 81.84615384615384) internal successors, (2128), 26 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 11:37:55,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:37:55,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 249 [2023-01-28 11:37:55,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:37:57,404 INFO L130 PetriNetUnfolder]: 1620/3277 cut-off events. [2023-01-28 11:37:57,405 INFO L131 PetriNetUnfolder]: For 43972/43984 co-relation queries the response was YES. [2023-01-28 11:37:57,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24348 conditions, 3277 events. 1620/3277 cut-off events. For 43972/43984 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 21890 event pairs, 94 based on Foata normal form. 46/3294 useless extension candidates. Maximal degree in co-relation 24259. Up to 2082 conditions per place. [2023-01-28 11:37:57,435 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 340 selfloop transitions, 209 changer transitions 0/557 dead transitions. [2023-01-28 11:37:57,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 557 transitions, 10498 flow [2023-01-28 11:37:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 11:37:57,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 11:37:57,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1526 transitions. [2023-01-28 11:37:57,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3404730031236055 [2023-01-28 11:37:57,437 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1526 transitions. [2023-01-28 11:37:57,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1526 transitions. [2023-01-28 11:37:57,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:37:57,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1526 transitions. [2023-01-28 11:37:57,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 84.77777777777777) internal successors, (1526), 18 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:57,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:57,441 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 249.0) internal successors, (4731), 19 states have internal predecessors, (4731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:37:57,442 INFO L175 Difference]: Start difference. First operand has 254 places, 455 transitions, 8066 flow. Second operand 18 states and 1526 transitions. [2023-01-28 11:37:57,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 557 transitions, 10498 flow [2023-01-28 11:37:57,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 557 transitions, 10338 flow, removed 66 selfloop flow, removed 17 redundant places. [2023-01-28 11:37:57,762 INFO L231 Difference]: Finished difference. Result has 249 places, 491 transitions, 9286 flow [2023-01-28 11:37:57,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7848, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=9286, PETRI_PLACES=249, PETRI_TRANSITIONS=491} [2023-01-28 11:37:57,763 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 228 predicate places. [2023-01-28 11:37:57,763 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 491 transitions, 9286 flow [2023-01-28 11:37:57,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 81.84615384615384) internal successors, (2128), 26 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 11:37:57,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:37:57,763 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:37:57,767 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 11:37:57,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:57,964 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:37:57,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:37:57,964 INFO L85 PathProgramCache]: Analyzing trace with hash 108522647, now seen corresponding path program 14 times [2023-01-28 11:37:57,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:37:57,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213903386] [2023-01-28 11:37:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:37:57,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:37:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:37:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:58,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:37:58,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213903386] [2023-01-28 11:37:58,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213903386] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:37:58,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141091616] [2023-01-28 11:37:58,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:37:58,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:37:58,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:37:58,839 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 11:37:58,841 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 11:37:58,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:37:58,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:37:58,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjunts are in the unsatisfiable core [2023-01-28 11:37:58,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:37:59,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:37:59,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:37:59,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:37:59,552 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 32 treesize of output 22 [2023-01-28 11:37:59,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:37:59,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:38:00,223 INFO L321 Elim1Store]: treesize reduction 8, result has 90.1 percent of original size [2023-01-28 11:38:00,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 130 [2023-01-28 11:38:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:38:01,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141091616] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:38:01,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:38:01,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-01-28 11:38:01,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846718248] [2023-01-28 11:38:01,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:38:01,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 11:38:01,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:38:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 11:38:01,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2023-01-28 11:38:01,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 249 [2023-01-28 11:38:01,374 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 491 transitions, 9286 flow. Second operand has 38 states, 38 states have (on average 74.52631578947368) internal successors, (2832), 38 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:01,374 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:38:01,374 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 249 [2023-01-28 11:38:01,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:38:06,819 INFO L130 PetriNetUnfolder]: 1781/3698 cut-off events. [2023-01-28 11:38:06,820 INFO L131 PetriNetUnfolder]: For 51950/51950 co-relation queries the response was YES. [2023-01-28 11:38:06,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27588 conditions, 3698 events. 1781/3698 cut-off events. For 51950/51950 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 25655 event pairs, 223 based on Foata normal form. 11/3684 useless extension candidates. Maximal degree in co-relation 27502. Up to 1385 conditions per place. [2023-01-28 11:38:06,853 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 357 selfloop transitions, 258 changer transitions 40/656 dead transitions. [2023-01-28 11:38:06,853 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 656 transitions, 12111 flow [2023-01-28 11:38:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 11:38:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 11:38:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2669 transitions. [2023-01-28 11:38:06,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3152610441767068 [2023-01-28 11:38:06,856 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2669 transitions. [2023-01-28 11:38:06,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2669 transitions. [2023-01-28 11:38:06,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:38:06,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2669 transitions. [2023-01-28 11:38:06,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 78.5) internal successors, (2669), 34 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:06,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 249.0) internal successors, (8715), 35 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:06,864 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 249.0) internal successors, (8715), 35 states have internal predecessors, (8715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:06,864 INFO L175 Difference]: Start difference. First operand has 249 places, 491 transitions, 9286 flow. Second operand 34 states and 2669 transitions. [2023-01-28 11:38:06,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 656 transitions, 12111 flow [2023-01-28 11:38:07,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 656 transitions, 11941 flow, removed 45 selfloop flow, removed 8 redundant places. [2023-01-28 11:38:07,194 INFO L231 Difference]: Finished difference. Result has 283 places, 527 transitions, 10620 flow [2023-01-28 11:38:07,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=9116, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=10620, PETRI_PLACES=283, PETRI_TRANSITIONS=527} [2023-01-28 11:38:07,195 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 262 predicate places. [2023-01-28 11:38:07,195 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 527 transitions, 10620 flow [2023-01-28 11:38:07,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 74.52631578947368) internal successors, (2832), 38 states have internal predecessors, (2832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:07,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:38:07,196 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:38:07,200 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 11:38:07,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:38:07,396 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:38:07,396 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:38:07,397 INFO L85 PathProgramCache]: Analyzing trace with hash 115815223, now seen corresponding path program 15 times [2023-01-28 11:38:07,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:38:07,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481382858] [2023-01-28 11:38:07,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:38:07,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:38:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:38:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:38:08,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:38:08,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481382858] [2023-01-28 11:38:08,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481382858] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:38:08,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070283559] [2023-01-28 11:38:08,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:38:08,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:38:08,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:38:08,392 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 11:38:08,397 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 11:38:08,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:38:08,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:38:08,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 62 conjunts are in the unsatisfiable core [2023-01-28 11:38:08,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:38:08,991 INFO L321 Elim1Store]: treesize reduction 19, result has 34.5 percent of original size [2023-01-28 11:38:08,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 22 [2023-01-28 11:38:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:38:09,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:38:09,700 INFO L321 Elim1Store]: treesize reduction 8, result has 90.1 percent of original size [2023-01-28 11:38:09,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 130 [2023-01-28 11:38:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:38:11,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070283559] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:38:11,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:38:11,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-01-28 11:38:11,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473737446] [2023-01-28 11:38:11,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:38:11,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 11:38:11,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:38:11,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 11:38:11,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1214, Unknown=0, NotChecked=0, Total=1406 [2023-01-28 11:38:11,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-01-28 11:38:11,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 527 transitions, 10620 flow. Second operand has 38 states, 38 states have (on average 67.52631578947368) internal successors, (2566), 38 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:11,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:38:11,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-01-28 11:38:11,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:38:18,020 INFO L130 PetriNetUnfolder]: 1924/4033 cut-off events. [2023-01-28 11:38:18,021 INFO L131 PetriNetUnfolder]: For 66612/66612 co-relation queries the response was YES. [2023-01-28 11:38:18,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32516 conditions, 4033 events. 1924/4033 cut-off events. For 66612/66612 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 28969 event pairs, 309 based on Foata normal form. 11/4037 useless extension candidates. Maximal degree in co-relation 32421. Up to 1593 conditions per place. [2023-01-28 11:38:18,055 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 368 selfloop transitions, 300 changer transitions 45/714 dead transitions. [2023-01-28 11:38:18,055 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 714 transitions, 14339 flow [2023-01-28 11:38:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 11:38:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 11:38:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2710 transitions. [2023-01-28 11:38:18,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28640879306700484 [2023-01-28 11:38:18,057 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2710 transitions. [2023-01-28 11:38:18,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2710 transitions. [2023-01-28 11:38:18,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:38:18,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2710 transitions. [2023-01-28 11:38:18,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 71.3157894736842) internal successors, (2710), 38 states have internal predecessors, (2710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:18,063 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 249.0) internal successors, (9711), 39 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:18,064 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 249.0) internal successors, (9711), 39 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:18,064 INFO L175 Difference]: Start difference. First operand has 283 places, 527 transitions, 10620 flow. Second operand 38 states and 2710 transitions. [2023-01-28 11:38:18,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 714 transitions, 14339 flow [2023-01-28 11:38:18,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 714 transitions, 13793 flow, removed 241 selfloop flow, removed 20 redundant places. [2023-01-28 11:38:18,485 INFO L231 Difference]: Finished difference. Result has 303 places, 568 transitions, 12044 flow [2023-01-28 11:38:18,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=10276, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=253, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=12044, PETRI_PLACES=303, PETRI_TRANSITIONS=568} [2023-01-28 11:38:18,486 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 282 predicate places. [2023-01-28 11:38:18,486 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 568 transitions, 12044 flow [2023-01-28 11:38:18,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 67.52631578947368) internal successors, (2566), 38 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:18,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:38:18,486 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:38:18,491 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 11:38:18,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:38:18,687 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:38:18,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:38:18,687 INFO L85 PathProgramCache]: Analyzing trace with hash -121576027, now seen corresponding path program 16 times [2023-01-28 11:38:18,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:38:18,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198208012] [2023-01-28 11:38:18,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:38:18,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:38:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:38:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:38:19,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:38:19,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198208012] [2023-01-28 11:38:19,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198208012] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:38:19,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054117079] [2023-01-28 11:38:19,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:38:19,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:38:19,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:38:19,397 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 11:38:19,399 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 11:38:19,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:38:19,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:38:19,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 61 conjunts are in the unsatisfiable core [2023-01-28 11:38:19,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:38:19,827 INFO L321 Elim1Store]: treesize reduction 11, result has 42.1 percent of original size [2023-01-28 11:38:19,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 20 [2023-01-28 11:38:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:38:19,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:38:20,274 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 11:38:20,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 65 [2023-01-28 11:38:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:38:20,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054117079] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:38:20,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:38:20,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 33 [2023-01-28 11:38:20,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581221032] [2023-01-28 11:38:20,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:38:20,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 11:38:20,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:38:20,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 11:38:20,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 11:38:20,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 249 [2023-01-28 11:38:20,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 568 transitions, 12044 flow. Second operand has 35 states, 35 states have (on average 74.65714285714286) internal successors, (2613), 35 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:20,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:38:20,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 249 [2023-01-28 11:38:20,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:38:26,237 INFO L130 PetriNetUnfolder]: 2083/4389 cut-off events. [2023-01-28 11:38:26,237 INFO L131 PetriNetUnfolder]: For 77612/77612 co-relation queries the response was YES. [2023-01-28 11:38:26,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37085 conditions, 4389 events. 2083/4389 cut-off events. For 77612/77612 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 32542 event pairs, 325 based on Foata normal form. 19/4393 useless extension candidates. Maximal degree in co-relation 36986. Up to 1683 conditions per place. [2023-01-28 11:38:26,276 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 367 selfloop transitions, 360 changer transitions 47/775 dead transitions. [2023-01-28 11:38:26,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 775 transitions, 16691 flow [2023-01-28 11:38:26,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 11:38:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 11:38:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3046 transitions. [2023-01-28 11:38:26,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31366491607455466 [2023-01-28 11:38:26,279 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3046 transitions. [2023-01-28 11:38:26,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3046 transitions. [2023-01-28 11:38:26,280 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:38:26,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3046 transitions. [2023-01-28 11:38:26,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 78.1025641025641) internal successors, (3046), 39 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:26,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 249.0) internal successors, (9960), 40 states have internal predecessors, (9960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:26,289 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 249.0) internal successors, (9960), 40 states have internal predecessors, (9960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:26,289 INFO L175 Difference]: Start difference. First operand has 303 places, 568 transitions, 12044 flow. Second operand 39 states and 3046 transitions. [2023-01-28 11:38:26,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 775 transitions, 16691 flow [2023-01-28 11:38:26,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 775 transitions, 16185 flow, removed 208 selfloop flow, removed 24 redundant places. [2023-01-28 11:38:26,775 INFO L231 Difference]: Finished difference. Result has 320 places, 635 transitions, 14506 flow [2023-01-28 11:38:26,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=11552, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=14506, PETRI_PLACES=320, PETRI_TRANSITIONS=635} [2023-01-28 11:38:26,776 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 299 predicate places. [2023-01-28 11:38:26,776 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 635 transitions, 14506 flow [2023-01-28 11:38:26,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 74.65714285714286) internal successors, (2613), 35 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:26,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:38:26,776 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:38:26,781 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 11:38:26,977 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,SelfDestructingSolverStorable22 [2023-01-28 11:38:26,977 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:38:26,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:38:26,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1265938067, now seen corresponding path program 17 times [2023-01-28 11:38:26,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:38:26,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407040571] [2023-01-28 11:38:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:38:26,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:38:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:38:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:38:27,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:38:27,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407040571] [2023-01-28 11:38:27,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407040571] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:38:27,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242162392] [2023-01-28 11:38:27,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:38:27,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:38:27,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:38:27,709 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 11:38:27,712 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 11:38:27,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:38:27,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:38:27,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 48 conjunts are in the unsatisfiable core [2023-01-28 11:38:27,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:38:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:38:28,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:38:28,273 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:38:28,274 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 77 treesize of output 62 [2023-01-28 11:38:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:38:28,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242162392] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:38:28,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:38:28,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 25 [2023-01-28 11:38:28,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282851433] [2023-01-28 11:38:28,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:38:28,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 11:38:28,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:38:28,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 11:38:28,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2023-01-28 11:38:28,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 249 [2023-01-28 11:38:28,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 635 transitions, 14506 flow. Second operand has 27 states, 27 states have (on average 74.81481481481481) internal successors, (2020), 27 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:28,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:38:28,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 249 [2023-01-28 11:38:28,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:38:30,337 INFO L130 PetriNetUnfolder]: 2058/4281 cut-off events. [2023-01-28 11:38:30,338 INFO L131 PetriNetUnfolder]: For 84830/84830 co-relation queries the response was YES. [2023-01-28 11:38:30,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37934 conditions, 4281 events. 2058/4281 cut-off events. For 84830/84830 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 31122 event pairs, 776 based on Foata normal form. 8/4278 useless extension candidates. Maximal degree in co-relation 37830. Up to 3944 conditions per place. [2023-01-28 11:38:30,376 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 596 selfloop transitions, 80 changer transitions 38/715 dead transitions. [2023-01-28 11:38:30,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 715 transitions, 16701 flow [2023-01-28 11:38:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 11:38:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 11:38:30,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2243 transitions. [2023-01-28 11:38:30,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31062179753496744 [2023-01-28 11:38:30,379 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2243 transitions. [2023-01-28 11:38:30,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2243 transitions. [2023-01-28 11:38:30,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:38:30,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2243 transitions. [2023-01-28 11:38:30,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 77.34482758620689) internal successors, (2243), 29 states have internal predecessors, (2243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:30,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:30,387 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 249.0) internal successors, (7470), 30 states have internal predecessors, (7470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:30,387 INFO L175 Difference]: Start difference. First operand has 320 places, 635 transitions, 14506 flow. Second operand 29 states and 2243 transitions. [2023-01-28 11:38:30,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 715 transitions, 16701 flow [2023-01-28 11:38:30,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 715 transitions, 16066 flow, removed 195 selfloop flow, removed 17 redundant places. [2023-01-28 11:38:30,981 INFO L231 Difference]: Finished difference. Result has 336 places, 640 transitions, 14243 flow [2023-01-28 11:38:30,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=13846, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14243, PETRI_PLACES=336, PETRI_TRANSITIONS=640} [2023-01-28 11:38:30,982 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-01-28 11:38:30,982 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 640 transitions, 14243 flow [2023-01-28 11:38:30,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 74.81481481481481) internal successors, (2020), 27 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:30,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:38:30,982 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:38:30,987 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 11:38:31,183 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,SelfDestructingSolverStorable23 [2023-01-28 11:38:31,183 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:38:31,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:38:31,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1989533959, now seen corresponding path program 18 times [2023-01-28 11:38:31,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:38:31,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343767369] [2023-01-28 11:38:31,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:38:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:38:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:38:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:38:32,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:38:32,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343767369] [2023-01-28 11:38:32,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343767369] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:38:32,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289259442] [2023-01-28 11:38:32,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:38:32,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:38:32,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:38:32,178 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 11:38:32,203 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 11:38:32,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:38:32,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:38:32,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 11:38:32,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:38:32,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:38:32,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:38:32,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:38:32,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:38:32,713 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 29 treesize of output 29 [2023-01-28 11:38:32,921 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-01-28 11:38:32,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 15 [2023-01-28 11:38:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:38:32,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:38:33,273 WARN L839 $PredicateComparison]: unable to prove that (or (< c_~n~0 (+ c_~q_front~0 3)) (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse4 c_~q~0.offset)) (.cse2 (+ .cse4 c_~q~0.offset 4))) (and (forall ((v_ArrVal_870 (Array Int Int))) (<= c_~N~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_870) c_~q~0.base))) (+ c_~s~0 (select .cse0 .cse1) (select .cse0 .cse2))))) (forall ((v_ArrVal_870 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_870) c_~q~0.base))) (+ c_~s~0 (select .cse3 .cse1) (select .cse3 .cse2))) (+ c_~N~0 1)))))) (< c_~q_back~0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0)) is different from false [2023-01-28 11:38:33,381 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| c_~q~0.base))) (or (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< c_~n~0 (+ c_~q_front~0 3)) (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse5 c_~q~0.offset)) (.cse3 (+ .cse5 c_~q~0.offset 4))) (and (forall ((v_ArrVal_870 (Array Int Int))) (< (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_870) c_~q~0.base))) (+ c_~s~0 (select .cse1 .cse2) (select .cse1 .cse3))) (+ 3 |c_thread1Thread1of1ForFork1_~i~0#1|))) (forall ((v_ArrVal_870 (Array Int Int))) (< (+ |c_thread1Thread1of1ForFork1_~i~0#1| 1) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_870) c_~q~0.base))) (+ c_~s~0 (select .cse4 .cse2) (select .cse4 .cse3)))))))) (< c_~q_back~0 0) (<= c_~n~0 c_~q_back~0) (forall ((v_~q_back~0_206 Int)) (or (< v_~q_back~0_206 (+ c_~q_back~0 1)) (not (= (select .cse0 (+ c_~q~0.offset (* v_~q_back~0_206 4))) 1)) (< c_~n~0 (+ 2 v_~q_back~0_206)))))) is different from false [2023-01-28 11:38:33,407 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int| c_~q~0.base))) (or (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse4 c_~q~0.offset)) (.cse2 (+ .cse4 c_~q~0.offset 4))) (and (forall ((v_ArrVal_870 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_870) c_~q~0.base))) (+ c_~s~0 (select .cse0 .cse1) (select .cse0 .cse2))) 3)) (forall ((v_ArrVal_870 (Array Int Int))) (< 1 (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_870) c_~q~0.base))) (+ c_~s~0 (select .cse3 .cse1) (select .cse3 .cse2)))))))) (not (= (select .cse5 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< c_~n~0 (+ c_~q_front~0 3)) (< c_~q_back~0 0) (<= c_~n~0 c_~q_back~0) (forall ((v_~q_back~0_206 Int)) (or (< v_~q_back~0_206 (+ c_~q_back~0 1)) (not (= (select .cse5 (+ c_~q~0.offset (* v_~q_back~0_206 4))) 1)) (< c_~n~0 (+ 2 v_~q_back~0_206)))))) is different from false [2023-01-28 11:38:37,763 INFO L321 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2023-01-28 11:38:37,763 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 305 treesize of output 221 [2023-01-28 11:38:37,774 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:38:37,776 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2023-01-28 11:38:37,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:38:37,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 495 treesize of output 532 [2023-01-28 11:38:37,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 328 treesize of output 302 [2023-01-28 11:38:37,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:38:37,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 302 treesize of output 322 [2023-01-28 11:38:37,922 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:38:37,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 277 treesize of output 297 [2023-01-28 11:38:37,982 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:38:37,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 268 treesize of output 315 [2023-01-28 11:38:38,007 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:38:38,008 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 227 treesize of output 201 [2023-01-28 11:38:56,620 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 11:38:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-01-28 11:38:57,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289259442] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:38:57,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:38:57,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-01-28 11:38:57,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275147040] [2023-01-28 11:38:57,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:38:57,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 11:38:57,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:38:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 11:38:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1169, Unknown=6, NotChecked=216, Total=1560 [2023-01-28 11:38:57,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 249 [2023-01-28 11:38:57,488 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 640 transitions, 14243 flow. Second operand has 40 states, 40 states have (on average 67.45) internal successors, (2698), 40 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:38:57,488 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:38:57,488 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 249 [2023-01-28 11:38:57,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:38:58,595 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse10 (* c_~q_front~0 4))) (let ((.cse3 (< c_~q_back~0 0)) (.cse0 (< c_~n~0 (+ c_~q_front~0 3))) (.cse5 (+ .cse10 c_~q~0.offset)) (.cse6 (+ .cse10 c_~q~0.offset 4))) (and (or .cse0 (let ((.cse1 (< (+ 3 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)) (.cse2 (< c_~n~0 (+ 3 c_~q_back~0)))) (and (or (= c_~q_front~0 c_~q_back~0) .cse1 .cse2) (or (and (< c_~s~0 1) (not (= |c_ULTIMATE.start_main_~#t2~0#1.base| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) .cse1 .cse2) (or .cse1 .cse2 (< 0 (+ c_~s~0 1))) (or (< c_~n~0 (+ c_~q_front~0 4)) .cse1 .cse2))) .cse3) (or .cse0 (and (forall ((v_ArrVal_870 (Array Int Int))) (<= c_~N~0 (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_870) c_~q~0.base))) (+ c_~s~0 (select .cse4 .cse5) (select .cse4 .cse6))))) (forall ((v_ArrVal_870 (Array Int Int))) (< (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_870) c_~q~0.base))) (+ c_~s~0 (select .cse7 .cse5) (select .cse7 .cse6))) (+ c_~N~0 1)))) .cse3 (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (<= c_~n~0 c_~q_back~0)) (or (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) .cse0 (and (forall ((v_ArrVal_870 (Array Int Int))) (< (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_870) c_~q~0.base))) (+ c_~s~0 (select .cse8 .cse5) (select .cse8 .cse6))) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|))) (forall ((v_ArrVal_870 (Array Int Int))) (< |c_thread1Thread1of1ForFork1_~i~0#1| (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_870) c_~q~0.base))) (+ c_~s~0 (select .cse9 .cse5) (select .cse9 .cse6)))))) (< c_~n~0 1) (< c_~n~0 (+ 2 c_~q_back~0)))))) is different from false [2023-01-28 11:39:03,468 INFO L130 PetriNetUnfolder]: 2370/4912 cut-off events. [2023-01-28 11:39:03,469 INFO L131 PetriNetUnfolder]: For 91748/91748 co-relation queries the response was YES. [2023-01-28 11:39:03,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42302 conditions, 4912 events. 2370/4912 cut-off events. For 91748/91748 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 36188 event pairs, 546 based on Foata normal form. 8/4909 useless extension candidates. Maximal degree in co-relation 42193. Up to 2393 conditions per place. [2023-01-28 11:39:03,521 INFO L137 encePairwiseOnDemand]: 238/249 looper letters, 710 selfloop transitions, 85 changer transitions 44/840 dead transitions. [2023-01-28 11:39:03,521 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 840 transitions, 19260 flow [2023-01-28 11:39:03,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 11:39:03,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 11:39:03,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1705 transitions. [2023-01-28 11:39:03,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2853078982597055 [2023-01-28 11:39:03,523 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1705 transitions. [2023-01-28 11:39:03,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1705 transitions. [2023-01-28 11:39:03,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:39:03,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1705 transitions. [2023-01-28 11:39:03,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 71.04166666666667) internal successors, (1705), 24 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:39:03,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 249.0) internal successors, (6225), 25 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:39:03,529 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 249.0) internal successors, (6225), 25 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:39:03,530 INFO L175 Difference]: Start difference. First operand has 336 places, 640 transitions, 14243 flow. Second operand 24 states and 1705 transitions. [2023-01-28 11:39:03,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 840 transitions, 19260 flow [2023-01-28 11:39:04,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 840 transitions, 18825 flow, removed 162 selfloop flow, removed 24 redundant places. [2023-01-28 11:39:04,231 INFO L231 Difference]: Finished difference. Result has 336 places, 672 transitions, 15098 flow [2023-01-28 11:39:04,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=13918, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=15098, PETRI_PLACES=336, PETRI_TRANSITIONS=672} [2023-01-28 11:39:04,232 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 315 predicate places. [2023-01-28 11:39:04,232 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 672 transitions, 15098 flow [2023-01-28 11:39:04,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 67.45) internal successors, (2698), 40 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:39:04,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:39:04,232 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:39:04,236 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 11:39:04,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:39:04,433 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:39:04,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:39:04,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1766401221, now seen corresponding path program 19 times [2023-01-28 11:39:04,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:39:04,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177880903] [2023-01-28 11:39:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:39:04,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:39:04,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:39:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:39:05,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:39:05,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177880903] [2023-01-28 11:39:05,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177880903] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:39:05,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018956990] [2023-01-28 11:39:05,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:39:05,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:39:05,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:39:05,559 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 11:39:05,561 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 11:39:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:39:05,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 64 conjunts are in the unsatisfiable core [2023-01-28 11:39:05,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:39:05,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:39:05,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:39:06,174 INFO L321 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2023-01-28 11:39:06,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 22 [2023-01-28 11:39:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:39:06,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:39:06,812 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 11:39:06,812 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 310 treesize of output 254 [2023-01-28 11:39:06,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:39:06,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 213 treesize of output 200 [2023-01-28 11:39:06,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:39:06,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 168 [2023-01-28 11:39:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:39:08,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018956990] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:39:08,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:39:08,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-01-28 11:39:08,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017283467] [2023-01-28 11:39:08,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:39:08,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 11:39:08,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:39:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 11:39:08,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1221, Unknown=2, NotChecked=0, Total=1406 [2023-01-28 11:39:08,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-01-28 11:39:08,278 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 672 transitions, 15098 flow. Second operand has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 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 11:39:08,278 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:39:08,278 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-01-28 11:39:08,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:39:20,361 WARN L222 SmtUtils]: Spent 6.28s on a formula simplification. DAG size of input: 102 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:39:35,239 WARN L222 SmtUtils]: Spent 14.75s on a formula simplification. DAG size of input: 112 DAG size of output: 97 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:39:57,251 WARN L222 SmtUtils]: Spent 16.80s on a formula simplification. DAG size of input: 101 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:40:04,236 WARN L222 SmtUtils]: Spent 6.43s on a formula simplification. DAG size of input: 102 DAG size of output: 99 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:40:10,818 WARN L222 SmtUtils]: Spent 6.35s on a formula simplification. DAG size of input: 97 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:40:11,981 INFO L130 PetriNetUnfolder]: 2322/4797 cut-off events. [2023-01-28 11:40:11,982 INFO L131 PetriNetUnfolder]: For 91299/91299 co-relation queries the response was YES. [2023-01-28 11:40:12,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42632 conditions, 4797 events. 2322/4797 cut-off events. For 91299/91299 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 34879 event pairs, 241 based on Foata normal form. 4/4790 useless extension candidates. Maximal degree in co-relation 42519. Up to 1287 conditions per place. [2023-01-28 11:40:12,038 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 398 selfloop transitions, 379 changer transitions 11/789 dead transitions. [2023-01-28 11:40:12,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 789 transitions, 17755 flow [2023-01-28 11:40:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 11:40:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 11:40:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2301 transitions. [2023-01-28 11:40:12,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2980956082394092 [2023-01-28 11:40:12,041 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2301 transitions. [2023-01-28 11:40:12,041 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2301 transitions. [2023-01-28 11:40:12,041 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:12,042 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2301 transitions. [2023-01-28 11:40:12,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 74.2258064516129) internal successors, (2301), 31 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:12,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 249.0) internal successors, (7968), 32 states have internal predecessors, (7968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:12,049 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 249.0) internal successors, (7968), 32 states have internal predecessors, (7968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:12,049 INFO L175 Difference]: Start difference. First operand has 336 places, 672 transitions, 15098 flow. Second operand 31 states and 2301 transitions. [2023-01-28 11:40:12,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 789 transitions, 17755 flow [2023-01-28 11:40:12,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 789 transitions, 17519 flow, removed 61 selfloop flow, removed 21 redundant places. [2023-01-28 11:40:12,664 INFO L231 Difference]: Finished difference. Result has 341 places, 696 transitions, 16197 flow [2023-01-28 11:40:12,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=14904, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=16197, PETRI_PLACES=341, PETRI_TRANSITIONS=696} [2023-01-28 11:40:12,664 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 320 predicate places. [2023-01-28 11:40:12,665 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 696 transitions, 16197 flow [2023-01-28 11:40:12,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 70.52631578947368) internal successors, (2680), 38 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 11:40:12,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:12,665 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:12,669 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 11:40:12,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:12,866 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:12,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1094785749, now seen corresponding path program 20 times [2023-01-28 11:40:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:12,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093996461] [2023-01-28 11:40:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:13,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:13,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093996461] [2023-01-28 11:40:13,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093996461] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:13,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363127894] [2023-01-28 11:40:13,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:40:13,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:13,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:13,716 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 11:40:13,717 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 11:40:13,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:40:13,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:13,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-28 11:40:13,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:14,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:40:14,038 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 30 treesize of output 30 [2023-01-28 11:40:14,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:40:14,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:14,488 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:14,488 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 139 treesize of output 124 [2023-01-28 11:40:14,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:14,498 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 79 treesize of output 66 [2023-01-28 11:40:14,503 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:14,504 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 66 treesize of output 53 [2023-01-28 11:40:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:40:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363127894] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:14,669 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:14,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 32 [2023-01-28 11:40:14,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233596132] [2023-01-28 11:40:14,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:14,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 11:40:14,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:14,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 11:40:14,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1026, Unknown=2, NotChecked=0, Total=1122 [2023-01-28 11:40:14,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-01-28 11:40:14,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 696 transitions, 16197 flow. Second operand has 34 states, 34 states have (on average 70.6470588235294) internal successors, (2402), 34 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:14,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:14,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-01-28 11:40:14,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:18,058 INFO L130 PetriNetUnfolder]: 2417/5022 cut-off events. [2023-01-28 11:40:18,058 INFO L131 PetriNetUnfolder]: For 100648/100648 co-relation queries the response was YES. [2023-01-28 11:40:18,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46145 conditions, 5022 events. 2417/5022 cut-off events. For 100648/100648 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 37443 event pairs, 250 based on Foata normal form. 10/5021 useless extension candidates. Maximal degree in co-relation 46031. Up to 4103 conditions per place. [2023-01-28 11:40:18,112 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 631 selfloop transitions, 171 changer transitions 27/830 dead transitions. [2023-01-28 11:40:18,112 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 830 transitions, 19457 flow [2023-01-28 11:40:18,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 11:40:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 11:40:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2792 transitions. [2023-01-28 11:40:18,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29507503699006554 [2023-01-28 11:40:18,115 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2792 transitions. [2023-01-28 11:40:18,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2792 transitions. [2023-01-28 11:40:18,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:18,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2792 transitions. [2023-01-28 11:40:18,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 73.47368421052632) internal successors, (2792), 38 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:18,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 249.0) internal successors, (9711), 39 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:18,125 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 249.0) internal successors, (9711), 39 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:18,125 INFO L175 Difference]: Start difference. First operand has 341 places, 696 transitions, 16197 flow. Second operand 38 states and 2792 transitions. [2023-01-28 11:40:18,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 830 transitions, 19457 flow [2023-01-28 11:40:18,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 830 transitions, 19172 flow, removed 62 selfloop flow, removed 21 redundant places. [2023-01-28 11:40:18,906 INFO L231 Difference]: Finished difference. Result has 356 places, 726 transitions, 17189 flow [2023-01-28 11:40:18,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=15735, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=17189, PETRI_PLACES=356, PETRI_TRANSITIONS=726} [2023-01-28 11:40:18,907 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 335 predicate places. [2023-01-28 11:40:18,907 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 726 transitions, 17189 flow [2023-01-28 11:40:18,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 70.6470588235294) internal successors, (2402), 34 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:18,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:18,908 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:18,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 11:40:19,114 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,SelfDestructingSolverStorable26 [2023-01-28 11:40:19,114 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:19,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:19,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2010324311, now seen corresponding path program 21 times [2023-01-28 11:40:19,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:19,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448834799] [2023-01-28 11:40:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:19,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:20,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:20,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448834799] [2023-01-28 11:40:20,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448834799] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:20,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30311592] [2023-01-28 11:40:20,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:40:20,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:20,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:20,069 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 11:40:20,078 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 11:40:20,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:40:20,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:20,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 11:40:20,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:20,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:40:20,409 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 30 treesize of output 30 [2023-01-28 11:40:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:40:20,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:20,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:20,818 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 139 treesize of output 124 [2023-01-28 11:40:20,831 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:20,832 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 79 treesize of output 66 [2023-01-28 11:40:20,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:20,840 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 66 treesize of output 53 [2023-01-28 11:40:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:40:21,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30311592] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:21,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:21,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 30 [2023-01-28 11:40:21,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302537755] [2023-01-28 11:40:21,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:21,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 11:40:21,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:21,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 11:40:21,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=904, Unknown=1, NotChecked=0, Total=992 [2023-01-28 11:40:21,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-01-28 11:40:21,076 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 726 transitions, 17189 flow. Second operand has 32 states, 32 states have (on average 70.6875) internal successors, (2262), 32 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:21,076 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:21,076 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-01-28 11:40:21,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:23,622 INFO L130 PetriNetUnfolder]: 2385/4940 cut-off events. [2023-01-28 11:40:23,622 INFO L131 PetriNetUnfolder]: For 98978/98978 co-relation queries the response was YES. [2023-01-28 11:40:23,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45765 conditions, 4940 events. 2385/4940 cut-off events. For 98978/98978 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 36565 event pairs, 254 based on Foata normal form. 5/4934 useless extension candidates. Maximal degree in co-relation 45647. Up to 4202 conditions per place. [2023-01-28 11:40:23,677 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 606 selfloop transitions, 134 changer transitions 46/787 dead transitions. [2023-01-28 11:40:23,677 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 787 transitions, 19180 flow [2023-01-28 11:40:23,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 11:40:23,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 11:40:23,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1909 transitions. [2023-01-28 11:40:23,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2948717948717949 [2023-01-28 11:40:23,679 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1909 transitions. [2023-01-28 11:40:23,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1909 transitions. [2023-01-28 11:40:23,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:23,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1909 transitions. [2023-01-28 11:40:23,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 73.42307692307692) internal successors, (1909), 26 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:23,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:23,684 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 249.0) internal successors, (6723), 27 states have internal predecessors, (6723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:23,684 INFO L175 Difference]: Start difference. First operand has 356 places, 726 transitions, 17189 flow. Second operand 26 states and 1909 transitions. [2023-01-28 11:40:23,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 787 transitions, 19180 flow [2023-01-28 11:40:24,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 787 transitions, 18888 flow, removed 80 selfloop flow, removed 20 redundant places. [2023-01-28 11:40:24,498 INFO L231 Difference]: Finished difference. Result has 355 places, 701 transitions, 16644 flow [2023-01-28 11:40:24,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=16844, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=16644, PETRI_PLACES=355, PETRI_TRANSITIONS=701} [2023-01-28 11:40:24,500 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 334 predicate places. [2023-01-28 11:40:24,501 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 701 transitions, 16644 flow [2023-01-28 11:40:24,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 70.6875) internal successors, (2262), 32 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:24,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:24,501 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:24,507 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 11:40:24,707 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,SelfDestructingSolverStorable27 [2023-01-28 11:40:24,707 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:24,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:24,707 INFO L85 PathProgramCache]: Analyzing trace with hash 2107487572, now seen corresponding path program 22 times [2023-01-28 11:40:24,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:24,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553521807] [2023-01-28 11:40:24,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:24,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:26,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:26,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:26,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553521807] [2023-01-28 11:40:26,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553521807] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:26,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762020660] [2023-01-28 11:40:26,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:40:26,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:26,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:26,318 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 11:40:26,320 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 11:40:26,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:40:26,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:26,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2023-01-28 11:40:26,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:26,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:40:26,681 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 30 treesize of output 30 [2023-01-28 11:40:26,878 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-01-28 11:40:26,879 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 46 treesize of output 38 [2023-01-28 11:40:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:40:26,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:27,424 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-01-28 11:40:27,424 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 139 treesize of output 114 [2023-01-28 11:40:27,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:27,437 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 79 treesize of output 66 [2023-01-28 11:40:27,445 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:27,445 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 66 treesize of output 53 [2023-01-28 11:40:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:40:27,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762020660] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:27,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:27,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 33 [2023-01-28 11:40:27,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297217808] [2023-01-28 11:40:27,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:27,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 11:40:27,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:27,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 11:40:27,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1007, Unknown=3, NotChecked=0, Total=1190 [2023-01-28 11:40:27,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-01-28 11:40:27,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 701 transitions, 16644 flow. Second operand has 35 states, 35 states have (on average 70.57142857142857) internal successors, (2470), 35 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:27,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:27,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-01-28 11:40:27,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:29,052 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse15 (* c_~q_front~0 4))) (let ((.cse9 (+ .cse15 c_~q~0.offset 4)) (.cse4 (+ c_~N~0 1)) (.cse8 (select |c_#memory_int| c_~q~0.base)) (.cse11 (+ .cse15 c_~q~0.offset))) (let ((.cse1 (< c_~q_back~0 (+ c_~q_front~0 3))) (.cse5 (select .cse8 .cse11)) (.cse2 (< c_~q_back~0 1)) (.cse0 (and (forall ((v_ArrVal_1030 (Array Int Int))) (<= c_~N~0 (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse13 .cse9) (select .cse13 .cse11))))) (forall ((v_ArrVal_1030 (Array Int Int))) (< (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse14 .cse9) (select .cse14 .cse11))) .cse4)))) (.cse6 (< c_~q_back~0 (+ c_~q_front~0 2)))) (and (or .cse0 .cse1 .cse2) (or (let ((.cse3 (+ c_~s~0 .cse5))) (and (<= c_~N~0 .cse3) (< .cse3 .cse4))) .cse6 .cse2) (or .cse1 (let ((.cse7 (+ c_~s~0 .cse5 (select .cse8 .cse9)))) (and (< .cse7 .cse4) (<= c_~N~0 .cse7))) .cse2) (or .cse0 .cse6 (< c_~q_back~0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0)) (or (< c_~q_back~0 (+ c_~q_front~0 1)) (not (= (select .cse8 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (and (forall ((v_ArrVal_1030 (Array Int Int))) (< (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse10 .cse9) (select .cse10 .cse11))) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|))) (forall ((v_ArrVal_1030 (Array Int Int))) (< |c_thread1Thread1of1ForFork1_~i~0#1| (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse12 .cse9) (select .cse12 .cse11)))))) (< (+ c_~q_back~0 1) 0)))))) is different from false [2023-01-28 11:40:29,453 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_~s~0 2)) (.cse1 (+ c_~q_front~0 1))) (and (<= c_~N~0 c_~s~0) (<= c_~N~0 2) (or (and .cse0 (<= c_~q_back~0 .cse1)) (<= c_~q_back~0 c_~q_front~0)) .cse0 (<= c_~s~0 c_~N~0) (< 1 c_~N~0) (or (< c_~q_back~0 .cse1) (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse3 (+ .cse6 c_~q~0.offset 4)) (.cse4 (+ .cse6 c_~q~0.offset))) (and (forall ((v_ArrVal_1030 (Array Int Int))) (< (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse2 .cse3) (select .cse2 .cse4))) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|))) (forall ((v_ArrVal_1030 (Array Int Int))) (< |c_thread1Thread1of1ForFork1_~i~0#1| (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse5 .cse3) (select .cse5 .cse4)))))))) (< (+ c_~q_back~0 1) 0)) (= c_~q~0.offset 0))) is different from false [2023-01-28 11:40:29,472 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q_front~0 1))) (and (<= c_~N~0 2) (or (and (= c_~s~0 2) (<= c_~q_back~0 .cse0)) (<= c_~q_back~0 c_~q_front~0)) (< 1 c_~N~0) (or (< c_~q_back~0 .cse0) (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (let ((.cse5 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse5 c_~q~0.offset 4)) (.cse3 (+ .cse5 c_~q~0.offset))) (and (forall ((v_ArrVal_1030 (Array Int Int))) (< (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse1 .cse2) (select .cse1 .cse3))) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|))) (forall ((v_ArrVal_1030 (Array Int Int))) (< |c_thread1Thread1of1ForFork1_~i~0#1| (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse4 .cse2) (select .cse4 .cse3)))))))) (< (+ c_~q_back~0 1) 0)))) is different from false [2023-01-28 11:40:29,769 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse15 (* c_~q_front~0 4))) (let ((.cse9 (+ .cse15 c_~q~0.offset 4)) (.cse4 (+ c_~N~0 1)) (.cse8 (select |c_#memory_int| c_~q~0.base)) (.cse11 (+ .cse15 c_~q~0.offset))) (let ((.cse1 (< c_~q_back~0 (+ c_~q_front~0 3))) (.cse5 (select .cse8 .cse11)) (.cse2 (< c_~q_back~0 1)) (.cse0 (and (forall ((v_ArrVal_1030 (Array Int Int))) (<= c_~N~0 (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse13 .cse9) (select .cse13 .cse11))))) (forall ((v_ArrVal_1030 (Array Int Int))) (< (let ((.cse14 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse14 .cse9) (select .cse14 .cse11))) .cse4)))) (.cse6 (< c_~q_back~0 (+ c_~q_front~0 2)))) (and (or .cse0 .cse1 .cse2) (or (let ((.cse3 (+ c_~s~0 .cse5))) (and (<= c_~N~0 .cse3) (< .cse3 .cse4))) .cse6 .cse2) (or .cse1 (let ((.cse7 (+ c_~s~0 .cse5 (select .cse8 .cse9)))) (and (< .cse7 .cse4) (<= c_~N~0 .cse7))) .cse2) (or .cse0 .cse6 (< c_~q_back~0 0) (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0)) (or (and (<= c_~N~0 c_~s~0) (< c_~s~0 .cse4)) (< c_~q_front~0 0) (<= c_~q_back~0 c_~q_front~0)) (or (< c_~q_back~0 (+ c_~q_front~0 1)) (not (= (select .cse8 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (and (forall ((v_ArrVal_1030 (Array Int Int))) (< (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse10 .cse9) (select .cse10 .cse11))) (+ 2 |c_thread1Thread1of1ForFork1_~i~0#1|))) (forall ((v_ArrVal_1030 (Array Int Int))) (< |c_thread1Thread1of1ForFork1_~i~0#1| (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1030) c_~q~0.base))) (+ c_~s~0 (select .cse12 .cse9) (select .cse12 .cse11)))))) (< (+ c_~q_back~0 1) 0)))))) is different from false [2023-01-28 11:40:30,965 INFO L130 PetriNetUnfolder]: 2373/4919 cut-off events. [2023-01-28 11:40:30,966 INFO L131 PetriNetUnfolder]: For 97946/97946 co-relation queries the response was YES. [2023-01-28 11:40:31,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45533 conditions, 4919 events. 2373/4919 cut-off events. For 97946/97946 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 36091 event pairs, 245 based on Foata normal form. 4/4912 useless extension candidates. Maximal degree in co-relation 45413. Up to 4153 conditions per place. [2023-01-28 11:40:31,025 INFO L137 encePairwiseOnDemand]: 236/249 looper letters, 621 selfloop transitions, 196 changer transitions 25/843 dead transitions. [2023-01-28 11:40:31,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 843 transitions, 19835 flow [2023-01-28 11:40:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 11:40:31,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 11:40:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2793 transitions. [2023-01-28 11:40:31,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29518072289156627 [2023-01-28 11:40:31,028 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2793 transitions. [2023-01-28 11:40:31,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2793 transitions. [2023-01-28 11:40:31,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:31,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2793 transitions. [2023-01-28 11:40:31,031 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 73.5) internal successors, (2793), 38 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:31,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 249.0) internal successors, (9711), 39 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:31,037 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 249.0) internal successors, (9711), 39 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:31,037 INFO L175 Difference]: Start difference. First operand has 355 places, 701 transitions, 16644 flow. Second operand 38 states and 2793 transitions. [2023-01-28 11:40:31,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 843 transitions, 19835 flow [2023-01-28 11:40:31,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 843 transitions, 19435 flow, removed 58 selfloop flow, removed 25 redundant places. [2023-01-28 11:40:31,693 INFO L231 Difference]: Finished difference. Result has 363 places, 753 transitions, 17655 flow [2023-01-28 11:40:31,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=16280, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=17655, PETRI_PLACES=363, PETRI_TRANSITIONS=753} [2023-01-28 11:40:31,694 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 342 predicate places. [2023-01-28 11:40:31,695 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 753 transitions, 17655 flow [2023-01-28 11:40:31,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 70.57142857142857) internal successors, (2470), 35 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:31,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:31,695 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:31,700 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 11:40:31,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 11:40:31,897 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:31,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:31,897 INFO L85 PathProgramCache]: Analyzing trace with hash -383846094, now seen corresponding path program 23 times [2023-01-28 11:40:31,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:31,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812068170] [2023-01-28 11:40:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:33,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:33,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812068170] [2023-01-28 11:40:33,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812068170] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:33,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539215218] [2023-01-28 11:40:33,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:40:33,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:33,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:33,547 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 11:40:33,549 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 11:40:33,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:40:33,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:33,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2023-01-28 11:40:33,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:33,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:40:33,973 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 30 treesize of output 30 [2023-01-28 11:40:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:40:34,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:34,374 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse6 c_~q~0.offset 4)) (.cse3 (+ .cse6 c_~q~0.offset))) (and (forall ((v_ArrVal_1073 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1073) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (= .cse0 0) (< (+ c_~s~0 (select .cse1 .cse2) .cse0) (+ c_~N~0 1)))))) (forall ((v_ArrVal_1073 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1073) c_~q~0.base))) (let ((.cse5 (select .cse4 .cse3))) (or (<= c_~N~0 (+ c_~s~0 (select .cse4 .cse2) .cse5)) (= .cse5 0)))))))) is different from false [2023-01-28 11:40:34,612 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:34,613 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 197 treesize of output 166 [2023-01-28 11:40:34,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:34,625 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 121 treesize of output 102 [2023-01-28 11:40:34,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:34,633 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 102 treesize of output 83 [2023-01-28 11:40:34,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:40:34,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539215218] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:34,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:34,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 34 [2023-01-28 11:40:34,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621712421] [2023-01-28 11:40:34,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:34,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 11:40:34,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:34,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 11:40:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1087, Unknown=1, NotChecked=66, Total=1260 [2023-01-28 11:40:34,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 249 [2023-01-28 11:40:34,872 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 753 transitions, 17655 flow. Second operand has 36 states, 36 states have (on average 70.58333333333333) internal successors, (2541), 36 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:34,872 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:34,872 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 249 [2023-01-28 11:40:34,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:36,240 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse8 (* c_~q_front~0 4))) (let ((.cse3 (+ .cse8 c_~q~0.offset 4)) (.cse5 (+ .cse8 c_~q~0.offset))) (let ((.cse0 (forall ((v_ArrVal_1073 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1073) c_~q~0.base))) (let ((.cse6 (select .cse7 .cse5))) (or (= .cse6 0) (< (+ c_~s~0 (select .cse7 .cse3) .cse6) (+ c_~N~0 1))))))) (.cse1 (forall ((v_ArrVal_1073 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1073) c_~q~0.base))) (let ((.cse4 (select .cse2 .cse5))) (or (<= c_~N~0 (+ c_~s~0 (select .cse2 .cse3) .cse4)) (= .cse4 0))))))) (and (or (< |c_thread1Thread1of1ForFork1_~i~0#1| c_~N~0) (and .cse0 .cse1)) .cse0 .cse1)))) is different from false [2023-01-28 11:40:37,681 INFO L130 PetriNetUnfolder]: 2360/4890 cut-off events. [2023-01-28 11:40:37,682 INFO L131 PetriNetUnfolder]: For 115113/115113 co-relation queries the response was YES. [2023-01-28 11:40:37,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50502 conditions, 4890 events. 2360/4890 cut-off events. For 115113/115113 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 36096 event pairs, 250 based on Foata normal form. 1/4880 useless extension candidates. Maximal degree in co-relation 50380. Up to 4302 conditions per place. [2023-01-28 11:40:37,744 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 643 selfloop transitions, 162 changer transitions 11/817 dead transitions. [2023-01-28 11:40:37,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 817 transitions, 20083 flow [2023-01-28 11:40:37,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 11:40:37,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 11:40:37,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1976 transitions. [2023-01-28 11:40:37,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2939164063662056 [2023-01-28 11:40:37,746 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1976 transitions. [2023-01-28 11:40:37,747 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1976 transitions. [2023-01-28 11:40:37,747 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:37,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1976 transitions. [2023-01-28 11:40:37,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 73.18518518518519) internal successors, (1976), 27 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:37,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 249.0) internal successors, (6972), 28 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:37,753 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 249.0) internal successors, (6972), 28 states have internal predecessors, (6972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:37,753 INFO L175 Difference]: Start difference. First operand has 363 places, 753 transitions, 17655 flow. Second operand 27 states and 1976 transitions. [2023-01-28 11:40:37,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 817 transitions, 20083 flow [2023-01-28 11:40:38,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 817 transitions, 19698 flow, removed 153 selfloop flow, removed 14 redundant places. [2023-01-28 11:40:38,485 INFO L231 Difference]: Finished difference. Result has 373 places, 758 transitions, 17836 flow [2023-01-28 11:40:38,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=17269, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=17836, PETRI_PLACES=373, PETRI_TRANSITIONS=758} [2023-01-28 11:40:38,486 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 352 predicate places. [2023-01-28 11:40:38,486 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 758 transitions, 17836 flow [2023-01-28 11:40:38,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 70.58333333333333) internal successors, (2541), 36 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:38,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:38,486 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:38,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-01-28 11:40:38,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:38,693 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:38,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:38,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1106893791, now seen corresponding path program 24 times [2023-01-28 11:40:38,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:38,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956254374] [2023-01-28 11:40:38,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:40:38,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:38,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956254374] [2023-01-28 11:40:38,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956254374] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:38,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122168448] [2023-01-28 11:40:38,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:40:38,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:38,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:38,823 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 11:40:38,824 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 11:40:38,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 11:40:38,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 11:40:38,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:40:39,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:39,317 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:40:39,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122168448] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:39,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:39,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 29 [2023-01-28 11:40:39,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511226974] [2023-01-28 11:40:39,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:39,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 11:40:39,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:39,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 11:40:39,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=646, Unknown=0, NotChecked=0, Total=870 [2023-01-28 11:40:39,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 249 [2023-01-28 11:40:39,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 758 transitions, 17836 flow. Second operand has 30 states, 30 states have (on average 95.8) internal successors, (2874), 30 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:39,322 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:39,322 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 249 [2023-01-28 11:40:39,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:40,482 INFO L130 PetriNetUnfolder]: 934/1952 cut-off events. [2023-01-28 11:40:40,482 INFO L131 PetriNetUnfolder]: For 48020/48025 co-relation queries the response was YES. [2023-01-28 11:40:40,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20162 conditions, 1952 events. 934/1952 cut-off events. For 48020/48025 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 12729 event pairs, 125 based on Foata normal form. 104/2048 useless extension candidates. Maximal degree in co-relation 20039. Up to 1114 conditions per place. [2023-01-28 11:40:40,505 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 345 selfloop transitions, 76 changer transitions 82/510 dead transitions. [2023-01-28 11:40:40,505 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 510 transitions, 11639 flow [2023-01-28 11:40:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 11:40:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 11:40:40,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2752 transitions. [2023-01-28 11:40:40,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3947217441193345 [2023-01-28 11:40:40,507 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2752 transitions. [2023-01-28 11:40:40,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2752 transitions. [2023-01-28 11:40:40,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:40,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2752 transitions. [2023-01-28 11:40:40,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:40,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 249.0) internal successors, (7221), 29 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:40,515 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 249.0) internal successors, (7221), 29 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:40,515 INFO L175 Difference]: Start difference. First operand has 373 places, 758 transitions, 17836 flow. Second operand 28 states and 2752 transitions. [2023-01-28 11:40:40,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 510 transitions, 11639 flow [2023-01-28 11:40:40,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 510 transitions, 10276 flow, removed 162 selfloop flow, removed 83 redundant places. [2023-01-28 11:40:40,788 INFO L231 Difference]: Finished difference. Result has 280 places, 352 transitions, 7418 flow [2023-01-28 11:40:40,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=7039, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7418, PETRI_PLACES=280, PETRI_TRANSITIONS=352} [2023-01-28 11:40:40,788 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 259 predicate places. [2023-01-28 11:40:40,788 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 352 transitions, 7418 flow [2023-01-28 11:40:40,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 95.8) internal successors, (2874), 30 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:40,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:40,789 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:40,794 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 11:40:40,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:40,990 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:40,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:40,990 INFO L85 PathProgramCache]: Analyzing trace with hash 40937036, now seen corresponding path program 25 times [2023-01-28 11:40:40,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:40,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723326393] [2023-01-28 11:40:40,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:40,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:41,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:41,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723326393] [2023-01-28 11:40:41,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723326393] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:41,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195841194] [2023-01-28 11:40:41,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:40:41,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:41,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:41,433 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 11:40:41,434 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 11:40:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:41,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 11:40:41,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:41,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:42,022 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:40:42,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 11:40:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:42,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195841194] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:42,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:42,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 39 [2023-01-28 11:40:42,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35398303] [2023-01-28 11:40:42,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:42,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 11:40:42,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:42,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 11:40:42,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1324, Unknown=0, NotChecked=0, Total=1560 [2023-01-28 11:40:42,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 249 [2023-01-28 11:40:42,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 352 transitions, 7418 flow. Second operand has 40 states, 40 states have (on average 76.55) internal successors, (3062), 40 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:42,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:42,396 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 249 [2023-01-28 11:40:42,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:46,218 INFO L130 PetriNetUnfolder]: 1316/2632 cut-off events. [2023-01-28 11:40:46,218 INFO L131 PetriNetUnfolder]: For 55084/55085 co-relation queries the response was YES. [2023-01-28 11:40:46,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24205 conditions, 2632 events. 1316/2632 cut-off events. For 55084/55085 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 17670 event pairs, 20 based on Foata normal form. 43/2666 useless extension candidates. Maximal degree in co-relation 24108. Up to 1057 conditions per place. [2023-01-28 11:40:46,244 INFO L137 encePairwiseOnDemand]: 239/249 looper letters, 253 selfloop transitions, 451 changer transitions 1/706 dead transitions. [2023-01-28 11:40:46,244 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 706 transitions, 13466 flow [2023-01-28 11:40:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-01-28 11:40:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-01-28 11:40:46,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4666 transitions. [2023-01-28 11:40:46,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32308544522919264 [2023-01-28 11:40:46,247 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4666 transitions. [2023-01-28 11:40:46,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4666 transitions. [2023-01-28 11:40:46,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:46,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4666 transitions. [2023-01-28 11:40:46,251 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 80.44827586206897) internal successors, (4666), 58 states have internal predecessors, (4666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:46,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 249.0) internal successors, (14691), 59 states have internal predecessors, (14691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:46,258 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 249.0) internal successors, (14691), 59 states have internal predecessors, (14691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:46,258 INFO L175 Difference]: Start difference. First operand has 280 places, 352 transitions, 7418 flow. Second operand 58 states and 4666 transitions. [2023-01-28 11:40:46,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 706 transitions, 13466 flow [2023-01-28 11:40:46,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 706 transitions, 12512 flow, removed 222 selfloop flow, removed 24 redundant places. [2023-01-28 11:40:46,577 INFO L231 Difference]: Finished difference. Result has 265 places, 525 transitions, 10924 flow [2023-01-28 11:40:46,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=6843, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=308, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=10924, PETRI_PLACES=265, PETRI_TRANSITIONS=525} [2023-01-28 11:40:46,578 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-01-28 11:40:46,579 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 525 transitions, 10924 flow [2023-01-28 11:40:46,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 76.55) internal successors, (3062), 40 states have internal predecessors, (3062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:46,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:46,579 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:46,585 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 11:40:46,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:46,785 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:46,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:46,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1485215956, now seen corresponding path program 26 times [2023-01-28 11:40:46,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:46,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019917933] [2023-01-28 11:40:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:46,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:47,283 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:47,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:47,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019917933] [2023-01-28 11:40:47,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019917933] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:47,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964380163] [2023-01-28 11:40:47,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:40:47,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:47,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:47,285 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 11:40:47,286 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 11:40:47,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:40:47,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:47,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 46 conjunts are in the unsatisfiable core [2023-01-28 11:40:47,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:47,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:40:47,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 11:40:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:47,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:48,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:40:48,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 40 [2023-01-28 11:40:48,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2023-01-28 11:40:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:48,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964380163] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:48,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:48,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 39 [2023-01-28 11:40:48,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398096667] [2023-01-28 11:40:48,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:48,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 11:40:48,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 11:40:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1340, Unknown=0, NotChecked=0, Total=1560 [2023-01-28 11:40:48,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 249 [2023-01-28 11:40:48,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 525 transitions, 10924 flow. Second operand has 40 states, 40 states have (on average 81.375) internal successors, (3255), 40 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:48,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:48,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 249 [2023-01-28 11:40:48,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:51,207 INFO L130 PetriNetUnfolder]: 1746/3470 cut-off events. [2023-01-28 11:40:51,207 INFO L131 PetriNetUnfolder]: For 64758/64768 co-relation queries the response was YES. [2023-01-28 11:40:51,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32753 conditions, 3470 events. 1746/3470 cut-off events. For 64758/64768 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23895 event pairs, 155 based on Foata normal form. 49/3507 useless extension candidates. Maximal degree in co-relation 32657. Up to 1529 conditions per place. [2023-01-28 11:40:51,245 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 377 selfloop transitions, 434 changer transitions 0/819 dead transitions. [2023-01-28 11:40:51,245 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 819 transitions, 17017 flow [2023-01-28 11:40:51,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 11:40:51,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 11:40:51,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3179 transitions. [2023-01-28 11:40:51,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34505589927276675 [2023-01-28 11:40:51,247 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3179 transitions. [2023-01-28 11:40:51,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3179 transitions. [2023-01-28 11:40:51,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:51,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3179 transitions. [2023-01-28 11:40:51,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 85.91891891891892) internal successors, (3179), 37 states have internal predecessors, (3179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:51,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:51,254 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 249.0) internal successors, (9462), 38 states have internal predecessors, (9462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:51,254 INFO L175 Difference]: Start difference. First operand has 265 places, 525 transitions, 10924 flow. Second operand 37 states and 3179 transitions. [2023-01-28 11:40:51,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 819 transitions, 17017 flow [2023-01-28 11:40:51,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 819 transitions, 15237 flow, removed 820 selfloop flow, removed 15 redundant places. [2023-01-28 11:40:51,679 INFO L231 Difference]: Finished difference. Result has 299 places, 680 transitions, 14206 flow [2023-01-28 11:40:51,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=9725, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=14206, PETRI_PLACES=299, PETRI_TRANSITIONS=680} [2023-01-28 11:40:51,679 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 278 predicate places. [2023-01-28 11:40:51,680 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 680 transitions, 14206 flow [2023-01-28 11:40:51,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 81.375) internal successors, (3255), 40 states have internal predecessors, (3255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:51,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:51,680 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:51,685 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 11:40:51,880 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,SelfDestructingSolverStorable32 [2023-01-28 11:40:51,881 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:51,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash -140449133, now seen corresponding path program 27 times [2023-01-28 11:40:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:51,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54540424] [2023-01-28 11:40:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:51,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:40:51,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:51,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54540424] [2023-01-28 11:40:51,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54540424] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:51,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882337412] [2023-01-28 11:40:51,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:40:51,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:51,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:51,981 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 11:40:51,991 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 11:40:52,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:40:52,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:52,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 11:40:52,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:40:52,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:40:52,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882337412] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:52,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:52,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 8] total 12 [2023-01-28 11:40:52,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300767051] [2023-01-28 11:40:52,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:52,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 11:40:52,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:52,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 11:40:52,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2023-01-28 11:40:52,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 249 [2023-01-28 11:40:52,407 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 680 transitions, 14206 flow. Second operand has 13 states, 13 states have (on average 110.61538461538461) internal successors, (1438), 13 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:52,407 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:52,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 249 [2023-01-28 11:40:52,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:53,359 INFO L130 PetriNetUnfolder]: 1888/3780 cut-off events. [2023-01-28 11:40:53,360 INFO L131 PetriNetUnfolder]: For 67828/67838 co-relation queries the response was YES. [2023-01-28 11:40:53,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34328 conditions, 3780 events. 1888/3780 cut-off events. For 67828/67838 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 26642 event pairs, 182 based on Foata normal form. 73/3798 useless extension candidates. Maximal degree in co-relation 34223. Up to 1734 conditions per place. [2023-01-28 11:40:53,401 INFO L137 encePairwiseOnDemand]: 244/249 looper letters, 303 selfloop transitions, 387 changer transitions 55/753 dead transitions. [2023-01-28 11:40:53,401 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 753 transitions, 16892 flow [2023-01-28 11:40:53,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:40:53,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:40:53,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 707 transitions. [2023-01-28 11:40:53,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47322623828647925 [2023-01-28 11:40:53,402 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 707 transitions. [2023-01-28 11:40:53,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 707 transitions. [2023-01-28 11:40:53,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:53,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 707 transitions. [2023-01-28 11:40:53,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.83333333333333) internal successors, (707), 6 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:53,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:53,404 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 249.0) internal successors, (1743), 7 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:53,404 INFO L175 Difference]: Start difference. First operand has 299 places, 680 transitions, 14206 flow. Second operand 6 states and 707 transitions. [2023-01-28 11:40:53,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 753 transitions, 16892 flow [2023-01-28 11:40:53,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 753 transitions, 16062 flow, removed 245 selfloop flow, removed 16 redundant places. [2023-01-28 11:40:53,920 INFO L231 Difference]: Finished difference. Result has 290 places, 674 transitions, 14975 flow [2023-01-28 11:40:53,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=13441, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=344, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14975, PETRI_PLACES=290, PETRI_TRANSITIONS=674} [2023-01-28 11:40:53,921 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 269 predicate places. [2023-01-28 11:40:53,921 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 674 transitions, 14975 flow [2023-01-28 11:40:53,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 110.61538461538461) internal successors, (1438), 13 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:53,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:53,922 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:53,928 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 11:40:54,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:54,128 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:54,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:54,128 INFO L85 PathProgramCache]: Analyzing trace with hash -632389972, now seen corresponding path program 28 times [2023-01-28 11:40:54,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:54,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906663360] [2023-01-28 11:40:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:54,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:54,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:54,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:54,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906663360] [2023-01-28 11:40:54,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906663360] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:54,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701758821] [2023-01-28 11:40:54,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:40:54,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:54,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:54,561 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 11:40:54,562 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 11:40:54,695 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:40:54,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:40:54,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 11:40:54,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:40:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:55,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:40:55,091 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:40:55,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-01-28 11:40:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:55,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701758821] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:40:55,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:40:55,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-01-28 11:40:55,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078760092] [2023-01-28 11:40:55,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:40:55,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 11:40:55,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:40:55,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 11:40:55,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2023-01-28 11:40:55,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 249 [2023-01-28 11:40:55,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 674 transitions, 14975 flow. Second operand has 38 states, 38 states have (on average 85.55263157894737) internal successors, (3251), 38 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:55,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:40:55,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 249 [2023-01-28 11:40:55,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:40:58,763 INFO L130 PetriNetUnfolder]: 1913/3922 cut-off events. [2023-01-28 11:40:58,763 INFO L131 PetriNetUnfolder]: For 66217/66228 co-relation queries the response was YES. [2023-01-28 11:40:58,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35356 conditions, 3922 events. 1913/3922 cut-off events. For 66217/66228 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28145 event pairs, 157 based on Foata normal form. 42/3916 useless extension candidates. Maximal degree in co-relation 35249. Up to 1569 conditions per place. [2023-01-28 11:40:58,803 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 456 selfloop transitions, 453 changer transitions 2/919 dead transitions. [2023-01-28 11:40:58,803 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 919 transitions, 19669 flow [2023-01-28 11:40:58,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-01-28 11:40:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-01-28 11:40:58,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4202 transitions. [2023-01-28 11:40:58,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35905323421344953 [2023-01-28 11:40:58,808 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4202 transitions. [2023-01-28 11:40:58,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4202 transitions. [2023-01-28 11:40:58,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:40:58,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4202 transitions. [2023-01-28 11:40:58,812 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 89.40425531914893) internal successors, (4202), 47 states have internal predecessors, (4202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:58,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 249.0) internal successors, (11952), 48 states have internal predecessors, (11952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:58,819 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 249.0) internal successors, (11952), 48 states have internal predecessors, (11952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:58,819 INFO L175 Difference]: Start difference. First operand has 290 places, 674 transitions, 14975 flow. Second operand 47 states and 4202 transitions. [2023-01-28 11:40:58,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 919 transitions, 19669 flow [2023-01-28 11:40:59,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 919 transitions, 19141 flow, removed 221 selfloop flow, removed 4 redundant places. [2023-01-28 11:40:59,370 INFO L231 Difference]: Finished difference. Result has 326 places, 743 transitions, 17290 flow [2023-01-28 11:40:59,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=14660, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=17290, PETRI_PLACES=326, PETRI_TRANSITIONS=743} [2023-01-28 11:40:59,371 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 305 predicate places. [2023-01-28 11:40:59,371 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 743 transitions, 17290 flow [2023-01-28 11:40:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 85.55263157894737) internal successors, (3251), 38 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:40:59,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:40:59,372 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:40:59,380 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 11:40:59,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:59,578 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:40:59,578 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:40:59,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1374271088, now seen corresponding path program 29 times [2023-01-28 11:40:59,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:40:59,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232416343] [2023-01-28 11:40:59,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:40:59,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:40:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:40:59,952 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:40:59,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:40:59,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232416343] [2023-01-28 11:40:59,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232416343] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:40:59,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734307291] [2023-01-28 11:40:59,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:40:59,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:40:59,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:40:59,954 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 11:40:59,956 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 11:41:00,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 11:41:00,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:00,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 11:41:00,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:00,352 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 11:41:00,353 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 11 [2023-01-28 11:41:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:00,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:00,430 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:41:00,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 12 [2023-01-28 11:41:00,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:00,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734307291] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:00,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:00,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-01-28 11:41:00,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98844149] [2023-01-28 11:41:00,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:00,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 11:41:00,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:00,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 11:41:00,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=1122, Unknown=0, NotChecked=0, Total=1406 [2023-01-28 11:41:00,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 249 [2023-01-28 11:41:00,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 743 transitions, 17290 flow. Second operand has 38 states, 38 states have (on average 85.44736842105263) internal successors, (3247), 38 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:00,787 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:00,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 249 [2023-01-28 11:41:00,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:03,708 INFO L130 PetriNetUnfolder]: 1665/3424 cut-off events. [2023-01-28 11:41:03,709 INFO L131 PetriNetUnfolder]: For 60062/60073 co-relation queries the response was YES. [2023-01-28 11:41:03,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31637 conditions, 3424 events. 1665/3424 cut-off events. For 60062/60073 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 23855 event pairs, 133 based on Foata normal form. 78/3462 useless extension candidates. Maximal degree in co-relation 31527. Up to 1569 conditions per place. [2023-01-28 11:41:03,750 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 378 selfloop transitions, 398 changer transitions 27/811 dead transitions. [2023-01-28 11:41:03,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 811 transitions, 18349 flow [2023-01-28 11:41:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 11:41:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 11:41:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3675 transitions. [2023-01-28 11:41:03,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35997649133117837 [2023-01-28 11:41:03,753 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3675 transitions. [2023-01-28 11:41:03,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3675 transitions. [2023-01-28 11:41:03,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:03,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3675 transitions. [2023-01-28 11:41:03,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 89.63414634146342) internal successors, (3675), 41 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:03,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 249.0) internal successors, (10458), 42 states have internal predecessors, (10458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:03,760 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 249.0) internal successors, (10458), 42 states have internal predecessors, (10458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:03,760 INFO L175 Difference]: Start difference. First operand has 326 places, 743 transitions, 17290 flow. Second operand 41 states and 3675 transitions. [2023-01-28 11:41:03,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 811 transitions, 18349 flow [2023-01-28 11:41:04,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 811 transitions, 17695 flow, removed 183 selfloop flow, removed 22 redundant places. [2023-01-28 11:41:04,224 INFO L231 Difference]: Finished difference. Result has 341 places, 649 transitions, 15779 flow [2023-01-28 11:41:04,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=15410, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=15779, PETRI_PLACES=341, PETRI_TRANSITIONS=649} [2023-01-28 11:41:04,225 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 320 predicate places. [2023-01-28 11:41:04,225 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 649 transitions, 15779 flow [2023-01-28 11:41:04,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 85.44736842105263) internal successors, (3247), 38 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:04,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:04,225 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:04,230 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 11:41:04,425 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,SelfDestructingSolverStorable35 [2023-01-28 11:41:04,426 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:41:04,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:04,426 INFO L85 PathProgramCache]: Analyzing trace with hash -317908194, now seen corresponding path program 30 times [2023-01-28 11:41:04,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:04,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071809287] [2023-01-28 11:41:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:04,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:04,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:04,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:04,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071809287] [2023-01-28 11:41:04,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071809287] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:04,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278815224] [2023-01-28 11:41:04,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:41:04,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:04,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:04,854 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 11:41:04,855 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 11:41:05,031 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:41:05,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:05,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 11:41:05,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:05,307 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 11:41:05,308 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 11 [2023-01-28 11:41:05,330 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:05,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:05,409 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:41:05,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 11:41:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:05,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278815224] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:05,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:05,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-01-28 11:41:05,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873511954] [2023-01-28 11:41:05,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:05,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 11:41:05,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:05,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 11:41:05,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1135, Unknown=0, NotChecked=0, Total=1406 [2023-01-28 11:41:05,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 249 [2023-01-28 11:41:05,820 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 649 transitions, 15779 flow. Second operand has 38 states, 38 states have (on average 85.44736842105263) internal successors, (3247), 38 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:05,820 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:05,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 249 [2023-01-28 11:41:05,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:08,614 INFO L130 PetriNetUnfolder]: 1634/3362 cut-off events. [2023-01-28 11:41:08,614 INFO L131 PetriNetUnfolder]: For 57245/57256 co-relation queries the response was YES. [2023-01-28 11:41:08,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31195 conditions, 3362 events. 1634/3362 cut-off events. For 57245/57256 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23323 event pairs, 237 based on Foata normal form. 8/3332 useless extension candidates. Maximal degree in co-relation 31087. Up to 2532 conditions per place. [2023-01-28 11:41:08,645 INFO L137 encePairwiseOnDemand]: 242/249 looper letters, 623 selfloop transitions, 141 changer transitions 1/773 dead transitions. [2023-01-28 11:41:08,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 773 transitions, 17939 flow [2023-01-28 11:41:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 11:41:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 11:41:08,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3731 transitions. [2023-01-28 11:41:08,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.356760374832664 [2023-01-28 11:41:08,648 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3731 transitions. [2023-01-28 11:41:08,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3731 transitions. [2023-01-28 11:41:08,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:08,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3731 transitions. [2023-01-28 11:41:08,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 88.83333333333333) internal successors, (3731), 42 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:08,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 249.0) internal successors, (10707), 43 states have internal predecessors, (10707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:08,655 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 249.0) internal successors, (10707), 43 states have internal predecessors, (10707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:08,655 INFO L175 Difference]: Start difference. First operand has 341 places, 649 transitions, 15779 flow. Second operand 42 states and 3731 transitions. [2023-01-28 11:41:08,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 773 transitions, 17939 flow [2023-01-28 11:41:09,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 773 transitions, 17001 flow, removed 36 selfloop flow, removed 29 redundant places. [2023-01-28 11:41:09,027 INFO L231 Difference]: Finished difference. Result has 350 places, 657 transitions, 15270 flow [2023-01-28 11:41:09,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=14845, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=15270, PETRI_PLACES=350, PETRI_TRANSITIONS=657} [2023-01-28 11:41:09,027 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 329 predicate places. [2023-01-28 11:41:09,027 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 657 transitions, 15270 flow [2023-01-28 11:41:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 85.44736842105263) internal successors, (3247), 38 states have internal predecessors, (3247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:09,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:09,028 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:09,036 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 11:41:09,228 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,SelfDestructingSolverStorable36 [2023-01-28 11:41:09,229 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:41:09,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:09,229 INFO L85 PathProgramCache]: Analyzing trace with hash 490083100, now seen corresponding path program 31 times [2023-01-28 11:41:09,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:09,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834582873] [2023-01-28 11:41:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:09,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:09,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:09,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834582873] [2023-01-28 11:41:09,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834582873] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:09,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480850464] [2023-01-28 11:41:09,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:41:09,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:09,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:09,665 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 11:41:09,673 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 11:41:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:09,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 11:41:09,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:41:10,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:10,127 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:41:10,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 11:41:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 11:41:10,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480850464] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:10,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:10,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 31 [2023-01-28 11:41:10,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680240465] [2023-01-28 11:41:10,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:10,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 11:41:10,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:10,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 11:41:10,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2023-01-28 11:41:10,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 249 [2023-01-28 11:41:10,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 657 transitions, 15270 flow. Second operand has 32 states, 32 states have (on average 76.8125) internal successors, (2458), 32 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:10,266 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:10,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 249 [2023-01-28 11:41:10,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:13,128 INFO L130 PetriNetUnfolder]: 1587/3189 cut-off events. [2023-01-28 11:41:13,128 INFO L131 PetriNetUnfolder]: For 52975/52976 co-relation queries the response was YES. [2023-01-28 11:41:13,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29013 conditions, 3189 events. 1587/3189 cut-off events. For 52975/52976 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21764 event pairs, 132 based on Foata normal form. 63/3232 useless extension candidates. Maximal degree in co-relation 28907. Up to 1156 conditions per place. [2023-01-28 11:41:13,164 INFO L137 encePairwiseOnDemand]: 240/249 looper letters, 301 selfloop transitions, 503 changer transitions 0/805 dead transitions. [2023-01-28 11:41:13,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 805 transitions, 17903 flow [2023-01-28 11:41:13,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-01-28 11:41:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-01-28 11:41:13,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 4357 transitions. [2023-01-28 11:41:13,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31814530850675427 [2023-01-28 11:41:13,167 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 4357 transitions. [2023-01-28 11:41:13,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 4357 transitions. [2023-01-28 11:41:13,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:13,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 4357 transitions. [2023-01-28 11:41:13,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 79.21818181818182) internal successors, (4357), 55 states have internal predecessors, (4357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:13,176 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 249.0) internal successors, (13944), 56 states have internal predecessors, (13944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:13,177 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 249.0) internal successors, (13944), 56 states have internal predecessors, (13944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:13,177 INFO L175 Difference]: Start difference. First operand has 350 places, 657 transitions, 15270 flow. Second operand 55 states and 4357 transitions. [2023-01-28 11:41:13,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 805 transitions, 17903 flow [2023-01-28 11:41:13,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 805 transitions, 17632 flow, removed 41 selfloop flow, removed 25 redundant places. [2023-01-28 11:41:13,548 INFO L231 Difference]: Finished difference. Result has 384 places, 677 transitions, 16545 flow [2023-01-28 11:41:13,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=14536, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=464, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=16545, PETRI_PLACES=384, PETRI_TRANSITIONS=677} [2023-01-28 11:41:13,549 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 363 predicate places. [2023-01-28 11:41:13,549 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 677 transitions, 16545 flow [2023-01-28 11:41:13,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 76.8125) internal successors, (2458), 32 states have internal predecessors, (2458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:13,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:13,549 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:13,554 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 11:41:13,751 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,SelfDestructingSolverStorable37 [2023-01-28 11:41:13,751 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:41:13,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1682141343, now seen corresponding path program 32 times [2023-01-28 11:41:13,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:13,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062264860] [2023-01-28 11:41:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:13,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:14,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062264860] [2023-01-28 11:41:14,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062264860] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:14,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747125876] [2023-01-28 11:41:14,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:41:14,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:14,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:14,773 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 11:41:14,774 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 11:41:14,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:41:14,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:14,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 11:41:14,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:41:15,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:15,231 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:41:15,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2023-01-28 11:41:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 11:41:15,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747125876] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:15,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:15,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 7] total 27 [2023-01-28 11:41:15,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215042579] [2023-01-28 11:41:15,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:15,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 11:41:15,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:15,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 11:41:15,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2023-01-28 11:41:15,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 249 [2023-01-28 11:41:15,251 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 677 transitions, 16545 flow. Second operand has 28 states, 28 states have (on average 85.78571428571429) internal successors, (2402), 28 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:15,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:15,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 249 [2023-01-28 11:41:15,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:18,201 INFO L130 PetriNetUnfolder]: 1872/3686 cut-off events. [2023-01-28 11:41:18,201 INFO L131 PetriNetUnfolder]: For 66545/66555 co-relation queries the response was YES. [2023-01-28 11:41:18,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35042 conditions, 3686 events. 1872/3686 cut-off events. For 66545/66555 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 25623 event pairs, 168 based on Foata normal form. 53/3716 useless extension candidates. Maximal degree in co-relation 34933. Up to 1426 conditions per place. [2023-01-28 11:41:18,243 INFO L137 encePairwiseOnDemand]: 241/249 looper letters, 338 selfloop transitions, 566 changer transitions 0/912 dead transitions. [2023-01-28 11:41:18,243 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 912 transitions, 21623 flow [2023-01-28 11:41:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 11:41:18,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 11:41:18,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3387 transitions. [2023-01-28 11:41:18,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3579581483830057 [2023-01-28 11:41:18,245 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3387 transitions. [2023-01-28 11:41:18,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3387 transitions. [2023-01-28 11:41:18,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:18,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3387 transitions. [2023-01-28 11:41:18,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 89.13157894736842) internal successors, (3387), 38 states have internal predecessors, (3387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:18,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 249.0) internal successors, (9711), 39 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:18,251 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 249.0) internal successors, (9711), 39 states have internal predecessors, (9711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:18,251 INFO L175 Difference]: Start difference. First operand has 384 places, 677 transitions, 16545 flow. Second operand 38 states and 3387 transitions. [2023-01-28 11:41:18,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 912 transitions, 21623 flow [2023-01-28 11:41:18,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 912 transitions, 20620 flow, removed 119 selfloop flow, removed 29 redundant places. [2023-01-28 11:41:18,736 INFO L231 Difference]: Finished difference. Result has 395 places, 758 transitions, 18703 flow [2023-01-28 11:41:18,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=249, PETRI_DIFFERENCE_MINUEND_FLOW=15668, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=499, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=18703, PETRI_PLACES=395, PETRI_TRANSITIONS=758} [2023-01-28 11:41:18,737 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 374 predicate places. [2023-01-28 11:41:18,737 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 758 transitions, 18703 flow [2023-01-28 11:41:18,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 85.78571428571429) internal successors, (2402), 28 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:18,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:18,738 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:18,742 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 11:41:18,938 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,SelfDestructingSolverStorable38 [2023-01-28 11:41:18,938 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:41:18,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:18,939 INFO L85 PathProgramCache]: Analyzing trace with hash -22861095, now seen corresponding path program 33 times [2023-01-28 11:41:18,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:18,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318986742] [2023-01-28 11:41:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:18,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:20,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:20,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318986742] [2023-01-28 11:41:20,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318986742] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:20,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792308298] [2023-01-28 11:41:20,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:41:20,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:20,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:20,167 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 11:41:20,169 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 11:41:20,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:41:20,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:20,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 93 conjunts are in the unsatisfiable core [2023-01-28 11:41:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:20,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:41:20,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:41:20,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:41:20,937 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 11:41:21,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:41:21,238 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 42 treesize of output 40 [2023-01-28 11:41:21,713 INFO L321 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2023-01-28 11:41:21,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 70 treesize of output 50 [2023-01-28 11:41:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:21,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:26,176 INFO L321 Elim1Store]: treesize reduction 104, result has 49.3 percent of original size [2023-01-28 11:41:26,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 743 treesize of output 437 [2023-01-28 11:41:26,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 613 treesize of output 584 [2023-01-28 11:41:26,474 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:26,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1128 treesize of output 1235 [2023-01-28 11:41:26,822 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:26,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 722 treesize of output 794 [2023-01-28 11:41:26,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:26,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 673 treesize of output 638 [2023-01-28 11:41:27,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:27,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 613 treesize of output 685 [2023-01-28 11:41:27,202 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:27,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 564 treesize of output 529 [2023-01-28 11:41:27,658 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:41:27,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 539 treesize of output 706 [2023-01-28 11:49:15,216 WARN L222 SmtUtils]: Spent 7.98s on a formula simplification. DAG size of input: 464 DAG size of output: 556 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Received shutdown request... [2023-01-28 11:49:58,468 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 11:49:58,468 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 11:49:58,471 WARN L238 SmtUtils]: Removed 2 from assertion stack [2023-01-28 11:49:58,474 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 11:49:58,479 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 11:49:58,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 11:49:58,674 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 9ms.. [2023-01-28 11:49:58,676 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 11:49:58,676 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 11:49:58,676 INFO L445 BasicCegarLoop]: Path program histogram: [33, 4, 1, 1, 1] [2023-01-28 11:49:58,679 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 11:49:58,679 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 11:49:58,681 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 11:49:58 BasicIcfg [2023-01-28 11:49:58,682 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 11:49:58,682 INFO L158 Benchmark]: Toolchain (without parser) took 798206.39ms. Allocated memory was 417.3MB in the beginning and 1.8GB in the end (delta: 1.4GB). Free memory was 364.2MB in the beginning and 1.1GB in the end (delta: -737.1MB). Peak memory consumption was 1.2GB. Max. memory is 16.0GB. [2023-01-28 11:49:58,682 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 214.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 11:49:58,682 INFO L158 Benchmark]: CACSL2BoogieTranslator took 300.09ms. Allocated memory is still 417.3MB. Free memory was 364.0MB in the beginning and 352.6MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 11:49:58,683 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.20ms. Allocated memory is still 417.3MB. Free memory was 352.3MB in the beginning and 350.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:49:58,683 INFO L158 Benchmark]: Boogie Preprocessor took 60.76ms. Allocated memory is still 417.3MB. Free memory was 350.5MB in the beginning and 395.2MB in the end (delta: -44.7MB). Peak memory consumption was 7.8MB. Max. memory is 16.0GB. [2023-01-28 11:49:58,683 INFO L158 Benchmark]: RCFGBuilder took 585.14ms. Allocated memory is still 417.3MB. Free memory was 395.2MB in the beginning and 370.5MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-01-28 11:49:58,684 INFO L158 Benchmark]: TraceAbstraction took 797206.54ms. Allocated memory was 417.3MB in the beginning and 1.8GB in the end (delta: 1.4GB). Free memory was 369.9MB in the beginning and 1.1GB in the end (delta: -731.4MB). Peak memory consumption was 1.2GB. Max. memory is 16.0GB. [2023-01-28 11:49:58,686 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 214.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 300.09ms. Allocated memory is still 417.3MB. Free memory was 364.0MB in the beginning and 352.6MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.20ms. Allocated memory is still 417.3MB. Free memory was 352.3MB in the beginning and 350.5MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 60.76ms. Allocated memory is still 417.3MB. Free memory was 350.5MB in the beginning and 395.2MB in the end (delta: -44.7MB). Peak memory consumption was 7.8MB. Max. memory is 16.0GB. * RCFGBuilder took 585.14ms. Allocated memory is still 417.3MB. Free memory was 395.2MB in the beginning and 370.5MB in the end (delta: 24.7MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 797206.54ms. Allocated memory was 417.3MB in the beginning and 1.8GB in the end (delta: 1.4GB). Free memory was 369.9MB in the beginning and 1.1GB in the end (delta: -731.4MB). Peak memory consumption was 1.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 114 PlacesBefore, 21 PlacesAfterwards, 118 TransitionsBefore, 17 TransitionsAfterwards, 538 CoEnabledTransitionPairs, 7 FixpointIterations, 73 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 16 TrivialYvCompositions, 7 ConcurrentYvCompositions, 8 ChoiceCompositions, 121 TotalNumberOfCompositions, 676 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 567, independent: 542, independent conditional: 0, independent unconditional: 542, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 295, independent: 285, independent conditional: 0, independent unconditional: 285, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 567, independent: 257, independent conditional: 0, independent unconditional: 257, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 295, unknown conditional: 0, unknown unconditional: 295] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 98]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 9ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 9ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 25 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 9ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 138 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 797.1s, OverallIterations: 40, TraceHistogramMax: 5, PathProgramHistogramMax: 33, EmptinessCheckTime: 0.0s, AutomataDifference: 178.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.9s, HoareTripleCheckerStatistics: 184 mSolverCounterUnknown, 6616 SdHoareTripleChecker+Valid, 28.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6616 mSDsluCounter, 242 SdHoareTripleChecker+Invalid, 25.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1535 IncrementalHoareTripleChecker+Unchecked, 222 mSDsCounter, 2407 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 31667 IncrementalHoareTripleChecker+Invalid, 35793 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2407 mSolverCounterUnsat, 20 mSDtfsCounter, 31667 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2667 GetRequests, 795 SyntacticMatches, 21 SemanticMatches, 1851 ConstructedPredicates, 14 IntricatePredicates, 2 DeprecatedPredicates, 21062 ImplicationChecksByTransitivity, 140.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18703occurred in iteration=39, InterpolantAutomatonStates: 1110, 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: 0.5s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 81.7s InterpolantComputationTime, 1525 NumberOfCodeBlocks, 1523 NumberOfCodeBlocksAsserted, 117 NumberOfCheckSat, 2154 ConstructedInterpolants, 99 QuantifiedInterpolants, 45101 SizeOfPredicates, 572 NumberOfNonLiveVariables, 8674 ConjunctsInSsa, 1481 ConjunctsInUnsatCore, 111 InterpolantComputations, 4 PerfectInterpolantSequences, 256/1299 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