/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-more-queue-add-2-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 11:11:38,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 11:11:38,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 11:11:38,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 11:11:38,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 11:11:38,756 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 11:11:38,758 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 11:11:38,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 11:11:38,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 11:11:38,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 11:11:38,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 11:11:38,768 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 11:11:38,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 11:11:38,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 11:11:38,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 11:11:38,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 11:11:38,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 11:11:38,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 11:11:38,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 11:11:38,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 11:11:38,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 11:11:38,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 11:11:38,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 11:11:38,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 11:11:38,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 11:11:38,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 11:11:38,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 11:11:38,795 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 11:11:38,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 11:11:38,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 11:11:38,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 11:11:38,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 11:11:38,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 11:11:38,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 11:11:38,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 11:11:38,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 11:11:38,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 11:11:38,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 11:11:38,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 11:11:38,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 11:11:38,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 11:11:38,802 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 11:11:38,833 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 11:11:38,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 11:11:38,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 11:11:38,834 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 11:11:38,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 11:11:38,835 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 11:11:38,835 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 11:11:38,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 11:11:38,835 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 11:11:38,836 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 11:11:38,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 11:11:38,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 11:11:38,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 11:11:38,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 11:11:38,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 11:11:38,837 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 11:11:38,837 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 11:11:38,837 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 11:11:38,837 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 11:11:38,837 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 11:11:38,837 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 11:11:38,838 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 11:11:38,838 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 11:11:38,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:11:38,838 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 11:11:38,838 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 11:11:38,838 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 11:11:38,838 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 11:11:38,838 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 11:11:38,839 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 11:11:38,839 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 11:11:38,839 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 11:11:39,056 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 11:11:39,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 11:11:39,076 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 11:11:39,076 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 11:11:39,077 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 11:11:39,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-01-28 11:11:40,221 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 11:11:40,414 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 11:11:40,414 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-01-28 11:11:40,421 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/293934998/5334d1db7b9e4a4a99ca14ab4507f5fa/FLAGf282e7854 [2023-01-28 11:11:40,434 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/293934998/5334d1db7b9e4a4a99ca14ab4507f5fa [2023-01-28 11:11:40,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 11:11:40,438 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 11:11:40,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 11:11:40,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 11:11:40,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 11:11:40,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27c55f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40, skipping insertion in model container [2023-01-28 11:11:40,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 11:11:40,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 11:11:40,618 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-01-28 11:11:40,626 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:11:40,633 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 11:11:40,651 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c[2870,2883] [2023-01-28 11:11:40,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:11:40,663 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:11:40,663 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:11:40,669 INFO L208 MainTranslator]: Completed translation [2023-01-28 11:11:40,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40 WrapperNode [2023-01-28 11:11:40,669 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 11:11:40,670 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 11:11:40,670 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 11:11:40,670 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 11:11:40,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,703 INFO L138 Inliner]: procedures = 25, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 168 [2023-01-28 11:11:40,703 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 11:11:40,704 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 11:11:40,704 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 11:11:40,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 11:11:40,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,729 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,740 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,741 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 11:11:40,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 11:11:40,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 11:11:40,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 11:11:40,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (1/1) ... [2023-01-28 11:11:40,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:11:40,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:40,790 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 11:11:40,808 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 11:11:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 11:11:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 11:11:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 11:11:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 11:11:40,824 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 11:11:40,824 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 11:11:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 11:11:40,825 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 11:11:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 11:11:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 11:11:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 11:11:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 11:11:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 11:11:40,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 11:11:40,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 11:11:40,827 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 11:11:40,924 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 11:11:40,926 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 11:11:41,181 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 11:11:41,270 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 11:11:41,271 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 11:11:41,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:11:41 BoogieIcfgContainer [2023-01-28 11:11:41,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 11:11:41,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 11:11:41,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 11:11:41,277 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 11:11:41,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 11:11:40" (1/3) ... [2023-01-28 11:11:41,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b12d6a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:11:41, skipping insertion in model container [2023-01-28 11:11:41,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:11:40" (2/3) ... [2023-01-28 11:11:41,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b12d6a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:11:41, skipping insertion in model container [2023-01-28 11:11:41,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:11:41" (3/3) ... [2023-01-28 11:11:41,279 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-01-28 11:11:41,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 11:11:41,294 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 11:11:41,294 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 11:11:41,379 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 11:11:41,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 292 flow [2023-01-28 11:11:41,499 INFO L130 PetriNetUnfolder]: 11/136 cut-off events. [2023-01-28 11:11:41,499 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:11:41,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 136 events. 11/136 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-01-28 11:11:41,504 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 138 transitions, 292 flow [2023-01-28 11:11:41,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 124 places, 128 transitions, 268 flow [2023-01-28 11:11:41,512 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 11:11:41,520 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 124 places, 128 transitions, 268 flow [2023-01-28 11:11:41,522 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 124 places, 128 transitions, 268 flow [2023-01-28 11:11:41,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 268 flow [2023-01-28 11:11:41,543 INFO L130 PetriNetUnfolder]: 11/128 cut-off events. [2023-01-28 11:11:41,544 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:11:41,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 128 events. 11/128 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 77 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 101. Up to 3 conditions per place. [2023-01-28 11:11:41,545 INFO L119 LiptonReduction]: Number of co-enabled transitions 690 [2023-01-28 11:11:45,711 INFO L134 LiptonReduction]: Checked pairs total: 839 [2023-01-28 11:11:45,711 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-01-28 11:11:45,723 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 11:11:45,727 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;@73217d5c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 11:11:45,727 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 11:11:45,732 INFO L130 PetriNetUnfolder]: 3/16 cut-off events. [2023-01-28 11:11:45,732 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 11:11:45,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:45,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:45,733 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 11:11:45,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:45,737 INFO L85 PathProgramCache]: Analyzing trace with hash -272600085, now seen corresponding path program 1 times [2023-01-28 11:11:45,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:45,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003688170] [2023-01-28 11:11:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:45,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:46,166 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 11:11:46,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:46,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003688170] [2023-01-28 11:11:46,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003688170] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:11:46,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:11:46,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 11:11:46,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207903930] [2023-01-28 11:11:46,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:11:46,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:11:46,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:46,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:11:46,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:11:46,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 271 [2023-01-28 11:11:46,218 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 17 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:46,218 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:46,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 271 [2023-01-28 11:11:46,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:46,301 INFO L130 PetriNetUnfolder]: 48/91 cut-off events. [2023-01-28 11:11:46,301 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-01-28 11:11:46,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 91 events. 48/91 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 205 event pairs, 24 based on Foata normal form. 8/74 useless extension candidates. Maximal degree in co-relation 131. Up to 81 conditions per place. [2023-01-28 11:11:46,305 INFO L137 encePairwiseOnDemand]: 264/271 looper letters, 15 selfloop transitions, 2 changer transitions 6/24 dead transitions. [2023-01-28 11:11:46,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 24 transitions, 112 flow [2023-01-28 11:11:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:11:46,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:11:46,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 459 transitions. [2023-01-28 11:11:46,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42343173431734316 [2023-01-28 11:11:46,333 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 459 transitions. [2023-01-28 11:11:46,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 459 transitions. [2023-01-28 11:11:46,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:46,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 459 transitions. [2023-01-28 11:11:46,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 114.75) internal successors, (459), 4 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:46,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:46,353 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:46,354 INFO L175 Difference]: Start difference. First operand has 21 places, 17 transitions, 46 flow. Second operand 4 states and 459 transitions. [2023-01-28 11:11:46,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 24 transitions, 112 flow [2023-01-28 11:11:46,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 100 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 11:11:46,358 INFO L231 Difference]: Finished difference. Result has 22 places, 18 transitions, 58 flow [2023-01-28 11:11:46,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=22, PETRI_TRANSITIONS=18} [2023-01-28 11:11:46,363 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 1 predicate places. [2023-01-28 11:11:46,363 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 18 transitions, 58 flow [2023-01-28 11:11:46,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:46,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:46,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:46,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 11:11:46,365 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 11:11:46,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:46,366 INFO L85 PathProgramCache]: Analyzing trace with hash -799736851, now seen corresponding path program 1 times [2023-01-28 11:11:46,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:46,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197743746] [2023-01-28 11:11:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:46,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:47,021 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 11:11:47,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:47,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197743746] [2023-01-28 11:11:47,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197743746] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:11:47,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:11:47,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 11:11:47,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353719407] [2023-01-28 11:11:47,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:11:47,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 11:11:47,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:47,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 11:11:47,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-01-28 11:11:47,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 271 [2023-01-28 11:11:47,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 58 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:47,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 271 [2023-01-28 11:11:47,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:47,188 INFO L130 PetriNetUnfolder]: 78/140 cut-off events. [2023-01-28 11:11:47,188 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2023-01-28 11:11:47,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 140 events. 78/140 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 378 event pairs, 1 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 352. Up to 89 conditions per place. [2023-01-28 11:11:47,190 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 32 selfloop transitions, 13 changer transitions 5/50 dead transitions. [2023-01-28 11:11:47,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 50 transitions, 249 flow [2023-01-28 11:11:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 11:11:47,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 11:11:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 874 transitions. [2023-01-28 11:11:47,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40313653136531363 [2023-01-28 11:11:47,194 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 874 transitions. [2023-01-28 11:11:47,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 874 transitions. [2023-01-28 11:11:47,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:47,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 874 transitions. [2023-01-28 11:11:47,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 109.25) internal successors, (874), 8 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,203 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,203 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 58 flow. Second operand 8 states and 874 transitions. [2023-01-28 11:11:47,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 50 transitions, 249 flow [2023-01-28 11:11:47,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 50 transitions, 245 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 11:11:47,206 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 147 flow [2023-01-28 11:11:47,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=147, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-01-28 11:11:47,207 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 10 predicate places. [2023-01-28 11:11:47,207 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 147 flow [2023-01-28 11:11:47,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:47,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:47,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 11:11:47,209 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 11:11:47,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:47,212 INFO L85 PathProgramCache]: Analyzing trace with hash 143763307, now seen corresponding path program 2 times [2023-01-28 11:11:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:47,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244221984] [2023-01-28 11:11:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:47,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:47,633 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 11:11:47,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:47,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244221984] [2023-01-28 11:11:47,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244221984] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:11:47,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:11:47,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 11:11:47,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482473954] [2023-01-28 11:11:47,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:11:47,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 11:11:47,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:47,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 11:11:47,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 11:11:47,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 271 [2023-01-28 11:11:47,639 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 147 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,639 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:47,639 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 271 [2023-01-28 11:11:47,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:47,758 INFO L130 PetriNetUnfolder]: 88/156 cut-off events. [2023-01-28 11:11:47,759 INFO L131 PetriNetUnfolder]: For 114/114 co-relation queries the response was YES. [2023-01-28 11:11:47,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 156 events. 88/156 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 408 event pairs, 9 based on Foata normal form. 1/127 useless extension candidates. Maximal degree in co-relation 559. Up to 120 conditions per place. [2023-01-28 11:11:47,762 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 17 changer transitions 5/51 dead transitions. [2023-01-28 11:11:47,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 51 transitions, 345 flow [2023-01-28 11:11:47,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 11:11:47,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 11:11:47,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 869 transitions. [2023-01-28 11:11:47,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.400830258302583 [2023-01-28 11:11:47,765 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 869 transitions. [2023-01-28 11:11:47,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 869 transitions. [2023-01-28 11:11:47,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:47,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 869 transitions. [2023-01-28 11:11:47,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 108.625) internal successors, (869), 8 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,773 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,773 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 147 flow. Second operand 8 states and 869 transitions. [2023-01-28 11:11:47,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 51 transitions, 345 flow [2023-01-28 11:11:47,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 51 transitions, 299 flow, removed 22 selfloop flow, removed 2 redundant places. [2023-01-28 11:11:47,777 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 222 flow [2023-01-28 11:11:47,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=222, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-01-28 11:11:47,779 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 18 predicate places. [2023-01-28 11:11:47,780 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 222 flow [2023-01-28 11:11:47,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:47,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:47,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 11:11:47,783 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 11:11:47,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:47,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1615625679, now seen corresponding path program 3 times [2023-01-28 11:11:47,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:47,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065701447] [2023-01-28 11:11:47,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:47,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:47,870 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 11:11:47,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:47,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065701447] [2023-01-28 11:11:47,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065701447] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:11:47,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:11:47,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 11:11:47,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830927003] [2023-01-28 11:11:47,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:11:47,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 11:11:47,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 11:11:47,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 11:11:47,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-01-28 11:11:47,874 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,875 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:47,875 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-01-28 11:11:47,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:47,921 INFO L130 PetriNetUnfolder]: 63/119 cut-off events. [2023-01-28 11:11:47,922 INFO L131 PetriNetUnfolder]: For 122/125 co-relation queries the response was YES. [2023-01-28 11:11:47,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 119 events. 63/119 cut-off events. For 122/125 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 297 event pairs, 10 based on Foata normal form. 9/108 useless extension candidates. Maximal degree in co-relation 435. Up to 103 conditions per place. [2023-01-28 11:11:47,923 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 25 selfloop transitions, 7 changer transitions 0/34 dead transitions. [2023-01-28 11:11:47,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 243 flow [2023-01-28 11:11:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 11:11:47,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 11:11:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-01-28 11:11:47,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46494464944649444 [2023-01-28 11:11:47,925 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-01-28 11:11:47,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-01-28 11:11:47,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:47,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-01-28 11:11:47,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,932 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,932 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 222 flow. Second operand 3 states and 378 transitions. [2023-01-28 11:11:47,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 243 flow [2023-01-28 11:11:47,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 222 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-01-28 11:11:47,936 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 165 flow [2023-01-28 11:11:47,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-01-28 11:11:47,938 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 14 predicate places. [2023-01-28 11:11:47,938 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 165 flow [2023-01-28 11:11:47,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.66666666666667) internal successors, (368), 3 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:47,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:47,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:47,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 11:11:47,938 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 11:11:47,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:47,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2042112127, now seen corresponding path program 4 times [2023-01-28 11:11:47,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:47,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493170196] [2023-01-28 11:11:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:47,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:48,363 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 11:11:48,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:48,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493170196] [2023-01-28 11:11:48,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493170196] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:11:48,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:11:48,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 11:11:48,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786181184] [2023-01-28 11:11:48,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:11:48,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 11:11:48,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:48,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 11:11:48,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-01-28 11:11:48,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 271 [2023-01-28 11:11:48,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:48,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:48,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 271 [2023-01-28 11:11:48,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:48,480 INFO L130 PetriNetUnfolder]: 66/130 cut-off events. [2023-01-28 11:11:48,480 INFO L131 PetriNetUnfolder]: For 107/107 co-relation queries the response was YES. [2023-01-28 11:11:48,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 466 conditions, 130 events. 66/130 cut-off events. For 107/107 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 353 event pairs, 11 based on Foata normal form. 1/113 useless extension candidates. Maximal degree in co-relation 442. Up to 94 conditions per place. [2023-01-28 11:11:48,481 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 29 selfloop transitions, 12 changer transitions 5/46 dead transitions. [2023-01-28 11:11:48,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 46 transitions, 296 flow [2023-01-28 11:11:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 11:11:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 11:11:48,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 864 transitions. [2023-01-28 11:11:48,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985239852398524 [2023-01-28 11:11:48,485 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 864 transitions. [2023-01-28 11:11:48,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 864 transitions. [2023-01-28 11:11:48,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:48,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 864 transitions. [2023-01-28 11:11:48,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 108.0) internal successors, (864), 8 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:48,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:48,490 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:48,491 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 165 flow. Second operand 8 states and 864 transitions. [2023-01-28 11:11:48,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 46 transitions, 296 flow [2023-01-28 11:11:48,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 282 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 11:11:48,493 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 185 flow [2023-01-28 11:11:48,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=185, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2023-01-28 11:11:48,495 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 21 predicate places. [2023-01-28 11:11:48,495 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 185 flow [2023-01-28 11:11:48,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 104.875) internal successors, (839), 8 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:48,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:48,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:48,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 11:11:48,496 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 11:11:48,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:48,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1023024236, now seen corresponding path program 1 times [2023-01-28 11:11:48,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:48,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637531807] [2023-01-28 11:11:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:48,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:48,599 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 11:11:48,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:48,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637531807] [2023-01-28 11:11:48,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637531807] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:48,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072389852] [2023-01-28 11:11:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:48,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:48,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:48,609 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 11:11:48,652 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 11:11:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:48,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:11:48,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:48,803 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 11:11:48,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:48,853 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 11:11:48,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072389852] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:48,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:48,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 11:11:48,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931418658] [2023-01-28 11:11:48,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:48,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 11:11:48,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:48,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 11:11:48,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 11:11:48,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 271 [2023-01-28 11:11:48,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 185 flow. Second operand has 12 states, 12 states have (on average 108.08333333333333) internal successors, (1297), 12 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:48,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:48,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 271 [2023-01-28 11:11:48,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:48,977 INFO L130 PetriNetUnfolder]: 98/203 cut-off events. [2023-01-28 11:11:48,977 INFO L131 PetriNetUnfolder]: For 311/325 co-relation queries the response was YES. [2023-01-28 11:11:48,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 776 conditions, 203 events. 98/203 cut-off events. For 311/325 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 697 event pairs, 36 based on Foata normal form. 14/197 useless extension candidates. Maximal degree in co-relation 757. Up to 112 conditions per place. [2023-01-28 11:11:48,979 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 46 selfloop transitions, 7 changer transitions 4/59 dead transitions. [2023-01-28 11:11:48,979 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 451 flow [2023-01-28 11:11:48,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:11:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:11:48,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 674 transitions. [2023-01-28 11:11:48,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4145141451414514 [2023-01-28 11:11:48,981 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 674 transitions. [2023-01-28 11:11:48,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 674 transitions. [2023-01-28 11:11:48,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:48,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 674 transitions. [2023-01-28 11:11:48,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 112.33333333333333) internal successors, (674), 6 states have internal predecessors, (674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:48,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:48,986 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:48,986 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 185 flow. Second operand 6 states and 674 transitions. [2023-01-28 11:11:48,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 451 flow [2023-01-28 11:11:48,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 59 transitions, 401 flow, removed 6 selfloop flow, removed 6 redundant places. [2023-01-28 11:11:48,989 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 238 flow [2023-01-28 11:11:48,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-01-28 11:11:48,990 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 22 predicate places. [2023-01-28 11:11:48,990 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 238 flow [2023-01-28 11:11:48,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 108.08333333333333) internal successors, (1297), 12 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:48,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:48,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:49,000 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 11:11:49,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-01-28 11:11:49,198 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 11:11:49,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:49,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1249123538, now seen corresponding path program 1 times [2023-01-28 11:11:49,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:49,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362336129] [2023-01-28 11:11:49,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:49,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:49,286 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 11:11:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:49,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362336129] [2023-01-28 11:11:49,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362336129] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:11:49,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:11:49,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 11:11:49,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997815043] [2023-01-28 11:11:49,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:11:49,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:11:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:49,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:11:49,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-01-28 11:11:49,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-01-28 11:11:49,289 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:49,289 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:49,289 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-01-28 11:11:49,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:49,361 INFO L130 PetriNetUnfolder]: 109/232 cut-off events. [2023-01-28 11:11:49,361 INFO L131 PetriNetUnfolder]: For 320/334 co-relation queries the response was YES. [2023-01-28 11:11:49,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 232 events. 109/232 cut-off events. For 320/334 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 828 event pairs, 15 based on Foata normal form. 16/216 useless extension candidates. Maximal degree in co-relation 646. Up to 83 conditions per place. [2023-01-28 11:11:49,363 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 34 selfloop transitions, 10 changer transitions 11/57 dead transitions. [2023-01-28 11:11:49,363 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 432 flow [2023-01-28 11:11:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:11:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:11:49,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 512 transitions. [2023-01-28 11:11:49,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47232472324723246 [2023-01-28 11:11:49,365 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 512 transitions. [2023-01-28 11:11:49,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 512 transitions. [2023-01-28 11:11:49,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:49,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 512 transitions. [2023-01-28 11:11:49,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:49,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:49,368 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:49,369 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 238 flow. Second operand 4 states and 512 transitions. [2023-01-28 11:11:49,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 432 flow [2023-01-28 11:11:49,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 407 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-01-28 11:11:49,371 INFO L231 Difference]: Finished difference. Result has 45 places, 31 transitions, 214 flow [2023-01-28 11:11:49,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=45, PETRI_TRANSITIONS=31} [2023-01-28 11:11:49,372 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 24 predicate places. [2023-01-28 11:11:49,372 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 31 transitions, 214 flow [2023-01-28 11:11:49,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.0) internal successors, (605), 5 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:49,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:49,372 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:49,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 11:11:49,373 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 11:11:49,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash 935567924, now seen corresponding path program 2 times [2023-01-28 11:11:49,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:49,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946078609] [2023-01-28 11:11:49,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:49,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:49,860 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 11:11:49,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:49,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946078609] [2023-01-28 11:11:49,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946078609] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:49,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793635675] [2023-01-28 11:11:49,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:11:49,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:49,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:49,862 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 11:11:49,867 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 11:11:50,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:11:50,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:50,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 11:11:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:50,220 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 11:11:50,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:50,291 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:11:50,292 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 11:11:50,428 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 11:11:50,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793635675] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:50,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:50,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2023-01-28 11:11:50,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295101951] [2023-01-28 11:11:50,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:50,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 11:11:50,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:50,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 11:11:50,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2023-01-28 11:11:50,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2023-01-28 11:11:50,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 31 transitions, 214 flow. Second operand has 20 states, 20 states have (on average 95.95) internal successors, (1919), 20 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:50,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:50,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2023-01-28 11:11:50,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:50,981 INFO L130 PetriNetUnfolder]: 261/504 cut-off events. [2023-01-28 11:11:50,982 INFO L131 PetriNetUnfolder]: For 771/785 co-relation queries the response was YES. [2023-01-28 11:11:50,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2219 conditions, 504 events. 261/504 cut-off events. For 771/785 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2184 event pairs, 30 based on Foata normal form. 6/389 useless extension candidates. Maximal degree in co-relation 1540. Up to 263 conditions per place. [2023-01-28 11:11:50,986 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 92 selfloop transitions, 49 changer transitions 0/143 dead transitions. [2023-01-28 11:11:50,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 143 transitions, 1152 flow [2023-01-28 11:11:50,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 11:11:50,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 11:11:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1903 transitions. [2023-01-28 11:11:50,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695863274422218 [2023-01-28 11:11:50,992 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1903 transitions. [2023-01-28 11:11:50,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1903 transitions. [2023-01-28 11:11:50,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:50,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1903 transitions. [2023-01-28 11:11:50,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 100.15789473684211) internal successors, (1903), 19 states have internal predecessors, (1903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:51,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:51,005 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:51,005 INFO L175 Difference]: Start difference. First operand has 45 places, 31 transitions, 214 flow. Second operand 19 states and 1903 transitions. [2023-01-28 11:11:51,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 143 transitions, 1152 flow [2023-01-28 11:11:51,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 143 transitions, 959 flow, removed 93 selfloop flow, removed 3 redundant places. [2023-01-28 11:11:51,010 INFO L231 Difference]: Finished difference. Result has 63 places, 83 transitions, 708 flow [2023-01-28 11:11:51,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=708, PETRI_PLACES=63, PETRI_TRANSITIONS=83} [2023-01-28 11:11:51,011 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 42 predicate places. [2023-01-28 11:11:51,011 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 83 transitions, 708 flow [2023-01-28 11:11:51,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 95.95) internal successors, (1919), 20 states have internal predecessors, (1919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:51,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:51,012 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:51,023 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 11:11:51,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-01-28 11:11:51,218 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 11:11:51,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:51,218 INFO L85 PathProgramCache]: Analyzing trace with hash -912937574, now seen corresponding path program 3 times [2023-01-28 11:11:51,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:51,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454240690] [2023-01-28 11:11:51,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:51,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:51,691 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 11:11:51,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:51,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454240690] [2023-01-28 11:11:51,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454240690] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:51,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123604517] [2023-01-28 11:11:51,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:11:51,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:51,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:51,693 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 11:11:51,719 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 11:11:51,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:11:51,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:51,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 11:11:51,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:52,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:11:52,039 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 11:11:52,078 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 11:11:52,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:52,110 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_187 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_187) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 0))) is different from false [2023-01-28 11:11:52,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:11:52,196 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 11:11:52,202 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 11:11:52,482 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 11:11:52,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123604517] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:52,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:52,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-01-28 11:11:52,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68985499] [2023-01-28 11:11:52,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:52,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 11:11:52,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:52,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 11:11:52,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=464, Unknown=1, NotChecked=44, Total=600 [2023-01-28 11:11:52,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-01-28 11:11:52,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 83 transitions, 708 flow. Second operand has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:52,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:52,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-01-28 11:11:52,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:54,661 INFO L130 PetriNetUnfolder]: 498/965 cut-off events. [2023-01-28 11:11:54,661 INFO L131 PetriNetUnfolder]: For 2937/2937 co-relation queries the response was YES. [2023-01-28 11:11:54,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4460 conditions, 965 events. 498/965 cut-off events. For 2937/2937 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4896 event pairs, 45 based on Foata normal form. 32/934 useless extension candidates. Maximal degree in co-relation 3642. Up to 347 conditions per place. [2023-01-28 11:11:54,669 INFO L137 encePairwiseOnDemand]: 257/271 looper letters, 146 selfloop transitions, 112 changer transitions 2/260 dead transitions. [2023-01-28 11:11:54,669 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 260 transitions, 2437 flow [2023-01-28 11:11:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 11:11:54,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 11:11:54,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2592 transitions. [2023-01-28 11:11:54,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31881918819188193 [2023-01-28 11:11:54,678 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2592 transitions. [2023-01-28 11:11:54,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2592 transitions. [2023-01-28 11:11:54,679 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:54,679 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2592 transitions. [2023-01-28 11:11:54,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 86.4) internal successors, (2592), 30 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:54,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:54,697 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:54,697 INFO L175 Difference]: Start difference. First operand has 63 places, 83 transitions, 708 flow. Second operand 30 states and 2592 transitions. [2023-01-28 11:11:54,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 260 transitions, 2437 flow [2023-01-28 11:11:54,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 260 transitions, 2254 flow, removed 82 selfloop flow, removed 3 redundant places. [2023-01-28 11:11:54,717 INFO L231 Difference]: Finished difference. Result has 105 places, 172 transitions, 1847 flow [2023-01-28 11:11:54,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1847, PETRI_PLACES=105, PETRI_TRANSITIONS=172} [2023-01-28 11:11:54,718 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 84 predicate places. [2023-01-28 11:11:54,718 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 172 transitions, 1847 flow [2023-01-28 11:11:54,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.72) internal successors, (2068), 25 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:54,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:54,719 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:11:54,731 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 11:11:54,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:54,925 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 11:11:54,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:54,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1416627676, now seen corresponding path program 4 times [2023-01-28 11:11:54,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:54,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401510773] [2023-01-28 11:11:54,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:54,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:55,590 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 11:11:55,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:55,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401510773] [2023-01-28 11:11:55,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401510773] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:55,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205860066] [2023-01-28 11:11:55,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:11:55,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:55,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:55,592 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 11:11:55,594 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 11:11:55,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:11:55,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:11:55,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 11:11:55,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:11:55,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:55,846 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:11:55,846 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 11:11:55,903 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 11:11:55,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205860066] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:55,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 11:11:55,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10, 7] total 19 [2023-01-28 11:11:55,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460263299] [2023-01-28 11:11:55,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:11:55,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 11:11:55,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:55,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 11:11:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-01-28 11:11:55,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 271 [2023-01-28 11:11:55,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 172 transitions, 1847 flow. Second operand has 6 states, 6 states have (on average 102.66666666666667) internal successors, (616), 6 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:55,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:55,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 271 [2023-01-28 11:11:55,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:11:56,116 INFO L130 PetriNetUnfolder]: 495/934 cut-off events. [2023-01-28 11:11:56,116 INFO L131 PetriNetUnfolder]: For 6085/6085 co-relation queries the response was YES. [2023-01-28 11:11:56,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5535 conditions, 934 events. 495/934 cut-off events. For 6085/6085 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4588 event pairs, 81 based on Foata normal form. 2/936 useless extension candidates. Maximal degree in co-relation 5497. Up to 400 conditions per place. [2023-01-28 11:11:56,126 INFO L137 encePairwiseOnDemand]: 265/271 looper letters, 122 selfloop transitions, 66 changer transitions 1/189 dead transitions. [2023-01-28 11:11:56,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 189 transitions, 2376 flow [2023-01-28 11:11:56,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:11:56,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:11:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 641 transitions. [2023-01-28 11:11:56,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942189421894219 [2023-01-28 11:11:56,129 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 641 transitions. [2023-01-28 11:11:56,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 641 transitions. [2023-01-28 11:11:56,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:11:56,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 641 transitions. [2023-01-28 11:11:56,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 106.83333333333333) internal successors, (641), 6 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:56,133 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:56,134 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 271.0) internal successors, (1897), 7 states have internal predecessors, (1897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:56,134 INFO L175 Difference]: Start difference. First operand has 105 places, 172 transitions, 1847 flow. Second operand 6 states and 641 transitions. [2023-01-28 11:11:56,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 189 transitions, 2376 flow [2023-01-28 11:11:56,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 189 transitions, 2126 flow, removed 118 selfloop flow, removed 7 redundant places. [2023-01-28 11:11:56,174 INFO L231 Difference]: Finished difference. Result has 100 places, 169 transitions, 1777 flow [2023-01-28 11:11:56,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1521, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1777, PETRI_PLACES=100, PETRI_TRANSITIONS=169} [2023-01-28 11:11:56,176 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 79 predicate places. [2023-01-28 11:11:56,176 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 169 transitions, 1777 flow [2023-01-28 11:11:56,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 102.66666666666667) internal successors, (616), 6 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:56,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:11:56,177 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 11:11:56,186 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 11:11:56,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:56,386 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 11:11:56,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:11:56,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1886042083, now seen corresponding path program 1 times [2023-01-28 11:11:56,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:11:56,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538084507] [2023-01-28 11:11:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:56,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:11:56,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:57,241 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 11:11:57,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:11:57,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538084507] [2023-01-28 11:11:57,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538084507] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:11:57,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076068265] [2023-01-28 11:11:57,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:11:57,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:11:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:11:57,245 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 11:11:57,269 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 11:11:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:11:57,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-28 11:11:57,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:11:57,731 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 11:11:57,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:11:57,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:11:57,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-01-28 11:11:58,283 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 11:11:58,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076068265] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:11:58,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:11:58,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 27 [2023-01-28 11:11:58,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127294284] [2023-01-28 11:11:58,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:11:58,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 11:11:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:11:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 11:11:58,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-01-28 11:11:58,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:11:58,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 169 transitions, 1777 flow. Second operand has 29 states, 29 states have (on average 76.82758620689656) internal successors, (2228), 29 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:11:58,291 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:11:58,292 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:11:58,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:00,037 INFO L130 PetriNetUnfolder]: 532/1008 cut-off events. [2023-01-28 11:12:00,038 INFO L131 PetriNetUnfolder]: For 6967/6967 co-relation queries the response was YES. [2023-01-28 11:12:00,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5818 conditions, 1008 events. 532/1008 cut-off events. For 6967/6967 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5106 event pairs, 69 based on Foata normal form. 2/1010 useless extension candidates. Maximal degree in co-relation 5781. Up to 500 conditions per place. [2023-01-28 11:12:00,049 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 144 selfloop transitions, 83 changer transitions 7/234 dead transitions. [2023-01-28 11:12:00,049 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 234 transitions, 2775 flow [2023-01-28 11:12:00,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 11:12:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 11:12:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1592 transitions. [2023-01-28 11:12:00,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2937269372693727 [2023-01-28 11:12:00,055 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1592 transitions. [2023-01-28 11:12:00,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1592 transitions. [2023-01-28 11:12:00,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:00,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1592 transitions. [2023-01-28 11:12:00,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 79.6) internal successors, (1592), 20 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:00,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:00,077 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:00,078 INFO L175 Difference]: Start difference. First operand has 100 places, 169 transitions, 1777 flow. Second operand 20 states and 1592 transitions. [2023-01-28 11:12:00,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 234 transitions, 2775 flow [2023-01-28 11:12:00,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 234 transitions, 2747 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-01-28 11:12:00,118 INFO L231 Difference]: Finished difference. Result has 125 places, 186 transitions, 2181 flow [2023-01-28 11:12:00,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2181, PETRI_PLACES=125, PETRI_TRANSITIONS=186} [2023-01-28 11:12:00,119 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 104 predicate places. [2023-01-28 11:12:00,119 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 186 transitions, 2181 flow [2023-01-28 11:12:00,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.82758620689656) internal successors, (2228), 29 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:00,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:00,120 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 11:12:00,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 11:12:00,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 11:12:00,327 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 11:12:00,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:00,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2035982271, now seen corresponding path program 2 times [2023-01-28 11:12:00,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:00,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982567233] [2023-01-28 11:12:00,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:00,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:01,198 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 11:12:01,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:01,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982567233] [2023-01-28 11:12:01,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982567233] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:01,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666515600] [2023-01-28 11:12:01,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:12:01,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:01,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:01,200 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 11:12:01,202 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 11:12:01,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:12:01,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:01,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-28 11:12:01,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:01,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-01-28 11:12:01,784 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 11:12:01,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:02,126 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:02,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-01-28 11:12:02,353 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 11:12:02,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666515600] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:02,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:02,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 26 [2023-01-28 11:12:02,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930264702] [2023-01-28 11:12:02,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:02,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 11:12:02,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:02,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 11:12:02,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-01-28 11:12:02,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:12:02,359 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 186 transitions, 2181 flow. Second operand has 28 states, 28 states have (on average 76.89285714285714) internal successors, (2153), 28 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:02,360 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:02,360 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:12:02,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:03,568 INFO L130 PetriNetUnfolder]: 594/1157 cut-off events. [2023-01-28 11:12:03,569 INFO L131 PetriNetUnfolder]: For 9032/9032 co-relation queries the response was YES. [2023-01-28 11:12:03,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7172 conditions, 1157 events. 594/1157 cut-off events. For 9032/9032 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 6337 event pairs, 60 based on Foata normal form. 2/1159 useless extension candidates. Maximal degree in co-relation 7127. Up to 849 conditions per place. [2023-01-28 11:12:03,580 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 182 selfloop transitions, 80 changer transitions 6/268 dead transitions. [2023-01-28 11:12:03,580 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 268 transitions, 3315 flow [2023-01-28 11:12:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 11:12:03,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 11:12:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1686 transitions. [2023-01-28 11:12:03,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2962572482867686 [2023-01-28 11:12:03,584 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1686 transitions. [2023-01-28 11:12:03,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1686 transitions. [2023-01-28 11:12:03,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:03,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1686 transitions. [2023-01-28 11:12:03,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 80.28571428571429) internal successors, (1686), 21 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:03,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:03,594 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 271.0) internal successors, (5962), 22 states have internal predecessors, (5962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:03,594 INFO L175 Difference]: Start difference. First operand has 125 places, 186 transitions, 2181 flow. Second operand 21 states and 1686 transitions. [2023-01-28 11:12:03,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 268 transitions, 3315 flow [2023-01-28 11:12:03,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 268 transitions, 3234 flow, removed 23 selfloop flow, removed 7 redundant places. [2023-01-28 11:12:03,637 INFO L231 Difference]: Finished difference. Result has 144 places, 211 transitions, 2648 flow [2023-01-28 11:12:03,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2102, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2648, PETRI_PLACES=144, PETRI_TRANSITIONS=211} [2023-01-28 11:12:03,638 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 123 predicate places. [2023-01-28 11:12:03,638 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 211 transitions, 2648 flow [2023-01-28 11:12:03,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.89285714285714) internal successors, (2153), 28 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:03,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:03,639 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:12:03,645 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 11:12:03,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:03,845 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 11:12:03,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:03,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1472029166, now seen corresponding path program 5 times [2023-01-28 11:12:03,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:03,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613771688] [2023-01-28 11:12:03,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:03,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:04,627 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 11:12:04,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:04,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613771688] [2023-01-28 11:12:04,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613771688] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:04,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983039272] [2023-01-28 11:12:04,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:12:04,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:04,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:04,629 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 11:12:04,648 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 11:12:04,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:12:04,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:04,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 35 conjunts are in the unsatisfiable core [2023-01-28 11:12:04,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:04,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:12:04,877 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 11:12:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:04,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:04,969 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:04,969 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 11:12:04,973 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 11:12:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:12:05,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983039272] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:05,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:05,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 21 [2023-01-28 11:12:05,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725256659] [2023-01-28 11:12:05,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:05,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 11:12:05,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:05,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 11:12:05,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-01-28 11:12:05,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-01-28 11:12:05,080 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 211 transitions, 2648 flow. Second operand has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:05,080 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:05,080 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-01-28 11:12:05,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:06,220 INFO L130 PetriNetUnfolder]: 709/1363 cut-off events. [2023-01-28 11:12:06,221 INFO L131 PetriNetUnfolder]: For 14118/14118 co-relation queries the response was YES. [2023-01-28 11:12:06,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9067 conditions, 1363 events. 709/1363 cut-off events. For 14118/14118 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 7680 event pairs, 56 based on Foata normal form. 16/1379 useless extension candidates. Maximal degree in co-relation 9015. Up to 461 conditions per place. [2023-01-28 11:12:06,236 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 168 selfloop transitions, 138 changer transitions 2/308 dead transitions. [2023-01-28 11:12:06,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 308 transitions, 4300 flow [2023-01-28 11:12:06,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 11:12:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 11:12:06,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1633 transitions. [2023-01-28 11:12:06,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31714896096329387 [2023-01-28 11:12:06,240 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1633 transitions. [2023-01-28 11:12:06,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1633 transitions. [2023-01-28 11:12:06,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:06,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1633 transitions. [2023-01-28 11:12:06,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 85.94736842105263) internal successors, (1633), 19 states have internal predecessors, (1633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:06,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:06,249 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:06,249 INFO L175 Difference]: Start difference. First operand has 144 places, 211 transitions, 2648 flow. Second operand 19 states and 1633 transitions. [2023-01-28 11:12:06,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 308 transitions, 4300 flow [2023-01-28 11:12:06,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 308 transitions, 4147 flow, removed 38 selfloop flow, removed 10 redundant places. [2023-01-28 11:12:06,318 INFO L231 Difference]: Finished difference. Result has 156 places, 244 transitions, 3437 flow [2023-01-28 11:12:06,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=2526, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3437, PETRI_PLACES=156, PETRI_TRANSITIONS=244} [2023-01-28 11:12:06,319 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 135 predicate places. [2023-01-28 11:12:06,319 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 244 transitions, 3437 flow [2023-01-28 11:12:06,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 83.0909090909091) internal successors, (1828), 22 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:06,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:06,320 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 11:12:06,331 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 11:12:06,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:06,526 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 11:12:06,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash 154671513, now seen corresponding path program 3 times [2023-01-28 11:12:06,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:06,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246714280] [2023-01-28 11:12:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:06,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:07,361 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 11:12:07,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:07,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246714280] [2023-01-28 11:12:07,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246714280] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:07,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934348834] [2023-01-28 11:12:07,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:12:07,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:07,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:07,363 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 11:12:07,365 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 11:12:07,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:12:07,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:07,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 11:12:07,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:08,207 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 11:12:08,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:08,413 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:08,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-01-28 11:12:08,595 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 11:12:08,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934348834] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:08,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:08,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2023-01-28 11:12:08,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162042940] [2023-01-28 11:12:08,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:08,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 11:12:08,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:08,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 11:12:08,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2023-01-28 11:12:08,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:12:08,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 244 transitions, 3437 flow. Second operand has 27 states, 27 states have (on average 76.96296296296296) internal successors, (2078), 27 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:08,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:08,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:12:08,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:09,449 INFO L130 PetriNetUnfolder]: 716/1388 cut-off events. [2023-01-28 11:12:09,449 INFO L131 PetriNetUnfolder]: For 16099/16099 co-relation queries the response was YES. [2023-01-28 11:12:09,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9866 conditions, 1388 events. 716/1388 cut-off events. For 16099/16099 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7948 event pairs, 161 based on Foata normal form. 2/1390 useless extension candidates. Maximal degree in co-relation 9809. Up to 1204 conditions per place. [2023-01-28 11:12:09,464 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 211 selfloop transitions, 56 changer transitions 14/281 dead transitions. [2023-01-28 11:12:09,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 281 transitions, 4234 flow [2023-01-28 11:12:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 11:12:09,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 11:12:09,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1432 transitions. [2023-01-28 11:12:09,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2935629356293563 [2023-01-28 11:12:09,467 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1432 transitions. [2023-01-28 11:12:09,467 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1432 transitions. [2023-01-28 11:12:09,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:09,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1432 transitions. [2023-01-28 11:12:09,470 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 79.55555555555556) internal successors, (1432), 18 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:09,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:09,475 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 271.0) internal successors, (5149), 19 states have internal predecessors, (5149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:09,475 INFO L175 Difference]: Start difference. First operand has 156 places, 244 transitions, 3437 flow. Second operand 18 states and 1432 transitions. [2023-01-28 11:12:09,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 281 transitions, 4234 flow [2023-01-28 11:12:09,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 281 transitions, 4131 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-01-28 11:12:09,558 INFO L231 Difference]: Finished difference. Result has 167 places, 246 transitions, 3489 flow [2023-01-28 11:12:09,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3334, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=3489, PETRI_PLACES=167, PETRI_TRANSITIONS=246} [2023-01-28 11:12:09,559 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 146 predicate places. [2023-01-28 11:12:09,559 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 246 transitions, 3489 flow [2023-01-28 11:12:09,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 76.96296296296296) internal successors, (2078), 27 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:09,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:09,560 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 11:12:09,571 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 11:12:09,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 11:12:09,766 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 11:12:09,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:09,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1818685831, now seen corresponding path program 4 times [2023-01-28 11:12:09,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:09,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762410598] [2023-01-28 11:12:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:09,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:10,597 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 11:12:10,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:10,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762410598] [2023-01-28 11:12:10,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762410598] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:10,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708318060] [2023-01-28 11:12:10,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:12:10,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:10,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:10,599 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 11:12:10,602 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 11:12:10,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:12:10,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:10,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 11:12:10,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:10,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-01-28 11:12:10,822 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 11:12:10,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:12:10,928 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 11:12:11,277 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 11:12:11,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:12,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:12,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2023-01-28 11:12:12,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2023-01-28 11:12:12,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-01-28 11:12:12,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-01-28 11:12:12,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-01-28 11:12:12,396 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:12,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 61 [2023-01-28 11:12:12,406 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:12:12,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 271 [2023-01-28 11:12:12,416 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:12:12,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 80 [2023-01-28 11:12:12,427 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 11:12:12,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2023-01-28 11:12:12,443 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-01-28 11:12:12,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 1 [2023-01-28 11:12:12,522 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 11:12:12,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708318060] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:12,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:12,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-01-28 11:12:12,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621113365] [2023-01-28 11:12:12,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:12,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 11:12:12,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:12,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 11:12:12,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=958, Unknown=5, NotChecked=0, Total=1122 [2023-01-28 11:12:12,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 11:12:12,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 246 transitions, 3489 flow. Second operand has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:12,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:12,527 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 11:12:12,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:17,538 INFO L130 PetriNetUnfolder]: 834/1618 cut-off events. [2023-01-28 11:12:17,538 INFO L131 PetriNetUnfolder]: For 21389/21389 co-relation queries the response was YES. [2023-01-28 11:12:17,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12002 conditions, 1618 events. 834/1618 cut-off events. For 21389/21389 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 9617 event pairs, 64 based on Foata normal form. 4/1622 useless extension candidates. Maximal degree in co-relation 11940. Up to 858 conditions per place. [2023-01-28 11:12:17,551 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 184 selfloop transitions, 179 changer transitions 11/374 dead transitions. [2023-01-28 11:12:17,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 374 transitions, 5695 flow [2023-01-28 11:12:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 11:12:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 11:12:17,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2253 transitions. [2023-01-28 11:12:17,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26818235924294725 [2023-01-28 11:12:17,555 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2253 transitions. [2023-01-28 11:12:17,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2253 transitions. [2023-01-28 11:12:17,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:17,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2253 transitions. [2023-01-28 11:12:17,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 72.6774193548387) internal successors, (2253), 31 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:17,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:17,566 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:17,566 INFO L175 Difference]: Start difference. First operand has 167 places, 246 transitions, 3489 flow. Second operand 31 states and 2253 transitions. [2023-01-28 11:12:17,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 374 transitions, 5695 flow [2023-01-28 11:12:17,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 374 transitions, 5549 flow, removed 8 selfloop flow, removed 14 redundant places. [2023-01-28 11:12:17,662 INFO L231 Difference]: Finished difference. Result has 192 places, 304 transitions, 4934 flow [2023-01-28 11:12:17,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=4934, PETRI_PLACES=192, PETRI_TRANSITIONS=304} [2023-01-28 11:12:17,663 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 171 predicate places. [2023-01-28 11:12:17,663 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 304 transitions, 4934 flow [2023-01-28 11:12:17,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 69.58823529411765) internal successors, (2366), 34 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:17,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:17,664 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 11:12:17,670 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 11:12:17,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 11:12:17,870 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 11:12:17,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:17,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2088997291, now seen corresponding path program 5 times [2023-01-28 11:12:17,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:17,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524048782] [2023-01-28 11:12:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:17,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:17,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:18,548 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 11:12:18,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:18,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524048782] [2023-01-28 11:12:18,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524048782] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:18,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316699419] [2023-01-28 11:12:18,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:12:18,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:18,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:18,553 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 11:12:18,584 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 11:12:18,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:12:18,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:18,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 11:12:18,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:18,982 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 11:12:18,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:19,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:19,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2023-01-28 11:12:19,516 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 11:12:19,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316699419] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:19,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:19,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-01-28 11:12:19,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466750678] [2023-01-28 11:12:19,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:19,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 11:12:19,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 11:12:19,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-01-28 11:12:19,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:12:19,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 304 transitions, 4934 flow. Second operand has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,524 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:19,524 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:12:19,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:21,587 INFO L130 PetriNetUnfolder]: 841/1627 cut-off events. [2023-01-28 11:12:21,588 INFO L131 PetriNetUnfolder]: For 25619/25619 co-relation queries the response was YES. [2023-01-28 11:12:21,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13059 conditions, 1627 events. 841/1627 cut-off events. For 25619/25619 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 9680 event pairs, 112 based on Foata normal form. 2/1629 useless extension candidates. Maximal degree in co-relation 12988. Up to 938 conditions per place. [2023-01-28 11:12:21,605 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 225 selfloop transitions, 113 changer transitions 14/352 dead transitions. [2023-01-28 11:12:21,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 352 transitions, 6148 flow [2023-01-28 11:12:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 11:12:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 11:12:21,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1578 transitions. [2023-01-28 11:12:21,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2911439114391144 [2023-01-28 11:12:21,608 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1578 transitions. [2023-01-28 11:12:21,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1578 transitions. [2023-01-28 11:12:21,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:21,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1578 transitions. [2023-01-28 11:12:21,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 78.9) internal successors, (1578), 20 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,616 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,616 INFO L175 Difference]: Start difference. First operand has 192 places, 304 transitions, 4934 flow. Second operand 20 states and 1578 transitions. [2023-01-28 11:12:21,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 352 transitions, 6148 flow [2023-01-28 11:12:21,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 352 transitions, 5949 flow, removed 89 selfloop flow, removed 9 redundant places. [2023-01-28 11:12:21,770 INFO L231 Difference]: Finished difference. Result has 205 places, 313 transitions, 5210 flow [2023-01-28 11:12:21,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4753, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5210, PETRI_PLACES=205, PETRI_TRANSITIONS=313} [2023-01-28 11:12:21,771 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 184 predicate places. [2023-01-28 11:12:21,771 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 313 transitions, 5210 flow [2023-01-28 11:12:21,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:21,772 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 11:12:21,779 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 11:12:21,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 11:12:21,972 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 11:12:21,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:21,973 INFO L85 PathProgramCache]: Analyzing trace with hash -348873531, now seen corresponding path program 6 times [2023-01-28 11:12:21,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:21,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100458041] [2023-01-28 11:12:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:21,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:22,787 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 11:12:22,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:22,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100458041] [2023-01-28 11:12:22,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100458041] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:22,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513061734] [2023-01-28 11:12:22,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:12:22,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:22,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:22,789 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 11:12:22,791 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 11:12:22,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 11:12:22,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:22,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-28 11:12:22,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:23,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:12:23,091 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 11:12:23,301 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 11:12:23,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:23,632 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:23,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 59 [2023-01-28 11:12:23,638 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 46 treesize of output 40 [2023-01-28 11:12:23,916 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 11:12:23,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513061734] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:23,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:23,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 29 [2023-01-28 11:12:23,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884206593] [2023-01-28 11:12:23,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:23,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 11:12:23,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:23,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 11:12:23,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=840, Unknown=2, NotChecked=0, Total=930 [2023-01-28 11:12:23,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 11:12:23,921 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 313 transitions, 5210 flow. Second operand has 31 states, 31 states have (on average 72.64516129032258) internal successors, (2252), 31 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:23,921 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:23,921 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 11:12:23,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:25,856 INFO L130 PetriNetUnfolder]: 854/1652 cut-off events. [2023-01-28 11:12:25,857 INFO L131 PetriNetUnfolder]: For 28566/28566 co-relation queries the response was YES. [2023-01-28 11:12:25,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13376 conditions, 1652 events. 854/1652 cut-off events. For 28566/28566 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 9903 event pairs, 96 based on Foata normal form. 2/1654 useless extension candidates. Maximal degree in co-relation 13301. Up to 894 conditions per place. [2023-01-28 11:12:25,870 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 214 selfloop transitions, 152 changer transitions 6/372 dead transitions. [2023-01-28 11:12:25,870 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 372 transitions, 6564 flow [2023-01-28 11:12:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 11:12:25,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 11:12:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1512 transitions. [2023-01-28 11:12:25,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2789667896678967 [2023-01-28 11:12:25,873 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1512 transitions. [2023-01-28 11:12:25,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1512 transitions. [2023-01-28 11:12:25,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:25,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1512 transitions. [2023-01-28 11:12:25,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 75.6) internal successors, (1512), 20 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:25,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:25,880 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:25,880 INFO L175 Difference]: Start difference. First operand has 205 places, 313 transitions, 5210 flow. Second operand 20 states and 1512 transitions. [2023-01-28 11:12:25,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 372 transitions, 6564 flow [2023-01-28 11:12:26,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 372 transitions, 6467 flow, removed 11 selfloop flow, removed 14 redundant places. [2023-01-28 11:12:26,032 INFO L231 Difference]: Finished difference. Result has 214 places, 327 transitions, 5766 flow [2023-01-28 11:12:26,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5113, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5766, PETRI_PLACES=214, PETRI_TRANSITIONS=327} [2023-01-28 11:12:26,033 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 193 predicate places. [2023-01-28 11:12:26,033 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 327 transitions, 5766 flow [2023-01-28 11:12:26,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 72.64516129032258) internal successors, (2252), 31 states have internal predecessors, (2252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:26,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:26,034 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 11:12:26,042 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 11:12:26,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 11:12:26,240 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 11:12:26,240 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:26,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2032706171, now seen corresponding path program 7 times [2023-01-28 11:12:26,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:26,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909671234] [2023-01-28 11:12:26,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:26,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:27,034 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 11:12:27,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:27,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909671234] [2023-01-28 11:12:27,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909671234] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:27,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107829895] [2023-01-28 11:12:27,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:12:27,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:27,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:27,036 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 11:12:27,039 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 11:12:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:27,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2023-01-28 11:12:27,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:27,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:12:27,317 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 11:12:27,526 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 11:12:27,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:27,758 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:27,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2023-01-28 11:12:27,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-01-28 11:12:28,107 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 11:12:28,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107829895] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:28,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:28,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-01-28 11:12:28,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643476197] [2023-01-28 11:12:28,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:28,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 11:12:28,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:28,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 11:12:28,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2023-01-28 11:12:28,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 11:12:28,110 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 327 transitions, 5766 flow. Second operand has 31 states, 31 states have (on average 72.6774193548387) internal successors, (2253), 31 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:28,110 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:28,110 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 11:12:28,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:30,360 INFO L130 PetriNetUnfolder]: 878/1711 cut-off events. [2023-01-28 11:12:30,360 INFO L131 PetriNetUnfolder]: For 34894/34894 co-relation queries the response was YES. [2023-01-28 11:12:30,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14577 conditions, 1711 events. 878/1711 cut-off events. For 34894/34894 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 10476 event pairs, 67 based on Foata normal form. 2/1713 useless extension candidates. Maximal degree in co-relation 14498. Up to 800 conditions per place. [2023-01-28 11:12:30,376 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 206 selfloop transitions, 174 changer transitions 6/386 dead transitions. [2023-01-28 11:12:30,376 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 386 transitions, 7081 flow [2023-01-28 11:12:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 11:12:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 11:12:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1518 transitions. [2023-01-28 11:12:30,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28007380073800736 [2023-01-28 11:12:30,379 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1518 transitions. [2023-01-28 11:12:30,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1518 transitions. [2023-01-28 11:12:30,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:30,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1518 transitions. [2023-01-28 11:12:30,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 75.9) internal successors, (1518), 20 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:30,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:30,385 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:30,385 INFO L175 Difference]: Start difference. First operand has 214 places, 327 transitions, 5766 flow. Second operand 20 states and 1518 transitions. [2023-01-28 11:12:30,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 386 transitions, 7081 flow [2023-01-28 11:12:30,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 386 transitions, 6850 flow, removed 40 selfloop flow, removed 11 redundant places. [2023-01-28 11:12:30,573 INFO L231 Difference]: Finished difference. Result has 228 places, 334 transitions, 6104 flow [2023-01-28 11:12:30,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5543, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6104, PETRI_PLACES=228, PETRI_TRANSITIONS=334} [2023-01-28 11:12:30,574 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 207 predicate places. [2023-01-28 11:12:30,574 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 334 transitions, 6104 flow [2023-01-28 11:12:30,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 72.6774193548387) internal successors, (2253), 31 states have internal predecessors, (2253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:30,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:30,574 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 11:12:30,582 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 11:12:30,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 11:12:30,780 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 11:12:30,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:30,780 INFO L85 PathProgramCache]: Analyzing trace with hash 40572893, now seen corresponding path program 8 times [2023-01-28 11:12:30,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:30,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257363799] [2023-01-28 11:12:30,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:30,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:31,624 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 11:12:31,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:31,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257363799] [2023-01-28 11:12:31,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257363799] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:31,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714707730] [2023-01-28 11:12:31,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:12:31,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:31,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:31,626 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 11:12:31,628 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 11:12:31,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:12:31,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:31,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-28 11:12:31,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:32,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:12:32,046 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 11:12:32,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-01-28 11:12:32,335 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 11:12:32,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:32,892 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~q_front~0 1))) (or (< .cse0 0) (and (forall ((v_ArrVal_545 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_545) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) c_~N~0)) (= (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296) (mod (+ c_~C~0 c_~x~0) 4294967296))) (<= c_~n~0 .cse0) (< c_~q_back~0 0) (<= c_~n~0 c_~q_back~0) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0))) is different from false [2023-01-28 11:12:32,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:32,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2023-01-28 11:12:32,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-01-28 11:12:33,438 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 11:12:33,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714707730] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:33,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:33,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-28 11:12:33,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477648095] [2023-01-28 11:12:33,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:33,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 11:12:33,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:33,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 11:12:33,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=971, Unknown=1, NotChecked=64, Total=1190 [2023-01-28 11:12:33,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 11:12:33,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 334 transitions, 6104 flow. Second operand has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:33,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:33,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 11:12:33,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:38,346 INFO L130 PetriNetUnfolder]: 1213/2300 cut-off events. [2023-01-28 11:12:38,346 INFO L131 PetriNetUnfolder]: For 61246/61246 co-relation queries the response was YES. [2023-01-28 11:12:38,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21075 conditions, 2300 events. 1213/2300 cut-off events. For 61246/61246 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 14626 event pairs, 80 based on Foata normal form. 4/2304 useless extension candidates. Maximal degree in co-relation 20990. Up to 1349 conditions per place. [2023-01-28 11:12:38,369 INFO L137 encePairwiseOnDemand]: 258/271 looper letters, 262 selfloop transitions, 321 changer transitions 21/604 dead transitions. [2023-01-28 11:12:38,369 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 604 transitions, 11196 flow [2023-01-28 11:12:38,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 11:12:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 11:12:38,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2835 transitions. [2023-01-28 11:12:38,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2827366111498953 [2023-01-28 11:12:38,373 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2835 transitions. [2023-01-28 11:12:38,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2835 transitions. [2023-01-28 11:12:38,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:38,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2835 transitions. [2023-01-28 11:12:38,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 76.62162162162163) internal successors, (2835), 37 states have internal predecessors, (2835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:38,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:38,384 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:38,384 INFO L175 Difference]: Start difference. First operand has 228 places, 334 transitions, 6104 flow. Second operand 37 states and 2835 transitions. [2023-01-28 11:12:38,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 604 transitions, 11196 flow [2023-01-28 11:12:38,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 604 transitions, 10796 flow, removed 58 selfloop flow, removed 12 redundant places. [2023-01-28 11:12:38,659 INFO L231 Difference]: Finished difference. Result has 265 places, 499 transitions, 10002 flow [2023-01-28 11:12:38,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5815, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10002, PETRI_PLACES=265, PETRI_TRANSITIONS=499} [2023-01-28 11:12:38,660 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 244 predicate places. [2023-01-28 11:12:38,660 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 499 transitions, 10002 flow [2023-01-28 11:12:38,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:38,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:38,660 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 11:12:38,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 11:12:38,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:38,861 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 11:12:38,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:38,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1408326089, now seen corresponding path program 9 times [2023-01-28 11:12:38,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:38,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773375317] [2023-01-28 11:12:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:38,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:39,589 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 11:12:39,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:39,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773375317] [2023-01-28 11:12:39,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773375317] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:39,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175556260] [2023-01-28 11:12:39,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:12:39,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:39,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:39,591 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 11:12:39,593 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 11:12:39,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:12:39,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:39,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 67 conjunts are in the unsatisfiable core [2023-01-28 11:12:39,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:12:40,035 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 11:12:40,235 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 11:12:40,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:40,422 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (or (forall ((v_ArrVal_580 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse0) 0)) (= (mod c_~x~0 4294967296) (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296))) (forall ((v_ArrVal_580 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse0))) (or (= .cse1 0) (= .cse1 c_~N~0)))))) is different from false [2023-01-28 11:12:40,549 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:40,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 94 [2023-01-28 11:12:40,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 75 [2023-01-28 11:12:40,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 63 [2023-01-28 11:12:41,098 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 11:12:41,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175556260] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:41,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:41,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-01-28 11:12:41,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531430237] [2023-01-28 11:12:41,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:41,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 11:12:41,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:41,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 11:12:41,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=997, Unknown=1, NotChecked=64, Total=1190 [2023-01-28 11:12:41,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 11:12:41,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 499 transitions, 10002 flow. Second operand has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:41,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:41,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 11:12:41,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:42,392 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (* c_~q_front~0 4) c_~q~0.offset))) (let ((.cse0 (forall ((v_ArrVal_580 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse4) 0))) (.cse1 (mod (+ c_~y~0 (* c_~C~0 2)) 4294967296)) (.cse2 (forall ((v_ArrVal_580 (Array Int Int))) (let ((.cse3 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_580) c_~q~0.base) .cse4))) (or (= .cse3 0) (= .cse3 c_~N~0)))))) (and (or .cse0 (= (mod c_~x~0 4294967296) .cse1)) (or (and (or .cse0 (= .cse1 (mod (+ c_~C~0 c_~x~0) 4294967296))) .cse2) (< c_~q_back~0 0) (<= c_~n~0 c_~q_back~0) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0)) .cse2))) is different from false [2023-01-28 11:12:45,195 INFO L130 PetriNetUnfolder]: 1253/2403 cut-off events. [2023-01-28 11:12:45,195 INFO L131 PetriNetUnfolder]: For 67294/67294 co-relation queries the response was YES. [2023-01-28 11:12:45,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24029 conditions, 2403 events. 1253/2403 cut-off events. For 67294/67294 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 15692 event pairs, 137 based on Foata normal form. 3/2406 useless extension candidates. Maximal degree in co-relation 23931. Up to 1540 conditions per place. [2023-01-28 11:12:45,215 INFO L137 encePairwiseOnDemand]: 257/271 looper letters, 312 selfloop transitions, 282 changer transitions 10/604 dead transitions. [2023-01-28 11:12:45,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 604 transitions, 12362 flow [2023-01-28 11:12:45,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 11:12:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 11:12:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2209 transitions. [2023-01-28 11:12:45,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2810790176867286 [2023-01-28 11:12:45,218 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2209 transitions. [2023-01-28 11:12:45,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2209 transitions. [2023-01-28 11:12:45,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:45,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2209 transitions. [2023-01-28 11:12:45,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 76.17241379310344) internal successors, (2209), 29 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:45,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:45,226 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:45,226 INFO L175 Difference]: Start difference. First operand has 265 places, 499 transitions, 10002 flow. Second operand 29 states and 2209 transitions. [2023-01-28 11:12:45,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 604 transitions, 12362 flow [2023-01-28 11:12:45,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 604 transitions, 11532 flow, removed 371 selfloop flow, removed 18 redundant places. [2023-01-28 11:12:45,505 INFO L231 Difference]: Finished difference. Result has 281 places, 536 transitions, 10710 flow [2023-01-28 11:12:45,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9302, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10710, PETRI_PLACES=281, PETRI_TRANSITIONS=536} [2023-01-28 11:12:45,505 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 260 predicate places. [2023-01-28 11:12:45,505 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 536 transitions, 10710 flow [2023-01-28 11:12:45,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 72.54285714285714) internal successors, (2539), 35 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:45,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:45,506 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 11:12:45,512 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 11:12:45,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:45,711 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 11:12:45,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:45,712 INFO L85 PathProgramCache]: Analyzing trace with hash -710169045, now seen corresponding path program 10 times [2023-01-28 11:12:45,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:45,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899539815] [2023-01-28 11:12:45,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:45,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:46,411 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 11:12:46,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:46,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899539815] [2023-01-28 11:12:46,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899539815] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:46,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837835061] [2023-01-28 11:12:46,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:12:46,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:46,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:46,413 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 11:12:46,414 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 11:12:46,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:12:46,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:46,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-28 11:12:46,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:46,877 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 11:12:46,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:47,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:47,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-01-28 11:12:47,528 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 11:12:47,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837835061] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:47,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:47,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-01-28 11:12:47,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147641821] [2023-01-28 11:12:47,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:47,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 11:12:47,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:47,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 11:12:47,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2023-01-28 11:12:47,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:12:47,533 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 536 transitions, 10710 flow. Second operand has 32 states, 32 states have (on average 76.6875) internal successors, (2454), 32 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:47,533 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:47,533 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:12:47,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:51,023 INFO L130 PetriNetUnfolder]: 1405/2730 cut-off events. [2023-01-28 11:12:51,023 INFO L131 PetriNetUnfolder]: For 65658/65658 co-relation queries the response was YES. [2023-01-28 11:12:51,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27291 conditions, 2730 events. 1405/2730 cut-off events. For 65658/65658 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 18599 event pairs, 114 based on Foata normal form. 3/2733 useless extension candidates. Maximal degree in co-relation 27191. Up to 1137 conditions per place. [2023-01-28 11:12:51,048 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 426 selfloop transitions, 268 changer transitions 15/709 dead transitions. [2023-01-28 11:12:51,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 709 transitions, 14750 flow [2023-01-28 11:12:51,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 11:12:51,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 11:12:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2577 transitions. [2023-01-28 11:12:51,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2971632841328413 [2023-01-28 11:12:51,051 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2577 transitions. [2023-01-28 11:12:51,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2577 transitions. [2023-01-28 11:12:51,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:51,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2577 transitions. [2023-01-28 11:12:51,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 80.53125) internal successors, (2577), 32 states have internal predecessors, (2577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:51,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:51,060 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 271.0) internal successors, (8943), 33 states have internal predecessors, (8943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:51,060 INFO L175 Difference]: Start difference. First operand has 281 places, 536 transitions, 10710 flow. Second operand 32 states and 2577 transitions. [2023-01-28 11:12:51,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 709 transitions, 14750 flow [2023-01-28 11:12:51,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 709 transitions, 14473 flow, removed 106 selfloop flow, removed 13 redundant places. [2023-01-28 11:12:51,399 INFO L231 Difference]: Finished difference. Result has 308 places, 590 transitions, 12576 flow [2023-01-28 11:12:51,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=10480, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12576, PETRI_PLACES=308, PETRI_TRANSITIONS=590} [2023-01-28 11:12:51,400 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 287 predicate places. [2023-01-28 11:12:51,400 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 590 transitions, 12576 flow [2023-01-28 11:12:51,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 76.6875) internal successors, (2454), 32 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:51,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:51,401 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 11:12:51,408 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 11:12:51,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:51,602 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 11:12:51,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:51,603 INFO L85 PathProgramCache]: Analyzing trace with hash -451798573, now seen corresponding path program 11 times [2023-01-28 11:12:51,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:51,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953138930] [2023-01-28 11:12:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:51,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:52,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:12:52,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:52,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953138930] [2023-01-28 11:12:52,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953138930] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:52,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801133982] [2023-01-28 11:12:52,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:12:52,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:52,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:52,132 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 11:12:52,135 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 11:12:52,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:12:52,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 45 conjunts are in the unsatisfiable core [2023-01-28 11:12:52,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:52,473 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 11:12:52,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:52,633 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:52,634 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 53 treesize of output 37 [2023-01-28 11:12:52,907 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 11:12:52,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801133982] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:52,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:52,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-01-28 11:12:52,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032510983] [2023-01-28 11:12:52,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:52,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 11:12:52,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:52,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 11:12:52,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-01-28 11:12:52,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:12:52,910 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 590 transitions, 12576 flow. Second operand has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:52,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:52,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:12:52,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:54,527 INFO L130 PetriNetUnfolder]: 1396/2704 cut-off events. [2023-01-28 11:12:54,527 INFO L131 PetriNetUnfolder]: For 71442/71442 co-relation queries the response was YES. [2023-01-28 11:12:54,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27940 conditions, 2704 events. 1396/2704 cut-off events. For 71442/71442 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18324 event pairs, 137 based on Foata normal form. 2/2706 useless extension candidates. Maximal degree in co-relation 27830. Up to 1275 conditions per place. [2023-01-28 11:12:54,549 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 438 selfloop transitions, 208 changer transitions 14/660 dead transitions. [2023-01-28 11:12:54,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 660 transitions, 15042 flow [2023-01-28 11:12:54,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 11:12:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 11:12:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1819 transitions. [2023-01-28 11:12:54,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29183378790309644 [2023-01-28 11:12:54,553 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1819 transitions. [2023-01-28 11:12:54,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1819 transitions. [2023-01-28 11:12:54,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:54,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1819 transitions. [2023-01-28 11:12:54,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 79.08695652173913) internal successors, (1819), 23 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:54,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:54,560 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:54,560 INFO L175 Difference]: Start difference. First operand has 308 places, 590 transitions, 12576 flow. Second operand 23 states and 1819 transitions. [2023-01-28 11:12:54,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 660 transitions, 15042 flow [2023-01-28 11:12:54,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 660 transitions, 14772 flow, removed 85 selfloop flow, removed 15 redundant places. [2023-01-28 11:12:54,914 INFO L231 Difference]: Finished difference. Result has 313 places, 596 transitions, 12998 flow [2023-01-28 11:12:54,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=12322, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12998, PETRI_PLACES=313, PETRI_TRANSITIONS=596} [2023-01-28 11:12:54,915 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 292 predicate places. [2023-01-28 11:12:54,915 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 596 transitions, 12998 flow [2023-01-28 11:12:54,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.85714285714286) internal successors, (2152), 28 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:54,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:54,916 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 11:12:54,920 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 11:12:55,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-28 11:12:55,116 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 11:12:55,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:55,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1570660874, now seen corresponding path program 12 times [2023-01-28 11:12:55,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:55,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171777872] [2023-01-28 11:12:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:55,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:12:55,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:55,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171777872] [2023-01-28 11:12:55,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171777872] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:55,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697356908] [2023-01-28 11:12:55,188 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:12:55,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:55,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:55,189 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 11:12:55,191 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 11:12:55,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 11:12:55,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:55,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:12:55,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:55,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:12:55,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:55,360 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 11:12:55,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697356908] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:55,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:55,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 10 [2023-01-28 11:12:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613096539] [2023-01-28 11:12:55,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 11:12:55,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 11:12:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2023-01-28 11:12:55,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 271 [2023-01-28 11:12:55,363 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 596 transitions, 12998 flow. Second operand has 11 states, 11 states have (on average 121.63636363636364) internal successors, (1338), 11 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:55,363 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:55,363 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 271 [2023-01-28 11:12:55,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:56,117 INFO L130 PetriNetUnfolder]: 1564/3053 cut-off events. [2023-01-28 11:12:56,117 INFO L131 PetriNetUnfolder]: For 99287/99303 co-relation queries the response was YES. [2023-01-28 11:12:56,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31488 conditions, 3053 events. 1564/3053 cut-off events. For 99287/99303 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21256 event pairs, 167 based on Foata normal form. 124/3174 useless extension candidates. Maximal degree in co-relation 31382. Up to 1321 conditions per place. [2023-01-28 11:12:56,144 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 247 selfloop transitions, 367 changer transitions 100/724 dead transitions. [2023-01-28 11:12:56,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 724 transitions, 16783 flow [2023-01-28 11:12:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:12:56,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:12:56,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 642 transitions. [2023-01-28 11:12:56,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738007380073801 [2023-01-28 11:12:56,146 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 642 transitions. [2023-01-28 11:12:56,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 642 transitions. [2023-01-28 11:12:56,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:56,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 642 transitions. [2023-01-28 11:12:56,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:56,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:56,148 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 271.0) internal successors, (1626), 6 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:56,148 INFO L175 Difference]: Start difference. First operand has 313 places, 596 transitions, 12998 flow. Second operand 5 states and 642 transitions. [2023-01-28 11:12:56,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 724 transitions, 16783 flow [2023-01-28 11:12:56,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 724 transitions, 16362 flow, removed 35 selfloop flow, removed 21 redundant places. [2023-01-28 11:12:56,527 INFO L231 Difference]: Finished difference. Result has 295 places, 594 transitions, 13603 flow [2023-01-28 11:12:56,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=12584, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=289, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=13603, PETRI_PLACES=295, PETRI_TRANSITIONS=594} [2023-01-28 11:12:56,527 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 274 predicate places. [2023-01-28 11:12:56,527 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 594 transitions, 13603 flow [2023-01-28 11:12:56,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 121.63636363636364) internal successors, (1338), 11 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:56,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:56,528 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 11:12:56,533 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 11:12:56,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:56,728 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 11:12:56,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:56,729 INFO L85 PathProgramCache]: Analyzing trace with hash 791885478, now seen corresponding path program 13 times [2023-01-28 11:12:56,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:56,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934570251] [2023-01-28 11:12:56,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:56,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:56,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:56,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:56,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934570251] [2023-01-28 11:12:56,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934570251] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:56,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200686138] [2023-01-28 11:12:56,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:12:56,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:56,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:56,829 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 11:12:56,859 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 11:12:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:56,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:12:56,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:57,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:57,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:57,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200686138] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:57,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:57,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 11:12:57,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855003485] [2023-01-28 11:12:57,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:57,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 11:12:57,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 11:12:57,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-01-28 11:12:57,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 271 [2023-01-28 11:12:57,116 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 594 transitions, 13603 flow. Second operand has 18 states, 18 states have (on average 107.77777777777777) internal successors, (1940), 18 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:57,117 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:57,117 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 271 [2023-01-28 11:12:57,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:57,510 INFO L130 PetriNetUnfolder]: 510/1065 cut-off events. [2023-01-28 11:12:57,511 INFO L131 PetriNetUnfolder]: For 44438/44451 co-relation queries the response was YES. [2023-01-28 11:12:57,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12167 conditions, 1065 events. 510/1065 cut-off events. For 44438/44451 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6152 event pairs, 142 based on Foata normal form. 164/1226 useless extension candidates. Maximal degree in co-relation 12062. Up to 873 conditions per place. [2023-01-28 11:12:57,519 INFO L137 encePairwiseOnDemand]: 266/271 looper letters, 193 selfloop transitions, 4 changer transitions 69/274 dead transitions. [2023-01-28 11:12:57,519 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 274 transitions, 6670 flow [2023-01-28 11:12:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 11:12:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 11:12:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 888 transitions. [2023-01-28 11:12:57,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095940959409594 [2023-01-28 11:12:57,521 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 888 transitions. [2023-01-28 11:12:57,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 888 transitions. [2023-01-28 11:12:57,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:57,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 888 transitions. [2023-01-28 11:12:57,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.0) internal successors, (888), 8 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:57,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:57,527 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 271.0) internal successors, (2439), 9 states have internal predecessors, (2439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:57,527 INFO L175 Difference]: Start difference. First operand has 295 places, 594 transitions, 13603 flow. Second operand 8 states and 888 transitions. [2023-01-28 11:12:57,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 274 transitions, 6670 flow [2023-01-28 11:12:57,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 274 transitions, 5745 flow, removed 243 selfloop flow, removed 46 redundant places. [2023-01-28 11:12:57,649 INFO L231 Difference]: Finished difference. Result has 208 places, 205 transitions, 4097 flow [2023-01-28 11:12:57,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=5155, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4097, PETRI_PLACES=208, PETRI_TRANSITIONS=205} [2023-01-28 11:12:57,649 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 187 predicate places. [2023-01-28 11:12:57,649 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 205 transitions, 4097 flow [2023-01-28 11:12:57,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 107.77777777777777) internal successors, (1940), 18 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:57,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:57,650 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 11:12:57,655 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 11:12:57,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:57,853 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 11:12:57,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:57,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2018294689, now seen corresponding path program 14 times [2023-01-28 11:12:57,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:57,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935033253] [2023-01-28 11:12:57,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:57,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:57,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:58,635 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 11:12:58,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:58,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935033253] [2023-01-28 11:12:58,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935033253] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:58,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470133661] [2023-01-28 11:12:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:12:58,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:58,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:58,636 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 11:12:58,638 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 11:12:58,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:12:58,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:58,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 63 conjunts are in the unsatisfiable core [2023-01-28 11:12:58,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:59,199 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 11:12:59,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:59,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:59,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-01-28 11:13:01,543 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 11:13:01,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470133661] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:01,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:01,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 27 [2023-01-28 11:13:01,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406204553] [2023-01-28 11:13:01,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:01,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 11:13:01,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:01,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 11:13:01,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-01-28 11:13:01,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:13:01,548 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 205 transitions, 4097 flow. Second operand has 29 states, 29 states have (on average 76.89655172413794) internal successors, (2230), 29 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:01,548 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:01,548 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:13:01,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:02,219 INFO L130 PetriNetUnfolder]: 469/921 cut-off events. [2023-01-28 11:13:02,219 INFO L131 PetriNetUnfolder]: For 15913/15913 co-relation queries the response was YES. [2023-01-28 11:13:02,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8447 conditions, 921 events. 469/921 cut-off events. For 15913/15913 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4719 event pairs, 76 based on Foata normal form. 1/921 useless extension candidates. Maximal degree in co-relation 8381. Up to 774 conditions per place. [2023-01-28 11:13:02,225 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 159 selfloop transitions, 52 changer transitions 31/242 dead transitions. [2023-01-28 11:13:02,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 242 transitions, 4842 flow [2023-01-28 11:13:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 11:13:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 11:13:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1500 transitions. [2023-01-28 11:13:02,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2913187026607108 [2023-01-28 11:13:02,226 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1500 transitions. [2023-01-28 11:13:02,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1500 transitions. [2023-01-28 11:13:02,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:02,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1500 transitions. [2023-01-28 11:13:02,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 78.94736842105263) internal successors, (1500), 19 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:02,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:02,231 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 271.0) internal successors, (5420), 20 states have internal predecessors, (5420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:02,231 INFO L175 Difference]: Start difference. First operand has 208 places, 205 transitions, 4097 flow. Second operand 19 states and 1500 transitions. [2023-01-28 11:13:02,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 242 transitions, 4842 flow [2023-01-28 11:13:02,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 242 transitions, 4563 flow, removed 56 selfloop flow, removed 14 redundant places. [2023-01-28 11:13:02,267 INFO L231 Difference]: Finished difference. Result has 175 places, 194 transitions, 3632 flow [2023-01-28 11:13:02,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3853, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3632, PETRI_PLACES=175, PETRI_TRANSITIONS=194} [2023-01-28 11:13:02,268 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 154 predicate places. [2023-01-28 11:13:02,268 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 194 transitions, 3632 flow [2023-01-28 11:13:02,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.89655172413794) internal successors, (2230), 29 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:02,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:02,268 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 11:13:02,276 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 11:13:02,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:02,474 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 11:13:02,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:02,474 INFO L85 PathProgramCache]: Analyzing trace with hash 630323962, now seen corresponding path program 15 times [2023-01-28 11:13:02,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:02,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883348707] [2023-01-28 11:13:02,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:02,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:02,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:02,851 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 11:13:02,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:02,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883348707] [2023-01-28 11:13:02,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883348707] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:02,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216149417] [2023-01-28 11:13:02,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:13:02,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:02,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:02,857 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 11:13:02,882 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 11:13:03,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:13:03,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:03,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 11:13:03,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:03,283 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 11:13:03,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:03,396 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:13:03,396 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 11:13:03,472 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 11:13:03,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216149417] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:03,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:03,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 21 [2023-01-28 11:13:03,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015214709] [2023-01-28 11:13:03,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:03,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 11:13:03,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:03,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 11:13:03,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-01-28 11:13:03,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 271 [2023-01-28 11:13:03,475 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 194 transitions, 3632 flow. Second operand has 22 states, 22 states have (on average 91.36363636363636) internal successors, (2010), 22 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:03,475 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:03,475 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 271 [2023-01-28 11:13:03,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:04,606 INFO L130 PetriNetUnfolder]: 732/1380 cut-off events. [2023-01-28 11:13:04,606 INFO L131 PetriNetUnfolder]: For 22017/22017 co-relation queries the response was YES. [2023-01-28 11:13:04,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11435 conditions, 1380 events. 732/1380 cut-off events. For 22017/22017 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7457 event pairs, 59 based on Foata normal form. 88/1467 useless extension candidates. Maximal degree in co-relation 11373. Up to 413 conditions per place. [2023-01-28 11:13:04,615 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 209 selfloop transitions, 205 changer transitions 1/415 dead transitions. [2023-01-28 11:13:04,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 415 transitions, 6963 flow [2023-01-28 11:13:04,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 11:13:04,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 11:13:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3249 transitions. [2023-01-28 11:13:04,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3526155849793792 [2023-01-28 11:13:04,618 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3249 transitions. [2023-01-28 11:13:04,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3249 transitions. [2023-01-28 11:13:04,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:04,619 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3249 transitions. [2023-01-28 11:13:04,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 95.55882352941177) internal successors, (3249), 34 states have internal predecessors, (3249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:04,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:04,625 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:04,625 INFO L175 Difference]: Start difference. First operand has 175 places, 194 transitions, 3632 flow. Second operand 34 states and 3249 transitions. [2023-01-28 11:13:04,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 415 transitions, 6963 flow [2023-01-28 11:13:04,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 415 transitions, 6651 flow, removed 56 selfloop flow, removed 18 redundant places. [2023-01-28 11:13:04,664 INFO L231 Difference]: Finished difference. Result has 195 places, 278 transitions, 5289 flow [2023-01-28 11:13:04,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=3351, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=5289, PETRI_PLACES=195, PETRI_TRANSITIONS=278} [2023-01-28 11:13:04,665 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 174 predicate places. [2023-01-28 11:13:04,665 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 278 transitions, 5289 flow [2023-01-28 11:13:04,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 91.36363636363636) internal successors, (2010), 22 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:04,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:04,665 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 11:13:04,670 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 11:13:04,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 11:13:04,866 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 11:13:04,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:04,866 INFO L85 PathProgramCache]: Analyzing trace with hash 623757512, now seen corresponding path program 16 times [2023-01-28 11:13:04,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:04,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586072842] [2023-01-28 11:13:04,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:04,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:05,494 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 11:13:05,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:05,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586072842] [2023-01-28 11:13:05,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586072842] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:05,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121347555] [2023-01-28 11:13:05,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:13:05,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:05,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:05,496 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 11:13:05,498 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 11:13:05,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:13:05,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:05,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 11:13:05,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:05,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:13:05,811 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 11:13:05,887 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 11:13:05,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:06,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:06,008 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 11:13:06,011 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 11:13:06,238 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 11:13:06,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121347555] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:06,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:06,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-01-28 11:13:06,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761748725] [2023-01-28 11:13:06,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:06,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 11:13:06,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:06,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 11:13:06,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=850, Unknown=10, NotChecked=0, Total=992 [2023-01-28 11:13:06,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 271 [2023-01-28 11:13:06,241 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 278 transitions, 5289 flow. Second operand has 32 states, 32 states have (on average 91.65625) internal successors, (2933), 32 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:06,242 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:06,242 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 271 [2023-01-28 11:13:06,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:08,976 INFO L130 PetriNetUnfolder]: 1543/2882 cut-off events. [2023-01-28 11:13:08,976 INFO L131 PetriNetUnfolder]: For 54602/54612 co-relation queries the response was YES. [2023-01-28 11:13:08,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26054 conditions, 2882 events. 1543/2882 cut-off events. For 54602/54612 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 18169 event pairs, 153 based on Foata normal form. 104/2981 useless extension candidates. Maximal degree in co-relation 25987. Up to 904 conditions per place. [2023-01-28 11:13:08,998 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 318 selfloop transitions, 373 changer transitions 0/699 dead transitions. [2023-01-28 11:13:08,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 699 transitions, 13405 flow [2023-01-28 11:13:09,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 11:13:09,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 11:13:09,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3651 transitions. [2023-01-28 11:13:09,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3545348611380851 [2023-01-28 11:13:09,004 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3651 transitions. [2023-01-28 11:13:09,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3651 transitions. [2023-01-28 11:13:09,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:09,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3651 transitions. [2023-01-28 11:13:09,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 96.07894736842105) internal successors, (3651), 38 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:09,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 271.0) internal successors, (10569), 39 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:09,015 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 271.0) internal successors, (10569), 39 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:09,015 INFO L175 Difference]: Start difference. First operand has 195 places, 278 transitions, 5289 flow. Second operand 38 states and 3651 transitions. [2023-01-28 11:13:09,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 699 transitions, 13405 flow [2023-01-28 11:13:09,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 699 transitions, 11882 flow, removed 623 selfloop flow, removed 11 redundant places. [2023-01-28 11:13:09,168 INFO L231 Difference]: Finished difference. Result has 236 places, 567 transitions, 11022 flow [2023-01-28 11:13:09,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=4671, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=11022, PETRI_PLACES=236, PETRI_TRANSITIONS=567} [2023-01-28 11:13:09,168 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 215 predicate places. [2023-01-28 11:13:09,168 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 567 transitions, 11022 flow [2023-01-28 11:13:09,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 91.65625) internal successors, (2933), 32 states have internal predecessors, (2933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:09,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:09,169 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 11:13:09,173 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 11:13:09,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 11:13:09,369 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 11:13:09,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:09,369 INFO L85 PathProgramCache]: Analyzing trace with hash -647669827, now seen corresponding path program 17 times [2023-01-28 11:13:09,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:09,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586488506] [2023-01-28 11:13:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:09,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:13:10,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:10,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586488506] [2023-01-28 11:13:10,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586488506] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:10,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813395855] [2023-01-28 11:13:10,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:13:10,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:10,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:10,297 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 11:13:10,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 11:13:10,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:13:10,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:10,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 74 conjunts are in the unsatisfiable core [2023-01-28 11:13:10,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:10,843 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 11:13:10,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:11,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:11,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 70 [2023-01-28 11:13:12,268 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 11:13:12,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813395855] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:12,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:12,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-28 11:13:12,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276798637] [2023-01-28 11:13:12,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:12,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 11:13:12,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:12,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 11:13:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 11:13:12,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:13:12,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 567 transitions, 11022 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:12,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:12,273 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:13:12,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:17,968 INFO L130 PetriNetUnfolder]: 1679/3142 cut-off events. [2023-01-28 11:13:17,968 INFO L131 PetriNetUnfolder]: For 59850/59850 co-relation queries the response was YES. [2023-01-28 11:13:17,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29252 conditions, 3142 events. 1679/3142 cut-off events. For 59850/59850 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 20033 event pairs, 147 based on Foata normal form. 4/3145 useless extension candidates. Maximal degree in co-relation 29170. Up to 1121 conditions per place. [2023-01-28 11:13:17,996 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 418 selfloop transitions, 289 changer transitions 12/719 dead transitions. [2023-01-28 11:13:17,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 719 transitions, 14503 flow [2023-01-28 11:13:17,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 11:13:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 11:13:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2688 transitions. [2023-01-28 11:13:18,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29172997612329066 [2023-01-28 11:13:18,000 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2688 transitions. [2023-01-28 11:13:18,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2688 transitions. [2023-01-28 11:13:18,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:18,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2688 transitions. [2023-01-28 11:13:18,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 79.05882352941177) internal successors, (2688), 34 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:18,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:18,062 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:18,063 INFO L175 Difference]: Start difference. First operand has 236 places, 567 transitions, 11022 flow. Second operand 34 states and 2688 transitions. [2023-01-28 11:13:18,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 719 transitions, 14503 flow [2023-01-28 11:13:18,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 719 transitions, 13065 flow, removed 670 selfloop flow, removed 7 redundant places. [2023-01-28 11:13:18,330 INFO L231 Difference]: Finished difference. Result has 275 places, 633 transitions, 11809 flow [2023-01-28 11:13:18,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=9631, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=11809, PETRI_PLACES=275, PETRI_TRANSITIONS=633} [2023-01-28 11:13:18,331 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 254 predicate places. [2023-01-28 11:13:18,331 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 633 transitions, 11809 flow [2023-01-28 11:13:18,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:18,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:18,332 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 11:13:18,337 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 11:13:18,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 11:13:18,536 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 11:13:18,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash 790216902, now seen corresponding path program 18 times [2023-01-28 11:13:18,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:18,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299232448] [2023-01-28 11:13:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:18,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:18,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:19,129 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 11:13:19,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:19,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299232448] [2023-01-28 11:13:19,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299232448] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:19,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731820115] [2023-01-28 11:13:19,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:13:19,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:19,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:19,133 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 11:13:19,143 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 11:13:19,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:13:19,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:19,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 21 conjunts are in the unsatisfiable core [2023-01-28 11:13:19,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:19,391 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 11:13:19,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:19,428 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 11:13:19,428 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 11:13:19,439 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 11:13:19,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731820115] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:19,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:19,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 5] total 18 [2023-01-28 11:13:19,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231782864] [2023-01-28 11:13:19,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:19,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 11:13:19,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:19,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 11:13:19,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2023-01-28 11:13:19,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 271 [2023-01-28 11:13:19,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 633 transitions, 11809 flow. Second operand has 19 states, 19 states have (on average 96.3157894736842) internal successors, (1830), 19 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:19,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:19,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 271 [2023-01-28 11:13:19,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:20,733 INFO L130 PetriNetUnfolder]: 1842/3434 cut-off events. [2023-01-28 11:13:20,734 INFO L131 PetriNetUnfolder]: For 71837/71859 co-relation queries the response was YES. [2023-01-28 11:13:20,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31316 conditions, 3434 events. 1842/3434 cut-off events. For 71837/71859 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22292 event pairs, 260 based on Foata normal form. 24/3452 useless extension candidates. Maximal degree in co-relation 31221. Up to 1853 conditions per place. [2023-01-28 11:13:20,762 INFO L137 encePairwiseOnDemand]: 263/271 looper letters, 491 selfloop transitions, 321 changer transitions 1/821 dead transitions. [2023-01-28 11:13:20,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 821 transitions, 16642 flow [2023-01-28 11:13:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 11:13:20,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 11:13:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2000 transitions. [2023-01-28 11:13:20,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36900369003690037 [2023-01-28 11:13:20,764 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2000 transitions. [2023-01-28 11:13:20,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2000 transitions. [2023-01-28 11:13:20,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:20,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2000 transitions. [2023-01-28 11:13:20,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 100.0) internal successors, (2000), 20 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:20,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:20,770 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 271.0) internal successors, (5691), 21 states have internal predecessors, (5691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:20,770 INFO L175 Difference]: Start difference. First operand has 275 places, 633 transitions, 11809 flow. Second operand 20 states and 2000 transitions. [2023-01-28 11:13:20,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 821 transitions, 16642 flow [2023-01-28 11:13:21,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 821 transitions, 16115 flow, removed 138 selfloop flow, removed 16 redundant places. [2023-01-28 11:13:21,059 INFO L231 Difference]: Finished difference. Result has 278 places, 692 transitions, 13552 flow [2023-01-28 11:13:21,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=11365, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=13552, PETRI_PLACES=278, PETRI_TRANSITIONS=692} [2023-01-28 11:13:21,060 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 257 predicate places. [2023-01-28 11:13:21,060 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 692 transitions, 13552 flow [2023-01-28 11:13:21,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 96.3157894736842) internal successors, (1830), 19 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:21,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:21,061 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 11:13:21,065 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 11:13:21,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:21,265 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 11:13:21,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:21,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1786705840, now seen corresponding path program 19 times [2023-01-28 11:13:21,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:21,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273115688] [2023-01-28 11:13:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:21,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:21,973 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 11:13:21,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:21,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273115688] [2023-01-28 11:13:21,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273115688] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:21,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598415126] [2023-01-28 11:13:21,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:13:21,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:21,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:21,975 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 11:13:21,978 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 11:13:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:22,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 11:13:22,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:22,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:13:22,285 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 11:13:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:13:22,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:22,368 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_957 (Array Int Int))) (not (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_957) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 0))) is different from false [2023-01-28 11:13:22,379 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:22,380 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 11:13:22,383 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 11:13:22,495 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 11:13:22,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598415126] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:22,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:22,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 29 [2023-01-28 11:13:22,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121902804] [2023-01-28 11:13:22,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:22,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 11:13:22,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:22,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 11:13:22,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=721, Unknown=1, NotChecked=54, Total=870 [2023-01-28 11:13:22,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 271 [2023-01-28 11:13:22,498 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 692 transitions, 13552 flow. Second operand has 30 states, 30 states have (on average 82.86666666666666) internal successors, (2486), 30 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:22,498 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:22,498 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 271 [2023-01-28 11:13:22,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:24,456 INFO L130 PetriNetUnfolder]: 1998/3723 cut-off events. [2023-01-28 11:13:24,456 INFO L131 PetriNetUnfolder]: For 75260/75260 co-relation queries the response was YES. [2023-01-28 11:13:24,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34114 conditions, 3723 events. 1998/3723 cut-off events. For 75260/75260 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 24698 event pairs, 101 based on Foata normal form. 44/3766 useless extension candidates. Maximal degree in co-relation 34019. Up to 1057 conditions per place. [2023-01-28 11:13:24,489 INFO L137 encePairwiseOnDemand]: 262/271 looper letters, 332 selfloop transitions, 525 changer transitions 1/858 dead transitions. [2023-01-28 11:13:24,489 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 858 transitions, 17664 flow [2023-01-28 11:13:24,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 11:13:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 11:13:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2489 transitions. [2023-01-28 11:13:24,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31670696017305 [2023-01-28 11:13:24,493 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2489 transitions. [2023-01-28 11:13:24,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2489 transitions. [2023-01-28 11:13:24,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:24,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2489 transitions. [2023-01-28 11:13:24,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 85.82758620689656) internal successors, (2489), 29 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:24,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:24,501 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:24,501 INFO L175 Difference]: Start difference. First operand has 278 places, 692 transitions, 13552 flow. Second operand 29 states and 2489 transitions. [2023-01-28 11:13:24,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 858 transitions, 17664 flow [2023-01-28 11:13:24,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 858 transitions, 17631 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-01-28 11:13:24,902 INFO L231 Difference]: Finished difference. Result has 304 places, 744 transitions, 16024 flow [2023-01-28 11:13:24,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=13519, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=479, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=16024, PETRI_PLACES=304, PETRI_TRANSITIONS=744} [2023-01-28 11:13:24,903 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 283 predicate places. [2023-01-28 11:13:24,903 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 744 transitions, 16024 flow [2023-01-28 11:13:24,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 82.86666666666666) internal successors, (2486), 30 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:24,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:24,904 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 11:13:24,913 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 11:13:25,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:25,109 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 11:13:25,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash 752855597, now seen corresponding path program 20 times [2023-01-28 11:13:25,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:25,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928047008] [2023-01-28 11:13:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:25,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:25,980 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 11:13:25,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:25,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928047008] [2023-01-28 11:13:25,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928047008] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:25,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978218280] [2023-01-28 11:13:25,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:13:25,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:25,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:25,982 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 11:13:25,984 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 11:13:26,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:13:26,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:26,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 76 conjunts are in the unsatisfiable core [2023-01-28 11:13:26,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:26,735 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-01-28 11:13:26,735 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 11:13:26,831 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 11:13:26,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:27,306 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 11:13:27,306 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 89 treesize of output 75 [2023-01-28 11:13:28,040 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 11:13:28,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978218280] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:28,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:28,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-01-28 11:13:28,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674274146] [2023-01-28 11:13:28,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:28,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 11:13:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:28,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 11:13:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1427, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 11:13:28,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:13:28,044 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 744 transitions, 16024 flow. Second operand has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:28,044 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:28,044 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:13:28,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:31,972 INFO L130 PetriNetUnfolder]: 2245/4186 cut-off events. [2023-01-28 11:13:31,972 INFO L131 PetriNetUnfolder]: For 99693/99693 co-relation queries the response was YES. [2023-01-28 11:13:31,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40855 conditions, 4186 events. 2245/4186 cut-off events. For 99693/99693 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 28429 event pairs, 385 based on Foata normal form. 2/4188 useless extension candidates. Maximal degree in co-relation 40755. Up to 1867 conditions per place. [2023-01-28 11:13:32,007 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 564 selfloop transitions, 351 changer transitions 11/926 dead transitions. [2023-01-28 11:13:32,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 926 transitions, 20947 flow [2023-01-28 11:13:32,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 11:13:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 11:13:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1854 transitions. [2023-01-28 11:13:32,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29744906144713623 [2023-01-28 11:13:32,009 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1854 transitions. [2023-01-28 11:13:32,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1854 transitions. [2023-01-28 11:13:32,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:32,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1854 transitions. [2023-01-28 11:13:32,012 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 80.6086956521739) internal successors, (1854), 23 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:32,015 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:32,016 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 271.0) internal successors, (6504), 24 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:32,016 INFO L175 Difference]: Start difference. First operand has 304 places, 744 transitions, 16024 flow. Second operand 23 states and 1854 transitions. [2023-01-28 11:13:32,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 926 transitions, 20947 flow [2023-01-28 11:13:32,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 926 transitions, 20195 flow, removed 152 selfloop flow, removed 16 redundant places. [2023-01-28 11:13:32,521 INFO L231 Difference]: Finished difference. Result has 321 places, 831 transitions, 18821 flow [2023-01-28 11:13:32,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=15319, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=18821, PETRI_PLACES=321, PETRI_TRANSITIONS=831} [2023-01-28 11:13:32,523 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 300 predicate places. [2023-01-28 11:13:32,523 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 831 transitions, 18821 flow [2023-01-28 11:13:32,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:32,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:32,523 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 11:13:32,531 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 11:13:32,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-01-28 11:13:32,729 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 11:13:32,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:32,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1567382327, now seen corresponding path program 21 times [2023-01-28 11:13:32,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:32,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698333472] [2023-01-28 11:13:32,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:32,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:32,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:33,489 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 11:13:33,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:33,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698333472] [2023-01-28 11:13:33,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698333472] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:33,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101099913] [2023-01-28 11:13:33,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:13:33,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:33,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:33,491 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 11:13:33,492 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 11:13:33,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:13:33,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:33,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 70 conjunts are in the unsatisfiable core [2023-01-28 11:13:33,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:34,022 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:34,022 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 25 treesize of output 7 [2023-01-28 11:13:34,109 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 11:13:34,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:34,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:34,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 78 [2023-01-28 11:13:34,791 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 11:13:34,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101099913] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:34,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:34,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2023-01-28 11:13:34,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567990337] [2023-01-28 11:13:34,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:34,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 11:13:34,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:34,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 11:13:34,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 11:13:34,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:13:34,795 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 831 transitions, 18821 flow. Second operand has 33 states, 33 states have (on average 76.78787878787878) internal successors, (2534), 33 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:34,795 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:34,795 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:13:34,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:42,543 INFO L130 PetriNetUnfolder]: 2400/4509 cut-off events. [2023-01-28 11:13:42,544 INFO L131 PetriNetUnfolder]: For 113817/113817 co-relation queries the response was YES. [2023-01-28 11:13:42,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45837 conditions, 4509 events. 2400/4509 cut-off events. For 113817/113817 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 31498 event pairs, 314 based on Foata normal form. 3/4511 useless extension candidates. Maximal degree in co-relation 45728. Up to 3565 conditions per place. [2023-01-28 11:13:42,585 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 676 selfloop transitions, 307 changer transitions 13/996 dead transitions. [2023-01-28 11:13:42,585 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 996 transitions, 23238 flow [2023-01-28 11:13:42,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 11:13:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 11:13:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2962 transitions. [2023-01-28 11:13:42,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2954024134835943 [2023-01-28 11:13:42,588 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2962 transitions. [2023-01-28 11:13:42,588 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2962 transitions. [2023-01-28 11:13:42,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:42,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2962 transitions. [2023-01-28 11:13:42,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 80.05405405405405) internal successors, (2962), 37 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:42,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:42,598 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:42,598 INFO L175 Difference]: Start difference. First operand has 321 places, 831 transitions, 18821 flow. Second operand 37 states and 2962 transitions. [2023-01-28 11:13:42,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 996 transitions, 23238 flow [2023-01-28 11:13:43,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 996 transitions, 22902 flow, removed 140 selfloop flow, removed 10 redundant places. [2023-01-28 11:13:43,336 INFO L231 Difference]: Finished difference. Result has 357 places, 894 transitions, 20945 flow [2023-01-28 11:13:43,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=18525, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=20945, PETRI_PLACES=357, PETRI_TRANSITIONS=894} [2023-01-28 11:13:43,337 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 336 predicate places. [2023-01-28 11:13:43,337 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 894 transitions, 20945 flow [2023-01-28 11:13:43,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 76.78787878787878) internal successors, (2534), 33 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:43,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:43,338 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 11:13:43,348 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 11:13:43,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-28 11:13:43,543 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 11:13:43,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1204047719, now seen corresponding path program 22 times [2023-01-28 11:13:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:43,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961697060] [2023-01-28 11:13:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:44,473 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 11:13:44,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:44,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961697060] [2023-01-28 11:13:44,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961697060] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:44,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012011353] [2023-01-28 11:13:44,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:13:44,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:44,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:44,474 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 11:13:44,476 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 11:13:44,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:13:44,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:44,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 68 conjunts are in the unsatisfiable core [2023-01-28 11:13:44,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:45,037 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 11:13:45,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:45,419 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:45,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 75 [2023-01-28 11:13:45,613 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 11:13:45,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012011353] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:45,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:45,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-01-28 11:13:45,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312661891] [2023-01-28 11:13:45,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:45,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 11:13:45,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:45,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 11:13:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1078, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 11:13:45,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:13:45,617 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 894 transitions, 20945 flow. Second operand has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:45,617 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:45,617 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:13:45,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:47,970 INFO L130 PetriNetUnfolder]: 2447/4596 cut-off events. [2023-01-28 11:13:47,970 INFO L131 PetriNetUnfolder]: For 119816/119816 co-relation queries the response was YES. [2023-01-28 11:13:47,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47800 conditions, 4596 events. 2447/4596 cut-off events. For 119816/119816 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 32208 event pairs, 433 based on Foata normal form. 2/4597 useless extension candidates. Maximal degree in co-relation 47680. Up to 4061 conditions per place. [2023-01-28 11:13:48,015 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 766 selfloop transitions, 195 changer transitions 24/985 dead transitions. [2023-01-28 11:13:48,016 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 985 transitions, 24223 flow [2023-01-28 11:13:48,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 11:13:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 11:13:48,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2153 transitions. [2023-01-28 11:13:48,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2942462757960913 [2023-01-28 11:13:48,019 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2153 transitions. [2023-01-28 11:13:48,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2153 transitions. [2023-01-28 11:13:48,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:48,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2153 transitions. [2023-01-28 11:13:48,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 79.74074074074075) internal successors, (2153), 27 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:48,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:48,025 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:48,025 INFO L175 Difference]: Start difference. First operand has 357 places, 894 transitions, 20945 flow. Second operand 27 states and 2153 transitions. [2023-01-28 11:13:48,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 985 transitions, 24223 flow [2023-01-28 11:13:48,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 985 transitions, 23613 flow, removed 128 selfloop flow, removed 16 redundant places. [2023-01-28 11:13:48,680 INFO L231 Difference]: Finished difference. Result has 375 places, 917 transitions, 21457 flow [2023-01-28 11:13:48,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=20369, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=894, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=710, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=21457, PETRI_PLACES=375, PETRI_TRANSITIONS=917} [2023-01-28 11:13:48,681 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 354 predicate places. [2023-01-28 11:13:48,681 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 917 transitions, 21457 flow [2023-01-28 11:13:48,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:48,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:48,682 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 11:13:48,691 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 11:13:48,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:48,885 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 11:13:48,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:48,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1919810157, now seen corresponding path program 23 times [2023-01-28 11:13:48,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:48,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688174281] [2023-01-28 11:13:48,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:48,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:48,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:49,764 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 11:13:49,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:49,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688174281] [2023-01-28 11:13:49,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688174281] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:49,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334608703] [2023-01-28 11:13:49,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:13:49,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:49,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:49,766 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 11:13:49,767 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 11:13:49,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:13:49,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:49,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 74 conjunts are in the unsatisfiable core [2023-01-28 11:13:49,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:50,375 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 11:13:50,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:50,799 INFO L321 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-01-28 11:13:50,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 68 [2023-01-28 11:13:51,023 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 11:13:51,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334608703] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:51,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:51,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-01-28 11:13:51,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794360532] [2023-01-28 11:13:51,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:51,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 11:13:51,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:51,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 11:13:51,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 11:13:51,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:13:51,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 917 transitions, 21457 flow. Second operand has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:51,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:51,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:13:51,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:55,175 INFO L130 PetriNetUnfolder]: 2464/4617 cut-off events. [2023-01-28 11:13:55,175 INFO L131 PetriNetUnfolder]: For 120911/120911 co-relation queries the response was YES. [2023-01-28 11:13:55,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47949 conditions, 4617 events. 2464/4617 cut-off events. For 120911/120911 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 32085 event pairs, 385 based on Foata normal form. 2/4618 useless extension candidates. Maximal degree in co-relation 47822. Up to 4031 conditions per place. [2023-01-28 11:13:55,220 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 722 selfloop transitions, 242 changer transitions 18/982 dead transitions. [2023-01-28 11:13:55,220 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 982 transitions, 24244 flow [2023-01-28 11:13:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 11:13:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 11:13:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2144 transitions. [2023-01-28 11:13:55,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29301626349596827 [2023-01-28 11:13:55,223 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2144 transitions. [2023-01-28 11:13:55,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2144 transitions. [2023-01-28 11:13:55,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:55,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2144 transitions. [2023-01-28 11:13:55,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 79.4074074074074) internal successors, (2144), 27 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:55,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:55,228 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 271.0) internal successors, (7588), 28 states have internal predecessors, (7588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:55,228 INFO L175 Difference]: Start difference. First operand has 375 places, 917 transitions, 21457 flow. Second operand 27 states and 2144 transitions. [2023-01-28 11:13:55,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 982 transitions, 24244 flow [2023-01-28 11:13:55,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 982 transitions, 23957 flow, removed 36 selfloop flow, removed 19 redundant places. [2023-01-28 11:13:55,908 INFO L231 Difference]: Finished difference. Result has 382 places, 931 transitions, 22152 flow [2023-01-28 11:13:55,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=21174, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=917, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=677, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=22152, PETRI_PLACES=382, PETRI_TRANSITIONS=931} [2023-01-28 11:13:55,908 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 361 predicate places. [2023-01-28 11:13:55,909 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 931 transitions, 22152 flow [2023-01-28 11:13:55,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:55,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:55,909 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 11:13:55,914 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 11:13:56,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:56,109 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 11:13:56,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash -873840017, now seen corresponding path program 24 times [2023-01-28 11:13:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:56,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354989] [2023-01-28 11:13:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:56,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:57,042 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 11:13:57,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:57,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354989] [2023-01-28 11:13:57,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354989] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:57,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655269806] [2023-01-28 11:13:57,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:13:57,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:57,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:57,044 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 11:13:57,045 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 11:13:57,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:13:57,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:57,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 78 conjunts are in the unsatisfiable core [2023-01-28 11:13:57,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:57,655 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:13:57,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:13:57,658 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:13:57,662 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:57,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 18 [2023-01-28 11:13:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:13:57,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:58,106 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:58,107 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 98 treesize of output 83 [2023-01-28 11:13:58,588 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 11:13:58,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655269806] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:58,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:58,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2023-01-28 11:13:58,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669371153] [2023-01-28 11:13:58,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:58,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-01-28 11:13:58,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-01-28 11:13:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2023-01-28 11:13:58,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:13:58,592 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 931 transitions, 22152 flow. Second operand has 36 states, 36 states have (on average 76.47222222222223) internal successors, (2753), 36 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:58,593 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:58,593 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:13:58,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:14:03,290 INFO L130 PetriNetUnfolder]: 2716/5071 cut-off events. [2023-01-28 11:14:03,290 INFO L131 PetriNetUnfolder]: For 135286/135286 co-relation queries the response was YES. [2023-01-28 11:14:03,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53489 conditions, 5071 events. 2716/5071 cut-off events. For 135286/135286 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 36223 event pairs, 315 based on Foata normal form. 3/5073 useless extension candidates. Maximal degree in co-relation 53362. Up to 4206 conditions per place. [2023-01-28 11:14:03,337 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 805 selfloop transitions, 316 changer transitions 12/1133 dead transitions. [2023-01-28 11:14:03,337 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 1133 transitions, 28154 flow [2023-01-28 11:14:03,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 11:14:03,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 11:14:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2248 transitions. [2023-01-28 11:14:03,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2962572482867686 [2023-01-28 11:14:03,340 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2248 transitions. [2023-01-28 11:14:03,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2248 transitions. [2023-01-28 11:14:03,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:14:03,341 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2248 transitions. [2023-01-28 11:14:03,342 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 80.28571428571429) internal successors, (2248), 28 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:03,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:03,346 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 271.0) internal successors, (7859), 29 states have internal predecessors, (7859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:03,347 INFO L175 Difference]: Start difference. First operand has 382 places, 931 transitions, 22152 flow. Second operand 28 states and 2248 transitions. [2023-01-28 11:14:03,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 1133 transitions, 28154 flow [2023-01-28 11:14:04,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1133 transitions, 27716 flow, removed 46 selfloop flow, removed 22 redundant places. [2023-01-28 11:14:04,271 INFO L231 Difference]: Finished difference. Result has 395 places, 1043 transitions, 25839 flow [2023-01-28 11:14:04,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=21739, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=25839, PETRI_PLACES=395, PETRI_TRANSITIONS=1043} [2023-01-28 11:14:04,272 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 374 predicate places. [2023-01-28 11:14:04,272 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 1043 transitions, 25839 flow [2023-01-28 11:14:04,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 76.47222222222223) internal successors, (2753), 36 states have internal predecessors, (2753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:04,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:14:04,273 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 11:14:04,277 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 11:14:04,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:14:04,473 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 11:14:04,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:14:04,474 INFO L85 PathProgramCache]: Analyzing trace with hash -146005971, now seen corresponding path program 25 times [2023-01-28 11:14:04,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:14:04,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119217913] [2023-01-28 11:14:04,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:14:04,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:14:04,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:14:05,215 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 11:14:05,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:14:05,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119217913] [2023-01-28 11:14:05,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119217913] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:14:05,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989200877] [2023-01-28 11:14:05,216 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:14:05,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:14:05,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:14:05,221 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 11:14:05,223 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 11:14:05,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:14:05,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 81 conjunts are in the unsatisfiable core [2023-01-28 11:14:05,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:14:05,930 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 11:14:05,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:14:06,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:14:06,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 66 [2023-01-28 11:14:06,906 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 11:14:06,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989200877] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:14:06,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:14:06,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-01-28 11:14:06,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186612113] [2023-01-28 11:14:06,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:14:06,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 11:14:06,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:14:06,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 11:14:06,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 11:14:06,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:14:06,911 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 1043 transitions, 25839 flow. Second operand has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:06,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:14:06,911 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:14:06,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:14:17,651 INFO L130 PetriNetUnfolder]: 2848/5340 cut-off events. [2023-01-28 11:14:17,651 INFO L131 PetriNetUnfolder]: For 149820/149820 co-relation queries the response was YES. [2023-01-28 11:14:17,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57569 conditions, 5340 events. 2848/5340 cut-off events. For 149820/149820 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 38836 event pairs, 179 based on Foata normal form. 4/5343 useless extension candidates. Maximal degree in co-relation 57436. Up to 1561 conditions per place. [2023-01-28 11:14:17,706 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 540 selfloop transitions, 645 changer transitions 26/1211 dead transitions. [2023-01-28 11:14:17,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 1211 transitions, 30703 flow [2023-01-28 11:14:17,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 11:14:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 11:14:17,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3042 transitions. [2023-01-28 11:14:17,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2953971644979608 [2023-01-28 11:14:17,711 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3042 transitions. [2023-01-28 11:14:17,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3042 transitions. [2023-01-28 11:14:17,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:14:17,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3042 transitions. [2023-01-28 11:14:17,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 80.05263157894737) internal successors, (3042), 38 states have internal predecessors, (3042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:17,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 271.0) internal successors, (10569), 39 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:17,720 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 271.0) internal successors, (10569), 39 states have internal predecessors, (10569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:17,721 INFO L175 Difference]: Start difference. First operand has 395 places, 1043 transitions, 25839 flow. Second operand 38 states and 3042 transitions. [2023-01-28 11:14:17,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 1211 transitions, 30703 flow [2023-01-28 11:14:18,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 1211 transitions, 30374 flow, removed 122 selfloop flow, removed 11 redundant places. [2023-01-28 11:14:18,773 INFO L231 Difference]: Finished difference. Result has 430 places, 1095 transitions, 28370 flow [2023-01-28 11:14:18,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=25550, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=593, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=28370, PETRI_PLACES=430, PETRI_TRANSITIONS=1095} [2023-01-28 11:14:18,774 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 409 predicate places. [2023-01-28 11:14:18,774 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 1095 transitions, 28370 flow [2023-01-28 11:14:18,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:18,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:14:18,775 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 11:14:18,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-01-28 11:14:18,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-28 11:14:18,980 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 11:14:18,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:14:18,980 INFO L85 PathProgramCache]: Analyzing trace with hash 293114543, now seen corresponding path program 26 times [2023-01-28 11:14:18,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:14:18,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800769711] [2023-01-28 11:14:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:14:18,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:14:18,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:14:19,692 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 11:14:19,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:14:19,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800769711] [2023-01-28 11:14:19,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800769711] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:14:19,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503025718] [2023-01-28 11:14:19,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:14:19,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:14:19,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:14:19,694 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 11:14:19,695 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 11:14:19,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:14:19,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:14:19,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 11:14:19,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:14:20,294 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 11:14:20,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:14:20,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:14:20,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 66 [2023-01-28 11:14:20,946 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 11:14:20,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503025718] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:14:20,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:14:20,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-28 11:14:20,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485087930] [2023-01-28 11:14:20,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:14:20,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 11:14:20,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:14:20,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 11:14:20,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 11:14:20,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:14:20,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 1095 transitions, 28370 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:20,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:14:20,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:14:20,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:14:25,020 INFO L130 PetriNetUnfolder]: 2823/5291 cut-off events. [2023-01-28 11:14:25,020 INFO L131 PetriNetUnfolder]: For 161365/161365 co-relation queries the response was YES. [2023-01-28 11:14:25,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59212 conditions, 5291 events. 2823/5291 cut-off events. For 161365/161365 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 38340 event pairs, 325 based on Foata normal form. 2/5292 useless extension candidates. Maximal degree in co-relation 59070. Up to 1710 conditions per place. [2023-01-28 11:14:25,074 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 594 selfloop transitions, 551 changer transitions 18/1163 dead transitions. [2023-01-28 11:14:25,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 1163 transitions, 31419 flow [2023-01-28 11:14:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 11:14:25,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 11:14:25,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2454 transitions. [2023-01-28 11:14:25,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29210808237114627 [2023-01-28 11:14:25,079 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2454 transitions. [2023-01-28 11:14:25,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2454 transitions. [2023-01-28 11:14:25,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:14:25,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2454 transitions. [2023-01-28 11:14:25,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 79.16129032258064) internal successors, (2454), 31 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:25,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:25,087 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:25,087 INFO L175 Difference]: Start difference. First operand has 430 places, 1095 transitions, 28370 flow. Second operand 31 states and 2454 transitions. [2023-01-28 11:14:25,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 1163 transitions, 31419 flow [2023-01-28 11:14:26,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 1163 transitions, 30645 flow, removed 98 selfloop flow, removed 17 redundant places. [2023-01-28 11:14:26,178 INFO L231 Difference]: Finished difference. Result has 441 places, 1095 transitions, 28690 flow [2023-01-28 11:14:26,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=27613, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=550, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=28690, PETRI_PLACES=441, PETRI_TRANSITIONS=1095} [2023-01-28 11:14:26,179 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 420 predicate places. [2023-01-28 11:14:26,179 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1095 transitions, 28690 flow [2023-01-28 11:14:26,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:26,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:14:26,179 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 11:14:26,184 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 11:14:26,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-28 11:14:26,380 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 11:14:26,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:14:26,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1782724047, now seen corresponding path program 27 times [2023-01-28 11:14:26,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:14:26,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892403421] [2023-01-28 11:14:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:14:26,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:14:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:14:27,501 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 11:14:27,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:14:27,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892403421] [2023-01-28 11:14:27,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892403421] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:14:27,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986378731] [2023-01-28 11:14:27,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:14:27,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:14:27,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:14:27,503 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 11:14:27,504 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 11:14:27,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:14:27,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:14:27,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 71 conjunts are in the unsatisfiable core [2023-01-28 11:14:27,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:14:27,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:14:27,874 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 11:14:28,191 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 11:14:28,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:14:28,601 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse8 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse8 c_~q~0.offset 4)) (.cse3 (+ c_~q~0.offset (* 4 c_~q_back~0))) (.cse4 (+ .cse8 c_~q~0.offset))) (and (forall ((v_ArrVal_1262 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1262) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse4))) (or (< (+ .cse0 (select .cse1 .cse2)) (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|)) (not (= (select .cse1 .cse3) 1)) (= .cse0 0))))) (forall ((v_ArrVal_1262 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1262) c_~q~0.base))) (let ((.cse6 (select .cse5 .cse4))) (or (not (= (select .cse5 .cse3) 1)) (< |c_thread1Thread1of1ForFork0_~i~0#1| (+ .cse6 (select .cse5 .cse2))) (= .cse6 0))))) (or (forall ((v_ArrVal_1262 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1262) c_~q~0.base))) (or (not (= (select .cse7 .cse3) 1)) (= (select .cse7 .cse4) 0)))) (= (mod (+ c_~y~0 (* c_~C~0 3)) 4294967296) (mod (+ (* c_~C~0 2) c_~x~0) 4294967296)))))) is different from false [2023-01-28 11:14:28,639 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:14:28,640 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 327 treesize of output 270 [2023-01-28 11:14:28,653 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:14:28,654 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 229 treesize of output 227 [2023-01-28 11:14:28,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:14:28,667 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 216 treesize of output 209 [2023-01-28 11:14:28,681 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:14:28,681 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 190 treesize of output 183 [2023-01-28 11:14:29,531 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 11:14:29,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986378731] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:14:29,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:14:29,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 36 [2023-01-28 11:14:29,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339665094] [2023-01-28 11:14:29,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:14:29,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 11:14:29,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:14:29,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 11:14:29,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1222, Unknown=1, NotChecked=70, Total=1406 [2023-01-28 11:14:29,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 11:14:29,534 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1095 transitions, 28690 flow. Second operand has 38 states, 38 states have (on average 72.55263157894737) internal successors, (2757), 38 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:29,534 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:14:29,534 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 11:14:29,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:14:33,004 INFO L130 PetriNetUnfolder]: 2879/5419 cut-off events. [2023-01-28 11:14:33,005 INFO L131 PetriNetUnfolder]: For 173909/173909 co-relation queries the response was YES. [2023-01-28 11:14:33,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61065 conditions, 5419 events. 2879/5419 cut-off events. For 173909/173909 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 39441 event pairs, 405 based on Foata normal form. 2/5421 useless extension candidates. Maximal degree in co-relation 60924. Up to 4501 conditions per place. [2023-01-28 11:14:33,063 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 891 selfloop transitions, 283 changer transitions 6/1180 dead transitions. [2023-01-28 11:14:33,063 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1180 transitions, 32034 flow [2023-01-28 11:14:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-01-28 11:14:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-01-28 11:14:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1896 transitions. [2023-01-28 11:14:33,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27985239852398525 [2023-01-28 11:14:33,065 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1896 transitions. [2023-01-28 11:14:33,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1896 transitions. [2023-01-28 11:14:33,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:14:33,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1896 transitions. [2023-01-28 11:14:33,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 75.84) internal successors, (1896), 25 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:33,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 271.0) internal successors, (7046), 26 states have internal predecessors, (7046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:33,070 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 271.0) internal successors, (7046), 26 states have internal predecessors, (7046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:33,070 INFO L175 Difference]: Start difference. First operand has 441 places, 1095 transitions, 28690 flow. Second operand 25 states and 1896 transitions. [2023-01-28 11:14:33,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1180 transitions, 32034 flow [2023-01-28 11:14:34,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1180 transitions, 31517 flow, removed 6 selfloop flow, removed 20 redundant places. [2023-01-28 11:14:34,201 INFO L231 Difference]: Finished difference. Result has 452 places, 1113 transitions, 29344 flow [2023-01-28 11:14:34,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=28175, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=29344, PETRI_PLACES=452, PETRI_TRANSITIONS=1113} [2023-01-28 11:14:34,202 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 431 predicate places. [2023-01-28 11:14:34,202 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 1113 transitions, 29344 flow [2023-01-28 11:14:34,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 72.55263157894737) internal successors, (2757), 38 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:34,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:14:34,203 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 11:14:34,211 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 11:14:34,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-01-28 11:14:34,408 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 11:14:34,409 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:14:34,409 INFO L85 PathProgramCache]: Analyzing trace with hash 79078061, now seen corresponding path program 28 times [2023-01-28 11:14:34,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:14:34,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420549413] [2023-01-28 11:14:34,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:14:34,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:14:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:14:35,135 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 11:14:35,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:14:35,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420549413] [2023-01-28 11:14:35,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420549413] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:14:35,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867837143] [2023-01-28 11:14:35,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:14:35,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:14:35,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:14:35,137 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 11:14:35,139 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 11:14:35,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:14:35,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:14:35,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-01-28 11:14:35,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:14:35,906 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 11:14:35,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:14:36,387 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:14:36,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 66 [2023-01-28 11:14:36,897 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 11:14:36,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867837143] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:14:36,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:14:36,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-01-28 11:14:36,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738930955] [2023-01-28 11:14:36,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:14:36,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 11:14:36,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:14:36,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 11:14:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 11:14:36,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:14:36,900 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 1113 transitions, 29344 flow. Second operand has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:36,900 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:14:36,900 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:14:36,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:14:48,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:14:51,816 INFO L130 PetriNetUnfolder]: 3203/6077 cut-off events. [2023-01-28 11:14:51,816 INFO L131 PetriNetUnfolder]: For 191098/191098 co-relation queries the response was YES. [2023-01-28 11:14:51,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69057 conditions, 6077 events. 3203/6077 cut-off events. For 191098/191098 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 45856 event pairs, 164 based on Foata normal form. 11/6087 useless extension candidates. Maximal degree in co-relation 68907. Up to 1714 conditions per place. [2023-01-28 11:14:51,881 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 537 selfloop transitions, 814 changer transitions 35/1386 dead transitions. [2023-01-28 11:14:51,881 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 1386 transitions, 37290 flow [2023-01-28 11:14:51,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-01-28 11:14:51,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-01-28 11:14:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3752 transitions. [2023-01-28 11:14:51,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29457486064222344 [2023-01-28 11:14:51,884 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3752 transitions. [2023-01-28 11:14:51,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3752 transitions. [2023-01-28 11:14:51,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:14:51,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3752 transitions. [2023-01-28 11:14:51,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 79.82978723404256) internal successors, (3752), 47 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:51,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 271.0) internal successors, (13008), 48 states have internal predecessors, (13008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:51,892 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 271.0) internal successors, (13008), 48 states have internal predecessors, (13008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:51,892 INFO L175 Difference]: Start difference. First operand has 452 places, 1113 transitions, 29344 flow. Second operand 47 states and 3752 transitions. [2023-01-28 11:14:51,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 1386 transitions, 37290 flow [2023-01-28 11:14:53,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 1386 transitions, 36866 flow, removed 71 selfloop flow, removed 14 redundant places. [2023-01-28 11:14:53,362 INFO L231 Difference]: Finished difference. Result has 497 places, 1253 transitions, 35263 flow [2023-01-28 11:14:53,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=28952, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=681, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=35263, PETRI_PLACES=497, PETRI_TRANSITIONS=1253} [2023-01-28 11:14:53,363 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 476 predicate places. [2023-01-28 11:14:53,363 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1253 transitions, 35263 flow [2023-01-28 11:14:53,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:53,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:14:53,364 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 11:14:53,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-01-28 11:14:53,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-01-28 11:14:53,565 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 11:14:53,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:14:53,565 INFO L85 PathProgramCache]: Analyzing trace with hash 466362235, now seen corresponding path program 29 times [2023-01-28 11:14:53,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:14:53,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141439480] [2023-01-28 11:14:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:14:53,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:14:53,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:14:54,412 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 11:14:54,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:14:54,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141439480] [2023-01-28 11:14:54,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141439480] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:14:54,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320842690] [2023-01-28 11:14:54,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:14:54,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:14:54,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:14:54,414 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 11:14:54,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 11:14:54,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:14:54,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:14:54,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 74 conjunts are in the unsatisfiable core [2023-01-28 11:14:54,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:14:54,962 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 11:14:54,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:14:55,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:14:55,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 69 [2023-01-28 11:14:55,694 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 11:14:55,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320842690] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:14:55,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:14:55,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-28 11:14:55,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028784639] [2023-01-28 11:14:55,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:14:55,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 11:14:55,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:14:55,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 11:14:55,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 11:14:55,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:14:55,698 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1253 transitions, 35263 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:55,698 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:14:55,698 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:14:55,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:15:03,338 INFO L130 PetriNetUnfolder]: 3223/6136 cut-off events. [2023-01-28 11:15:03,338 INFO L131 PetriNetUnfolder]: For 224081/224081 co-relation queries the response was YES. [2023-01-28 11:15:03,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73607 conditions, 6136 events. 3223/6136 cut-off events. For 224081/224081 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 46432 event pairs, 184 based on Foata normal form. 14/6149 useless extension candidates. Maximal degree in co-relation 73444. Up to 1804 conditions per place. [2023-01-28 11:15:03,408 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 603 selfloop transitions, 740 changer transitions 44/1387 dead transitions. [2023-01-28 11:15:03,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 1387 transitions, 39947 flow [2023-01-28 11:15:03,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-01-28 11:15:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-01-28 11:15:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 3798 transitions. [2023-01-28 11:15:03,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29197416974169743 [2023-01-28 11:15:03,412 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 3798 transitions. [2023-01-28 11:15:03,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 3798 transitions. [2023-01-28 11:15:03,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:15:03,413 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 3798 transitions. [2023-01-28 11:15:03,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 79.125) internal successors, (3798), 48 states have internal predecessors, (3798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:03,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 271.0) internal successors, (13279), 49 states have internal predecessors, (13279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:03,424 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 271.0) internal successors, (13279), 49 states have internal predecessors, (13279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:03,424 INFO L175 Difference]: Start difference. First operand has 497 places, 1253 transitions, 35263 flow. Second operand 48 states and 3798 transitions. [2023-01-28 11:15:03,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 1387 transitions, 39947 flow [2023-01-28 11:15:05,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 1387 transitions, 39090 flow, removed 345 selfloop flow, removed 26 redundant places. [2023-01-28 11:15:05,851 INFO L231 Difference]: Finished difference. Result has 523 places, 1269 transitions, 36673 flow [2023-01-28 11:15:05,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=34464, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=717, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=36673, PETRI_PLACES=523, PETRI_TRANSITIONS=1269} [2023-01-28 11:15:05,851 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 502 predicate places. [2023-01-28 11:15:05,852 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 1269 transitions, 36673 flow [2023-01-28 11:15:05,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:05,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:15:05,852 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:15:05,857 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 11:15:06,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-01-28 11:15:06,052 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:15:06,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:15:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash 810806975, now seen corresponding path program 30 times [2023-01-28 11:15:06,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:15:06,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623740772] [2023-01-28 11:15:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:15:06,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:15:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:15:06,719 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 11:15:06,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:15:06,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623740772] [2023-01-28 11:15:06,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623740772] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:15:06,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015095079] [2023-01-28 11:15:06,720 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:15:06,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:15:06,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:15:06,721 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 11:15:06,723 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 11:15:07,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:15:07,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:15:07,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 84 conjunts are in the unsatisfiable core [2023-01-28 11:15:07,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:15:07,541 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:15:07,543 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:15:07,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 19 [2023-01-28 11:15:07,644 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 11:15:07,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:15:08,087 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 11:15:08,087 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 103 treesize of output 80 [2023-01-28 11:15:08,909 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 11:15:08,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015095079] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:15:08,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:15:08,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2023-01-28 11:15:08,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081719034] [2023-01-28 11:15:08,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:15:08,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 11:15:08,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:15:08,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 11:15:08,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1204, Unknown=0, NotChecked=0, Total=1406 [2023-01-28 11:15:08,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:15:08,913 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 1269 transitions, 36673 flow. Second operand has 38 states, 38 states have (on average 76.5) internal successors, (2907), 38 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:08,913 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:15:08,913 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:15:08,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:15:23,394 INFO L130 PetriNetUnfolder]: 3773/7099 cut-off events. [2023-01-28 11:15:23,395 INFO L131 PetriNetUnfolder]: For 281460/281460 co-relation queries the response was YES. [2023-01-28 11:15:23,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87062 conditions, 7099 events. 3773/7099 cut-off events. For 281460/281460 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 54452 event pairs, 496 based on Foata normal form. 5/7104 useless extension candidates. Maximal degree in co-relation 86895. Up to 2347 conditions per place. [2023-01-28 11:15:23,478 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 707 selfloop transitions, 910 changer transitions 30/1647 dead transitions. [2023-01-28 11:15:23,478 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1647 transitions, 48273 flow [2023-01-28 11:15:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 11:15:23,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 11:15:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2887 transitions. [2023-01-28 11:15:23,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29592045920459203 [2023-01-28 11:15:23,481 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2887 transitions. [2023-01-28 11:15:23,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2887 transitions. [2023-01-28 11:15:23,482 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:15:23,482 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2887 transitions. [2023-01-28 11:15:23,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 80.19444444444444) internal successors, (2887), 36 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:23,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:23,487 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:23,487 INFO L175 Difference]: Start difference. First operand has 523 places, 1269 transitions, 36673 flow. Second operand 36 states and 2887 transitions. [2023-01-28 11:15:23,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1647 transitions, 48273 flow [2023-01-28 11:15:26,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 1647 transitions, 47751 flow, removed 134 selfloop flow, removed 26 redundant places. [2023-01-28 11:15:26,741 INFO L231 Difference]: Finished difference. Result has 539 places, 1520 transitions, 46749 flow [2023-01-28 11:15:26,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=36195, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=672, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=46749, PETRI_PLACES=539, PETRI_TRANSITIONS=1520} [2023-01-28 11:15:26,742 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 518 predicate places. [2023-01-28 11:15:26,742 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 1520 transitions, 46749 flow [2023-01-28 11:15:26,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 76.5) internal successors, (2907), 38 states have internal predecessors, (2907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:26,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:15:26,742 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 11:15:26,747 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 11:15:26,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:15:26,943 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:15:26,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:15:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1405158061, now seen corresponding path program 31 times [2023-01-28 11:15:26,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:15:26,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305846844] [2023-01-28 11:15:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:15:26,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:15:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:15:27,722 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 11:15:27,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:15:27,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305846844] [2023-01-28 11:15:27,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305846844] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:15:27,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073298226] [2023-01-28 11:15:27,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:15:27,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:15:27,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:15:27,724 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 11:15:27,725 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 11:15:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:15:27,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 92 conjunts are in the unsatisfiable core [2023-01-28 11:15:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:15:27,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 11:15:27,969 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 11:15:28,017 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 11:15:28,061 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 11:15:28,372 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:15:28,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 7 [2023-01-28 11:15:28,509 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 11:15:28,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:15:29,630 INFO L321 Elim1Store]: treesize reduction 48, result has 64.7 percent of original size [2023-01-28 11:15:29,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 388 treesize of output 313 [2023-01-28 11:15:29,641 INFO L167 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:15:29,643 INFO L172 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 229 [2023-01-28 11:15:29,649 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 514 treesize of output 495 [2023-01-28 11:15:29,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 479 treesize of output 453 [2023-01-28 11:15:29,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 453 treesize of output 440 [2023-01-28 11:15:29,684 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:15:29,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 456 treesize of output 455 [2023-01-28 11:15:29,713 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:15:29,713 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 427 treesize of output 412 [2023-01-28 11:15:29,745 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:15:29,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 375 treesize of output 386 [2023-01-28 11:15:29,799 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:15:29,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 365 treesize of output 405 [2023-01-28 11:15:29,809 INFO L208 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-01-28 11:15:29,860 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:15:29,861 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 523 treesize of output 553 [2023-01-28 11:15:29,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:15:29,924 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 471 treesize of output 456 [2023-01-28 11:15:29,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:15:29,990 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 419 treesize of output 430 [2023-01-28 11:16:03,724 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 11:16:03,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073298226] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:16:03,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:16:03,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-01-28 11:16:03,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265237856] [2023-01-28 11:16:03,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:16:03,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-01-28 11:16:03,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:16:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-01-28 11:16:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1540, Unknown=2, NotChecked=0, Total=1806 [2023-01-28 11:16:03,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 11:16:03,728 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 1520 transitions, 46749 flow. Second operand has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:03,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:16:03,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 11:16:03,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:16:08,439 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:16:34,251 INFO L130 PetriNetUnfolder]: 4541/8497 cut-off events. [2023-01-28 11:16:34,252 INFO L131 PetriNetUnfolder]: For 403607/403607 co-relation queries the response was YES. [2023-01-28 11:16:34,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110419 conditions, 8497 events. 4541/8497 cut-off events. For 403607/403607 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 65668 event pairs, 313 based on Foata normal form. 257/8753 useless extension candidates. Maximal degree in co-relation 110241. Up to 4636 conditions per place. [2023-01-28 11:16:34,377 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 989 selfloop transitions, 930 changer transitions 119/2038 dead transitions. [2023-01-28 11:16:34,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 2038 transitions, 62773 flow [2023-01-28 11:16:34,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-28 11:16:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-28 11:16:34,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4378 transitions. [2023-01-28 11:16:34,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.269249692496925 [2023-01-28 11:16:34,383 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4378 transitions. [2023-01-28 11:16:34,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4378 transitions. [2023-01-28 11:16:34,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:16:34,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4378 transitions. [2023-01-28 11:16:34,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 72.96666666666667) internal successors, (4378), 60 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:34,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 271.0) internal successors, (16531), 61 states have internal predecessors, (16531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:34,398 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 271.0) internal successors, (16531), 61 states have internal predecessors, (16531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:34,398 INFO L175 Difference]: Start difference. First operand has 539 places, 1520 transitions, 46749 flow. Second operand 60 states and 4378 transitions. [2023-01-28 11:16:34,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 2038 transitions, 62773 flow [2023-01-28 11:16:39,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 2038 transitions, 60973 flow, removed 863 selfloop flow, removed 19 redundant places. [2023-01-28 11:16:39,985 INFO L231 Difference]: Finished difference. Result has 603 places, 1746 transitions, 55433 flow [2023-01-28 11:16:39,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=44535, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=691, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=55433, PETRI_PLACES=603, PETRI_TRANSITIONS=1746} [2023-01-28 11:16:39,986 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 582 predicate places. [2023-01-28 11:16:39,986 INFO L495 AbstractCegarLoop]: Abstraction has has 603 places, 1746 transitions, 55433 flow [2023-01-28 11:16:39,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 69.46511627906976) internal successors, (2987), 43 states have internal predecessors, (2987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:39,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:16:39,986 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 11:16:39,991 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 11:16:40,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:16:40,190 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:16:40,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:16:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1578405753, now seen corresponding path program 32 times [2023-01-28 11:16:40,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:16:40,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221825246] [2023-01-28 11:16:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:16:40,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:16:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:16:41,484 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 11:16:41,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:16:41,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221825246] [2023-01-28 11:16:41,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221825246] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:16:41,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192205269] [2023-01-28 11:16:41,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:16:41,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:16:41,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:16:41,486 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 11:16:41,489 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 11:16:41,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:16:41,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:16:41,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 83 conjunts are in the unsatisfiable core [2023-01-28 11:16:41,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:16:42,146 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:16:42,146 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 11:16:42,306 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 11:16:42,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:16:42,720 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:16:42,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 67 [2023-01-28 11:16:43,327 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 11:16:43,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192205269] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:16:43,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:16:43,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-01-28 11:16:43,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100223801] [2023-01-28 11:16:43,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:16:43,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 11:16:43,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:16:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 11:16:43,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 11:16:43,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 11:16:43,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 603 places, 1746 transitions, 55433 flow. Second operand has 42 states, 42 states have (on average 69.5) internal successors, (2919), 42 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:43,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:16:43,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 11:16:43,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:16:58,173 INFO L130 PetriNetUnfolder]: 4798/9117 cut-off events. [2023-01-28 11:16:58,173 INFO L131 PetriNetUnfolder]: For 449642/449642 co-relation queries the response was YES. [2023-01-28 11:16:58,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121747 conditions, 9117 events. 4798/9117 cut-off events. For 449642/449642 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 72791 event pairs, 269 based on Foata normal form. 46/9160 useless extension candidates. Maximal degree in co-relation 121545. Up to 2424 conditions per place. [2023-01-28 11:16:58,296 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 707 selfloop transitions, 1292 changer transitions 125/2124 dead transitions. [2023-01-28 11:16:58,296 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 652 places, 2124 transitions, 68037 flow [2023-01-28 11:16:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-01-28 11:16:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-01-28 11:16:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 4153 transitions. [2023-01-28 11:16:58,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.268854793811096 [2023-01-28 11:16:58,300 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 4153 transitions. [2023-01-28 11:16:58,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 4153 transitions. [2023-01-28 11:16:58,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:16:58,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 4153 transitions. [2023-01-28 11:16:58,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 72.85964912280701) internal successors, (4153), 57 states have internal predecessors, (4153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:58,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 271.0) internal successors, (15718), 58 states have internal predecessors, (15718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:58,310 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 271.0) internal successors, (15718), 58 states have internal predecessors, (15718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:58,310 INFO L175 Difference]: Start difference. First operand has 603 places, 1746 transitions, 55433 flow. Second operand 57 states and 4153 transitions. [2023-01-28 11:16:58,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 652 places, 2124 transitions, 68037 flow [2023-01-28 11:17:05,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 626 places, 2124 transitions, 65471 flow, removed 1050 selfloop flow, removed 26 redundant places. [2023-01-28 11:17:05,430 INFO L231 Difference]: Finished difference. Result has 644 places, 1845 transitions, 60752 flow [2023-01-28 11:17:05,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=53107, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=60752, PETRI_PLACES=644, PETRI_TRANSITIONS=1845} [2023-01-28 11:17:05,432 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 623 predicate places. [2023-01-28 11:17:05,432 INFO L495 AbstractCegarLoop]: Abstraction has has 644 places, 1845 transitions, 60752 flow [2023-01-28 11:17:05,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 69.5) internal successors, (2919), 42 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:05,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:17:05,433 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:17:05,444 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 11:17:05,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:17:05,638 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:17:05,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:17:05,639 INFO L85 PathProgramCache]: Analyzing trace with hash 966037547, now seen corresponding path program 33 times [2023-01-28 11:17:05,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:17:05,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659116549] [2023-01-28 11:17:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:17:05,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:17:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:17:06,608 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 11:17:06,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:17:06,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659116549] [2023-01-28 11:17:06,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659116549] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:17:06,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580197985] [2023-01-28 11:17:06,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:17:06,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:17:06,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:17:06,610 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:17:06,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-01-28 11:17:06,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:17:06,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:17:06,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 64 conjunts are in the unsatisfiable core [2023-01-28 11:17:06,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:17:07,199 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 11:17:07,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:17:07,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:17:07,542 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 103 treesize of output 80 [2023-01-28 11:17:07,806 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 11:17:07,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580197985] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:17:07,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:17:07,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 31 [2023-01-28 11:17:07,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728203771] [2023-01-28 11:17:07,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:17:07,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 11:17:07,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:17:07,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 11:17:07,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 11:17:07,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:17:07,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 644 places, 1845 transitions, 60752 flow. Second operand has 33 states, 33 states have (on average 76.78787878787878) internal successors, (2534), 33 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:07,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:17:07,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:17:07,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:17:14,414 INFO L130 PetriNetUnfolder]: 4489/8498 cut-off events. [2023-01-28 11:17:14,414 INFO L131 PetriNetUnfolder]: For 440816/440816 co-relation queries the response was YES. [2023-01-28 11:17:14,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116642 conditions, 8498 events. 4489/8498 cut-off events. For 440816/440816 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 66811 event pairs, 877 based on Foata normal form. 4/8501 useless extension candidates. Maximal degree in co-relation 116429. Up to 8117 conditions per place. [2023-01-28 11:17:14,548 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 1733 selfloop transitions, 138 changer transitions 45/1916 dead transitions. [2023-01-28 11:17:14,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 665 places, 1916 transitions, 65449 flow [2023-01-28 11:17:14,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 11:17:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 11:17:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2446 transitions. [2023-01-28 11:17:14,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2911558147839543 [2023-01-28 11:17:14,551 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2446 transitions. [2023-01-28 11:17:14,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2446 transitions. [2023-01-28 11:17:14,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:17:14,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2446 transitions. [2023-01-28 11:17:14,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 78.90322580645162) internal successors, (2446), 31 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:14,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:14,557 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:14,557 INFO L175 Difference]: Start difference. First operand has 644 places, 1845 transitions, 60752 flow. Second operand 31 states and 2446 transitions. [2023-01-28 11:17:14,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 665 places, 1916 transitions, 65449 flow [2023-01-28 11:17:21,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 626 places, 1916 transitions, 63510 flow, removed 351 selfloop flow, removed 39 redundant places. [2023-01-28 11:17:21,362 INFO L231 Difference]: Finished difference. Result has 634 places, 1841 transitions, 58846 flow [2023-01-28 11:17:21,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=58834, PETRI_DIFFERENCE_MINUEND_PLACES=596, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1845, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=58846, PETRI_PLACES=634, PETRI_TRANSITIONS=1841} [2023-01-28 11:17:21,363 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 613 predicate places. [2023-01-28 11:17:21,363 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 1841 transitions, 58846 flow [2023-01-28 11:17:21,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 76.78787878787878) internal successors, (2534), 33 states have internal predecessors, (2534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:21,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:17:21,364 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 11:17:21,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-01-28 11:17:21,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-01-28 11:17:21,564 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:17:21,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:17:21,564 INFO L85 PathProgramCache]: Analyzing trace with hash -764727611, now seen corresponding path program 34 times [2023-01-28 11:17:21,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:17:21,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200554852] [2023-01-28 11:17:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:17:21,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:17:21,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:17:22,461 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 11:17:22,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:17:22,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200554852] [2023-01-28 11:17:22,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200554852] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:17:22,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995157118] [2023-01-28 11:17:22,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:17:22,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:17:22,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:17:22,463 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:17:22,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-01-28 11:17:22,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:17:22,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:17:22,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 11:17:22,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:17:23,165 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 11:17:23,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:17:23,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:17:23,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 67 [2023-01-28 11:17:23,858 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 11:17:23,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995157118] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:17:23,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:17:23,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-28 11:17:23,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260080491] [2023-01-28 11:17:23,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:17:23,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 11:17:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:17:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 11:17:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 11:17:23,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:17:23,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 1841 transitions, 58846 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:23,861 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:17:23,861 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:17:23,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:17:32,459 INFO L130 PetriNetUnfolder]: 4530/8581 cut-off events. [2023-01-28 11:17:32,460 INFO L131 PetriNetUnfolder]: For 405669/405669 co-relation queries the response was YES. [2023-01-28 11:17:32,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114413 conditions, 8581 events. 4530/8581 cut-off events. For 405669/405669 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 67961 event pairs, 280 based on Foata normal form. 4/8578 useless extension candidates. Maximal degree in co-relation 114208. Up to 3705 conditions per place. [2023-01-28 11:17:32,575 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1219 selfloop transitions, 754 changer transitions 19/1992 dead transitions. [2023-01-28 11:17:32,575 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 660 places, 1992 transitions, 65666 flow [2023-01-28 11:17:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 11:17:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 11:17:32,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2778 transitions. [2023-01-28 11:17:32,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29288350026357407 [2023-01-28 11:17:32,578 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2778 transitions. [2023-01-28 11:17:32,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2778 transitions. [2023-01-28 11:17:32,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:17:32,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2778 transitions. [2023-01-28 11:17:32,580 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 79.37142857142857) internal successors, (2778), 35 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:32,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 271.0) internal successors, (9756), 36 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:32,583 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 271.0) internal successors, (9756), 36 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:32,584 INFO L175 Difference]: Start difference. First operand has 634 places, 1841 transitions, 58846 flow. Second operand 35 states and 2778 transitions. [2023-01-28 11:17:32,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 660 places, 1992 transitions, 65666 flow [2023-01-28 11:17:39,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 636 places, 1992 transitions, 65336 flow, removed 54 selfloop flow, removed 24 redundant places. [2023-01-28 11:17:39,254 INFO L231 Difference]: Finished difference. Result has 645 places, 1881 transitions, 61600 flow [2023-01-28 11:17:39,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=58542, PETRI_DIFFERENCE_MINUEND_PLACES=602, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1841, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=716, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=61600, PETRI_PLACES=645, PETRI_TRANSITIONS=1881} [2023-01-28 11:17:39,256 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 624 predicate places. [2023-01-28 11:17:39,256 INFO L495 AbstractCegarLoop]: Abstraction has has 645 places, 1881 transitions, 61600 flow [2023-01-28 11:17:39,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:39,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:17:39,257 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 11:17:39,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-01-28 11:17:39,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-01-28 11:17:39,463 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:17:39,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:17:39,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1938992087, now seen corresponding path program 35 times [2023-01-28 11:17:39,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:17:39,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305632368] [2023-01-28 11:17:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:17:39,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:17:39,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:17:40,279 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 11:17:40,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:17:40,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305632368] [2023-01-28 11:17:40,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305632368] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:17:40,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693924384] [2023-01-28 11:17:40,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:17:40,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:17:40,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:17:40,280 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:17:40,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-01-28 11:17:40,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:17:40,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:17:40,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 11:17:40,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:17:40,952 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 11:17:40,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:17:41,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:17:41,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 67 [2023-01-28 11:17:41,722 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 11:17:41,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693924384] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:17:41,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:17:41,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 35 [2023-01-28 11:17:41,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932648670] [2023-01-28 11:17:41,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:17:41,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 11:17:41,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:17:41,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 11:17:41,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1217, Unknown=0, NotChecked=0, Total=1332 [2023-01-28 11:17:41,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:17:41,725 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 645 places, 1881 transitions, 61600 flow. Second operand has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:41,725 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:17:41,725 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:17:41,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:17:50,276 INFO L130 PetriNetUnfolder]: 4548/8635 cut-off events. [2023-01-28 11:17:50,277 INFO L131 PetriNetUnfolder]: For 431309/431309 co-relation queries the response was YES. [2023-01-28 11:17:50,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117113 conditions, 8635 events. 4548/8635 cut-off events. For 431309/431309 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 68739 event pairs, 249 based on Foata normal form. 4/8633 useless extension candidates. Maximal degree in co-relation 116905. Up to 3694 conditions per place. [2023-01-28 11:17:50,396 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1187 selfloop transitions, 748 changer transitions 47/1982 dead transitions. [2023-01-28 11:17:50,396 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 677 places, 1982 transitions, 67066 flow [2023-01-28 11:17:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 11:17:50,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 11:17:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2772 transitions. [2023-01-28 11:17:50,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2922509225092251 [2023-01-28 11:17:50,399 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2772 transitions. [2023-01-28 11:17:50,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2772 transitions. [2023-01-28 11:17:50,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:17:50,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2772 transitions. [2023-01-28 11:17:50,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 79.2) internal successors, (2772), 35 states have internal predecessors, (2772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:50,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 271.0) internal successors, (9756), 36 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:50,406 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 271.0) internal successors, (9756), 36 states have internal predecessors, (9756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:50,406 INFO L175 Difference]: Start difference. First operand has 645 places, 1881 transitions, 61600 flow. Second operand 35 states and 2772 transitions. [2023-01-28 11:17:50,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 677 places, 1982 transitions, 67066 flow [2023-01-28 11:17:56,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 660 places, 1982 transitions, 65696 flow, removed 147 selfloop flow, removed 17 redundant places. [2023-01-28 11:17:56,674 INFO L231 Difference]: Finished difference. Result has 666 places, 1881 transitions, 61661 flow [2023-01-28 11:17:56,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=60246, PETRI_DIFFERENCE_MINUEND_PLACES=626, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=744, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=61661, PETRI_PLACES=666, PETRI_TRANSITIONS=1881} [2023-01-28 11:17:56,676 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 645 predicate places. [2023-01-28 11:17:56,676 INFO L495 AbstractCegarLoop]: Abstraction has has 666 places, 1881 transitions, 61661 flow [2023-01-28 11:17:56,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.64864864864865) internal successors, (2836), 37 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:56,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:17:56,676 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 11:17:56,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-01-28 11:17:56,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-01-28 11:17:56,877 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:17:56,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:17:56,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1499871573, now seen corresponding path program 36 times [2023-01-28 11:17:56,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:17:56,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812615899] [2023-01-28 11:17:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:17:56,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:17:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:17:57,750 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 11:17:57,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:17:57,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812615899] [2023-01-28 11:17:57,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812615899] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:17:57,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255229795] [2023-01-28 11:17:57,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:17:57,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:17:57,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:17:57,752 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:17:57,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-01-28 11:17:57,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:17:57,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:17:57,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 74 conjunts are in the unsatisfiable core [2023-01-28 11:17:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:17:58,354 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 11:17:58,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:17:58,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:17:58,751 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 104 treesize of output 80 [2023-01-28 11:17:59,035 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 11:17:59,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255229795] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:17:59,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:17:59,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 9] total 33 [2023-01-28 11:17:59,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550610644] [2023-01-28 11:17:59,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:17:59,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 11:17:59,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:17:59,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 11:17:59,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 11:17:59,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:17:59,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 666 places, 1881 transitions, 61661 flow. Second operand has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:59,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:17:59,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:17:59,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:18:05,831 INFO L130 PetriNetUnfolder]: 4540/8608 cut-off events. [2023-01-28 11:18:05,832 INFO L131 PetriNetUnfolder]: For 438769/438769 co-relation queries the response was YES. [2023-01-28 11:18:05,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116536 conditions, 8608 events. 4540/8608 cut-off events. For 438769/438769 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 67930 event pairs, 877 based on Foata normal form. 3/8605 useless extension candidates. Maximal degree in co-relation 116326. Up to 7949 conditions per place. [2023-01-28 11:18:05,954 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 1623 selfloop transitions, 297 changer transitions 27/1947 dead transitions. [2023-01-28 11:18:05,954 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 686 places, 1947 transitions, 66426 flow [2023-01-28 11:18:05,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 11:18:05,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 11:18:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2300 transitions. [2023-01-28 11:18:05,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29265809899478307 [2023-01-28 11:18:05,956 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2300 transitions. [2023-01-28 11:18:05,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2300 transitions. [2023-01-28 11:18:05,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:18:05,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2300 transitions. [2023-01-28 11:18:05,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 79.3103448275862) internal successors, (2300), 29 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:05,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:05,961 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 271.0) internal successors, (8130), 30 states have internal predecessors, (8130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:05,961 INFO L175 Difference]: Start difference. First operand has 666 places, 1881 transitions, 61661 flow. Second operand 29 states and 2300 transitions. [2023-01-28 11:18:05,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 686 places, 1947 transitions, 66426 flow [2023-01-28 11:18:12,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 656 places, 1947 transitions, 64847 flow, removed 37 selfloop flow, removed 30 redundant places. [2023-01-28 11:18:12,259 INFO L231 Difference]: Finished difference. Result has 664 places, 1891 transitions, 61030 flow [2023-01-28 11:18:12,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=60096, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=61030, PETRI_PLACES=664, PETRI_TRANSITIONS=1891} [2023-01-28 11:18:12,260 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 643 predicate places. [2023-01-28 11:18:12,260 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1891 transitions, 61030 flow [2023-01-28 11:18:12,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.74285714285715) internal successors, (2686), 35 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:12,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:18:12,261 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 11:18:12,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-01-28 11:18:12,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-01-28 11:18:12,461 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:18:12,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:18:12,462 INFO L85 PathProgramCache]: Analyzing trace with hash 136354127, now seen corresponding path program 37 times [2023-01-28 11:18:12,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:18:12,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426949484] [2023-01-28 11:18:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:18:12,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:18:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:18:13,355 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 11:18:13,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:18:13,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426949484] [2023-01-28 11:18:13,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426949484] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:18:13,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375735310] [2023-01-28 11:18:13,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:18:13,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:18:13,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:18:13,357 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:18:13,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-01-28 11:18:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:18:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-01-28 11:18:13,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:18:14,069 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-01-28 11:18:14,070 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 15 [2023-01-28 11:18:14,167 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 11:18:14,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:18:14,787 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 11:18:14,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 67 [2023-01-28 11:18:15,674 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 11:18:15,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375735310] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:18:15,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:18:15,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-01-28 11:18:15,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100912280] [2023-01-28 11:18:15,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:18:15,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-01-28 11:18:15,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:18:15,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-01-28 11:18:15,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1471, Unknown=0, NotChecked=0, Total=1640 [2023-01-28 11:18:15,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 271 [2023-01-28 11:18:15,678 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1891 transitions, 61030 flow. Second operand has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:15,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:18:15,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 271 [2023-01-28 11:18:15,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:18:28,724 WARN L222 SmtUtils]: Spent 6.82s on a formula simplification. DAG size of input: 86 DAG size of output: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:18:38,170 INFO L130 PetriNetUnfolder]: 4776/9064 cut-off events. [2023-01-28 11:18:38,170 INFO L131 PetriNetUnfolder]: For 430499/430499 co-relation queries the response was YES. [2023-01-28 11:18:38,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120251 conditions, 9064 events. 4776/9064 cut-off events. For 430499/430499 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 72698 event pairs, 392 based on Foata normal form. 3/9060 useless extension candidates. Maximal degree in co-relation 120040. Up to 2436 conditions per place. [2023-01-28 11:18:38,303 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1218 selfloop transitions, 894 changer transitions 28/2140 dead transitions. [2023-01-28 11:18:38,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 695 places, 2140 transitions, 70513 flow [2023-01-28 11:18:38,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 11:18:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 11:18:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2971 transitions. [2023-01-28 11:18:38,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2962999900269273 [2023-01-28 11:18:38,308 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2971 transitions. [2023-01-28 11:18:38,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2971 transitions. [2023-01-28 11:18:38,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:18:38,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2971 transitions. [2023-01-28 11:18:38,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 80.29729729729729) internal successors, (2971), 37 states have internal predecessors, (2971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:38,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:38,316 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 271.0) internal successors, (10298), 38 states have internal predecessors, (10298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:38,317 INFO L175 Difference]: Start difference. First operand has 664 places, 1891 transitions, 61030 flow. Second operand 37 states and 2971 transitions. [2023-01-28 11:18:38,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 695 places, 2140 transitions, 70513 flow [2023-01-28 11:18:44,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 673 places, 2140 transitions, 69875 flow, removed 83 selfloop flow, removed 22 redundant places. [2023-01-28 11:18:44,920 INFO L231 Difference]: Finished difference. Result has 684 places, 1995 transitions, 66548 flow [2023-01-28 11:18:44,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=60424, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=66548, PETRI_PLACES=684, PETRI_TRANSITIONS=1995} [2023-01-28 11:18:44,921 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 663 predicate places. [2023-01-28 11:18:44,921 INFO L495 AbstractCegarLoop]: Abstraction has has 684 places, 1995 transitions, 66548 flow [2023-01-28 11:18:44,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 76.53658536585365) internal successors, (3138), 41 states have internal predecessors, (3138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:44,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:18:44,922 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 11:18:44,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-01-28 11:18:45,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:18:45,123 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:18:45,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:18:45,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1899490793, now seen corresponding path program 38 times [2023-01-28 11:18:45,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:18:45,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022492329] [2023-01-28 11:18:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:18:45,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:18:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:18:45,950 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 11:18:45,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:18:45,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022492329] [2023-01-28 11:18:45,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022492329] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:18:45,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208395043] [2023-01-28 11:18:45,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:18:45,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:18:45,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:18:45,952 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:18:45,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-01-28 11:18:46,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:18:46,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:18:46,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 81 conjunts are in the unsatisfiable core [2023-01-28 11:18:46,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:18:46,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:18:46,298 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 11:18:46,696 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 11:18:46,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:18:47,348 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:18:47,349 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 341 treesize of output 281 [2023-01-28 11:18:47,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:18:47,362 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 240 treesize of output 235 [2023-01-28 11:18:47,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:18:47,376 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 226 treesize of output 218 [2023-01-28 11:18:47,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:18:47,392 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 199 treesize of output 191 [2023-01-28 11:18:48,330 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 11:18:48,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208395043] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:18:48,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:18:48,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 37 [2023-01-28 11:18:48,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378002820] [2023-01-28 11:18:48,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:18:48,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 11:18:48,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:18:48,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 11:18:48,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1364, Unknown=1, NotChecked=0, Total=1482 [2023-01-28 11:18:48,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 11:18:48,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 684 places, 1995 transitions, 66548 flow. Second operand has 39 states, 39 states have (on average 72.51282051282051) internal successors, (2828), 39 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:48,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:18:48,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 11:18:48,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:19:01,372 INFO L130 PetriNetUnfolder]: 4839/9193 cut-off events. [2023-01-28 11:19:01,373 INFO L131 PetriNetUnfolder]: For 495064/495064 co-relation queries the response was YES. [2023-01-28 11:19:01,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126219 conditions, 9193 events. 4839/9193 cut-off events. For 495064/495064 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 73512 event pairs, 500 based on Foata normal form. 4/9190 useless extension candidates. Maximal degree in co-relation 126002. Up to 7465 conditions per place. [2023-01-28 11:19:01,731 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1630 selfloop transitions, 473 changer transitions 13/2116 dead transitions. [2023-01-28 11:19:01,731 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 709 places, 2116 transitions, 72814 flow [2023-01-28 11:19:01,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 11:19:01,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 11:19:01,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2282 transitions. [2023-01-28 11:19:01,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28068880688806885 [2023-01-28 11:19:01,734 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2282 transitions. [2023-01-28 11:19:01,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2282 transitions. [2023-01-28 11:19:01,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:19:01,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2282 transitions. [2023-01-28 11:19:01,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 76.06666666666666) internal successors, (2282), 30 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:01,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:01,739 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 271.0) internal successors, (8401), 31 states have internal predecessors, (8401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:01,739 INFO L175 Difference]: Start difference. First operand has 684 places, 1995 transitions, 66548 flow. Second operand 30 states and 2282 transitions. [2023-01-28 11:19:01,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 709 places, 2116 transitions, 72814 flow [2023-01-28 11:19:09,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 691 places, 2116 transitions, 71613 flow, removed 185 selfloop flow, removed 18 redundant places. [2023-01-28 11:19:09,864 INFO L231 Difference]: Finished difference. Result has 700 places, 2024 transitions, 67782 flow [2023-01-28 11:19:09,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=65376, PETRI_DIFFERENCE_MINUEND_PLACES=662, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1995, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=67782, PETRI_PLACES=700, PETRI_TRANSITIONS=2024} [2023-01-28 11:19:09,866 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 679 predicate places. [2023-01-28 11:19:09,866 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 2024 transitions, 67782 flow [2023-01-28 11:19:09,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 72.51282051282051) internal successors, (2828), 39 states have internal predecessors, (2828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:09,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:19:09,866 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 11:19:09,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-01-28 11:19:10,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-01-28 11:19:10,067 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:19:10,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:19:10,067 INFO L85 PathProgramCache]: Analyzing trace with hash -2138745109, now seen corresponding path program 39 times [2023-01-28 11:19:10,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:19:10,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978210439] [2023-01-28 11:19:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:19:10,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:19:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:19:10,932 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 11:19:10,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:19:10,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978210439] [2023-01-28 11:19:10,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978210439] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:19:10,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746635318] [2023-01-28 11:19:10,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:19:10,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:19:10,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:19:10,934 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:19:10,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-01-28 11:19:11,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:19:11,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:19:11,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 77 conjunts are in the unsatisfiable core [2023-01-28 11:19:11,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:19:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:19:11,379 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 11:19:11,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:19:11,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 7 [2023-01-28 11:19:11,765 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 11:19:11,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:19:12,604 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:19:12,604 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 252 treesize of output 210 [2023-01-28 11:19:12,612 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 165 treesize of output 158 [2023-01-28 11:19:12,618 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:19:12,618 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 158 treesize of output 138 [2023-01-28 11:19:12,625 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:19:12,625 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 138 treesize of output 118 [2023-01-28 11:19:12,950 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 11:19:12,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746635318] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:19:12,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:19:12,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 35 [2023-01-28 11:19:12,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51199788] [2023-01-28 11:19:12,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:19:12,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-01-28 11:19:12,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:19:12,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-01-28 11:19:12,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1152, Unknown=1, NotChecked=0, Total=1332 [2023-01-28 11:19:12,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 11:19:12,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 2024 transitions, 67782 flow. Second operand has 37 states, 37 states have (on average 72.54054054054055) internal successors, (2684), 37 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:12,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:19:12,954 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 11:19:12,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:19:13,899 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse22 (* c_~q_front~0 4))) (let ((.cse11 (select |c_#memory_int| c_~q~0.base)) (.cse15 (+ .cse22 c_~q~0.offset 4)) (.cse19 (* c_~C~0 3))) (let ((.cse2 (+ (* (div (+ c_~y~0 .cse19) 4294967296) 4294967296) c_~x~0)) (.cse10 (select .cse11 .cse15)) (.cse18 (+ c_~q_front~0 2)) (.cse14 (+ .cse22 c_~q~0.offset))) (let ((.cse1 (* c_~C~0 2)) (.cse0 (forall ((v_ArrVal_1726 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1726) c_~q~0.base) .cse15) 0))) (.cse3 (forall ((v_ArrVal_1726 (Array Int Int))) (let ((.cse21 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1726) c_~q~0.base))) (let ((.cse20 (select .cse21 .cse15))) (or (= .cse20 0) (= c_~N~0 (+ .cse20 (select .cse21 .cse14)))))))) (.cse5 (<= c_~n~0 .cse18)) (.cse6 (= .cse10 0)) (.cse7 (<= c_~q_back~0 .cse18)) (.cse8 (= (+ (* (div c_~x~0 4294967296) 4294967296) c_~y~0 .cse19) .cse2)) (.cse9 (select .cse11 .cse14)) (.cse4 (< .cse18 0))) (and (or (< c_~q_back~0 0) (and (or .cse0 (= (+ (* (div (+ c_~C~0 c_~x~0) 4294967296) 4294967296) c_~y~0 .cse1) .cse2)) .cse3) (< |c_thread1Thread1of1ForFork0_~i~0#1| c_~N~0) .cse4) (or .cse5 .cse6 .cse7 .cse4 (and .cse8 (= (+ c_~s~0 .cse9 .cse10) c_~N~0))) (or (not (= (select .cse11 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (and (or .cse0 (= .cse2 (+ c_~C~0 c_~y~0 (* (div (+ .cse1 c_~x~0) 4294967296) 4294967296)))) (forall ((v_ArrVal_1726 (Array Int Int))) (let ((.cse13 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1726) c_~q~0.base))) (let ((.cse12 (select .cse13 .cse15))) (or (< (+ .cse12 (select .cse13 .cse14)) (+ 2 |c_thread1Thread1of1ForFork0_~i~0#1|)) (= .cse12 0))))) (forall ((v_ArrVal_1726 (Array Int Int))) (let ((.cse17 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1726) c_~q~0.base))) (let ((.cse16 (select .cse17 .cse15))) (or (< |c_thread1Thread1of1ForFork0_~i~0#1| (+ .cse16 (select .cse17 .cse14))) (= .cse16 0)))))) .cse4 (< (+ c_~q_back~0 1) 0)) (or .cse5 (and (or .cse8 .cse0) .cse3) .cse7 .cse4) (or .cse5 .cse6 .cse7 (and .cse8 (= c_~N~0 (+ .cse9 .cse10))) .cse4)))))) is different from false [2023-01-28 11:19:20,490 WARN L222 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 77 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:19:27,662 INFO L130 PetriNetUnfolder]: 4921/9397 cut-off events. [2023-01-28 11:19:27,662 INFO L131 PetriNetUnfolder]: For 486953/486953 co-relation queries the response was YES. [2023-01-28 11:19:27,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128648 conditions, 9397 events. 4921/9397 cut-off events. For 486953/486953 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 76049 event pairs, 536 based on Foata normal form. 2/9392 useless extension candidates. Maximal degree in co-relation 128427. Up to 7923 conditions per place. [2023-01-28 11:19:27,795 INFO L137 encePairwiseOnDemand]: 257/271 looper letters, 1679 selfloop transitions, 457 changer transitions 10/2146 dead transitions. [2023-01-28 11:19:27,795 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 2146 transitions, 73819 flow [2023-01-28 11:19:27,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 11:19:27,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 11:19:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2348 transitions. [2023-01-28 11:19:27,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2794905368408523 [2023-01-28 11:19:27,797 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2348 transitions. [2023-01-28 11:19:27,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2348 transitions. [2023-01-28 11:19:27,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:19:27,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2348 transitions. [2023-01-28 11:19:27,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 75.74193548387096) internal successors, (2348), 31 states have internal predecessors, (2348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:27,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:27,936 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 271.0) internal successors, (8672), 32 states have internal predecessors, (8672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:27,936 INFO L175 Difference]: Start difference. First operand has 700 places, 2024 transitions, 67782 flow. Second operand 31 states and 2348 transitions. [2023-01-28 11:19:27,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 2146 transitions, 73819 flow [2023-01-28 11:19:36,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 2146 transitions, 73193 flow, removed 107 selfloop flow, removed 18 redundant places. [2023-01-28 11:19:36,374 INFO L231 Difference]: Finished difference. Result has 724 places, 2064 transitions, 69707 flow [2023-01-28 11:19:36,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=67159, PETRI_DIFFERENCE_MINUEND_PLACES=681, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2024, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=69707, PETRI_PLACES=724, PETRI_TRANSITIONS=2064} [2023-01-28 11:19:36,376 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 703 predicate places. [2023-01-28 11:19:36,376 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 2064 transitions, 69707 flow [2023-01-28 11:19:36,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 72.54054054054055) internal successors, (2684), 37 states have internal predecessors, (2684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:36,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:19:36,376 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 11:19:36,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-01-28 11:19:36,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-01-28 11:19:36,577 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:19:36,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:19:36,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1228521943, now seen corresponding path program 40 times [2023-01-28 11:19:36,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:19:36,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725972166] [2023-01-28 11:19:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:19:36,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:19:36,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:19:37,485 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 11:19:37,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:19:37,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725972166] [2023-01-28 11:19:37,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725972166] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:19:37,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922431545] [2023-01-28 11:19:37,485 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:19:37,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:19:37,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:19:37,486 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:19:37,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-01-28 11:19:37,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:19:37,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:19:37,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-01-28 11:19:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:19:37,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:19:37,899 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 11:19:38,181 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:19:38,182 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 24 treesize of output 7 [2023-01-28 11:19:38,350 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 11:19:38,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:19:38,972 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:19:38,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 240 treesize of output 207 [2023-01-28 11:19:38,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:19:38,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 165 [2023-01-28 11:19:39,003 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:19:39,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 146 treesize of output 145 [2023-01-28 11:19:39,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 119 [2023-01-28 11:19:39,863 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 11:19:39,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922431545] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:19:39,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:19:39,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-01-28 11:19:39,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605427411] [2023-01-28 11:19:39,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:19:39,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 11:19:39,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:19:39,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 11:19:39,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1647, Unknown=3, NotChecked=0, Total=1892 [2023-01-28 11:19:39,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 11:19:39,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 2064 transitions, 69707 flow. Second operand has 44 states, 44 states have (on average 72.43181818181819) internal successors, (3187), 44 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:19:39,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:19:39,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 11:19:39,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:19:47,222 WARN L222 SmtUtils]: Spent 6.25s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:20:05,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:14,636 WARN L222 SmtUtils]: Spent 8.34s on a formula simplification. DAG size of input: 102 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:20:24,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:31,196 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:34,548 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:39,368 WARN L539 Checker$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 11:20:47,630 INFO L130 PetriNetUnfolder]: 4988/9543 cut-off events. [2023-01-28 11:20:47,630 INFO L131 PetriNetUnfolder]: For 525310/525310 co-relation queries the response was YES. [2023-01-28 11:20:47,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132501 conditions, 9543 events. 4988/9543 cut-off events. For 525310/525310 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 78008 event pairs, 674 based on Foata normal form. 120/9652 useless extension candidates. Maximal degree in co-relation 132271. Up to 7113 conditions per place. [2023-01-28 11:20:47,776 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1538 selfloop transitions, 703 changer transitions 55/2296 dead transitions. [2023-01-28 11:20:47,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 776 places, 2296 transitions, 76688 flow [2023-01-28 11:20:47,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-01-28 11:20:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-01-28 11:20:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4417 transitions. [2023-01-28 11:20:47,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28101539636086015 [2023-01-28 11:20:47,780 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4417 transitions. [2023-01-28 11:20:47,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4417 transitions. [2023-01-28 11:20:47,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:20:47,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4417 transitions. [2023-01-28 11:20:47,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 76.15517241379311) internal successors, (4417), 58 states have internal predecessors, (4417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:20:47,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 271.0) internal successors, (15989), 59 states have internal predecessors, (15989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:20:47,795 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 271.0) internal successors, (15989), 59 states have internal predecessors, (15989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:20:47,795 INFO L175 Difference]: Start difference. First operand has 724 places, 2064 transitions, 69707 flow. Second operand 58 states and 4417 transitions. [2023-01-28 11:20:47,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 776 places, 2296 transitions, 76688 flow [2023-01-28 11:20:55,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 755 places, 2296 transitions, 75728 flow, removed 315 selfloop flow, removed 21 redundant places. [2023-01-28 11:20:55,555 INFO L231 Difference]: Finished difference. Result has 784 places, 2109 transitions, 71100 flow [2023-01-28 11:20:55,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=63069, PETRI_DIFFERENCE_MINUEND_PLACES=698, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1942, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=550, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=71100, PETRI_PLACES=784, PETRI_TRANSITIONS=2109} [2023-01-28 11:20:55,557 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 763 predicate places. [2023-01-28 11:20:55,557 INFO L495 AbstractCegarLoop]: Abstraction has has 784 places, 2109 transitions, 71100 flow [2023-01-28 11:20:55,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 72.43181818181819) internal successors, (3187), 44 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:20:55,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:20:55,557 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 11:20:55,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-01-28 11:20:55,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-01-28 11:20:55,758 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:20:55,758 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:20:55,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1324461631, now seen corresponding path program 41 times [2023-01-28 11:20:55,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:20:55,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157699577] [2023-01-28 11:20:55,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:20:55,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:20:55,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:20:56,695 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 11:20:56,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:20:56,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157699577] [2023-01-28 11:20:56,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157699577] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:20:56,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906403708] [2023-01-28 11:20:56,695 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:20:56,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:20:56,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:20:56,696 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:20:56,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-01-28 11:20:56,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:20:56,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:20:56,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 11:20:56,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:20:57,345 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 11:20:57,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:20:57,738 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:20:57,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 88 treesize of output 73 [2023-01-28 11:20:58,141 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 11:20:58,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906403708] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:20:58,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:20:58,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 36 [2023-01-28 11:20:58,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635731559] [2023-01-28 11:20:58,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:20:58,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-01-28 11:20:58,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:20:58,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-01-28 11:20:58,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1283, Unknown=0, NotChecked=0, Total=1406 [2023-01-28 11:20:58,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 11:20:58,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 784 places, 2109 transitions, 71100 flow. Second operand has 38 states, 38 states have (on average 69.60526315789474) internal successors, (2645), 38 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:20:58,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:20:58,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 11:20:58,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:21:08,380 INFO L130 PetriNetUnfolder]: 4955/9489 cut-off events. [2023-01-28 11:21:08,380 INFO L131 PetriNetUnfolder]: For 503788/503788 co-relation queries the response was YES. [2023-01-28 11:21:08,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133953 conditions, 9489 events. 4955/9489 cut-off events. For 503788/503788 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 77342 event pairs, 574 based on Foata normal form. 5/9486 useless extension candidates. Maximal degree in co-relation 133699. Up to 4162 conditions per place. [2023-01-28 11:21:08,561 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1571 selfloop transitions, 605 changer transitions 38/2214 dead transitions. [2023-01-28 11:21:08,561 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 809 places, 2214 transitions, 77528 flow [2023-01-28 11:21:08,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 11:21:08,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 11:21:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2446 transitions. [2023-01-28 11:21:08,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2654655958324289 [2023-01-28 11:21:08,564 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2446 transitions. [2023-01-28 11:21:08,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2446 transitions. [2023-01-28 11:21:08,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:21:08,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2446 transitions. [2023-01-28 11:21:08,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 71.94117647058823) internal successors, (2446), 34 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:21:08,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:21:08,570 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 271.0) internal successors, (9485), 35 states have internal predecessors, (9485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:21:08,570 INFO L175 Difference]: Start difference. First operand has 784 places, 2109 transitions, 71100 flow. Second operand 34 states and 2446 transitions. [2023-01-28 11:21:08,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 809 places, 2214 transitions, 77528 flow [2023-01-28 11:21:19,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 788 places, 2214 transitions, 76449 flow, removed 472 selfloop flow, removed 21 redundant places. [2023-01-28 11:21:19,732 INFO L231 Difference]: Finished difference. Result has 793 places, 2124 transitions, 72278 flow [2023-01-28 11:21:19,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=70107, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=587, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=72278, PETRI_PLACES=793, PETRI_TRANSITIONS=2124} [2023-01-28 11:21:19,734 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 772 predicate places. [2023-01-28 11:21:19,734 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 2124 transitions, 72278 flow [2023-01-28 11:21:19,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 69.60526315789474) internal successors, (2645), 38 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:21:19,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:21:19,734 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 11:21:19,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-01-28 11:21:19,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:21:19,936 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:21:19,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:21:19,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1987891647, now seen corresponding path program 42 times [2023-01-28 11:21:19,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:21:19,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065024381] [2023-01-28 11:21:19,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:21:19,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:21:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:21:20,988 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 11:21:20,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:21:20,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065024381] [2023-01-28 11:21:20,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065024381] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:21:20,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408015922] [2023-01-28 11:21:20,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:21:20,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:21:20,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:21:20,990 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:21:20,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-01-28 11:21:21,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:21:21,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:21:21,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 11:21:21,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:21:21,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:21:21,479 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 11:21:21,839 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 11:21:21,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:21:22,347 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:21:22,347 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 150 treesize of output 135 [2023-01-28 11:21:22,356 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:21:22,356 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 90 treesize of output 77 [2023-01-28 11:21:22,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:21:22,364 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 77 treesize of output 64 [2023-01-28 11:21:22,705 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 11:21:22,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408015922] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:21:22,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:21:22,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 38 [2023-01-28 11:21:22,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557977743] [2023-01-28 11:21:22,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:21:22,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 11:21:22,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:21:22,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 11:21:22,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1444, Unknown=2, NotChecked=0, Total=1560 [2023-01-28 11:21:22,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 11:21:22,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 2124 transitions, 72278 flow. Second operand has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:21:22,710 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:21:22,710 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 11:21:22,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:21:32,147 INFO L130 PetriNetUnfolder]: 4938/9439 cut-off events. [2023-01-28 11:21:32,147 INFO L131 PetriNetUnfolder]: For 531149/531149 co-relation queries the response was YES. [2023-01-28 11:21:32,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134405 conditions, 9439 events. 4938/9439 cut-off events. For 531149/531149 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 76683 event pairs, 726 based on Foata normal form. 2/9433 useless extension candidates. Maximal degree in co-relation 134154. Up to 8703 conditions per place. [2023-01-28 11:21:32,298 INFO L137 encePairwiseOnDemand]: 261/271 looper letters, 1893 selfloop transitions, 287 changer transitions 6/2186 dead transitions. [2023-01-28 11:21:32,298 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 811 places, 2186 transitions, 77470 flow [2023-01-28 11:21:32,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 11:21:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 11:21:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1815 transitions. [2023-01-28 11:21:32,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2790590405904059 [2023-01-28 11:21:32,300 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1815 transitions. [2023-01-28 11:21:32,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1815 transitions. [2023-01-28 11:21:32,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:21:32,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1815 transitions. [2023-01-28 11:21:32,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 75.625) internal successors, (1815), 24 states have internal predecessors, (1815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:21:32,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:21:32,304 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 271.0) internal successors, (6775), 25 states have internal predecessors, (6775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:21:32,304 INFO L175 Difference]: Start difference. First operand has 793 places, 2124 transitions, 72278 flow. Second operand 24 states and 1815 transitions. [2023-01-28 11:21:32,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 811 places, 2186 transitions, 77470 flow [2023-01-28 11:21:42,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 784 places, 2186 transitions, 76673 flow, removed 155 selfloop flow, removed 27 redundant places. [2023-01-28 11:21:42,265 INFO L231 Difference]: Finished difference. Result has 789 places, 2132 transitions, 72491 flow [2023-01-28 11:21:42,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=71505, PETRI_DIFFERENCE_MINUEND_PLACES=761, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=72491, PETRI_PLACES=789, PETRI_TRANSITIONS=2132} [2023-01-28 11:21:42,266 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 768 predicate places. [2023-01-28 11:21:42,266 INFO L495 AbstractCegarLoop]: Abstraction has has 789 places, 2132 transitions, 72491 flow [2023-01-28 11:21:42,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:21:42,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:21:42,267 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 11:21:42,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-01-28 11:21:42,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:21:42,468 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:21:42,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:21:42,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1667642457, now seen corresponding path program 43 times [2023-01-28 11:21:42,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:21:42,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359023964] [2023-01-28 11:21:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:21:42,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:21:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:21:43,377 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 11:21:43,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:21:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359023964] [2023-01-28 11:21:43,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359023964] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:21:43,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62541174] [2023-01-28 11:21:43,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:21:43,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:21:43,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:21:43,378 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:21:43,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-01-28 11:21:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:21:43,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 90 conjunts are in the unsatisfiable core [2023-01-28 11:21:43,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:21:43,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:21:43,841 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 11:21:44,324 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 11:21:44,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:21:44,946 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:21:44,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 141 [2023-01-28 11:21:44,963 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:21:44,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 99 [2023-01-28 11:21:44,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2023-01-28 11:21:45,834 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 11:21:45,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62541174] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:21:45,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:21:45,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-01-28 11:21:45,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913731034] [2023-01-28 11:21:45,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:21:45,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 11:21:45,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:21:45,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 11:21:45,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=1674, Unknown=2, NotChecked=0, Total=1892 [2023-01-28 11:21:45,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 11:21:45,838 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 2132 transitions, 72491 flow. Second operand has 44 states, 44 states have (on average 72.43181818181819) internal successors, (3187), 44 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:21:45,838 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:21:45,838 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 11:21:45,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:02,281 WARN L222 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 116 DAG size of output: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:22:23,936 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 11:22:32,459 INFO L130 PetriNetUnfolder]: 5212/9865 cut-off events. [2023-01-28 11:22:32,459 INFO L131 PetriNetUnfolder]: For 557477/557477 co-relation queries the response was YES. [2023-01-28 11:22:32,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140404 conditions, 9865 events. 5212/9865 cut-off events. For 557477/557477 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 80023 event pairs, 190 based on Foata normal form. 4/9861 useless extension candidates. Maximal degree in co-relation 140153. Up to 3187 conditions per place. [2023-01-28 11:22:32,635 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1206 selfloop transitions, 1130 changer transitions 29/2365 dead transitions. [2023-01-28 11:22:32,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 826 places, 2365 transitions, 82665 flow [2023-01-28 11:22:32,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 11:22:32,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 11:22:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2970 transitions. [2023-01-28 11:22:32,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2810105024127164 [2023-01-28 11:22:32,638 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2970 transitions. [2023-01-28 11:22:32,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2970 transitions. [2023-01-28 11:22:32,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:32,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2970 transitions. [2023-01-28 11:22:32,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 76.15384615384616) internal successors, (2970), 39 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:32,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 271.0) internal successors, (10840), 40 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:32,647 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 271.0) internal successors, (10840), 40 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:32,648 INFO L175 Difference]: Start difference. First operand has 789 places, 2132 transitions, 72491 flow. Second operand 39 states and 2970 transitions. [2023-01-28 11:22:32,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 826 places, 2365 transitions, 82665 flow [2023-01-28 11:22:42,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 812 places, 2365 transitions, 82089 flow, removed 71 selfloop flow, removed 14 redundant places. [2023-01-28 11:22:42,459 INFO L231 Difference]: Finished difference. Result has 822 places, 2252 transitions, 78760 flow [2023-01-28 11:22:42,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=71908, PETRI_DIFFERENCE_MINUEND_PLACES=774, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1048, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=78760, PETRI_PLACES=822, PETRI_TRANSITIONS=2252} [2023-01-28 11:22:42,461 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 801 predicate places. [2023-01-28 11:22:42,461 INFO L495 AbstractCegarLoop]: Abstraction has has 822 places, 2252 transitions, 78760 flow [2023-01-28 11:22:42,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 72.43181818181819) internal successors, (3187), 44 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:42,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:22:42,462 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 11:22:42,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-01-28 11:22:42,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:22:42,668 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:22:42,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:22:42,668 INFO L85 PathProgramCache]: Analyzing trace with hash 272795179, now seen corresponding path program 44 times [2023-01-28 11:22:42,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:22:42,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114804249] [2023-01-28 11:22:42,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:22:42,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:22:42,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:22:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:22:43,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:22:43,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114804249] [2023-01-28 11:22:43,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114804249] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:22:43,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786883009] [2023-01-28 11:22:43,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:22:43,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:22:43,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:22:43,670 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:22:43,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-01-28 11:22:43,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:22:43,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:22:43,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 80 conjunts are in the unsatisfiable core [2023-01-28 11:22:43,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:22:44,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:22:44,060 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 11:22:44,443 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 11:22:44,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:22:45,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:22:45,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 141 [2023-01-28 11:22:45,092 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:22:45,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 99 [2023-01-28 11:22:45,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2023-01-28 11:22:45,819 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 11:22:45,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786883009] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:22:45,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:22:45,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 38 [2023-01-28 11:22:45,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162221560] [2023-01-28 11:22:45,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:22:45,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 11:22:45,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:22:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 11:22:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1433, Unknown=4, NotChecked=0, Total=1560 [2023-01-28 11:22:45,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 271 [2023-01-28 11:22:45,822 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 822 places, 2252 transitions, 78760 flow. Second operand has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:45,822 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:22:45,822 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 271 [2023-01-28 11:22:45,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:22:52,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:55,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:23:07,122 INFO L130 PetriNetUnfolder]: 5194/9833 cut-off events. [2023-01-28 11:23:07,122 INFO L131 PetriNetUnfolder]: For 577350/577350 co-relation queries the response was YES. [2023-01-28 11:23:07,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143373 conditions, 9833 events. 5194/9833 cut-off events. For 577350/577350 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 79158 event pairs, 123 based on Foata normal form. 4/9829 useless extension candidates. Maximal degree in co-relation 143113. Up to 3274 conditions per place. [2023-01-28 11:23:07,291 INFO L137 encePairwiseOnDemand]: 260/271 looper letters, 1410 selfloop transitions, 936 changer transitions 10/2356 dead transitions. [2023-01-28 11:23:07,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 853 places, 2356 transitions, 84833 flow [2023-01-28 11:23:07,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 11:23:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 11:23:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2720 transitions. [2023-01-28 11:23:07,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2788027880278803 [2023-01-28 11:23:07,400 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2720 transitions. [2023-01-28 11:23:07,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2720 transitions. [2023-01-28 11:23:07,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:23:07,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2720 transitions. [2023-01-28 11:23:07,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 75.55555555555556) internal successors, (2720), 36 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:23:07,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:23:07,407 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 271.0) internal successors, (10027), 37 states have internal predecessors, (10027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:23:07,408 INFO L175 Difference]: Start difference. First operand has 822 places, 2252 transitions, 78760 flow. Second operand 36 states and 2720 transitions. [2023-01-28 11:23:07,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 853 places, 2356 transitions, 84833 flow [2023-01-28 11:23:17,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 835 places, 2356 transitions, 84400 flow, removed 142 selfloop flow, removed 18 redundant places. [2023-01-28 11:23:17,942 INFO L231 Difference]: Finished difference. Result has 839 places, 2258 transitions, 80549 flow [2023-01-28 11:23:17,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=78335, PETRI_DIFFERENCE_MINUEND_PLACES=800, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=927, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=80549, PETRI_PLACES=839, PETRI_TRANSITIONS=2258} [2023-01-28 11:23:17,943 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, 818 predicate places. [2023-01-28 11:23:17,943 INFO L495 AbstractCegarLoop]: Abstraction has has 839 places, 2258 transitions, 80549 flow [2023-01-28 11:23:17,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 72.525) internal successors, (2901), 40 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:23:17,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:23:17,943 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 11:23:17,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-01-28 11:23:18,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-01-28 11:23:18,144 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 11:23:18,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:23:18,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1612997431, now seen corresponding path program 45 times [2023-01-28 11:23:18,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:23:18,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370161753] [2023-01-28 11:23:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:23:18,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:23:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:23:19,007 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 11:23:19,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:23:19,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370161753] [2023-01-28 11:23:19,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370161753] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:23:19,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302145824] [2023-01-28 11:23:19,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:23:19,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:23:19,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:23:19,008 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:23:19,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-01-28 11:23:19,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:23:19,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:23:19,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 97 conjunts are in the unsatisfiable core [2023-01-28 11:23:19,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:23:19,409 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 11:23:19,452 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 11:23:19,503 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 11:23:19,546 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 11:23:19,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:23:19,745 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 11:23:20,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:23:20,050 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:23:20,050 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 46 treesize of output 26 [2023-01-28 11:23:20,257 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 11:23:20,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:23:33,448 WARN L222 SmtUtils]: Spent 12.27s on a formula simplification. DAG size of input: 69 DAG size of output: 68 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:23:38,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:23:38,260 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 226 treesize of output 124 [2023-01-28 11:23:38,302 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 11:23:38,302 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 281 treesize of output 275 [2023-01-28 11:23:38,324 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:23:38,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 215 treesize of output 181 [2023-01-28 11:23:38,429 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 11:23:38,429 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 141 treesize of output 145 [2023-01-28 11:23:39,789 INFO L321 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-01-28 11:23:39,789 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 226 treesize of output 1 [2023-01-28 11:23:39,807 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:23:39,808 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 136 treesize of output 90 [2023-01-28 11:23:39,813 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 11:23:39,830 INFO L321 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2023-01-28 11:23:39,830 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 96 treesize of output 75 [2023-01-28 11:23:39,847 INFO L321 Elim1Store]: treesize reduction 25, result has 13.8 percent of original size [2023-01-28 11:23:39,847 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 63 treesize of output 48 [2023-01-28 11:23:40,062 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 11:23:40,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302145824] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:23:40,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:23:40,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-01-28 11:23:40,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177835718] [2023-01-28 11:23:40,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:23:40,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 11:23:40,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:23:40,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 11:23:40,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1679, Unknown=8, NotChecked=0, Total=1892 [2023-01-28 11:23:40,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 271 [2023-01-28 11:23:40,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 839 places, 2258 transitions, 80549 flow. Second operand has 44 states, 44 states have (on average 69.43181818181819) internal successors, (3055), 44 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:23:40,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:23:40,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 271 [2023-01-28 11:23:40,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:23:50,604 WARN L222 SmtUtils]: Spent 9.89s on a formula simplification. DAG size of input: 141 DAG size of output: 123 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:24:08,067 WARN L222 SmtUtils]: Spent 14.47s on a formula simplification. DAG size of input: 132 DAG size of output: 131 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:24:14,405 WARN L222 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 126 DAG size of output: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:24:32,861 WARN L222 SmtUtils]: Spent 8.36s on a formula simplification. DAG size of input: 155 DAG size of output: 121 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:24:39,560 WARN L222 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 156 DAG size of output: 131 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:24:45,435 WARN L222 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 127 DAG size of output: 118 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) Received shutdown request... [2023-01-28 11:24:48,744 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 11:24:48,744 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 11:24:49,611 WARN L238 SmtUtils]: Removed 7 from assertion stack [2023-01-28 11:24:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 11:24:49,613 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 11:24:49,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-01-28 11:24:49,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-01-28 11:24:49,813 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 159 for 3037ms.. [2023-01-28 11:24:49,815 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 11:24:49,815 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 11:24:49,815 INFO L445 BasicCegarLoop]: Path program histogram: [45, 5, 4, 1, 1] [2023-01-28 11:24:49,817 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 11:24:49,817 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 11:24:49,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 11:24:49 BasicIcfg [2023-01-28 11:24:49,819 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 11:24:49,819 INFO L158 Benchmark]: Toolchain (without parser) took 789381.80ms. Allocated memory was 381.7MB in the beginning and 5.9GB in the end (delta: 5.5GB). Free memory was 341.8MB in the beginning and 2.3GB in the end (delta: -2.0GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. [2023-01-28 11:24:49,819 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.3MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 11:24:49,820 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.50ms. Allocated memory is still 381.7MB. Free memory was 341.4MB in the beginning and 329.9MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 11:24:49,820 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.09ms. Allocated memory is still 381.7MB. Free memory was 329.9MB in the beginning and 327.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:24:49,820 INFO L158 Benchmark]: Boogie Preprocessor took 39.82ms. Allocated memory is still 381.7MB. Free memory was 327.8MB in the beginning and 326.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:24:49,820 INFO L158 Benchmark]: RCFGBuilder took 528.44ms. Allocated memory is still 381.7MB. Free memory was 326.1MB in the beginning and 302.0MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-01-28 11:24:49,820 INFO L158 Benchmark]: TraceAbstraction took 788544.51ms. Allocated memory was 381.7MB in the beginning and 5.9GB in the end (delta: 5.5GB). Free memory was 301.3MB in the beginning and 2.3GB in the end (delta: -2.0GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. [2023-01-28 11:24:49,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 255.9MB. Free memory is still 213.3MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 229.50ms. Allocated memory is still 381.7MB. Free memory was 341.4MB in the beginning and 329.9MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 33.09ms. Allocated memory is still 381.7MB. Free memory was 329.9MB in the beginning and 327.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 39.82ms. Allocated memory is still 381.7MB. Free memory was 327.8MB in the beginning and 326.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 528.44ms. Allocated memory is still 381.7MB. Free memory was 326.1MB in the beginning and 302.0MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 788544.51ms. Allocated memory was 381.7MB in the beginning and 5.9GB in the end (delta: 5.5GB). Free memory was 301.3MB in the beginning and 2.3GB in the end (delta: -2.0GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 124 PlacesBefore, 21 PlacesAfterwards, 128 TransitionsBefore, 17 TransitionsAfterwards, 690 CoEnabledTransitionPairs, 8 FixpointIterations, 80 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 16 TrivialYvCompositions, 7 ConcurrentYvCompositions, 8 ChoiceCompositions, 133 TotalNumberOfCompositions, 839 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 763, independent: 739, independent conditional: 0, independent unconditional: 739, dependent: 24, dependent conditional: 0, dependent unconditional: 24, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 407, independent: 397, independent conditional: 0, independent unconditional: 397, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 763, independent: 342, independent conditional: 0, independent unconditional: 342, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 407, unknown conditional: 0, unknown unconditional: 407] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 18, Positive conditional cache size: 0, Positive unconditional cache size: 18, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 159 for 3037ms.. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 159 for 3037ms.. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 159 for 3037ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 152 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 788.4s, OverallIterations: 56, TraceHistogramMax: 4, PathProgramHistogramMax: 45, EmptinessCheckTime: 0.0s, AutomataDifference: 611.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 212 mSolverCounterUnknown, 7476 SdHoareTripleChecker+Valid, 88.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7476 mSDsluCounter, 683 SdHoareTripleChecker+Invalid, 83.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1266 IncrementalHoareTripleChecker+Unchecked, 629 mSDsCounter, 2100 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56039 IncrementalHoareTripleChecker+Invalid, 59617 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2100 mSolverCounterUnsat, 54 mSDtfsCounter, 56039 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3504 GetRequests, 922 SyntacticMatches, 18 SemanticMatches, 2563 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 30290 ImplicationChecksByTransitivity, 337.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80549occurred in iteration=55, InterpolantAutomatonStates: 1476, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 5.0s SatisfiabilityAnalysisTime, 152.8s InterpolantComputationTime, 2070 NumberOfCodeBlocks, 2065 NumberOfCodeBlocksAsserted, 159 NumberOfCheckSat, 2904 ConstructedInterpolants, 395 QuantifiedInterpolants, 79624 SizeOfPredicates, 1011 NumberOfNonLiveVariables, 12408 ConjunctsInSsa, 3071 ConjunctsInUnsatCore, 156 InterpolantComputations, 7 PerfectInterpolantSequences, 261/1425 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