/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-channel-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 10:15:39,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 10:15:39,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 10:15:39,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 10:15:39,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 10:15:39,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 10:15:39,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 10:15:39,728 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 10:15:39,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 10:15:39,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 10:15:39,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 10:15:39,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 10:15:39,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 10:15:39,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 10:15:39,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 10:15:39,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 10:15:39,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 10:15:39,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 10:15:39,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 10:15:39,736 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 10:15:39,736 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 10:15:39,737 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 10:15:39,738 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 10:15:39,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 10:15:39,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 10:15:39,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 10:15:39,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 10:15:39,741 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 10:15:39,742 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 10:15:39,742 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 10:15:39,743 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 10:15:39,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 10:15:39,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 10:15:39,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 10:15:39,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 10:15:39,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 10:15:39,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 10:15:39,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 10:15:39,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 10:15:39,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 10:15:39,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 10:15:39,747 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 10:15:39,759 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 10:15:39,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 10:15:39,760 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 10:15:39,760 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 10:15:39,760 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 10:15:39,760 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 10:15:39,761 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 10:15:39,761 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 10:15:39,761 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 10:15:39,761 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 10:15:39,761 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 10:15:39,761 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 10:15:39,761 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 10:15:39,761 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 10:15:39,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 10:15:39,761 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 10:15:39,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 10:15:39,762 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 10:15:39,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 10:15:39,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 10:15:39,762 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 10:15:39,762 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 10:15:39,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 10:15:39,762 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:15:39,762 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 10:15:39,762 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 10:15:39,762 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 10:15:39,762 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 10:15:39,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 10:15:39,763 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 10:15:39,763 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 10:15:39,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 10:15:39,906 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 10:15:39,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 10:15:39,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 10:15:39,921 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 10:15:39,921 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 10:15:39,922 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-01-28 10:15:40,895 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 10:15:41,031 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 10:15:41,031 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-01-28 10:15:41,036 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a8bb0682/e09998de0dae4044b9490506dd469515/FLAG15c0900e5 [2023-01-28 10:15:41,049 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a8bb0682/e09998de0dae4044b9490506dd469515 [2023-01-28 10:15:41,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 10:15:41,051 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 10:15:41,054 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 10:15:41,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 10:15:41,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 10:15:41,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@569f3085 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41, skipping insertion in model container [2023-01-28 10:15:41,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 10:15:41,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 10:15:41,214 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-channel-sum.wvr.c[2947,2960] [2023-01-28 10:15:41,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:15:41,227 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 10:15:41,239 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-channel-sum.wvr.c[2947,2960] [2023-01-28 10:15:41,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:15:41,246 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:15:41,246 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:15:41,250 INFO L208 MainTranslator]: Completed translation [2023-01-28 10:15:41,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41 WrapperNode [2023-01-28 10:15:41,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 10:15:41,251 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 10:15:41,252 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 10:15:41,252 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 10:15:41,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,288 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 155 [2023-01-28 10:15:41,289 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 10:15:41,289 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 10:15:41,289 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 10:15:41,289 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 10:15:41,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,318 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,319 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 10:15:41,321 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 10:15:41,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 10:15:41,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 10:15:41,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (1/1) ... [2023-01-28 10:15:41,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:15:41,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:41,353 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 10:15:41,369 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 10:15:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 10:15:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 10:15:41,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 10:15:41,377 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 10:15:41,377 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 10:15:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 10:15:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 10:15:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 10:15:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 10:15:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 10:15:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 10:15:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 10:15:41,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 10:15:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 10:15:41,378 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 10:15:41,379 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 10:15:41,440 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 10:15:41,441 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 10:15:41,630 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 10:15:41,680 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 10:15:41,680 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 10:15:41,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:15:41 BoogieIcfgContainer [2023-01-28 10:15:41,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 10:15:41,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 10:15:41,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 10:15:41,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 10:15:41,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 10:15:41" (1/3) ... [2023-01-28 10:15:41,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d398bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:15:41, skipping insertion in model container [2023-01-28 10:15:41,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:15:41" (2/3) ... [2023-01-28 10:15:41,686 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d398bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:15:41, skipping insertion in model container [2023-01-28 10:15:41,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:15:41" (3/3) ... [2023-01-28 10:15:41,687 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-01-28 10:15:41,698 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 10:15:41,698 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 10:15:41,698 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 10:15:41,771 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 10:15:41,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 135 transitions, 286 flow [2023-01-28 10:15:41,846 INFO L130 PetriNetUnfolder]: 11/133 cut-off events. [2023-01-28 10:15:41,846 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:15:41,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142 conditions, 133 events. 11/133 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 126 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-01-28 10:15:41,850 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 135 transitions, 286 flow [2023-01-28 10:15:41,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 125 transitions, 262 flow [2023-01-28 10:15:41,855 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 10:15:41,860 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 125 transitions, 262 flow [2023-01-28 10:15:41,862 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 125 transitions, 262 flow [2023-01-28 10:15:41,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 125 transitions, 262 flow [2023-01-28 10:15:41,885 INFO L130 PetriNetUnfolder]: 11/125 cut-off events. [2023-01-28 10:15:41,886 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:15:41,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 125 events. 11/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-01-28 10:15:41,887 INFO L119 LiptonReduction]: Number of co-enabled transitions 1296 [2023-01-28 10:15:45,603 INFO L134 LiptonReduction]: Checked pairs total: 1508 [2023-01-28 10:15:45,603 INFO L136 LiptonReduction]: Total number of compositions: 132 [2023-01-28 10:15:45,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 10:15:45,631 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;@1f62c0d2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 10:15:45,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 10:15:45,640 INFO L130 PetriNetUnfolder]: 4/18 cut-off events. [2023-01-28 10:15:45,640 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:15:45,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:45,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:15:45,641 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 10:15:45,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:45,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1385195944, now seen corresponding path program 1 times [2023-01-28 10:15:45,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:45,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744208623] [2023-01-28 10:15:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:45,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:45,958 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 10:15:45,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:45,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744208623] [2023-01-28 10:15:45,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744208623] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:15:45,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:15:45,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 10:15:45,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912319194] [2023-01-28 10:15:45,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:15:45,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 10:15:45,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:45,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 10:15:45,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 10:15:45,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 267 [2023-01-28 10:15:45,983 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:45,983 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:45,983 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 267 [2023-01-28 10:15:45,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:46,055 INFO L130 PetriNetUnfolder]: 87/153 cut-off events. [2023-01-28 10:15:46,055 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 10:15:46,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328 conditions, 153 events. 87/153 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 486 event pairs, 21 based on Foata normal form. 1/106 useless extension candidates. Maximal degree in co-relation 244. Up to 87 conditions per place. [2023-01-28 10:15:46,057 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 21 selfloop transitions, 2 changer transitions 4/29 dead transitions. [2023-01-28 10:15:46,057 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 133 flow [2023-01-28 10:15:46,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 10:15:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 10:15:46,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-01-28 10:15:46,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681647940074906 [2023-01-28 10:15:46,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-01-28 10:15:46,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-01-28 10:15:46,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:46,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-01-28 10:15:46,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,085 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,086 INFO L175 Difference]: Start difference. First operand has 22 places, 19 transitions, 50 flow. Second operand 3 states and 375 transitions. [2023-01-28 10:15:46,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 133 flow [2023-01-28 10:15:46,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 29 transitions, 119 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 10:15:46,090 INFO L231 Difference]: Finished difference. Result has 21 places, 19 transitions, 52 flow [2023-01-28 10:15:46,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=52, PETRI_PLACES=21, PETRI_TRANSITIONS=19} [2023-01-28 10:15:46,095 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -1 predicate places. [2023-01-28 10:15:46,095 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 19 transitions, 52 flow [2023-01-28 10:15:46,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:46,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:15:46,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 10:15:46,096 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 10:15:46,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1301726337, now seen corresponding path program 1 times [2023-01-28 10:15:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:46,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900498458] [2023-01-28 10:15:46,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:46,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:15:46,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:46,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900498458] [2023-01-28 10:15:46,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900498458] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:15:46,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:15:46,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 10:15:46,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535747695] [2023-01-28 10:15:46,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:15:46,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:15:46,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:46,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:15:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 10:15:46,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 267 [2023-01-28 10:15:46,328 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 19 transitions, 52 flow. Second operand has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,328 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:46,328 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 267 [2023-01-28 10:15:46,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:46,416 INFO L130 PetriNetUnfolder]: 74/139 cut-off events. [2023-01-28 10:15:46,416 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:15:46,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 299 conditions, 139 events. 74/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 381 event pairs, 11 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 191. Up to 98 conditions per place. [2023-01-28 10:15:46,417 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 21 selfloop transitions, 4 changer transitions 6/32 dead transitions. [2023-01-28 10:15:46,417 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 32 transitions, 143 flow [2023-01-28 10:15:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 10:15:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 10:15:46,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 455 transitions. [2023-01-28 10:15:46,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42602996254681647 [2023-01-28 10:15:46,419 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 455 transitions. [2023-01-28 10:15:46,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 455 transitions. [2023-01-28 10:15:46,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:46,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 455 transitions. [2023-01-28 10:15:46,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 113.75) internal successors, (455), 4 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,423 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,423 INFO L175 Difference]: Start difference. First operand has 21 places, 19 transitions, 52 flow. Second operand 4 states and 455 transitions. [2023-01-28 10:15:46,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 32 transitions, 143 flow [2023-01-28 10:15:46,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 32 transitions, 141 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:15:46,424 INFO L231 Difference]: Finished difference. Result has 25 places, 22 transitions, 75 flow [2023-01-28 10:15:46,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=22} [2023-01-28 10:15:46,424 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 3 predicate places. [2023-01-28 10:15:46,424 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 22 transitions, 75 flow [2023-01-28 10:15:46,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:46,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:15:46,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 10:15:46,425 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 10:15:46,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:46,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1080410029, now seen corresponding path program 1 times [2023-01-28 10:15:46,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:46,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677893956] [2023-01-28 10:15:46,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:46,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:46,521 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 10:15:46,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:46,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677893956] [2023-01-28 10:15:46,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677893956] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:15:46,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:15:46,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 10:15:46,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477728996] [2023-01-28 10:15:46,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:15:46,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:15:46,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:15:46,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 10:15:46,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 267 [2023-01-28 10:15:46,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 75 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:46,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 267 [2023-01-28 10:15:46,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:46,585 INFO L130 PetriNetUnfolder]: 74/157 cut-off events. [2023-01-28 10:15:46,585 INFO L131 PetriNetUnfolder]: For 37/46 co-relation queries the response was YES. [2023-01-28 10:15:46,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377 conditions, 157 events. 74/157 cut-off events. For 37/46 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 523 event pairs, 50 based on Foata normal form. 14/166 useless extension candidates. Maximal degree in co-relation 269. Up to 123 conditions per place. [2023-01-28 10:15:46,589 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 18 selfloop transitions, 2 changer transitions 10/33 dead transitions. [2023-01-28 10:15:46,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 33 transitions, 161 flow [2023-01-28 10:15:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 10:15:46,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 10:15:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 440 transitions. [2023-01-28 10:15:46,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41198501872659177 [2023-01-28 10:15:46,590 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 440 transitions. [2023-01-28 10:15:46,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 440 transitions. [2023-01-28 10:15:46,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:46,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 440 transitions. [2023-01-28 10:15:46,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,593 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 267.0) internal successors, (1335), 5 states have internal predecessors, (1335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,593 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 75 flow. Second operand 4 states and 440 transitions. [2023-01-28 10:15:46,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 33 transitions, 161 flow [2023-01-28 10:15:46,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 33 transitions, 161 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 10:15:46,595 INFO L231 Difference]: Finished difference. Result has 30 places, 23 transitions, 91 flow [2023-01-28 10:15:46,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=30, PETRI_TRANSITIONS=23} [2023-01-28 10:15:46,596 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 8 predicate places. [2023-01-28 10:15:46,598 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 23 transitions, 91 flow [2023-01-28 10:15:46,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:46,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:46,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:15:46,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 10:15:46,599 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 10:15:46,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:46,599 INFO L85 PathProgramCache]: Analyzing trace with hash -350690420, now seen corresponding path program 1 times [2023-01-28 10:15:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:46,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089399985] [2023-01-28 10:15:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:46,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:15:46,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:46,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089399985] [2023-01-28 10:15:46,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089399985] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:46,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532671841] [2023-01-28 10:15:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:46,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:46,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:46,780 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 10:15:46,816 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 10:15:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:46,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 10:15:46,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:47,177 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 148 treesize of output 116 [2023-01-28 10:15:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:15:47,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:47,415 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 4 [2023-01-28 10:15:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:15:47,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532671841] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:47,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:47,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 10 [2023-01-28 10:15:47,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182356548] [2023-01-28 10:15:47,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:47,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 10:15:47,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:47,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 10:15:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-01-28 10:15:47,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 267 [2023-01-28 10:15:47,508 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 109.72727272727273) internal successors, (1207), 11 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:47,509 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:47,509 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 267 [2023-01-28 10:15:47,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:47,614 INFO L130 PetriNetUnfolder]: 98/190 cut-off events. [2023-01-28 10:15:47,614 INFO L131 PetriNetUnfolder]: For 70/73 co-relation queries the response was YES. [2023-01-28 10:15:47,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 190 events. 98/190 cut-off events. For 70/73 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 596 event pairs, 9 based on Foata normal form. 10/197 useless extension candidates. Maximal degree in co-relation 468. Up to 39 conditions per place. [2023-01-28 10:15:47,615 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 21 selfloop transitions, 6 changer transitions 25/53 dead transitions. [2023-01-28 10:15:47,615 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 270 flow [2023-01-28 10:15:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 10:15:47,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 10:15:47,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 900 transitions. [2023-01-28 10:15:47,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42134831460674155 [2023-01-28 10:15:47,617 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 900 transitions. [2023-01-28 10:15:47,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 900 transitions. [2023-01-28 10:15:47,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:15:47,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 900 transitions. [2023-01-28 10:15:47,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 112.5) internal successors, (900), 8 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:47,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:47,623 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 267.0) internal successors, (2403), 9 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:47,623 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 91 flow. Second operand 8 states and 900 transitions. [2023-01-28 10:15:47,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 270 flow [2023-01-28 10:15:47,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 262 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 10:15:47,626 INFO L231 Difference]: Finished difference. Result has 35 places, 21 transitions, 86 flow [2023-01-28 10:15:47,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=86, PETRI_PLACES=35, PETRI_TRANSITIONS=21} [2023-01-28 10:15:47,627 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 13 predicate places. [2023-01-28 10:15:47,627 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 21 transitions, 86 flow [2023-01-28 10:15:47,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 109.72727272727273) internal successors, (1207), 11 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:47,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:15:47,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:15:47,638 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 10:15:47,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:47,834 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 10:15:47,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:15:47,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1764708894, now seen corresponding path program 2 times [2023-01-28 10:15:47,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:15:47,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878219516] [2023-01-28 10:15:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:15:47,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:15:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:15:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:15:48,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:15:48,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878219516] [2023-01-28 10:15:48,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878219516] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:15:48,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289912580] [2023-01-28 10:15:48,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:15:48,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:15:48,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:15:48,428 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 10:15:48,458 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 10:15:48,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:15:48,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:15:48,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 10:15:48,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:15:48,559 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 10:15:48,592 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 10:15:48,626 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 10:15:48,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:15:48,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:15:49,375 WARN L839 $PredicateComparison]: unable to prove that (or (let ((.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_102 (Array Int Int)) (v_ArrVal_103 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_102) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ (select .cse0 .cse1) c_~sum~0) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_102 (Array Int Int)) (v_ArrVal_103 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_102) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_103) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= 0 (+ (select .cse3 .cse1) c_~sum~0)) (not (= (select .cse3 .cse2) 1))))))) (<= c_~n~0 c_~back~0) (<= (+ c_~back~0 1) c_~front~0) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-01-28 10:15:49,404 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:49,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-01-28 10:15:49,412 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:49,412 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 148 treesize of output 140 [2023-01-28 10:15:49,421 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:49,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 116 [2023-01-28 10:15:49,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:49,430 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 83 treesize of output 79 [2023-01-28 10:15:49,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:15:49,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-01-28 10:15:49,665 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:15:49,665 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 316 treesize of output 288 [2023-01-28 10:15:49,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:15:49,683 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-01-28 10:15:49,693 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:15:49,693 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 95 treesize of output 75 [2023-01-28 10:15:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-01-28 10:15:49,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289912580] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:15:49,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:15:49,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-01-28 10:15:49,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82459872] [2023-01-28 10:15:49,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:15:49,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 10:15:49,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:15:49,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 10:15:49,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=526, Unknown=2, NotChecked=48, Total=702 [2023-01-28 10:15:49,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-28 10:15:49,786 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 21 transitions, 86 flow. Second operand has 27 states, 27 states have (on average 67.81481481481481) internal successors, (1831), 27 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:15:49,786 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:15:49,787 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-28 10:15:49,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:15:58,464 WARN L222 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 55 DAG size of output: 47 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:16:04,706 WARN L222 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 57 DAG size of output: 49 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:16:10,214 INFO L130 PetriNetUnfolder]: 375/677 cut-off events. [2023-01-28 10:16:10,215 INFO L131 PetriNetUnfolder]: For 438/438 co-relation queries the response was YES. [2023-01-28 10:16:10,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2009 conditions, 677 events. 375/677 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2943 event pairs, 12 based on Foata normal form. 17/690 useless extension candidates. Maximal degree in co-relation 1249. Up to 140 conditions per place. [2023-01-28 10:16:10,218 INFO L137 encePairwiseOnDemand]: 256/267 looper letters, 113 selfloop transitions, 65 changer transitions 43/221 dead transitions. [2023-01-28 10:16:10,218 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 221 transitions, 1263 flow [2023-01-28 10:16:10,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-28 10:16:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-28 10:16:10,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3263 transitions. [2023-01-28 10:16:10,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26567334310372903 [2023-01-28 10:16:10,226 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3263 transitions. [2023-01-28 10:16:10,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3263 transitions. [2023-01-28 10:16:10,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:10,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3263 transitions. [2023-01-28 10:16:10,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 70.93478260869566) internal successors, (3263), 46 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:10,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 267.0) internal successors, (12549), 47 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:10,242 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 267.0) internal successors, (12549), 47 states have internal predecessors, (12549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:10,242 INFO L175 Difference]: Start difference. First operand has 35 places, 21 transitions, 86 flow. Second operand 46 states and 3263 transitions. [2023-01-28 10:16:10,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 221 transitions, 1263 flow [2023-01-28 10:16:10,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 221 transitions, 1077 flow, removed 48 selfloop flow, removed 5 redundant places. [2023-01-28 10:16:10,246 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 561 flow [2023-01-28 10:16:10,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=561, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2023-01-28 10:16:10,247 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 58 predicate places. [2023-01-28 10:16:10,247 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 561 flow [2023-01-28 10:16:10,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 67.81481481481481) internal successors, (1831), 27 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:10,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:10,248 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:16:10,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-01-28 10:16:10,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:10,454 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 10:16:10,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1161701845, now seen corresponding path program 3 times [2023-01-28 10:16:10,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:10,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751288721] [2023-01-28 10:16:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:10,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:10,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:10,601 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 10:16:10,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:10,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751288721] [2023-01-28 10:16:10,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751288721] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:10,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885542572] [2023-01-28 10:16:10,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:16:10,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:10,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:10,604 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 10:16:10,606 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 10:16:10,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:16:10,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:10,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 10:16:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:10,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:10,747 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 27 treesize of output 9 [2023-01-28 10:16:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:10,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:11,127 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:16:11,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 183 [2023-01-28 10:16:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:11,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885542572] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:11,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:11,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2023-01-28 10:16:11,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939902485] [2023-01-28 10:16:11,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:11,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:16:11,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:11,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:16:11,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:16:11,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 267 [2023-01-28 10:16:11,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 561 flow. Second operand has 17 states, 17 states have (on average 92.88235294117646) internal successors, (1579), 17 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:11,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:11,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 267 [2023-01-28 10:16:11,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:11,890 INFO L130 PetriNetUnfolder]: 855/1488 cut-off events. [2023-01-28 10:16:11,890 INFO L131 PetriNetUnfolder]: For 792/792 co-relation queries the response was YES. [2023-01-28 10:16:11,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4611 conditions, 1488 events. 855/1488 cut-off events. For 792/792 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7401 event pairs, 26 based on Foata normal form. 0/1446 useless extension candidates. Maximal degree in co-relation 4515. Up to 302 conditions per place. [2023-01-28 10:16:11,896 INFO L137 encePairwiseOnDemand]: 260/267 looper letters, 163 selfloop transitions, 188 changer transitions 1/352 dead transitions. [2023-01-28 10:16:11,896 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 352 transitions, 2457 flow [2023-01-28 10:16:11,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 10:16:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 10:16:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3153 transitions. [2023-01-28 10:16:11,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3578481443649983 [2023-01-28 10:16:11,903 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3153 transitions. [2023-01-28 10:16:11,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3153 transitions. [2023-01-28 10:16:11,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:11,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3153 transitions. [2023-01-28 10:16:11,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 95.54545454545455) internal successors, (3153), 33 states have internal predecessors, (3153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:11,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:11,916 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 267.0) internal successors, (9078), 34 states have internal predecessors, (9078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:11,916 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 561 flow. Second operand 33 states and 3153 transitions. [2023-01-28 10:16:11,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 352 transitions, 2457 flow [2023-01-28 10:16:11,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 352 transitions, 2080 flow, removed 182 selfloop flow, removed 7 redundant places. [2023-01-28 10:16:11,924 INFO L231 Difference]: Finished difference. Result has 109 places, 253 transitions, 1649 flow [2023-01-28 10:16:11,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1649, PETRI_PLACES=109, PETRI_TRANSITIONS=253} [2023-01-28 10:16:11,925 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 87 predicate places. [2023-01-28 10:16:11,925 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 253 transitions, 1649 flow [2023-01-28 10:16:11,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 92.88235294117646) internal successors, (1579), 17 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:11,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:11,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:16:11,930 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 10:16:12,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:12,130 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 10:16:12,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:12,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1509252043, now seen corresponding path program 4 times [2023-01-28 10:16:12,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:12,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860617704] [2023-01-28 10:16:12,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:12,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:16:12,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:12,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860617704] [2023-01-28 10:16:12,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860617704] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:12,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080154552] [2023-01-28 10:16:12,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:16:12,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:12,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:12,238 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 10:16:12,240 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 10:16:12,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:16:12,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:12,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 10:16:12,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:16:12,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:12,630 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 10:16:12,631 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 211 treesize of output 163 [2023-01-28 10:16:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 10:16:12,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080154552] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:12,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:12,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 10:16:12,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733202225] [2023-01-28 10:16:12,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:12,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 10:16:12,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:12,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 10:16:12,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:16:12,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 267 [2023-01-28 10:16:12,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 253 transitions, 1649 flow. Second operand has 12 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:12,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:12,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 267 [2023-01-28 10:16:12,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:12,861 INFO L130 PetriNetUnfolder]: 553/996 cut-off events. [2023-01-28 10:16:12,861 INFO L131 PetriNetUnfolder]: For 529/529 co-relation queries the response was YES. [2023-01-28 10:16:12,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3376 conditions, 996 events. 553/996 cut-off events. For 529/529 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 4514 event pairs, 286 based on Foata normal form. 22/989 useless extension candidates. Maximal degree in co-relation 3301. Up to 894 conditions per place. [2023-01-28 10:16:12,866 INFO L137 encePairwiseOnDemand]: 263/267 looper letters, 176 selfloop transitions, 5 changer transitions 1/182 dead transitions. [2023-01-28 10:16:12,866 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 182 transitions, 1507 flow [2023-01-28 10:16:12,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 10:16:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 10:16:12,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 555 transitions. [2023-01-28 10:16:12,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3464419475655431 [2023-01-28 10:16:12,868 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 555 transitions. [2023-01-28 10:16:12,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 555 transitions. [2023-01-28 10:16:12,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:12,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 555 transitions. [2023-01-28 10:16:12,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.5) internal successors, (555), 6 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:12,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 267.0) internal successors, (1869), 7 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:12,871 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 267.0) internal successors, (1869), 7 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:12,871 INFO L175 Difference]: Start difference. First operand has 109 places, 253 transitions, 1649 flow. Second operand 6 states and 555 transitions. [2023-01-28 10:16:12,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 182 transitions, 1507 flow [2023-01-28 10:16:12,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 182 transitions, 1354 flow, removed 50 selfloop flow, removed 10 redundant places. [2023-01-28 10:16:12,877 INFO L231 Difference]: Finished difference. Result has 90 places, 171 transitions, 970 flow [2023-01-28 10:16:12,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=970, PETRI_PLACES=90, PETRI_TRANSITIONS=171} [2023-01-28 10:16:12,878 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 68 predicate places. [2023-01-28 10:16:12,878 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 171 transitions, 970 flow [2023-01-28 10:16:12,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.41666666666667) internal successors, (1061), 12 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:12,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:12,878 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:16:12,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 10:16:13,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:13,083 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 10:16:13,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:13,083 INFO L85 PathProgramCache]: Analyzing trace with hash 655996225, now seen corresponding path program 5 times [2023-01-28 10:16:13,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:13,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232322020] [2023-01-28 10:16:13,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:13,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:16:13,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:13,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232322020] [2023-01-28 10:16:13,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232322020] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:13,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059621307] [2023-01-28 10:16:13,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:16:13,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:13,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:13,839 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 10:16:13,840 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 10:16:13,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:16:13,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:13,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 31 conjunts are in the unsatisfiable core [2023-01-28 10:16:13,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:14,135 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 10:16:14,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:14,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:14,385 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 186 treesize of output 146 [2023-01-28 10:16:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 10:16:14,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059621307] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:14,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:14,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 23 [2023-01-28 10:16:14,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132991562] [2023-01-28 10:16:14,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:14,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 10:16:14,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:14,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 10:16:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2023-01-28 10:16:14,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-28 10:16:14,683 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 171 transitions, 970 flow. Second operand has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:14,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:14,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-28 10:16:14,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:15,789 INFO L130 PetriNetUnfolder]: 1047/1843 cut-off events. [2023-01-28 10:16:15,790 INFO L131 PetriNetUnfolder]: For 660/660 co-relation queries the response was YES. [2023-01-28 10:16:15,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5783 conditions, 1843 events. 1047/1843 cut-off events. For 660/660 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9631 event pairs, 39 based on Foata normal form. 7/1788 useless extension candidates. Maximal degree in co-relation 5456. Up to 461 conditions per place. [2023-01-28 10:16:15,797 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 243 selfloop transitions, 133 changer transitions 28/404 dead transitions. [2023-01-28 10:16:15,797 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 404 transitions, 2874 flow [2023-01-28 10:16:15,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 10:16:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 10:16:15,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2874 transitions. [2023-01-28 10:16:15,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29092013361676283 [2023-01-28 10:16:15,803 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2874 transitions. [2023-01-28 10:16:15,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2874 transitions. [2023-01-28 10:16:15,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:15,804 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2874 transitions. [2023-01-28 10:16:15,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 77.67567567567568) internal successors, (2874), 37 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:15,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:15,817 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 267.0) internal successors, (10146), 38 states have internal predecessors, (10146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:15,817 INFO L175 Difference]: Start difference. First operand has 90 places, 171 transitions, 970 flow. Second operand 37 states and 2874 transitions. [2023-01-28 10:16:15,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 404 transitions, 2874 flow [2023-01-28 10:16:15,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 404 transitions, 2865 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 10:16:15,826 INFO L231 Difference]: Finished difference. Result has 131 places, 246 transitions, 1858 flow [2023-01-28 10:16:15,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=961, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1858, PETRI_PLACES=131, PETRI_TRANSITIONS=246} [2023-01-28 10:16:15,828 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 109 predicate places. [2023-01-28 10:16:15,828 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 246 transitions, 1858 flow [2023-01-28 10:16:15,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 75.16) internal successors, (1879), 25 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:15,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:15,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:16:15,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 10:16:16,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:16,033 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 10:16:16,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:16,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1631762424, now seen corresponding path program 6 times [2023-01-28 10:16:16,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:16,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674528753] [2023-01-28 10:16:16,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:16,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:16,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:16,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:16,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674528753] [2023-01-28 10:16:16,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674528753] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:16,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260404685] [2023-01-28 10:16:16,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:16:16,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:16,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:16,143 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 10:16:16,144 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 10:16:16,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 10:16:16,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:16,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 10:16:16,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:16,427 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 148 treesize of output 116 [2023-01-28 10:16:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:16:16,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:16,586 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 4 [2023-01-28 10:16:16,589 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-01-28 10:16:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 10:16:16,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260404685] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:16,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:16,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-01-28 10:16:16,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495358574] [2023-01-28 10:16:16,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:16,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:16:16,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:16,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:16:16,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:16:16,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 267 [2023-01-28 10:16:16,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 246 transitions, 1858 flow. Second operand has 15 states, 15 states have (on average 95.06666666666666) internal successors, (1426), 15 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:16,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:16,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 267 [2023-01-28 10:16:16,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:16,914 INFO L130 PetriNetUnfolder]: 922/1624 cut-off events. [2023-01-28 10:16:16,915 INFO L131 PetriNetUnfolder]: For 1498/1498 co-relation queries the response was YES. [2023-01-28 10:16:16,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5896 conditions, 1624 events. 922/1624 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8154 event pairs, 159 based on Foata normal form. 20/1636 useless extension candidates. Maximal degree in co-relation 4971. Up to 1339 conditions per place. [2023-01-28 10:16:16,922 INFO L137 encePairwiseOnDemand]: 261/267 looper letters, 207 selfloop transitions, 33 changer transitions 16/260 dead transitions. [2023-01-28 10:16:16,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 260 transitions, 2344 flow [2023-01-28 10:16:16,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:16:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:16:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 977 transitions. [2023-01-28 10:16:16,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3659176029962547 [2023-01-28 10:16:16,924 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 977 transitions. [2023-01-28 10:16:16,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 977 transitions. [2023-01-28 10:16:16,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:16,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 977 transitions. [2023-01-28 10:16:16,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 97.7) internal successors, (977), 10 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:16,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:16,927 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 267.0) internal successors, (2937), 11 states have internal predecessors, (2937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:16,927 INFO L175 Difference]: Start difference. First operand has 131 places, 246 transitions, 1858 flow. Second operand 10 states and 977 transitions. [2023-01-28 10:16:16,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 260 transitions, 2344 flow [2023-01-28 10:16:16,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 260 transitions, 2218 flow, removed 38 selfloop flow, removed 9 redundant places. [2023-01-28 10:16:16,937 INFO L231 Difference]: Finished difference. Result has 129 places, 228 transitions, 1706 flow [2023-01-28 10:16:16,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1586, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1706, PETRI_PLACES=129, PETRI_TRANSITIONS=228} [2023-01-28 10:16:16,937 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 107 predicate places. [2023-01-28 10:16:16,937 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 228 transitions, 1706 flow [2023-01-28 10:16:16,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 95.06666666666666) internal successors, (1426), 15 states have internal predecessors, (1426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:16,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:16,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:16:16,943 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 10:16:17,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:17,143 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 10:16:17,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:17,144 INFO L85 PathProgramCache]: Analyzing trace with hash 398771022, now seen corresponding path program 7 times [2023-01-28 10:16:17,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:17,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872407155] [2023-01-28 10:16:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:17,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:17,749 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 10:16:17,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:17,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872407155] [2023-01-28 10:16:17,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872407155] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:17,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600538257] [2023-01-28 10:16:17,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:16:17,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:17,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:17,751 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:16:17,757 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 10:16:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:17,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 10:16:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:18,095 INFO L321 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2023-01-28 10:16:18,096 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 10:16:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:16:18,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:18,674 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-01-28 10:16:18,674 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 258 treesize of output 204 [2023-01-28 10:16:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:19,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600538257] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:19,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:19,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 30 [2023-01-28 10:16:19,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913785880] [2023-01-28 10:16:19,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:19,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 10:16:19,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:19,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 10:16:19,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2023-01-28 10:16:19,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-28 10:16:19,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 228 transitions, 1706 flow. Second operand has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:19,089 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:19,089 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-28 10:16:19,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:20,977 INFO L130 PetriNetUnfolder]: 2207/3813 cut-off events. [2023-01-28 10:16:20,977 INFO L131 PetriNetUnfolder]: For 3501/3501 co-relation queries the response was YES. [2023-01-28 10:16:20,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13509 conditions, 3813 events. 2207/3813 cut-off events. For 3501/3501 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22857 event pairs, 56 based on Foata normal form. 36/3849 useless extension candidates. Maximal degree in co-relation 12496. Up to 1073 conditions per place. [2023-01-28 10:16:20,994 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 319 selfloop transitions, 307 changer transitions 82/708 dead transitions. [2023-01-28 10:16:20,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 708 transitions, 6036 flow [2023-01-28 10:16:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-28 10:16:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-28 10:16:20,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3943 transitions. [2023-01-28 10:16:20,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2895645149445546 [2023-01-28 10:16:20,999 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3943 transitions. [2023-01-28 10:16:20,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3943 transitions. [2023-01-28 10:16:20,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:20,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3943 transitions. [2023-01-28 10:16:21,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 77.31372549019608) internal successors, (3943), 51 states have internal predecessors, (3943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:21,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 267.0) internal successors, (13884), 52 states have internal predecessors, (13884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:21,013 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 267.0) internal successors, (13884), 52 states have internal predecessors, (13884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:21,013 INFO L175 Difference]: Start difference. First operand has 129 places, 228 transitions, 1706 flow. Second operand 51 states and 3943 transitions. [2023-01-28 10:16:21,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 708 transitions, 6036 flow [2023-01-28 10:16:21,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 708 transitions, 5978 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-01-28 10:16:21,036 INFO L231 Difference]: Finished difference. Result has 183 places, 414 transitions, 4002 flow [2023-01-28 10:16:21,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=4002, PETRI_PLACES=183, PETRI_TRANSITIONS=414} [2023-01-28 10:16:21,036 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 161 predicate places. [2023-01-28 10:16:21,036 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 414 transitions, 4002 flow [2023-01-28 10:16:21,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:21,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:21,037 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:16:21,043 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 10:16:21,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:21,242 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 10:16:21,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:21,242 INFO L85 PathProgramCache]: Analyzing trace with hash 365335128, now seen corresponding path program 8 times [2023-01-28 10:16:21,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:21,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823759890] [2023-01-28 10:16:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:21,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:21,968 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 10:16:21,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:21,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823759890] [2023-01-28 10:16:21,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823759890] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:21,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129237139] [2023-01-28 10:16:21,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:16:21,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:21,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:21,969 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 10:16:22,009 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 10:16:22,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:16:22,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:22,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2023-01-28 10:16:22,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:22,359 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2023-01-28 10:16:22,359 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 10:16:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:16:22,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:22,923 INFO L321 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-01-28 10:16:22,924 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 258 treesize of output 204 [2023-01-28 10:16:23,206 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:16:23,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129237139] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:23,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:23,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 30 [2023-01-28 10:16:23,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249440869] [2023-01-28 10:16:23,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:23,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 10:16:23,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:23,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 10:16:23,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2023-01-28 10:16:23,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-28 10:16:23,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 414 transitions, 4002 flow. Second operand has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:23,210 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:23,210 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-28 10:16:23,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:25,466 INFO L130 PetriNetUnfolder]: 3555/6063 cut-off events. [2023-01-28 10:16:25,467 INFO L131 PetriNetUnfolder]: For 11568/11568 co-relation queries the response was YES. [2023-01-28 10:16:25,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24993 conditions, 6063 events. 3555/6063 cut-off events. For 11568/11568 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 39781 event pairs, 80 based on Foata normal form. 34/6097 useless extension candidates. Maximal degree in co-relation 24895. Up to 2075 conditions per place. [2023-01-28 10:16:25,502 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 313 selfloop transitions, 466 changer transitions 78/857 dead transitions. [2023-01-28 10:16:25,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 857 transitions, 9113 flow [2023-01-28 10:16:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 10:16:25,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 10:16:25,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 3403 transitions. [2023-01-28 10:16:25,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2896663261831801 [2023-01-28 10:16:25,506 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 3403 transitions. [2023-01-28 10:16:25,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 3403 transitions. [2023-01-28 10:16:25,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:25,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 3403 transitions. [2023-01-28 10:16:25,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 77.3409090909091) internal successors, (3403), 44 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:25,517 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 267.0) internal successors, (12015), 45 states have internal predecessors, (12015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:25,518 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 267.0) internal successors, (12015), 45 states have internal predecessors, (12015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:25,518 INFO L175 Difference]: Start difference. First operand has 183 places, 414 transitions, 4002 flow. Second operand 44 states and 3403 transitions. [2023-01-28 10:16:25,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 857 transitions, 9113 flow [2023-01-28 10:16:25,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 857 transitions, 8808 flow, removed 96 selfloop flow, removed 14 redundant places. [2023-01-28 10:16:25,695 INFO L231 Difference]: Finished difference. Result has 219 places, 611 transitions, 7052 flow [2023-01-28 10:16:25,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=3777, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=7052, PETRI_PLACES=219, PETRI_TRANSITIONS=611} [2023-01-28 10:16:25,696 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 197 predicate places. [2023-01-28 10:16:25,696 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 611 transitions, 7052 flow [2023-01-28 10:16:25,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 74.90625) internal successors, (2397), 32 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:25,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:25,697 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:16:25,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-01-28 10:16:25,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 10:16:25,901 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 10:16:25,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash -27716245, now seen corresponding path program 9 times [2023-01-28 10:16:25,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:25,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083824785] [2023-01-28 10:16:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:25,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:25,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:16:26,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:26,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083824785] [2023-01-28 10:16:26,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083824785] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:26,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460615501] [2023-01-28 10:16:26,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:16:26,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:26,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:27,000 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 10:16:27,005 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 10:16:27,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:16:27,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:27,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 10:16:27,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:27,370 INFO L321 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2023-01-28 10:16:27,370 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 50 treesize of output 21 [2023-01-28 10:16:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 10:16:27,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:27,919 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-01-28 10:16:27,920 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 268 treesize of output 222 [2023-01-28 10:16:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 10:16:28,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460615501] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:28,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:28,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 33 [2023-01-28 10:16:28,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625598905] [2023-01-28 10:16:28,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:28,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 10:16:28,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:28,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 10:16:28,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 10:16:28,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-28 10:16:28,237 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 611 transitions, 7052 flow. Second operand has 35 states, 35 states have (on average 67.8) internal successors, (2373), 35 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:28,237 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:28,237 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-28 10:16:28,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:32,087 INFO L130 PetriNetUnfolder]: 6085/10306 cut-off events. [2023-01-28 10:16:32,087 INFO L131 PetriNetUnfolder]: For 31892/31892 co-relation queries the response was YES. [2023-01-28 10:16:32,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47509 conditions, 10306 events. 6085/10306 cut-off events. For 31892/31892 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 72815 event pairs, 224 based on Foata normal form. 59/10365 useless extension candidates. Maximal degree in co-relation 47403. Up to 3997 conditions per place. [2023-01-28 10:16:32,146 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 447 selfloop transitions, 808 changer transitions 98/1353 dead transitions. [2023-01-28 10:16:32,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 1353 transitions, 16882 flow [2023-01-28 10:16:32,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-01-28 10:16:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-01-28 10:16:32,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 4721 transitions. [2023-01-28 10:16:32,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26390519313544636 [2023-01-28 10:16:32,151 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 4721 transitions. [2023-01-28 10:16:32,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 4721 transitions. [2023-01-28 10:16:32,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:32,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 4721 transitions. [2023-01-28 10:16:32,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 70.46268656716418) internal successors, (4721), 67 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:32,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 267.0) internal successors, (18156), 68 states have internal predecessors, (18156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:32,185 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 267.0) internal successors, (18156), 68 states have internal predecessors, (18156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:32,185 INFO L175 Difference]: Start difference. First operand has 219 places, 611 transitions, 7052 flow. Second operand 67 states and 4721 transitions. [2023-01-28 10:16:32,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 1353 transitions, 16882 flow [2023-01-28 10:16:32,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 1353 transitions, 16410 flow, removed 153 selfloop flow, removed 25 redundant places. [2023-01-28 10:16:32,714 INFO L231 Difference]: Finished difference. Result has 280 places, 1000 transitions, 13853 flow [2023-01-28 10:16:32,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=13853, PETRI_PLACES=280, PETRI_TRANSITIONS=1000} [2023-01-28 10:16:32,714 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 258 predicate places. [2023-01-28 10:16:32,715 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 1000 transitions, 13853 flow [2023-01-28 10:16:32,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 67.8) internal successors, (2373), 35 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:32,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:32,715 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:16:32,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-01-28 10:16:32,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:32,920 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 10:16:32,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:32,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1001792257, now seen corresponding path program 10 times [2023-01-28 10:16:32,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:32,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293000777] [2023-01-28 10:16:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:32,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 10:16:33,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:33,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293000777] [2023-01-28 10:16:33,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293000777] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:33,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39747416] [2023-01-28 10:16:33,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:16:33,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:33,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:33,128 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 10:16:33,157 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 10:16:33,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:16:33,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:33,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 9 conjunts are in the unsatisfiable core [2023-01-28 10:16:33,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 10:16:33,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:34,019 INFO L321 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-01-28 10:16:34,019 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 243 treesize of output 177 [2023-01-28 10:16:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 10:16:34,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39747416] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:34,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:34,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-01-28 10:16:34,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416508626] [2023-01-28 10:16:34,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:34,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:16:34,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:34,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:16:34,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:16:34,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 267 [2023-01-28 10:16:34,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 1000 transitions, 13853 flow. Second operand has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:34,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:34,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 267 [2023-01-28 10:16:34,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:16:35,755 INFO L130 PetriNetUnfolder]: 5107/8641 cut-off events. [2023-01-28 10:16:35,756 INFO L131 PetriNetUnfolder]: For 42320/42320 co-relation queries the response was YES. [2023-01-28 10:16:35,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44976 conditions, 8641 events. 5107/8641 cut-off events. For 42320/42320 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 58938 event pairs, 2540 based on Foata normal form. 30/8671 useless extension candidates. Maximal degree in co-relation 44890. Up to 8486 conditions per place. [2023-01-28 10:16:35,817 INFO L137 encePairwiseOnDemand]: 262/267 looper letters, 867 selfloop transitions, 4 changer transitions 31/902 dead transitions. [2023-01-28 10:16:35,817 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 902 transitions, 14252 flow [2023-01-28 10:16:35,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 10:16:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 10:16:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 816 transitions. [2023-01-28 10:16:35,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33957553058676654 [2023-01-28 10:16:35,819 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 816 transitions. [2023-01-28 10:16:35,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 816 transitions. [2023-01-28 10:16:35,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:16:35,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 816 transitions. [2023-01-28 10:16:35,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 90.66666666666667) internal successors, (816), 9 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:35,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:35,821 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:35,821 INFO L175 Difference]: Start difference. First operand has 280 places, 1000 transitions, 13853 flow. Second operand 9 states and 816 transitions. [2023-01-28 10:16:35,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 902 transitions, 14252 flow [2023-01-28 10:16:36,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 902 transitions, 13737 flow, removed 156 selfloop flow, removed 23 redundant places. [2023-01-28 10:16:36,663 INFO L231 Difference]: Finished difference. Result has 259 places, 871 transitions, 11681 flow [2023-01-28 10:16:36,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11870, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=886, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11681, PETRI_PLACES=259, PETRI_TRANSITIONS=871} [2023-01-28 10:16:36,665 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 237 predicate places. [2023-01-28 10:16:36,665 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 871 transitions, 11681 flow [2023-01-28 10:16:36,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 88.0) internal successors, (1672), 19 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:36,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:16:36,665 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:16:36,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-01-28 10:16:36,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 10:16:36,870 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 10:16:36,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:16:36,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1446606786, now seen corresponding path program 11 times [2023-01-28 10:16:36,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:16:36,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419370296] [2023-01-28 10:16:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:16:36,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:16:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:16:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:16:38,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:16:38,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419370296] [2023-01-28 10:16:38,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419370296] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:16:38,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276968244] [2023-01-28 10:16:38,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:16:38,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:16:38,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:16:38,306 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 10:16:38,308 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 10:16:38,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 10:16:38,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:16:38,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 65 conjunts are in the unsatisfiable core [2023-01-28 10:16:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:16:38,505 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 10:16:38,545 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 10:16:38,576 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 10:16:39,262 INFO L321 Elim1Store]: treesize reduction 77, result has 11.5 percent of original size [2023-01-28 10:16:39,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 29 [2023-01-28 10:16:39,319 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:16:39,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:16:41,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:41,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-01-28 10:16:41,886 INFO L321 Elim1Store]: treesize reduction 26, result has 70.1 percent of original size [2023-01-28 10:16:41,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 748 [2023-01-28 10:16:41,907 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:41,911 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:41,912 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:16:41,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:41,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 276 [2023-01-28 10:16:41,997 INFO L321 Elim1Store]: treesize reduction 26, result has 70.1 percent of original size [2023-01-28 10:16:41,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 235 [2023-01-28 10:16:43,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:16:43,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-01-28 10:16:43,420 INFO L321 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-01-28 10:16:43,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 336 [2023-01-28 10:16:43,460 INFO L321 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-01-28 10:16:43,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 256 [2023-01-28 10:16:43,495 INFO L321 Elim1Store]: treesize reduction 74, result has 14.9 percent of original size [2023-01-28 10:16:43,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 187 [2023-01-28 10:16:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:16:43,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276968244] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:16:43,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:16:43,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2023-01-28 10:16:43,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77433872] [2023-01-28 10:16:43,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:16:43,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-01-28 10:16:43,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:16:43,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-01-28 10:16:43,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2022, Unknown=5, NotChecked=0, Total=2256 [2023-01-28 10:16:43,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-28 10:16:43,846 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 871 transitions, 11681 flow. Second operand has 48 states, 48 states have (on average 67.52083333333333) internal successors, (3241), 48 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:16:43,846 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:16:43,846 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-28 10:16:43,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:18:15,569 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 10:18:22,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:18:37,864 WARN L539 Checker$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 10:18:39,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:18:41,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:18:47,980 WARN L222 SmtUtils]: Spent 5.98s on a formula simplification. DAG size of input: 128 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:18:57,271 WARN L222 SmtUtils]: Spent 5.66s on a formula simplification. DAG size of input: 97 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:19:34,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:19:35,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:19:37,595 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:19:54,606 WARN L222 SmtUtils]: Spent 5.75s on a formula simplification. DAG size of input: 100 DAG size of output: 87 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:20:24,963 WARN L539 Checker$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 10:20:31,693 WARN L222 SmtUtils]: Spent 6.51s on a formula simplification. DAG size of input: 82 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:20:46,674 WARN L222 SmtUtils]: Spent 5.32s on a formula simplification. DAG size of input: 130 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:21:01,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:21:04,127 WARN L539 Checker$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 10:21:12,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:21:14,449 WARN L539 Checker$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 10:21:26,537 WARN L222 SmtUtils]: Spent 7.71s on a formula simplification. DAG size of input: 100 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:21:39,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 10:22:30,292 WARN L222 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 127 DAG size of output: 69 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 10:23:19,403 WARN L539 Checker$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 10:24:10,703 INFO L130 PetriNetUnfolder]: 19539/33571 cut-off events. [2023-01-28 10:24:10,704 INFO L131 PetriNetUnfolder]: For 155025/155025 co-relation queries the response was YES. [2023-01-28 10:24:10,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162289 conditions, 33571 events. 19539/33571 cut-off events. For 155025/155025 co-relation queries the response was YES. Maximal size of possible extension queue 1123. Compared 264555 event pairs, 812 based on Foata normal form. 777/34348 useless extension candidates. Maximal degree in co-relation 162214. Up to 12049 conditions per place. [2023-01-28 10:24:10,993 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 2361 selfloop transitions, 3243 changer transitions 706/6310 dead transitions. [2023-01-28 10:24:10,993 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 6310 transitions, 72983 flow [2023-01-28 10:24:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 527 states. [2023-01-28 10:24:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2023-01-28 10:24:11,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 37728 transitions. [2023-01-28 10:24:11,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2681278383045861 [2023-01-28 10:24:11,023 INFO L72 ComplementDD]: Start complementDD. Operand 527 states and 37728 transitions. [2023-01-28 10:24:11,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 527 states and 37728 transitions. [2023-01-28 10:24:11,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:24:11,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 527 states and 37728 transitions. [2023-01-28 10:24:11,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 528 states, 527 states have (on average 71.59013282732448) internal successors, (37728), 527 states have internal predecessors, (37728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:24:11,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 528 states, 528 states have (on average 267.0) internal successors, (140976), 528 states have internal predecessors, (140976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:24:11,175 INFO L81 ComplementDD]: Finished complementDD. Result has 528 states, 528 states have (on average 267.0) internal successors, (140976), 528 states have internal predecessors, (140976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:24:11,175 INFO L175 Difference]: Start difference. First operand has 259 places, 871 transitions, 11681 flow. Second operand 527 states and 37728 transitions. [2023-01-28 10:24:11,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 6310 transitions, 72983 flow [2023-01-28 10:24:13,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 739 places, 6310 transitions, 72675 flow, removed 97 selfloop flow, removed 25 redundant places. [2023-01-28 10:24:13,376 INFO L231 Difference]: Finished difference. Result has 927 places, 4249 transitions, 61806 flow [2023-01-28 10:24:13,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=11519, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=870, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=527, PETRI_FLOW=61806, PETRI_PLACES=927, PETRI_TRANSITIONS=4249} [2023-01-28 10:24:13,377 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 905 predicate places. [2023-01-28 10:24:13,377 INFO L495 AbstractCegarLoop]: Abstraction has has 927 places, 4249 transitions, 61806 flow [2023-01-28 10:24:13,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 67.52083333333333) internal successors, (3241), 48 states have internal predecessors, (3241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:24:13,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:24:13,378 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:24:13,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-01-28 10:24:13,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 10:24:13,582 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 10:24:13,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:24:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1656530734, now seen corresponding path program 12 times [2023-01-28 10:24:13,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:24:13,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727723349] [2023-01-28 10:24:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:24:13,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:24:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:24:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:24:15,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:24:15,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727723349] [2023-01-28 10:24:15,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727723349] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:24:15,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299267498] [2023-01-28 10:24:15,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:24:15,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:24:15,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:24:15,152 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 10:24:15,169 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 10:24:15,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:24:15,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:24:15,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-28 10:24:15,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:24:16,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:24:16,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 10:24:16,084 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 10:24:16,085 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:24:16,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 18 [2023-01-28 10:24:16,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:24:16,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:24:17,152 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-01-28 10:24:17,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 310 treesize of output 250 [2023-01-28 10:24:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:24:18,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299267498] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:24:18,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:24:18,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 49 [2023-01-28 10:24:18,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973763851] [2023-01-28 10:24:18,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:24:18,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-28 10:24:18,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:24:18,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-28 10:24:18,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2023-01-28 10:24:18,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 267 [2023-01-28 10:24:18,156 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 927 places, 4249 transitions, 61806 flow. Second operand has 51 states, 51 states have (on average 67.45098039215686) internal successors, (3440), 51 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:24:18,156 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:24:18,156 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 267 [2023-01-28 10:24:18,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:25:01,733 INFO L130 PetriNetUnfolder]: 28861/49641 cut-off events. [2023-01-28 10:25:01,733 INFO L131 PetriNetUnfolder]: For 1850000/1850000 co-relation queries the response was YES. [2023-01-28 10:25:03,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314041 conditions, 49641 events. 28861/49641 cut-off events. For 1850000/1850000 co-relation queries the response was YES. Maximal size of possible extension queue 1941. Compared 425116 event pairs, 1012 based on Foata normal form. 60/49701 useless extension candidates. Maximal degree in co-relation 312487. Up to 20049 conditions per place. [2023-01-28 10:25:03,949 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 3360 selfloop transitions, 4127 changer transitions 139/7626 dead transitions. [2023-01-28 10:25:03,949 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1037 places, 7626 transitions, 123756 flow [2023-01-28 10:25:03,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-01-28 10:25:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2023-01-28 10:25:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 8735 transitions. [2023-01-28 10:25:03,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26383351455841486 [2023-01-28 10:25:03,971 INFO L72 ComplementDD]: Start complementDD. Operand 124 states and 8735 transitions. [2023-01-28 10:25:03,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 124 states and 8735 transitions. [2023-01-28 10:25:03,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:25:03,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 124 states and 8735 transitions. [2023-01-28 10:25:03,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 125 states, 124 states have (on average 70.44354838709677) internal successors, (8735), 124 states have internal predecessors, (8735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:03,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 125 states, 125 states have (on average 267.0) internal successors, (33375), 125 states have internal predecessors, (33375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:03,996 INFO L81 ComplementDD]: Finished complementDD. Result has 125 states, 125 states have (on average 267.0) internal successors, (33375), 125 states have internal predecessors, (33375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:25:03,996 INFO L175 Difference]: Start difference. First operand has 927 places, 4249 transitions, 61806 flow. Second operand 124 states and 8735 transitions. [2023-01-28 10:25:03,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1037 places, 7626 transitions, 123756 flow [2023-01-28 10:26:10,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1012 places, 7626 transitions, 113476 flow, removed 5097 selfloop flow, removed 25 redundant places. [2023-01-28 10:26:10,957 INFO L231 Difference]: Finished difference. Result has 1061 places, 5940 transitions, 97333 flow [2023-01-28 10:26:10,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=56680, PETRI_DIFFERENCE_MINUEND_PLACES=889, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2565, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=124, PETRI_FLOW=97333, PETRI_PLACES=1061, PETRI_TRANSITIONS=5940} [2023-01-28 10:26:10,960 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1039 predicate places. [2023-01-28 10:26:10,960 INFO L495 AbstractCegarLoop]: Abstraction has has 1061 places, 5940 transitions, 97333 flow [2023-01-28 10:26:10,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 67.45098039215686) internal successors, (3440), 51 states have internal predecessors, (3440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:10,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:26:10,961 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:26:10,968 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 10:26:11,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 10:26:11,166 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 10:26:11,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:26:11,166 INFO L85 PathProgramCache]: Analyzing trace with hash 225616056, now seen corresponding path program 13 times [2023-01-28 10:26:11,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:26:11,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294433750] [2023-01-28 10:26:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:26:11,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:26:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:26:12,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:26:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294433750] [2023-01-28 10:26:12,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294433750] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:26:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871888159] [2023-01-28 10:26:12,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:26:12,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:26:12,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:26:12,166 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 10:26:12,167 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 10:26:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:26:12,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 56 conjunts are in the unsatisfiable core [2023-01-28 10:26:12,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:26:12,863 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:26:12,864 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 12 [2023-01-28 10:26:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:26:12,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:26:13,836 INFO L321 Elim1Store]: treesize reduction 44, result has 57.3 percent of original size [2023-01-28 10:26:13,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 310 treesize of output 250 [2023-01-28 10:26:14,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:26:14,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871888159] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:26:14,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:26:14,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 49 [2023-01-28 10:26:14,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183723623] [2023-01-28 10:26:14,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:26:14,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-01-28 10:26:14,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:26:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-01-28 10:26:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2023-01-28 10:26:14,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-28 10:26:14,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 5940 transitions, 97333 flow. Second operand has 51 states, 51 states have (on average 74.45098039215686) internal successors, (3797), 51 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:26:14,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:26:14,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-28 10:26:14,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:27:11,437 INFO L130 PetriNetUnfolder]: 31721/54578 cut-off events. [2023-01-28 10:27:11,437 INFO L131 PetriNetUnfolder]: For 2064106/2064106 co-relation queries the response was YES. [2023-01-28 10:27:13,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361404 conditions, 54578 events. 31721/54578 cut-off events. For 2064106/2064106 co-relation queries the response was YES. Maximal size of possible extension queue 1725. Compared 471184 event pairs, 1136 based on Foata normal form. 133/54711 useless extension candidates. Maximal degree in co-relation 361134. Up to 15179 conditions per place. [2023-01-28 10:27:14,183 INFO L137 encePairwiseOnDemand]: 257/267 looper letters, 3108 selfloop transitions, 4505 changer transitions 188/7801 dead transitions. [2023-01-28 10:27:14,184 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1091 places, 7801 transitions, 134521 flow [2023-01-28 10:27:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-01-28 10:27:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-01-28 10:27:14,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 6823 transitions. [2023-01-28 10:27:14,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2903898535921008 [2023-01-28 10:27:14,189 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 6823 transitions. [2023-01-28 10:27:14,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 6823 transitions. [2023-01-28 10:27:14,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:27:14,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 6823 transitions. [2023-01-28 10:27:14,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 77.5340909090909) internal successors, (6823), 88 states have internal predecessors, (6823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:27:14,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 267.0) internal successors, (23763), 89 states have internal predecessors, (23763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:27:14,205 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 267.0) internal successors, (23763), 89 states have internal predecessors, (23763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:27:14,205 INFO L175 Difference]: Start difference. First operand has 1061 places, 5940 transitions, 97333 flow. Second operand 88 states and 6823 transitions. [2023-01-28 10:27:14,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1091 places, 7801 transitions, 134521 flow [2023-01-28 10:28:40,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1031 places, 7801 transitions, 131717 flow, removed 1318 selfloop flow, removed 60 redundant places. [2023-01-28 10:28:40,784 INFO L231 Difference]: Finished difference. Result has 1061 places, 6167 transitions, 115359 flow [2023-01-28 10:28:40,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=74490, PETRI_DIFFERENCE_MINUEND_PLACES=944, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=115359, PETRI_PLACES=1061, PETRI_TRANSITIONS=6167} [2023-01-28 10:28:40,788 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1039 predicate places. [2023-01-28 10:28:40,788 INFO L495 AbstractCegarLoop]: Abstraction has has 1061 places, 6167 transitions, 115359 flow [2023-01-28 10:28:40,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 74.45098039215686) internal successors, (3797), 51 states have internal predecessors, (3797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:28:40,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:28:40,789 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:28:40,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-01-28 10:28:40,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 10:28:40,994 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 10:28:40,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:28:40,994 INFO L85 PathProgramCache]: Analyzing trace with hash 443297970, now seen corresponding path program 14 times [2023-01-28 10:28:40,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:28:40,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636136183] [2023-01-28 10:28:40,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:28:40,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:28:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:28:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:28:42,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:28:42,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636136183] [2023-01-28 10:28:42,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636136183] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:28:42,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990840699] [2023-01-28 10:28:42,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:28:42,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:28:42,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:28:42,161 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 10:28:42,164 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 10:28:42,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:28:42,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:28:42,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 59 conjunts are in the unsatisfiable core [2023-01-28 10:28:42,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:28:42,809 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:28:42,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 12 [2023-01-28 10:28:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:28:42,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:28:43,808 INFO L321 Elim1Store]: treesize reduction 28, result has 72.8 percent of original size [2023-01-28 10:28:43,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 320 treesize of output 276 [2023-01-28 10:28:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:28:45,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990840699] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:28:45,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:28:45,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 47 [2023-01-28 10:28:45,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358120582] [2023-01-28 10:28:45,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:28:45,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-01-28 10:28:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:28:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-01-28 10:28:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2023-01-28 10:28:45,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 267 [2023-01-28 10:28:45,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1061 places, 6167 transitions, 115359 flow. Second operand has 49 states, 49 states have (on average 74.48979591836735) internal successors, (3650), 49 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:28:45,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:28:45,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 267 [2023-01-28 10:28:45,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-01-28 10:29:50,129 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 10:29:50,129 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 10:29:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2023-01-28 10:29:50,430 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 10:29:50,436 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 10:29:50,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:50,634 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 73/267 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 138764 conditions, 21686 events (12644/21685 cut-off events. For 321377/321377 co-relation queries the response was YES. Maximal size of possible extension queue 1342. Compared 185140 event pairs, 471 based on Foata normal form. 48/23041 useless extension candidates. Maximal degree in co-relation 138501. Up to 6451 conditions per place.). [2023-01-28 10:29:50,635 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 10:29:50,635 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 10:29:50,636 INFO L445 BasicCegarLoop]: Path program histogram: [14, 1, 1, 1] [2023-01-28 10:29:50,638 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 10:29:50,638 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 10:29:50,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 10:29:50 BasicIcfg [2023-01-28 10:29:50,639 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 10:29:50,640 INFO L158 Benchmark]: Toolchain (without parser) took 849588.17ms. Allocated memory was 394.3MB in the beginning and 9.7GB in the end (delta: 9.3GB). Free memory was 335.8MB in the beginning and 7.9GB in the end (delta: -7.5GB). Peak memory consumption was 1.7GB. Max. memory is 16.0GB. [2023-01-28 10:29:50,640 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 394.3MB. Free memory is still 343.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 10:29:50,640 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.05ms. Allocated memory is still 394.3MB. Free memory was 335.8MB in the beginning and 324.1MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 10:29:50,640 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.38ms. Allocated memory is still 394.3MB. Free memory was 324.1MB in the beginning and 322.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:29:50,641 INFO L158 Benchmark]: Boogie Preprocessor took 31.04ms. Allocated memory is still 394.3MB. Free memory was 322.3MB in the beginning and 320.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:29:50,641 INFO L158 Benchmark]: RCFGBuilder took 361.54ms. Allocated memory was 394.3MB in the beginning and 570.4MB in the end (delta: 176.2MB). Free memory was 320.5MB in the beginning and 531.3MB in the end (delta: -210.8MB). Peak memory consumption was 22.1MB. Max. memory is 16.0GB. [2023-01-28 10:29:50,642 INFO L158 Benchmark]: TraceAbstraction took 848955.75ms. Allocated memory was 570.4MB in the beginning and 9.7GB in the end (delta: 9.1GB). Free memory was 530.5MB in the beginning and 7.9GB in the end (delta: -7.3GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2023-01-28 10:29:50,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 394.3MB. Free memory is still 343.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 197.05ms. Allocated memory is still 394.3MB. Free memory was 335.8MB in the beginning and 324.1MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 37.38ms. Allocated memory is still 394.3MB. Free memory was 324.1MB in the beginning and 322.3MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.04ms. Allocated memory is still 394.3MB. Free memory was 322.3MB in the beginning and 320.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 361.54ms. Allocated memory was 394.3MB in the beginning and 570.4MB in the end (delta: 176.2MB). Free memory was 320.5MB in the beginning and 531.3MB in the end (delta: -210.8MB). Peak memory consumption was 22.1MB. Max. memory is 16.0GB. * TraceAbstraction took 848955.75ms. Allocated memory was 570.4MB in the beginning and 9.7GB in the end (delta: 9.1GB). Free memory was 530.5MB in the beginning and 7.9GB in the end (delta: -7.3GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.7s, 121 PlacesBefore, 22 PlacesAfterwards, 125 TransitionsBefore, 19 TransitionsAfterwards, 1296 CoEnabledTransitionPairs, 7 FixpointIterations, 65 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 15 ConcurrentYvCompositions, 7 ChoiceCompositions, 132 TotalNumberOfCompositions, 1508 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1410, independent: 1392, independent conditional: 0, independent unconditional: 1392, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 762, independent: 755, independent conditional: 0, independent unconditional: 755, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1410, independent: 637, independent conditional: 0, independent unconditional: 637, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 762, unknown conditional: 0, unknown unconditional: 762] , Statistics on independence cache: Total cache size (in pairs): 28, Positive cache size: 26, Positive conditional cache size: 0, Positive unconditional cache size: 26, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 73/267 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 138764 conditions, 21686 events (12644/21685 cut-off events. For 321377/321377 co-relation queries the response was YES. Maximal size of possible extension queue 1342. Compared 185140 event pairs, 471 based on Foata normal form. 48/23041 useless extension candidates. Maximal degree in co-relation 138501. Up to 6451 conditions per place.). - 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 CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 73/267 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 138764 conditions, 21686 events (12644/21685 cut-off events. For 321377/321377 co-relation queries the response was YES. Maximal size of possible extension queue 1342. Compared 185140 event pairs, 471 based on Foata normal form. 48/23041 useless extension candidates. Maximal degree in co-relation 138501. Up to 6451 conditions per place.). - 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 CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (49states, 73/267 universal loopers) in iteration 17,while PetriNetUnfolder was constructing finite prefix that currently has 138764 conditions, 21686 events (12644/21685 cut-off events. For 321377/321377 co-relation queries the response was YES. Maximal size of possible extension queue 1342. Compared 185140 event pairs, 471 based on Foata normal form. 48/23041 useless extension candidates. Maximal degree in co-relation 138501. Up to 6451 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 161 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 848.8s, OverallIterations: 17, TraceHistogramMax: 4, PathProgramHistogramMax: 14, EmptinessCheckTime: 0.0s, AutomataDifference: 807.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.8s, HoareTripleCheckerStatistics: 28 mSolverCounterUnknown, 5541 SdHoareTripleChecker+Valid, 56.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5541 mSDsluCounter, 169 SdHoareTripleChecker+Invalid, 54.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 216 IncrementalHoareTripleChecker+Unchecked, 156 mSDsCounter, 1100 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23482 IncrementalHoareTripleChecker+Invalid, 24826 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1100 mSolverCounterUnsat, 13 mSDtfsCounter, 23482 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1905 GetRequests, 342 SyntacticMatches, 12 SemanticMatches, 1551 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 193922 ImplicationChecksByTransitivity, 482.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115359occurred in iteration=16, InterpolantAutomatonStates: 1061, 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: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 32.4s InterpolantComputationTime, 679 NumberOfCodeBlocks, 679 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 950 ConstructedInterpolants, 16 QuantifiedInterpolants, 20861 SizeOfPredicates, 359 NumberOfNonLiveVariables, 2916 ConjunctsInSsa, 491 ConjunctsInUnsatCore, 45 InterpolantComputations, 3 PerfectInterpolantSequences, 142/540 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