/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-figure3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 10:29:54,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 10:29:54,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 10:29:54,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 10:29:54,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 10:29:54,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 10:29:54,227 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 10:29:54,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 10:29:54,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 10:29:54,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 10:29:54,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 10:29:54,235 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 10:29:54,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 10:29:54,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 10:29:54,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 10:29:54,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 10:29:54,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 10:29:54,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 10:29:54,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 10:29:54,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 10:29:54,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 10:29:54,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 10:29:54,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 10:29:54,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 10:29:54,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 10:29:54,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 10:29:54,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 10:29:54,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 10:29:54,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 10:29:54,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 10:29:54,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 10:29:54,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 10:29:54,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 10:29:54,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 10:29:54,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 10:29:54,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 10:29:54,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 10:29:54,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 10:29:54,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 10:29:54,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 10:29:54,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 10:29:54,258 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 10:29:54,278 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 10:29:54,278 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 10:29:54,279 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 10:29:54,279 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 10:29:54,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 10:29:54,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 10:29:54,280 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 10:29:54,280 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 10:29:54,280 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 10:29:54,280 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 10:29:54,281 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 10:29:54,281 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 10:29:54,281 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 10:29:54,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 10:29:54,281 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 10:29:54,281 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 10:29:54,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 10:29:54,282 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 10:29:54,282 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 10:29:54,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 10:29:54,282 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 10:29:54,282 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 10:29:54,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 10:29:54,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:29:54,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 10:29:54,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 10:29:54,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 10:29:54,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 10:29:54,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 10:29:54,283 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 10:29:54,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 10:29:54,283 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 10:29:54,445 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 10:29:54,467 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 10:29:54,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 10:29:54,469 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 10:29:54,471 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 10:29:54,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-01-28 10:29:55,445 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 10:29:55,570 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 10:29:55,570 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure3.wvr.c [2023-01-28 10:29:55,574 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d81077fd2/be5d4c63638f4dc8bec2433fd0bcc3c0/FLAG544c49de2 [2023-01-28 10:29:55,583 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d81077fd2/be5d4c63638f4dc8bec2433fd0bcc3c0 [2023-01-28 10:29:55,585 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 10:29:55,586 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 10:29:55,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 10:29:55,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 10:29:55,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 10:29:55,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,590 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad72102 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55, skipping insertion in model container [2023-01-28 10:29:55,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 10:29:55,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 10:29:55,695 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-figure3.wvr.c[2121,2134] [2023-01-28 10:29:55,698 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:29:55,704 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 10:29:55,715 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-figure3.wvr.c[2121,2134] [2023-01-28 10:29:55,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 10:29:55,720 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:29:55,720 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 10:29:55,724 INFO L208 MainTranslator]: Completed translation [2023-01-28 10:29:55,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55 WrapperNode [2023-01-28 10:29:55,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 10:29:55,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 10:29:55,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 10:29:55,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 10:29:55,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,762 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2023-01-28 10:29:55,762 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 10:29:55,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 10:29:55,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 10:29:55,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 10:29:55,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,770 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,770 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,778 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,780 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 10:29:55,780 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 10:29:55,780 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 10:29:55,781 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 10:29:55,781 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (1/1) ... [2023-01-28 10:29:55,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 10:29:55,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:55,813 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 10:29:55,815 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 10:29:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 10:29:55,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 10:29:55,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 10:29:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 10:29:55,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 10:29:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 10:29:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 10:29:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 10:29:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 10:29:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 10:29:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 10:29:55,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 10:29:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 10:29:55,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 10:29:55,861 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 10:29:55,944 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 10:29:55,945 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 10:29:56,136 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 10:29:56,155 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 10:29:56,155 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 10:29:56,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:29:56 BoogieIcfgContainer [2023-01-28 10:29:56,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 10:29:56,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 10:29:56,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 10:29:56,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 10:29:56,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 10:29:55" (1/3) ... [2023-01-28 10:29:56,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4673da0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:29:56, skipping insertion in model container [2023-01-28 10:29:56,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 10:29:55" (2/3) ... [2023-01-28 10:29:56,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4673da0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 10:29:56, skipping insertion in model container [2023-01-28 10:29:56,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 10:29:56" (3/3) ... [2023-01-28 10:29:56,165 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure3.wvr.c [2023-01-28 10:29:56,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 10:29:56,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 10:29:56,176 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 10:29:56,252 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 10:29:56,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2023-01-28 10:29:56,305 INFO L130 PetriNetUnfolder]: 6/80 cut-off events. [2023-01-28 10:29:56,305 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:29:56,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-01-28 10:29:56,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2023-01-28 10:29:56,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 72 transitions, 156 flow [2023-01-28 10:29:56,313 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 10:29:56,323 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 72 transitions, 156 flow [2023-01-28 10:29:56,325 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 72 transitions, 156 flow [2023-01-28 10:29:56,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 156 flow [2023-01-28 10:29:56,340 INFO L130 PetriNetUnfolder]: 6/72 cut-off events. [2023-01-28 10:29:56,340 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:29:56,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 72 events. 6/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2023-01-28 10:29:56,341 INFO L119 LiptonReduction]: Number of co-enabled transitions 500 [2023-01-28 10:29:57,751 INFO L134 LiptonReduction]: Checked pairs total: 583 [2023-01-28 10:29:57,752 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-01-28 10:29:57,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 10:29:57,780 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;@433e367b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 10:29:57,780 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 10:29:57,785 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 10:29:57,785 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 10:29:57,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:57,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:57,786 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 10:29:57,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:57,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1436261647, now seen corresponding path program 1 times [2023-01-28 10:29:57,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:57,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056214089] [2023-01-28 10:29:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:57,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:58,157 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 10:29:58,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:58,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056214089] [2023-01-28 10:29:58,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056214089] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:29:58,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:29:58,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 10:29:58,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641881558] [2023-01-28 10:29:58,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:29:58,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 10:29:58,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:58,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 10:29:58,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 10:29:58,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 151 [2023-01-28 10:29:58,195 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,195 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:58,195 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 151 [2023-01-28 10:29:58,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:58,250 INFO L130 PetriNetUnfolder]: 49/94 cut-off events. [2023-01-28 10:29:58,250 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-01-28 10:29:58,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 94 events. 49/94 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 271 event pairs, 13 based on Foata normal form. 1/69 useless extension candidates. Maximal degree in co-relation 143. Up to 65 conditions per place. [2023-01-28 10:29:58,252 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 16 selfloop transitions, 2 changer transitions 4/24 dead transitions. [2023-01-28 10:29:58,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 113 flow [2023-01-28 10:29:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 10:29:58,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 10:29:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-01-28 10:29:58,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099337748344371 [2023-01-28 10:29:58,263 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-01-28 10:29:58,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-01-28 10:29:58,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:58,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-01-28 10:29:58,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,275 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 231 transitions. [2023-01-28 10:29:58,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 113 flow [2023-01-28 10:29:58,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 10:29:58,278 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-01-28 10:29:58,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-01-28 10:29:58,282 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-01-28 10:29:58,282 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-01-28 10:29:58,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:58,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:58,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 10:29:58,283 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 10:29:58,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:58,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1046577200, now seen corresponding path program 1 times [2023-01-28 10:29:58,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:58,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219170639] [2023-01-28 10:29:58,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:58,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:58,423 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 10:29:58,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:58,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219170639] [2023-01-28 10:29:58,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219170639] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 10:29:58,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 10:29:58,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-01-28 10:29:58,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119502838] [2023-01-28 10:29:58,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:29:58,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 10:29:58,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:58,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 10:29:58,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 10:29:58,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:29:58,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:58,436 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:29:58,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:58,539 INFO L130 PetriNetUnfolder]: 72/149 cut-off events. [2023-01-28 10:29:58,539 INFO L131 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2023-01-28 10:29:58,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 149 events. 72/149 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 459 event pairs, 24 based on Foata normal form. 6/155 useless extension candidates. Maximal degree in co-relation 177. Up to 78 conditions per place. [2023-01-28 10:29:58,541 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 28 selfloop transitions, 3 changer transitions 6/37 dead transitions. [2023-01-28 10:29:58,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 37 transitions, 178 flow [2023-01-28 10:29:58,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:29:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:29:58,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 337 transitions. [2023-01-28 10:29:58,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463576158940397 [2023-01-28 10:29:58,546 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 337 transitions. [2023-01-28 10:29:58,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 337 transitions. [2023-01-28 10:29:58,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:58,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 337 transitions. [2023-01-28 10:29:58,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.4) internal successors, (337), 5 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,552 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,552 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 337 transitions. [2023-01-28 10:29:58,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 37 transitions, 178 flow [2023-01-28 10:29:58,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 37 transitions, 175 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:29:58,554 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 74 flow [2023-01-28 10:29:58,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=74, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-01-28 10:29:58,554 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-01-28 10:29:58,554 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 74 flow [2023-01-28 10:29:58,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:58,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:58,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 10:29:58,555 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 10:29:58,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:58,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1397973902, now seen corresponding path program 2 times [2023-01-28 10:29:58,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:58,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752204171] [2023-01-28 10:29:58,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:58,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:58,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:58,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:58,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:58,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752204171] [2023-01-28 10:29:58,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752204171] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:58,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542295146] [2023-01-28 10:29:58,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:29:58,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:58,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:58,662 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 10:29:58,665 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 10:29:58,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:29:58,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:58,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:29:58,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:58,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:58,888 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 10:29:58,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542295146] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:58,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 10:29:58,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-01-28 10:29:58,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998468101] [2023-01-28 10:29:58,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 10:29:58,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 10:29:58,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:58,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 10:29:58,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:29:58,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 151 [2023-01-28 10:29:58,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:58,890 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 151 [2023-01-28 10:29:58,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:58,932 INFO L130 PetriNetUnfolder]: 72/143 cut-off events. [2023-01-28 10:29:58,932 INFO L131 PetriNetUnfolder]: For 131/135 co-relation queries the response was YES. [2023-01-28 10:29:58,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 143 events. 72/143 cut-off events. For 131/135 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 442 event pairs, 28 based on Foata normal form. 6/145 useless extension candidates. Maximal degree in co-relation 112. Up to 86 conditions per place. [2023-01-28 10:29:58,933 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 24 selfloop transitions, 3 changer transitions 5/33 dead transitions. [2023-01-28 10:29:58,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 188 flow [2023-01-28 10:29:58,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 10:29:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 10:29:58,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 283 transitions. [2023-01-28 10:29:58,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4685430463576159 [2023-01-28 10:29:58,935 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 283 transitions. [2023-01-28 10:29:58,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 283 transitions. [2023-01-28 10:29:58,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:58,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 283 transitions. [2023-01-28 10:29:58,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 70.75) internal successors, (283), 4 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,937 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,937 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 74 flow. Second operand 4 states and 283 transitions. [2023-01-28 10:29:58,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 188 flow [2023-01-28 10:29:58,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 33 transitions, 178 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-01-28 10:29:58,940 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 93 flow [2023-01-28 10:29:58,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-01-28 10:29:58,941 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-01-28 10:29:58,941 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 93 flow [2023-01-28 10:29:58,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:58,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:58,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:58,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 10:29:59,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:59,147 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 10:29:59,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1096485560, now seen corresponding path program 3 times [2023-01-28 10:29:59,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:59,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678408169] [2023-01-28 10:29:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:59,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:59,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:59,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678408169] [2023-01-28 10:29:59,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678408169] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:59,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249394419] [2023-01-28 10:29:59,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:29:59,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:59,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:59,234 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 10:29:59,236 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 10:29:59,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:29:59,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:59,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:29:59,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:59,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:59,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:59,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249394419] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:59,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:59,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-01-28 10:29:59,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321250549] [2023-01-28 10:29:59,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:59,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 10:29:59,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:59,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 10:29:59,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-28 10:29:59,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:29:59,355 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 93 flow. Second operand has 7 states, 7 states have (on average 63.142857142857146) internal successors, (442), 7 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:59,355 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:59,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:29:59,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:29:59,506 INFO L130 PetriNetUnfolder]: 102/203 cut-off events. [2023-01-28 10:29:59,506 INFO L131 PetriNetUnfolder]: For 289/289 co-relation queries the response was YES. [2023-01-28 10:29:59,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 203 events. 102/203 cut-off events. For 289/289 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 705 event pairs, 30 based on Foata normal form. 6/209 useless extension candidates. Maximal degree in co-relation 237. Up to 104 conditions per place. [2023-01-28 10:29:59,508 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 33 selfloop transitions, 11 changer transitions 11/55 dead transitions. [2023-01-28 10:29:59,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 55 transitions, 334 flow [2023-01-28 10:29:59,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:29:59,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:29:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 473 transitions. [2023-01-28 10:29:59,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4474929044465468 [2023-01-28 10:29:59,509 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 473 transitions. [2023-01-28 10:29:59,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 473 transitions. [2023-01-28 10:29:59,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:29:59,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 473 transitions. [2023-01-28 10:29:59,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.57142857142857) internal successors, (473), 7 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:59,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:59,512 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:59,512 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 93 flow. Second operand 7 states and 473 transitions. [2023-01-28 10:29:59,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 55 transitions, 334 flow [2023-01-28 10:29:59,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 332 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 10:29:59,514 INFO L231 Difference]: Finished difference. Result has 34 places, 26 transitions, 165 flow [2023-01-28 10:29:59,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=165, PETRI_PLACES=34, PETRI_TRANSITIONS=26} [2023-01-28 10:29:59,515 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-01-28 10:29:59,515 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 26 transitions, 165 flow [2023-01-28 10:29:59,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.142857142857146) internal successors, (442), 7 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:59,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:29:59,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:29:59,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 10:29:59,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-01-28 10:29:59,733 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 10:29:59,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:29:59,733 INFO L85 PathProgramCache]: Analyzing trace with hash -39967956, now seen corresponding path program 4 times [2023-01-28 10:29:59,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:29:59,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370312779] [2023-01-28 10:29:59,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:29:59,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:29:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:29:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:59,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:29:59,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370312779] [2023-01-28 10:29:59,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370312779] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:29:59,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384785144] [2023-01-28 10:29:59,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:29:59,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:29:59,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:29:59,814 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 10:29:59,826 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 10:29:59,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:29:59,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:29:59,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 10:29:59,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:29:59,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:59,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:29:59,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:29:59,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384785144] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:29:59,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:29:59,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-01-28 10:29:59,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655191980] [2023-01-28 10:29:59,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:29:59,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 10:29:59,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:29:59,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 10:29:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-01-28 10:29:59,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:29:59,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 26 transitions, 165 flow. Second operand has 8 states, 8 states have (on average 62.5) internal successors, (500), 8 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:29:59,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:29:59,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:29:59,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:00,004 INFO L130 PetriNetUnfolder]: 96/189 cut-off events. [2023-01-28 10:30:00,004 INFO L131 PetriNetUnfolder]: For 447/447 co-relation queries the response was YES. [2023-01-28 10:30:00,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 710 conditions, 189 events. 96/189 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 629 event pairs, 28 based on Foata normal form. 6/195 useless extension candidates. Maximal degree in co-relation 486. Up to 96 conditions per place. [2023-01-28 10:30:00,007 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 25 selfloop transitions, 11 changer transitions 7/43 dead transitions. [2023-01-28 10:30:00,007 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 43 transitions, 312 flow [2023-01-28 10:30:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 10:30:00,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 10:30:00,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2023-01-28 10:30:00,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447682119205298 [2023-01-28 10:30:00,008 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 338 transitions. [2023-01-28 10:30:00,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 338 transitions. [2023-01-28 10:30:00,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:00,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 338 transitions. [2023-01-28 10:30:00,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.6) internal successors, (338), 5 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:00,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:00,011 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 151.0) internal successors, (906), 6 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:00,011 INFO L175 Difference]: Start difference. First operand has 34 places, 26 transitions, 165 flow. Second operand 5 states and 338 transitions. [2023-01-28 10:30:00,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 43 transitions, 312 flow [2023-01-28 10:30:00,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 43 transitions, 298 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-01-28 10:30:00,014 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 179 flow [2023-01-28 10:30:00,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-01-28 10:30:00,016 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-01-28 10:30:00,016 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 179 flow [2023-01-28 10:30:00,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 62.5) internal successors, (500), 8 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:00,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:00,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:00,023 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 10:30:00,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:00,221 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 10:30:00,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:00,222 INFO L85 PathProgramCache]: Analyzing trace with hash -323427280, now seen corresponding path program 1 times [2023-01-28 10:30:00,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:00,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584166949] [2023-01-28 10:30:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:00,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:00,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584166949] [2023-01-28 10:30:00,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584166949] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576183666] [2023-01-28 10:30:00,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:00,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:00,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:00,352 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 10:30:00,354 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 10:30:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:00,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 10:30:00,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:00,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:00,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576183666] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:00,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:00,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 4 [2023-01-28 10:30:00,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958478427] [2023-01-28 10:30:00,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:00,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 10:30:00,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:00,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 10:30:00,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-01-28 10:30:00,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 151 [2023-01-28 10:30:00,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:00,490 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:00,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 151 [2023-01-28 10:30:00,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:00,566 INFO L130 PetriNetUnfolder]: 122/237 cut-off events. [2023-01-28 10:30:00,566 INFO L131 PetriNetUnfolder]: For 493/512 co-relation queries the response was YES. [2023-01-28 10:30:00,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 237 events. 122/237 cut-off events. For 493/512 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 861 event pairs, 20 based on Foata normal form. 19/247 useless extension candidates. Maximal degree in co-relation 670. Up to 111 conditions per place. [2023-01-28 10:30:00,568 INFO L137 encePairwiseOnDemand]: 147/151 looper letters, 30 selfloop transitions, 11 changer transitions 4/50 dead transitions. [2023-01-28 10:30:00,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 50 transitions, 374 flow [2023-01-28 10:30:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 10:30:00,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 10:30:00,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 299 transitions. [2023-01-28 10:30:00,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49503311258278143 [2023-01-28 10:30:00,569 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 299 transitions. [2023-01-28 10:30:00,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 299 transitions. [2023-01-28 10:30:00,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:00,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 299 transitions. [2023-01-28 10:30:00,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 74.75) internal successors, (299), 4 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:00,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:00,571 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 151.0) internal successors, (755), 5 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:00,571 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 179 flow. Second operand 4 states and 299 transitions. [2023-01-28 10:30:00,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 50 transitions, 374 flow [2023-01-28 10:30:00,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 50 transitions, 331 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-01-28 10:30:00,573 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 254 flow [2023-01-28 10:30:00,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-01-28 10:30:00,577 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-01-28 10:30:00,577 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 254 flow [2023-01-28 10:30:00,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 70.5) internal successors, (423), 6 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:00,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:00,578 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:00,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:00,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:00,791 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 10:30:00,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:00,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1179339409, now seen corresponding path program 2 times [2023-01-28 10:30:00,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:00,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266473882] [2023-01-28 10:30:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:00,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:00,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:00,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266473882] [2023-01-28 10:30:00,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266473882] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:00,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389216608] [2023-01-28 10:30:00,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:30:00,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:00,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:00,911 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 10:30:00,928 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 10:30:00,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:30:00,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:00,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:30:00,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:01,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:01,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:01,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389216608] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:01,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:01,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2023-01-28 10:30:01,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995879995] [2023-01-28 10:30:01,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:01,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 10:30:01,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:01,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 10:30:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-01-28 10:30:01,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:01,069 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 254 flow. Second operand has 12 states, 12 states have (on average 62.666666666666664) internal successors, (752), 12 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:01,069 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:01,069 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:01,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:01,351 INFO L130 PetriNetUnfolder]: 265/503 cut-off events. [2023-01-28 10:30:01,351 INFO L131 PetriNetUnfolder]: For 1086/1086 co-relation queries the response was YES. [2023-01-28 10:30:01,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 503 events. 265/503 cut-off events. For 1086/1086 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2160 event pairs, 41 based on Foata normal form. 12/515 useless extension candidates. Maximal degree in co-relation 1607. Up to 185 conditions per place. [2023-01-28 10:30:01,354 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 68 selfloop transitions, 20 changer transitions 7/95 dead transitions. [2023-01-28 10:30:01,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 95 transitions, 738 flow [2023-01-28 10:30:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:30:01,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:30:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 676 transitions. [2023-01-28 10:30:01,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.447682119205298 [2023-01-28 10:30:01,356 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 676 transitions. [2023-01-28 10:30:01,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 676 transitions. [2023-01-28 10:30:01,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:01,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 676 transitions. [2023-01-28 10:30:01,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 67.6) internal successors, (676), 10 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:01,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:01,359 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:01,359 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 254 flow. Second operand 10 states and 676 transitions. [2023-01-28 10:30:01,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 95 transitions, 738 flow [2023-01-28 10:30:01,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 95 transitions, 720 flow, removed 9 selfloop flow, removed 0 redundant places. [2023-01-28 10:30:01,362 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 448 flow [2023-01-28 10:30:01,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=448, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2023-01-28 10:30:01,363 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-01-28 10:30:01,364 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 448 flow [2023-01-28 10:30:01,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 62.666666666666664) internal successors, (752), 12 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:01,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:01,365 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:01,381 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 10:30:01,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:01,570 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 10:30:01,571 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1524658179, now seen corresponding path program 3 times [2023-01-28 10:30:01,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:01,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148375039] [2023-01-28 10:30:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:01,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:01,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:01,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148375039] [2023-01-28 10:30:01,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148375039] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:01,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788124935] [2023-01-28 10:30:01,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:30:01,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:01,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:01,682 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 10:30:01,695 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 10:30:01,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 10:30:01,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:01,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:30:01,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:01,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:01,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:01,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788124935] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:01,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:01,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-28 10:30:01,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37430265] [2023-01-28 10:30:01,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:01,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 10:30:01,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:01,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 10:30:01,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-01-28 10:30:01,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:01,853 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 448 flow. Second operand has 14 states, 14 states have (on average 62.214285714285715) internal successors, (871), 14 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:01,853 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:01,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:01,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:02,345 INFO L130 PetriNetUnfolder]: 335/629 cut-off events. [2023-01-28 10:30:02,345 INFO L131 PetriNetUnfolder]: For 2648/2648 co-relation queries the response was YES. [2023-01-28 10:30:02,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2888 conditions, 629 events. 335/629 cut-off events. For 2648/2648 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2877 event pairs, 45 based on Foata normal form. 38/667 useless extension candidates. Maximal degree in co-relation 2424. Up to 209 conditions per place. [2023-01-28 10:30:02,349 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 90 selfloop transitions, 40 changer transitions 10/140 dead transitions. [2023-01-28 10:30:02,349 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 140 transitions, 1179 flow [2023-01-28 10:30:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 10:30:02,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 10:30:02,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1205 transitions. [2023-01-28 10:30:02,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44334069168506257 [2023-01-28 10:30:02,352 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1205 transitions. [2023-01-28 10:30:02,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1205 transitions. [2023-01-28 10:30:02,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:02,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1205 transitions. [2023-01-28 10:30:02,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 66.94444444444444) internal successors, (1205), 18 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:02,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:02,358 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 151.0) internal successors, (2869), 19 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:02,359 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 448 flow. Second operand 18 states and 1205 transitions. [2023-01-28 10:30:02,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 140 transitions, 1179 flow [2023-01-28 10:30:02,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 140 transitions, 1104 flow, removed 34 selfloop flow, removed 2 redundant places. [2023-01-28 10:30:02,366 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 725 flow [2023-01-28 10:30:02,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=725, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2023-01-28 10:30:02,368 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-01-28 10:30:02,368 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 725 flow [2023-01-28 10:30:02,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 62.214285714285715) internal successors, (871), 14 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:02,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:02,368 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:02,387 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 10:30:02,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:02,574 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 10:30:02,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:02,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1900702783, now seen corresponding path program 4 times [2023-01-28 10:30:02,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:02,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635044406] [2023-01-28 10:30:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:02,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:02,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:02,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:02,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635044406] [2023-01-28 10:30:02,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635044406] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:02,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721831340] [2023-01-28 10:30:02,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:30:02,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:02,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:02,720 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 10:30:02,722 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 10:30:02,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:30:02,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:30:02,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:02,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:02,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721831340] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:02,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:02,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-28 10:30:02,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329844387] [2023-01-28 10:30:02,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:02,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 10:30:02,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:02,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 10:30:02,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-01-28 10:30:02,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:02,871 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 725 flow. Second operand has 14 states, 14 states have (on average 61.92857142857143) internal successors, (867), 14 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:02,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:02,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:02,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:03,661 INFO L130 PetriNetUnfolder]: 469/939 cut-off events. [2023-01-28 10:30:03,662 INFO L131 PetriNetUnfolder]: For 8851/8851 co-relation queries the response was YES. [2023-01-28 10:30:03,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5444 conditions, 939 events. 469/939 cut-off events. For 8851/8851 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5117 event pairs, 10 based on Foata normal form. 16/955 useless extension candidates. Maximal degree in co-relation 4818. Up to 293 conditions per place. [2023-01-28 10:30:03,668 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 121 selfloop transitions, 91 changer transitions 44/256 dead transitions. [2023-01-28 10:30:03,668 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 256 transitions, 2777 flow [2023-01-28 10:30:03,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 10:30:03,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 10:30:03,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2110 transitions. [2023-01-28 10:30:03,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4366721854304636 [2023-01-28 10:30:03,673 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2110 transitions. [2023-01-28 10:30:03,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2110 transitions. [2023-01-28 10:30:03,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:03,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2110 transitions. [2023-01-28 10:30:03,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 65.9375) internal successors, (2110), 32 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:03,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 151.0) internal successors, (4983), 33 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:03,682 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 151.0) internal successors, (4983), 33 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:03,682 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 725 flow. Second operand 32 states and 2110 transitions. [2023-01-28 10:30:03,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 256 transitions, 2777 flow [2023-01-28 10:30:03,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 256 transitions, 2456 flow, removed 124 selfloop flow, removed 8 redundant places. [2023-01-28 10:30:03,710 INFO L231 Difference]: Finished difference. Result has 108 places, 127 transitions, 1544 flow [2023-01-28 10:30:03,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1544, PETRI_PLACES=108, PETRI_TRANSITIONS=127} [2023-01-28 10:30:03,711 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 88 predicate places. [2023-01-28 10:30:03,711 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 127 transitions, 1544 flow [2023-01-28 10:30:03,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.92857142857143) internal successors, (867), 14 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:03,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:03,712 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:03,720 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 10:30:03,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:03,917 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 10:30:03,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1874186445, now seen corresponding path program 5 times [2023-01-28 10:30:03,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:03,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405131230] [2023-01-28 10:30:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:03,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:03,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:03,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405131230] [2023-01-28 10:30:04,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405131230] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:04,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733577581] [2023-01-28 10:30:04,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:30:04,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:04,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:04,002 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 10:30:04,004 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 10:30:04,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:30:04,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:04,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:30:04,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:04,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:04,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:04,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733577581] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:04,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:04,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-01-28 10:30:04,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220082517] [2023-01-28 10:30:04,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:04,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:30:04,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:30:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:30:04,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:04,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 127 transitions, 1544 flow. Second operand has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:04,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:04,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:04,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:04,618 INFO L130 PetriNetUnfolder]: 405/798 cut-off events. [2023-01-28 10:30:04,618 INFO L131 PetriNetUnfolder]: For 13818/13818 co-relation queries the response was YES. [2023-01-28 10:30:04,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5309 conditions, 798 events. 405/798 cut-off events. For 13818/13818 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4112 event pairs, 32 based on Foata normal form. 24/822 useless extension candidates. Maximal degree in co-relation 4674. Up to 221 conditions per place. [2023-01-28 10:30:04,624 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 103 selfloop transitions, 86 changer transitions 3/192 dead transitions. [2023-01-28 10:30:04,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 192 transitions, 2332 flow [2023-01-28 10:30:04,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-01-28 10:30:04,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-01-28 10:30:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1318 transitions. [2023-01-28 10:30:04,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43642384105960264 [2023-01-28 10:30:04,628 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1318 transitions. [2023-01-28 10:30:04,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1318 transitions. [2023-01-28 10:30:04,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:04,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1318 transitions. [2023-01-28 10:30:04,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.9) internal successors, (1318), 20 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:04,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:04,635 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 151.0) internal successors, (3171), 21 states have internal predecessors, (3171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:04,635 INFO L175 Difference]: Start difference. First operand has 108 places, 127 transitions, 1544 flow. Second operand 20 states and 1318 transitions. [2023-01-28 10:30:04,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 192 transitions, 2332 flow [2023-01-28 10:30:04,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 192 transitions, 1998 flow, removed 134 selfloop flow, removed 6 redundant places. [2023-01-28 10:30:04,695 INFO L231 Difference]: Finished difference. Result has 120 places, 126 transitions, 1491 flow [2023-01-28 10:30:04,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1491, PETRI_PLACES=120, PETRI_TRANSITIONS=126} [2023-01-28 10:30:04,696 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-01-28 10:30:04,696 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 126 transitions, 1491 flow [2023-01-28 10:30:04,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:04,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:04,697 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:04,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:04,901 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,SelfDestructingSolverStorable9 [2023-01-28 10:30:04,902 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 10:30:04,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1455539503, now seen corresponding path program 6 times [2023-01-28 10:30:04,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:04,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942772131] [2023-01-28 10:30:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:04,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:05,005 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:05,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:05,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942772131] [2023-01-28 10:30:05,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942772131] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:05,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610666435] [2023-01-28 10:30:05,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:30:05,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:05,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:05,007 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 10:30:05,008 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 10:30:05,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 10:30:05,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:05,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:30:05,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:05,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:05,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610666435] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:05,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:05,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-01-28 10:30:05,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001777280] [2023-01-28 10:30:05,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:05,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:30:05,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:05,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:30:05,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:30:05,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:05,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 126 transitions, 1491 flow. Second operand has 15 states, 15 states have (on average 62.06666666666667) internal successors, (931), 15 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:05,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:05,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:05,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:05,821 INFO L130 PetriNetUnfolder]: 649/1264 cut-off events. [2023-01-28 10:30:05,821 INFO L131 PetriNetUnfolder]: For 32066/32066 co-relation queries the response was YES. [2023-01-28 10:30:05,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8728 conditions, 1264 events. 649/1264 cut-off events. For 32066/32066 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7386 event pairs, 138 based on Foata normal form. 88/1352 useless extension candidates. Maximal degree in co-relation 8056. Up to 686 conditions per place. [2023-01-28 10:30:05,831 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 179 selfloop transitions, 124 changer transitions 2/305 dead transitions. [2023-01-28 10:30:05,831 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 305 transitions, 3898 flow [2023-01-28 10:30:05,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 10:30:05,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 10:30:05,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1595 transitions. [2023-01-28 10:30:05,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.440121412803532 [2023-01-28 10:30:05,835 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1595 transitions. [2023-01-28 10:30:05,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1595 transitions. [2023-01-28 10:30:05,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:05,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1595 transitions. [2023-01-28 10:30:05,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 66.45833333333333) internal successors, (1595), 24 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:05,841 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:05,842 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 151.0) internal successors, (3775), 25 states have internal predecessors, (3775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:05,842 INFO L175 Difference]: Start difference. First operand has 120 places, 126 transitions, 1491 flow. Second operand 24 states and 1595 transitions. [2023-01-28 10:30:05,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 305 transitions, 3898 flow [2023-01-28 10:30:05,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 305 transitions, 3711 flow, removed 31 selfloop flow, removed 17 redundant places. [2023-01-28 10:30:05,881 INFO L231 Difference]: Finished difference. Result has 139 places, 200 transitions, 2926 flow [2023-01-28 10:30:05,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=1375, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2926, PETRI_PLACES=139, PETRI_TRANSITIONS=200} [2023-01-28 10:30:05,881 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 119 predicate places. [2023-01-28 10:30:05,881 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 200 transitions, 2926 flow [2023-01-28 10:30:05,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.06666666666667) internal successors, (931), 15 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:05,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:05,882 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:05,897 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 10:30:06,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:06,087 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 10:30:06,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:06,087 INFO L85 PathProgramCache]: Analyzing trace with hash 862096835, now seen corresponding path program 7 times [2023-01-28 10:30:06,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:06,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061427656] [2023-01-28 10:30:06,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:06,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:06,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:06,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:06,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061427656] [2023-01-28 10:30:06,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061427656] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:06,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150345198] [2023-01-28 10:30:06,193 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:30:06,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:06,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:06,194 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 10:30:06,218 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 10:30:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:06,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:30:06,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:06,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:06,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150345198] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:06,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:06,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-01-28 10:30:06,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224262950] [2023-01-28 10:30:06,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:06,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 10:30:06,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:06,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 10:30:06,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-01-28 10:30:06,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:06,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 200 transitions, 2926 flow. Second operand has 14 states, 14 states have (on average 61.857142857142854) internal successors, (866), 14 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:06,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:06,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:06,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:06,864 INFO L130 PetriNetUnfolder]: 759/1518 cut-off events. [2023-01-28 10:30:06,865 INFO L131 PetriNetUnfolder]: For 52704/52704 co-relation queries the response was YES. [2023-01-28 10:30:06,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12732 conditions, 1518 events. 759/1518 cut-off events. For 52704/52704 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 9435 event pairs, 61 based on Foata normal form. 16/1534 useless extension candidates. Maximal degree in co-relation 11351. Up to 501 conditions per place. [2023-01-28 10:30:06,879 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 142 selfloop transitions, 163 changer transitions 6/311 dead transitions. [2023-01-28 10:30:06,879 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 311 transitions, 5135 flow [2023-01-28 10:30:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 10:30:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 10:30:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1438 transitions. [2023-01-28 10:30:06,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4328717639975918 [2023-01-28 10:30:06,881 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1438 transitions. [2023-01-28 10:30:06,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1438 transitions. [2023-01-28 10:30:06,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:06,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1438 transitions. [2023-01-28 10:30:06,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.36363636363636) internal successors, (1438), 22 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:06,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 151.0) internal successors, (3473), 23 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:06,888 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 151.0) internal successors, (3473), 23 states have internal predecessors, (3473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:06,888 INFO L175 Difference]: Start difference. First operand has 139 places, 200 transitions, 2926 flow. Second operand 22 states and 1438 transitions. [2023-01-28 10:30:06,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 311 transitions, 5135 flow [2023-01-28 10:30:06,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 311 transitions, 4534 flow, removed 276 selfloop flow, removed 6 redundant places. [2023-01-28 10:30:06,993 INFO L231 Difference]: Finished difference. Result has 163 places, 242 transitions, 3757 flow [2023-01-28 10:30:06,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=2415, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3757, PETRI_PLACES=163, PETRI_TRANSITIONS=242} [2023-01-28 10:30:06,993 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2023-01-28 10:30:06,993 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 242 transitions, 3757 flow [2023-01-28 10:30:06,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 61.857142857142854) internal successors, (866), 14 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:06,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:06,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:06,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:07,199 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,SelfDestructingSolverStorable11 [2023-01-28 10:30:07,199 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 10:30:07,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:07,200 INFO L85 PathProgramCache]: Analyzing trace with hash 860907543, now seen corresponding path program 8 times [2023-01-28 10:30:07,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:07,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564773444] [2023-01-28 10:30:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:07,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:07,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:07,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:07,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564773444] [2023-01-28 10:30:07,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564773444] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:07,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018427259] [2023-01-28 10:30:07,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:30:07,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:07,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:07,284 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 10:30:07,286 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 10:30:07,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:30:07,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:07,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 10:30:07,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:07,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:07,433 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:07,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018427259] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:07,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:07,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-01-28 10:30:07,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43998104] [2023-01-28 10:30:07,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:07,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:30:07,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:07,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:30:07,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:30:07,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:07,437 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 242 transitions, 3757 flow. Second operand has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:07,437 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:07,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:07,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:07,864 INFO L130 PetriNetUnfolder]: 729/1444 cut-off events. [2023-01-28 10:30:07,865 INFO L131 PetriNetUnfolder]: For 68928/68928 co-relation queries the response was YES. [2023-01-28 10:30:07,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12559 conditions, 1444 events. 729/1444 cut-off events. For 68928/68928 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 8778 event pairs, 155 based on Foata normal form. 24/1468 useless extension candidates. Maximal degree in co-relation 11185. Up to 681 conditions per place. [2023-01-28 10:30:07,883 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 127 selfloop transitions, 143 changer transitions 3/273 dead transitions. [2023-01-28 10:30:07,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 273 transitions, 4407 flow [2023-01-28 10:30:07,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 10:30:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 10:30:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 857 transitions. [2023-01-28 10:30:07,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43657666836474784 [2023-01-28 10:30:07,885 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 857 transitions. [2023-01-28 10:30:07,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 857 transitions. [2023-01-28 10:30:07,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:07,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 857 transitions. [2023-01-28 10:30:07,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.92307692307692) internal successors, (857), 13 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:07,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:07,888 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 151.0) internal successors, (2114), 14 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:07,889 INFO L175 Difference]: Start difference. First operand has 163 places, 242 transitions, 3757 flow. Second operand 13 states and 857 transitions. [2023-01-28 10:30:07,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 273 transitions, 4407 flow [2023-01-28 10:30:08,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 273 transitions, 4211 flow, removed 94 selfloop flow, removed 3 redundant places. [2023-01-28 10:30:08,014 INFO L231 Difference]: Finished difference. Result has 173 places, 237 transitions, 3869 flow [2023-01-28 10:30:08,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3378, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3869, PETRI_PLACES=173, PETRI_TRANSITIONS=237} [2023-01-28 10:30:08,015 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-01-28 10:30:08,015 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 237 transitions, 3869 flow [2023-01-28 10:30:08,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 61.8) internal successors, (927), 15 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:08,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:08,016 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:08,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:08,233 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,SelfDestructingSolverStorable12 [2023-01-28 10:30:08,234 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 10:30:08,234 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:08,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1477455475, now seen corresponding path program 9 times [2023-01-28 10:30:08,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:08,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510451178] [2023-01-28 10:30:08,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:08,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:08,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:08,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:08,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510451178] [2023-01-28 10:30:08,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510451178] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:08,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463793024] [2023-01-28 10:30:08,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:30:08,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:08,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:08,430 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 10:30:08,431 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 10:30:08,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 10:30:08,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:08,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 10:30:08,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:08,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:08,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:08,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463793024] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:08,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:08,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-01-28 10:30:08,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441720181] [2023-01-28 10:30:08,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:08,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:30:08,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:08,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:30:08,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:30:08,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 151 [2023-01-28 10:30:08,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 237 transitions, 3869 flow. Second operand has 19 states, 19 states have (on average 54.26315789473684) internal successors, (1031), 19 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:08,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:08,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 151 [2023-01-28 10:30:08,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:09,236 INFO L130 PetriNetUnfolder]: 879/1788 cut-off events. [2023-01-28 10:30:09,237 INFO L131 PetriNetUnfolder]: For 96941/96952 co-relation queries the response was YES. [2023-01-28 10:30:09,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16877 conditions, 1788 events. 879/1788 cut-off events. For 96941/96952 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 11793 event pairs, 120 based on Foata normal form. 82/1870 useless extension candidates. Maximal degree in co-relation 15717. Up to 900 conditions per place. [2023-01-28 10:30:09,252 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 196 selfloop transitions, 89 changer transitions 61/352 dead transitions. [2023-01-28 10:30:09,252 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 352 transitions, 6317 flow [2023-01-28 10:30:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 10:30:09,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 10:30:09,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 595 transitions. [2023-01-28 10:30:09,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39403973509933776 [2023-01-28 10:30:09,254 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 595 transitions. [2023-01-28 10:30:09,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 595 transitions. [2023-01-28 10:30:09,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:09,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 595 transitions. [2023-01-28 10:30:09,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 59.5) internal successors, (595), 10 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:09,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:09,256 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 151.0) internal successors, (1661), 11 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:09,256 INFO L175 Difference]: Start difference. First operand has 173 places, 237 transitions, 3869 flow. Second operand 10 states and 595 transitions. [2023-01-28 10:30:09,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 352 transitions, 6317 flow [2023-01-28 10:30:09,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 352 transitions, 6029 flow, removed 20 selfloop flow, removed 15 redundant places. [2023-01-28 10:30:09,413 INFO L231 Difference]: Finished difference. Result has 170 places, 247 transitions, 4397 flow [2023-01-28 10:30:09,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4397, PETRI_PLACES=170, PETRI_TRANSITIONS=247} [2023-01-28 10:30:09,414 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 150 predicate places. [2023-01-28 10:30:09,414 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 247 transitions, 4397 flow [2023-01-28 10:30:09,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 54.26315789473684) internal successors, (1031), 19 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:09,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:09,415 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:09,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-01-28 10:30:09,619 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,SelfDestructingSolverStorable13 [2023-01-28 10:30:09,620 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 10:30:09,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:09,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2063184372, now seen corresponding path program 10 times [2023-01-28 10:30:09,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:09,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573125088] [2023-01-28 10:30:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:09,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:09,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:09,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:09,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:09,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573125088] [2023-01-28 10:30:09,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573125088] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:09,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376092775] [2023-01-28 10:30:09,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:30:09,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:09,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:09,762 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 10:30:09,781 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 10:30:09,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:30:09,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:09,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:30:09,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:09,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:09,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376092775] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:09,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:09,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-01-28 10:30:09,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085172584] [2023-01-28 10:30:09,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:09,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 10:30:09,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:09,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 10:30:09,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-01-28 10:30:09,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:09,958 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 247 transitions, 4397 flow. Second operand has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:09,958 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:09,958 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:09,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:10,878 INFO L130 PetriNetUnfolder]: 1647/3340 cut-off events. [2023-01-28 10:30:10,878 INFO L131 PetriNetUnfolder]: For 174080/174080 co-relation queries the response was YES. [2023-01-28 10:30:10,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31526 conditions, 3340 events. 1647/3340 cut-off events. For 174080/174080 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24487 event pairs, 203 based on Foata normal form. 68/3408 useless extension candidates. Maximal degree in co-relation 27779. Up to 1261 conditions per place. [2023-01-28 10:30:10,902 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 450 selfloop transitions, 146 changer transitions 2/598 dead transitions. [2023-01-28 10:30:10,902 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 598 transitions, 11388 flow [2023-01-28 10:30:10,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 10:30:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 10:30:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1138 transitions. [2023-01-28 10:30:10,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433190494740943 [2023-01-28 10:30:10,904 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1138 transitions. [2023-01-28 10:30:10,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1138 transitions. [2023-01-28 10:30:10,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:10,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1138 transitions. [2023-01-28 10:30:10,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 66.94117647058823) internal successors, (1138), 17 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:10,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 151.0) internal successors, (2718), 18 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:10,908 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 151.0) internal successors, (2718), 18 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:10,908 INFO L175 Difference]: Start difference. First operand has 170 places, 247 transitions, 4397 flow. Second operand 17 states and 1138 transitions. [2023-01-28 10:30:10,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 598 transitions, 11388 flow [2023-01-28 10:30:11,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 598 transitions, 11113 flow, removed 119 selfloop flow, removed 7 redundant places. [2023-01-28 10:30:11,134 INFO L231 Difference]: Finished difference. Result has 179 places, 361 transitions, 7164 flow [2023-01-28 10:30:11,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7164, PETRI_PLACES=179, PETRI_TRANSITIONS=361} [2023-01-28 10:30:11,134 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 159 predicate places. [2023-01-28 10:30:11,134 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 361 transitions, 7164 flow [2023-01-28 10:30:11,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 62.0) internal successors, (930), 15 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:11,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:11,135 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:11,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:11,339 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,SelfDestructingSolverStorable14 [2023-01-28 10:30:11,339 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 10:30:11,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:11,340 INFO L85 PathProgramCache]: Analyzing trace with hash -475875398, now seen corresponding path program 11 times [2023-01-28 10:30:11,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:11,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757184857] [2023-01-28 10:30:11,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:11,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:11,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:11,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:11,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757184857] [2023-01-28 10:30:11,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757184857] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:11,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57812775] [2023-01-28 10:30:11,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:30:11,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:11,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:11,456 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 10:30:11,496 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 10:30:11,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:30:11,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:11,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:30:11,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:11,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:11,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:11,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57812775] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:11,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:11,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-28 10:30:11,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024133378] [2023-01-28 10:30:11,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:11,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:30:11,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:11,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:30:11,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:30:11,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:11,676 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 361 transitions, 7164 flow. Second operand has 16 states, 16 states have (on average 61.875) internal successors, (990), 16 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:11,676 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:11,676 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:11,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:13,206 INFO L130 PetriNetUnfolder]: 1772/3571 cut-off events. [2023-01-28 10:30:13,207 INFO L131 PetriNetUnfolder]: For 183020/183020 co-relation queries the response was YES. [2023-01-28 10:30:13,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34885 conditions, 3571 events. 1772/3571 cut-off events. For 183020/183020 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 26445 event pairs, 231 based on Foata normal form. 58/3629 useless extension candidates. Maximal degree in co-relation 31693. Up to 1314 conditions per place. [2023-01-28 10:30:13,297 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 513 selfloop transitions, 195 changer transitions 2/710 dead transitions. [2023-01-28 10:30:13,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 710 transitions, 13680 flow [2023-01-28 10:30:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 10:30:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 10:30:13,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2316 transitions. [2023-01-28 10:30:13,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4382213812677389 [2023-01-28 10:30:13,300 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2316 transitions. [2023-01-28 10:30:13,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2316 transitions. [2023-01-28 10:30:13,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:13,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2316 transitions. [2023-01-28 10:30:13,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.17142857142858) internal successors, (2316), 35 states have internal predecessors, (2316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:13,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:13,306 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:13,306 INFO L175 Difference]: Start difference. First operand has 179 places, 361 transitions, 7164 flow. Second operand 35 states and 2316 transitions. [2023-01-28 10:30:13,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 710 transitions, 13680 flow [2023-01-28 10:30:13,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 710 transitions, 12959 flow, removed 328 selfloop flow, removed 5 redundant places. [2023-01-28 10:30:13,657 INFO L231 Difference]: Finished difference. Result has 219 places, 426 transitions, 8638 flow [2023-01-28 10:30:13,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=8638, PETRI_PLACES=219, PETRI_TRANSITIONS=426} [2023-01-28 10:30:13,658 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 199 predicate places. [2023-01-28 10:30:13,658 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 426 transitions, 8638 flow [2023-01-28 10:30:13,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.875) internal successors, (990), 16 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:13,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:13,658 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:13,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-01-28 10:30:13,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:13,863 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 10:30:13,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:13,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1140862416, now seen corresponding path program 12 times [2023-01-28 10:30:13,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:13,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006728482] [2023-01-28 10:30:13,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:13,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:14,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:14,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:14,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006728482] [2023-01-28 10:30:14,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006728482] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:14,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842741759] [2023-01-28 10:30:14,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:30:14,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:14,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:14,025 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:30:14,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 10:30:14,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 10:30:14,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:14,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:30:14,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:14,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:14,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842741759] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:14,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:14,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-01-28 10:30:14,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083737414] [2023-01-28 10:30:14,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:14,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 10:30:14,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 10:30:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-01-28 10:30:14,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:14,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 426 transitions, 8638 flow. Second operand has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:14,310 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:14,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:14,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:17,055 INFO L130 PetriNetUnfolder]: 2172/4396 cut-off events. [2023-01-28 10:30:17,055 INFO L131 PetriNetUnfolder]: For 281276/281276 co-relation queries the response was YES. [2023-01-28 10:30:17,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46183 conditions, 4396 events. 2172/4396 cut-off events. For 281276/281276 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 34209 event pairs, 80 based on Foata normal form. 38/4434 useless extension candidates. Maximal degree in co-relation 45755. Up to 1393 conditions per place. [2023-01-28 10:30:17,095 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 301 selfloop transitions, 579 changer transitions 32/912 dead transitions. [2023-01-28 10:30:17,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 912 transitions, 19241 flow [2023-01-28 10:30:17,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-01-28 10:30:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-01-28 10:30:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3928 transitions. [2023-01-28 10:30:17,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4335540838852097 [2023-01-28 10:30:17,100 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3928 transitions. [2023-01-28 10:30:17,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3928 transitions. [2023-01-28 10:30:17,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:17,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3928 transitions. [2023-01-28 10:30:17,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 65.46666666666667) internal successors, (3928), 60 states have internal predecessors, (3928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:17,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 151.0) internal successors, (9211), 61 states have internal predecessors, (9211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:17,111 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 151.0) internal successors, (9211), 61 states have internal predecessors, (9211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:17,111 INFO L175 Difference]: Start difference. First operand has 219 places, 426 transitions, 8638 flow. Second operand 60 states and 3928 transitions. [2023-01-28 10:30:17,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 912 transitions, 19241 flow [2023-01-28 10:30:17,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 912 transitions, 18425 flow, removed 353 selfloop flow, removed 10 redundant places. [2023-01-28 10:30:17,843 INFO L231 Difference]: Finished difference. Result has 285 places, 676 transitions, 15440 flow [2023-01-28 10:30:17,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=8043, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=352, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=15440, PETRI_PLACES=285, PETRI_TRANSITIONS=676} [2023-01-28 10:30:17,844 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 265 predicate places. [2023-01-28 10:30:17,844 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 676 transitions, 15440 flow [2023-01-28 10:30:17,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:17,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:17,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:17,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:18,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 10:30:18,050 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:30:18,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:18,050 INFO L85 PathProgramCache]: Analyzing trace with hash 270066790, now seen corresponding path program 13 times [2023-01-28 10:30:18,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:18,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848868193] [2023-01-28 10:30:18,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:18,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:18,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:18,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848868193] [2023-01-28 10:30:18,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848868193] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:18,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918975809] [2023-01-28 10:30:18,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:30:18,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:18,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:18,157 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:30:18,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 10:30:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:18,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:30:18,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:18,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:18,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:18,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918975809] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:18,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:18,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-01-28 10:30:18,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122086702] [2023-01-28 10:30:18,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:18,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:30:18,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:18,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:30:18,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:30:18,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:18,384 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 676 transitions, 15440 flow. Second operand has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:18,384 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:18,384 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:18,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:20,935 INFO L130 PetriNetUnfolder]: 2312/4614 cut-off events. [2023-01-28 10:30:20,935 INFO L131 PetriNetUnfolder]: For 486549/486549 co-relation queries the response was YES. [2023-01-28 10:30:20,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54379 conditions, 4614 events. 2312/4614 cut-off events. For 486549/486549 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 35739 event pairs, 229 based on Foata normal form. 90/4704 useless extension candidates. Maximal degree in co-relation 53799. Up to 1654 conditions per place. [2023-01-28 10:30:20,977 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 569 selfloop transitions, 324 changer transitions 20/913 dead transitions. [2023-01-28 10:30:20,977 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 913 transitions, 21042 flow [2023-01-28 10:30:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 10:30:20,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 10:30:20,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2313 transitions. [2023-01-28 10:30:20,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43765373699148535 [2023-01-28 10:30:20,979 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2313 transitions. [2023-01-28 10:30:20,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2313 transitions. [2023-01-28 10:30:20,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:20,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2313 transitions. [2023-01-28 10:30:20,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 66.08571428571429) internal successors, (2313), 35 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:20,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:20,986 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 151.0) internal successors, (5436), 36 states have internal predecessors, (5436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:20,986 INFO L175 Difference]: Start difference. First operand has 285 places, 676 transitions, 15440 flow. Second operand 35 states and 2313 transitions. [2023-01-28 10:30:20,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 913 transitions, 21042 flow [2023-01-28 10:30:22,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 913 transitions, 18678 flow, removed 1059 selfloop flow, removed 17 redundant places. [2023-01-28 10:30:22,480 INFO L231 Difference]: Finished difference. Result has 307 places, 734 transitions, 15851 flow [2023-01-28 10:30:22,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=13381, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=15851, PETRI_PLACES=307, PETRI_TRANSITIONS=734} [2023-01-28 10:30:22,481 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 287 predicate places. [2023-01-28 10:30:22,481 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 734 transitions, 15851 flow [2023-01-28 10:30:22,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:22,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:22,481 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:22,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:22,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 10:30:22,687 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:30:22,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1139673124, now seen corresponding path program 14 times [2023-01-28 10:30:22,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:22,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789938438] [2023-01-28 10:30:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:22,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:22,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:22,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789938438] [2023-01-28 10:30:22,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789938438] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:22,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034865171] [2023-01-28 10:30:22,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:30:22,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:22,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:22,860 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:30:22,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 10:30:22,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:30:22,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:22,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:30:22,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:22,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:23,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:23,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034865171] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:23,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:23,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-01-28 10:30:23,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249146110] [2023-01-28 10:30:23,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:23,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 10:30:23,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:23,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 10:30:23,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2023-01-28 10:30:23,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:23,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 734 transitions, 15851 flow. Second operand has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:23,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:23,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:23,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:25,736 INFO L130 PetriNetUnfolder]: 2324/4664 cut-off events. [2023-01-28 10:30:25,736 INFO L131 PetriNetUnfolder]: For 560320/560320 co-relation queries the response was YES. [2023-01-28 10:30:25,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54453 conditions, 4664 events. 2324/4664 cut-off events. For 560320/560320 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 36423 event pairs, 172 based on Foata normal form. 72/4736 useless extension candidates. Maximal degree in co-relation 53939. Up to 1105 conditions per place. [2023-01-28 10:30:25,778 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 374 selfloop transitions, 541 changer transitions 3/918 dead transitions. [2023-01-28 10:30:25,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 918 transitions, 20073 flow [2023-01-28 10:30:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 10:30:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 10:30:25,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2904 transitions. [2023-01-28 10:30:25,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370860927152318 [2023-01-28 10:30:25,782 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2904 transitions. [2023-01-28 10:30:25,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2904 transitions. [2023-01-28 10:30:25,782 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:25,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2904 transitions. [2023-01-28 10:30:25,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 66.0) internal successors, (2904), 44 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:25,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:25,790 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 151.0) internal successors, (6795), 45 states have internal predecessors, (6795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:25,790 INFO L175 Difference]: Start difference. First operand has 307 places, 734 transitions, 15851 flow. Second operand 44 states and 2904 transitions. [2023-01-28 10:30:25,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 918 transitions, 20073 flow [2023-01-28 10:30:27,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 918 transitions, 19432 flow, removed 223 selfloop flow, removed 17 redundant places. [2023-01-28 10:30:27,465 INFO L231 Difference]: Finished difference. Result has 343 places, 742 transitions, 16941 flow [2023-01-28 10:30:27,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=15020, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=522, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=16941, PETRI_PLACES=343, PETRI_TRANSITIONS=742} [2023-01-28 10:30:27,466 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 323 predicate places. [2023-01-28 10:30:27,466 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 742 transitions, 16941 flow [2023-01-28 10:30:27,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:27,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:27,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:27,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:27,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:27,671 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:30:27,672 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash -452021610, now seen corresponding path program 15 times [2023-01-28 10:30:27,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:27,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494629082] [2023-01-28 10:30:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:27,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:27,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:27,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494629082] [2023-01-28 10:30:27,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494629082] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:27,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288450362] [2023-01-28 10:30:27,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:30:27,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:27,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:27,762 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:30:27,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 10:30:27,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 10:30:27,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:27,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:30:27,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:27,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:27,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:27,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:27,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288450362] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:27,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:27,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-01-28 10:30:27,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660071886] [2023-01-28 10:30:27,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:27,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 10:30:27,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:27,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 10:30:27,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-01-28 10:30:27,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:27,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 742 transitions, 16941 flow. Second operand has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:27,978 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:27,978 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:27,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:30,709 INFO L130 PetriNetUnfolder]: 2789/5587 cut-off events. [2023-01-28 10:30:30,710 INFO L131 PetriNetUnfolder]: For 841141/841141 co-relation queries the response was YES. [2023-01-28 10:30:30,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69341 conditions, 5587 events. 2789/5587 cut-off events. For 841141/841141 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 45175 event pairs, 696 based on Foata normal form. 90/5677 useless extension candidates. Maximal degree in co-relation 68655. Up to 3278 conditions per place. [2023-01-28 10:30:30,865 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 615 selfloop transitions, 410 changer transitions 24/1049 dead transitions. [2023-01-28 10:30:30,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 1049 transitions, 25028 flow [2023-01-28 10:30:30,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 10:30:30,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 10:30:30,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2680 transitions. [2023-01-28 10:30:30,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4328864480697787 [2023-01-28 10:30:30,868 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2680 transitions. [2023-01-28 10:30:30,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2680 transitions. [2023-01-28 10:30:30,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:30,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2680 transitions. [2023-01-28 10:30:30,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 65.36585365853658) internal successors, (2680), 41 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:30,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:30,877 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 151.0) internal successors, (6342), 42 states have internal predecessors, (6342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:30,877 INFO L175 Difference]: Start difference. First operand has 343 places, 742 transitions, 16941 flow. Second operand 41 states and 2680 transitions. [2023-01-28 10:30:30,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 1049 transitions, 25028 flow [2023-01-28 10:30:33,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1049 transitions, 24238 flow, removed 117 selfloop flow, removed 32 redundant places. [2023-01-28 10:30:33,361 INFO L231 Difference]: Finished difference. Result has 364 places, 865 transitions, 21360 flow [2023-01-28 10:30:33,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=16275, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=21360, PETRI_PLACES=364, PETRI_TRANSITIONS=865} [2023-01-28 10:30:33,362 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 344 predicate places. [2023-01-28 10:30:33,362 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 865 transitions, 21360 flow [2023-01-28 10:30:33,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 61.72222222222222) internal successors, (1111), 18 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:33,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:33,362 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:33,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:33,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:33,566 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:30:33,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:33,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1486062540, now seen corresponding path program 16 times [2023-01-28 10:30:33,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:33,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010169790] [2023-01-28 10:30:33,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:33,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:33,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:33,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010169790] [2023-01-28 10:30:33,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010169790] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:33,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025352354] [2023-01-28 10:30:33,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:30:33,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:33,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:33,693 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:30:33,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 10:30:33,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:30:33,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:33,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:30:33,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:33,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:33,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025352354] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:33,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:33,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-28 10:30:33,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715369116] [2023-01-28 10:30:33,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:33,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:30:33,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:33,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:30:33,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:30:33,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:33,890 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 865 transitions, 21360 flow. Second operand has 16 states, 16 states have (on average 61.875) internal successors, (990), 16 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:33,890 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:33,891 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:33,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:36,919 INFO L130 PetriNetUnfolder]: 3178/6320 cut-off events. [2023-01-28 10:30:36,919 INFO L131 PetriNetUnfolder]: For 1055485/1055485 co-relation queries the response was YES. [2023-01-28 10:30:36,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82781 conditions, 6320 events. 3178/6320 cut-off events. For 1055485/1055485 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 51918 event pairs, 976 based on Foata normal form. 58/6378 useless extension candidates. Maximal degree in co-relation 81829. Up to 4281 conditions per place. [2023-01-28 10:30:36,981 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 854 selfloop transitions, 312 changer transitions 4/1170 dead transitions. [2023-01-28 10:30:36,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1170 transitions, 28762 flow [2023-01-28 10:30:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 10:30:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 10:30:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2574 transitions. [2023-01-28 10:30:36,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4370860927152318 [2023-01-28 10:30:36,983 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2574 transitions. [2023-01-28 10:30:36,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2574 transitions. [2023-01-28 10:30:36,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:36,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2574 transitions. [2023-01-28 10:30:36,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 66.0) internal successors, (2574), 39 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:36,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:36,990 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 151.0) internal successors, (6040), 40 states have internal predecessors, (6040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:36,990 INFO L175 Difference]: Start difference. First operand has 364 places, 865 transitions, 21360 flow. Second operand 39 states and 2574 transitions. [2023-01-28 10:30:36,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1170 transitions, 28762 flow [2023-01-28 10:30:40,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1170 transitions, 28239 flow, removed 202 selfloop flow, removed 19 redundant places. [2023-01-28 10:30:40,511 INFO L231 Difference]: Finished difference. Result has 395 places, 969 transitions, 24660 flow [2023-01-28 10:30:40,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=20847, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24660, PETRI_PLACES=395, PETRI_TRANSITIONS=969} [2023-01-28 10:30:40,512 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 375 predicate places. [2023-01-28 10:30:40,513 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 969 transitions, 24660 flow [2023-01-28 10:30:40,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.875) internal successors, (990), 16 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:40,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:40,513 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:40,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-01-28 10:30:40,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:40,718 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:30:40,718 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:40,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1267300304, now seen corresponding path program 17 times [2023-01-28 10:30:40,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:40,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133814754] [2023-01-28 10:30:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:40,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:40,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:40,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133814754] [2023-01-28 10:30:40,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133814754] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:40,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600066613] [2023-01-28 10:30:40,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:30:40,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:40,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:40,812 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:30:40,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 10:30:40,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:30:40,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:40,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:30:40,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:40,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:41,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600066613] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:41,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:41,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-01-28 10:30:41,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105638297] [2023-01-28 10:30:41,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:41,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:30:41,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:41,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:30:41,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:30:41,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:41,025 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 969 transitions, 24660 flow. Second operand has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:41,025 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:41,025 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:41,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:44,915 INFO L130 PetriNetUnfolder]: 3456/6883 cut-off events. [2023-01-28 10:30:44,916 INFO L131 PetriNetUnfolder]: For 1265975/1265975 co-relation queries the response was YES. [2023-01-28 10:30:44,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93386 conditions, 6883 events. 3456/6883 cut-off events. For 1265975/1265975 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 57290 event pairs, 1244 based on Foata normal form. 56/6939 useless extension candidates. Maximal degree in co-relation 92435. Up to 5461 conditions per place. [2023-01-28 10:30:44,991 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 915 selfloop transitions, 244 changer transitions 24/1183 dead transitions. [2023-01-28 10:30:44,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1183 transitions, 30799 flow [2023-01-28 10:30:44,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 10:30:44,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 10:30:44,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1786 transitions. [2023-01-28 10:30:44,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380672062791268 [2023-01-28 10:30:44,993 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1786 transitions. [2023-01-28 10:30:44,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1786 transitions. [2023-01-28 10:30:44,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:44,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1786 transitions. [2023-01-28 10:30:44,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 66.14814814814815) internal successors, (1786), 27 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:44,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 151.0) internal successors, (4228), 28 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:44,997 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 151.0) internal successors, (4228), 28 states have internal predecessors, (4228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:44,997 INFO L175 Difference]: Start difference. First operand has 395 places, 969 transitions, 24660 flow. Second operand 27 states and 1786 transitions. [2023-01-28 10:30:44,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1183 transitions, 30799 flow [2023-01-28 10:30:49,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 1183 transitions, 30022 flow, removed 345 selfloop flow, removed 11 redundant places. [2023-01-28 10:30:49,590 INFO L231 Difference]: Finished difference. Result has 420 places, 1030 transitions, 26451 flow [2023-01-28 10:30:49,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=23839, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=967, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=26451, PETRI_PLACES=420, PETRI_TRANSITIONS=1030} [2023-01-28 10:30:49,591 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 400 predicate places. [2023-01-28 10:30:49,591 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 1030 transitions, 26451 flow [2023-01-28 10:30:49,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:49,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:30:49,592 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:30:49,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 10:30:49,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-28 10:30:49,797 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:30:49,798 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:30:49,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2075125822, now seen corresponding path program 18 times [2023-01-28 10:30:49,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:30:49,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543053925] [2023-01-28 10:30:49,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:30:49,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:30:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:30:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:49,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:30:49,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543053925] [2023-01-28 10:30:49,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543053925] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:30:49,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745282938] [2023-01-28 10:30:49,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:30:49,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:30:49,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:30:49,921 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:30:49,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 10:30:49,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:30:49,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:30:49,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:30:49,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:30:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:50,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:30:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:30:50,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745282938] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:30:50,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:30:50,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-28 10:30:50,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831079472] [2023-01-28 10:30:50,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:30:50,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:30:50,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:30:50,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:30:50,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:30:50,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:30:50,118 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 1030 transitions, 26451 flow. Second operand has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:50,118 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:30:50,118 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:30:50,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:30:53,937 INFO L130 PetriNetUnfolder]: 3726/7375 cut-off events. [2023-01-28 10:30:53,937 INFO L131 PetriNetUnfolder]: For 1467705/1467705 co-relation queries the response was YES. [2023-01-28 10:30:53,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100365 conditions, 7375 events. 3726/7375 cut-off events. For 1467705/1467705 co-relation queries the response was YES. Maximal size of possible extension queue 650. Compared 61838 event pairs, 1357 based on Foata normal form. 96/7471 useless extension candidates. Maximal degree in co-relation 98807. Up to 6093 conditions per place. [2023-01-28 10:30:54,032 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 1043 selfloop transitions, 263 changer transitions 3/1309 dead transitions. [2023-01-28 10:30:54,032 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 1309 transitions, 34648 flow [2023-01-28 10:30:54,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 10:30:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 10:30:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2372 transitions. [2023-01-28 10:30:54,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43635025754231055 [2023-01-28 10:30:54,035 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2372 transitions. [2023-01-28 10:30:54,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2372 transitions. [2023-01-28 10:30:54,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:30:54,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2372 transitions. [2023-01-28 10:30:54,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.88888888888889) internal successors, (2372), 36 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:54,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:54,041 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:30:54,041 INFO L175 Difference]: Start difference. First operand has 420 places, 1030 transitions, 26451 flow. Second operand 36 states and 2372 transitions. [2023-01-28 10:30:54,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 1309 transitions, 34648 flow [2023-01-28 10:31:00,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1309 transitions, 33939 flow, removed 279 selfloop flow, removed 12 redundant places. [2023-01-28 10:31:00,055 INFO L231 Difference]: Finished difference. Result has 457 places, 1131 transitions, 29835 flow [2023-01-28 10:31:00,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=25991, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=29835, PETRI_PLACES=457, PETRI_TRANSITIONS=1131} [2023-01-28 10:31:00,056 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 437 predicate places. [2023-01-28 10:31:00,056 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 1131 transitions, 29835 flow [2023-01-28 10:31:00,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:00,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:00,056 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:00,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-28 10:31:00,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 10:31:00,261 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:00,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:00,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2047021096, now seen corresponding path program 19 times [2023-01-28 10:31:00,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:00,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455729105] [2023-01-28 10:31:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:00,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:00,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:00,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455729105] [2023-01-28 10:31:00,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455729105] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:00,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332519076] [2023-01-28 10:31:00,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:31:00,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:00,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:00,390 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:31:00,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 10:31:00,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:00,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:31:00,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:00,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:00,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:00,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332519076] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:00,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:00,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-01-28 10:31:00,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023448332] [2023-01-28 10:31:00,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:00,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-01-28 10:31:00,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:00,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-01-28 10:31:00,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-01-28 10:31:00,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:31:00,572 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 1131 transitions, 29835 flow. Second operand has 16 states, 16 states have (on average 61.8125) internal successors, (989), 16 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:00,572 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:00,572 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:31:00,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:04,420 INFO L130 PetriNetUnfolder]: 3929/7754 cut-off events. [2023-01-28 10:31:04,420 INFO L131 PetriNetUnfolder]: For 1847116/1847116 co-relation queries the response was YES. [2023-01-28 10:31:04,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108331 conditions, 7754 events. 3929/7754 cut-off events. For 1847116/1847116 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 65401 event pairs, 1523 based on Foata normal form. 140/7894 useless extension candidates. Maximal degree in co-relation 107213. Up to 6927 conditions per place. [2023-01-28 10:31:04,516 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 1158 selfloop transitions, 186 changer transitions 4/1348 dead transitions. [2023-01-28 10:31:04,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1348 transitions, 35943 flow [2023-01-28 10:31:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 10:31:04,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 10:31:04,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2368 transitions. [2023-01-28 10:31:04,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43561442236938924 [2023-01-28 10:31:04,520 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2368 transitions. [2023-01-28 10:31:04,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2368 transitions. [2023-01-28 10:31:04,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:04,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2368 transitions. [2023-01-28 10:31:04,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 65.77777777777777) internal successors, (2368), 36 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:04,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:04,527 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 151.0) internal successors, (5587), 37 states have internal predecessors, (5587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:04,527 INFO L175 Difference]: Start difference. First operand has 457 places, 1131 transitions, 29835 flow. Second operand 36 states and 2368 transitions. [2023-01-28 10:31:04,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1348 transitions, 35943 flow [2023-01-28 10:31:11,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 1348 transitions, 34927 flow, removed 427 selfloop flow, removed 15 redundant places. [2023-01-28 10:31:11,917 INFO L231 Difference]: Finished difference. Result has 493 places, 1210 transitions, 31314 flow [2023-01-28 10:31:11,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=28819, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31314, PETRI_PLACES=493, PETRI_TRANSITIONS=1210} [2023-01-28 10:31:11,918 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 473 predicate places. [2023-01-28 10:31:11,918 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1210 transitions, 31314 flow [2023-01-28 10:31:11,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.8125) internal successors, (989), 16 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:11,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:11,918 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:11,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 10:31:12,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:12,123 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:12,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash -447011944, now seen corresponding path program 20 times [2023-01-28 10:31:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:12,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665456481] [2023-01-28 10:31:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:12,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:12,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:12,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665456481] [2023-01-28 10:31:12,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665456481] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:12,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234988864] [2023-01-28 10:31:12,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:31:12,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:12,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:12,317 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:31:12,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 10:31:12,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:31:12,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:12,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:31:12,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:12,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:12,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:12,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234988864] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:12,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:12,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-01-28 10:31:12,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634861133] [2023-01-28 10:31:12,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:12,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:31:12,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:12,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:31:12,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-01-28 10:31:12,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:31:12,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1210 transitions, 31314 flow. Second operand has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:12,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:12,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:31:12,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:18,459 INFO L130 PetriNetUnfolder]: 4369/8746 cut-off events. [2023-01-28 10:31:18,460 INFO L131 PetriNetUnfolder]: For 2475670/2475670 co-relation queries the response was YES. [2023-01-28 10:31:18,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129968 conditions, 8746 events. 4369/8746 cut-off events. For 2475670/2475670 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 76357 event pairs, 753 based on Foata normal form. 66/8812 useless extension candidates. Maximal degree in co-relation 128951. Up to 3024 conditions per place. [2023-01-28 10:31:18,598 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 654 selfloop transitions, 859 changer transitions 15/1528 dead transitions. [2023-01-28 10:31:18,598 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 1528 transitions, 41320 flow [2023-01-28 10:31:18,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-01-28 10:31:18,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-01-28 10:31:18,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2276 transitions. [2023-01-28 10:31:18,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433190494740943 [2023-01-28 10:31:18,601 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2276 transitions. [2023-01-28 10:31:18,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2276 transitions. [2023-01-28 10:31:18,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:18,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2276 transitions. [2023-01-28 10:31:18,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 66.94117647058823) internal successors, (2276), 34 states have internal predecessors, (2276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:18,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 151.0) internal successors, (5285), 35 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:18,607 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 151.0) internal successors, (5285), 35 states have internal predecessors, (5285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:18,607 INFO L175 Difference]: Start difference. First operand has 493 places, 1210 transitions, 31314 flow. Second operand 34 states and 2276 transitions. [2023-01-28 10:31:18,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 1528 transitions, 41320 flow [2023-01-28 10:31:28,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1528 transitions, 39723 flow, removed 731 selfloop flow, removed 10 redundant places. [2023-01-28 10:31:28,298 INFO L231 Difference]: Finished difference. Result has 531 places, 1327 transitions, 36308 flow [2023-01-28 10:31:28,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=30014, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=746, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=36308, PETRI_PLACES=531, PETRI_TRANSITIONS=1327} [2023-01-28 10:31:28,300 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 511 predicate places. [2023-01-28 10:31:28,300 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 1327 transitions, 36308 flow [2023-01-28 10:31:28,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:28,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:28,300 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:28,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 10:31:28,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:28,505 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:28,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:28,505 INFO L85 PathProgramCache]: Analyzing trace with hash -431522972, now seen corresponding path program 21 times [2023-01-28 10:31:28,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:28,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292797856] [2023-01-28 10:31:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:28,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:28,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:28,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292797856] [2023-01-28 10:31:28,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292797856] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:28,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597442880] [2023-01-28 10:31:28,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:31:28,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:28,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:28,670 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:31:28,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 10:31:28,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 10:31:28,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:28,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:31:28,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:28,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:28,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:28,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597442880] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:28,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:28,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2023-01-28 10:31:28,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465363265] [2023-01-28 10:31:28,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:28,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:31:28,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:28,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:31:28,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2023-01-28 10:31:28,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:31:28,894 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 1327 transitions, 36308 flow. Second operand has 21 states, 21 states have (on average 61.57142857142857) internal successors, (1293), 21 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:28,894 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:28,894 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:31:28,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:35,223 INFO L130 PetriNetUnfolder]: 4343/8662 cut-off events. [2023-01-28 10:31:35,224 INFO L131 PetriNetUnfolder]: For 2683576/2683576 co-relation queries the response was YES. [2023-01-28 10:31:35,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137974 conditions, 8662 events. 4343/8662 cut-off events. For 2683576/2683576 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 75308 event pairs, 309 based on Foata normal form. 22/8684 useless extension candidates. Maximal degree in co-relation 136861. Up to 2242 conditions per place. [2023-01-28 10:31:35,342 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 462 selfloop transitions, 1043 changer transitions 20/1525 dead transitions. [2023-01-28 10:31:35,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 1525 transitions, 43576 flow [2023-01-28 10:31:35,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-01-28 10:31:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-01-28 10:31:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3426 transitions. [2023-01-28 10:31:35,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4280894664500812 [2023-01-28 10:31:35,351 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3426 transitions. [2023-01-28 10:31:35,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3426 transitions. [2023-01-28 10:31:35,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:35,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3426 transitions. [2023-01-28 10:31:35,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 64.64150943396227) internal successors, (3426), 53 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:35,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 151.0) internal successors, (8154), 54 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:35,358 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 151.0) internal successors, (8154), 54 states have internal predecessors, (8154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:35,358 INFO L175 Difference]: Start difference. First operand has 531 places, 1327 transitions, 36308 flow. Second operand 53 states and 3426 transitions. [2023-01-28 10:31:35,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 1525 transitions, 43576 flow [2023-01-28 10:31:47,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1525 transitions, 42749 flow, removed 368 selfloop flow, removed 14 redundant places. [2023-01-28 10:31:47,059 INFO L231 Difference]: Finished difference. Result has 576 places, 1372 transitions, 39675 flow [2023-01-28 10:31:47,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=35525, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=39675, PETRI_PLACES=576, PETRI_TRANSITIONS=1372} [2023-01-28 10:31:47,061 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 556 predicate places. [2023-01-28 10:31:47,061 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1372 transitions, 39675 flow [2023-01-28 10:31:47,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 61.57142857142857) internal successors, (1293), 21 states have internal predecessors, (1293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:47,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:31:47,061 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:31:47,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-28 10:31:47,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 10:31:47,266 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:31:47,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:31:47,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1260313288, now seen corresponding path program 22 times [2023-01-28 10:31:47,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:31:47,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292979627] [2023-01-28 10:31:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:31:47,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:31:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:31:47,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:47,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:31:47,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292979627] [2023-01-28 10:31:47,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292979627] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:31:47,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264717807] [2023-01-28 10:31:47,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:31:47,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:31:47,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:31:47,379 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:31:47,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 10:31:47,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:31:47,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:31:47,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjunts are in the unsatisfiable core [2023-01-28 10:31:47,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:31:47,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:47,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:31:47,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:31:47,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264717807] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:31:47,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:31:47,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-01-28 10:31:47,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010572754] [2023-01-28 10:31:47,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:31:47,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 10:31:47,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:31:47,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 10:31:47,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-01-28 10:31:47,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:31:47,561 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1372 transitions, 39675 flow. Second operand has 17 states, 17 states have (on average 61.705882352941174) internal successors, (1049), 17 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:47,561 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:31:47,561 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:31:47,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:31:52,895 INFO L130 PetriNetUnfolder]: 4554/9035 cut-off events. [2023-01-28 10:31:52,895 INFO L131 PetriNetUnfolder]: For 2969489/2969489 co-relation queries the response was YES. [2023-01-28 10:31:52,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145649 conditions, 9035 events. 4554/9035 cut-off events. For 2969489/2969489 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 78522 event pairs, 1398 based on Foata normal form. 70/9105 useless extension candidates. Maximal degree in co-relation 144763. Up to 6692 conditions per place. [2023-01-28 10:31:53,021 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1085 selfloop transitions, 463 changer transitions 21/1569 dead transitions. [2023-01-28 10:31:53,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 603 places, 1569 transitions, 47022 flow [2023-01-28 10:31:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 10:31:53,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 10:31:53,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1911 transitions. [2023-01-28 10:31:53,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43640100479561544 [2023-01-28 10:31:53,023 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1911 transitions. [2023-01-28 10:31:53,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1911 transitions. [2023-01-28 10:31:53,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:31:53,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1911 transitions. [2023-01-28 10:31:53,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 65.89655172413794) internal successors, (1911), 29 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:53,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 151.0) internal successors, (4530), 30 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:53,027 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 151.0) internal successors, (4530), 30 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:31:53,027 INFO L175 Difference]: Start difference. First operand has 576 places, 1372 transitions, 39675 flow. Second operand 29 states and 1911 transitions. [2023-01-28 10:31:53,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 603 places, 1569 transitions, 47022 flow [2023-01-28 10:32:06,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 1569 transitions, 44869 flow, removed 842 selfloop flow, removed 19 redundant places. [2023-01-28 10:32:06,695 INFO L231 Difference]: Finished difference. Result has 592 places, 1442 transitions, 41737 flow [2023-01-28 10:32:06,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=37992, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=933, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=41737, PETRI_PLACES=592, PETRI_TRANSITIONS=1442} [2023-01-28 10:32:06,696 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 572 predicate places. [2023-01-28 10:32:06,697 INFO L495 AbstractCegarLoop]: Abstraction has has 592 places, 1442 transitions, 41737 flow [2023-01-28 10:32:06,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.705882352941174) internal successors, (1049), 17 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:06,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:32:06,697 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:32:06,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-01-28 10:32:06,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 10:32:06,901 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:32:06,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:32:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1434236764, now seen corresponding path program 23 times [2023-01-28 10:32:06,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:32:06,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130123866] [2023-01-28 10:32:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:32:06,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:32:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:32:07,005 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 10:32:07,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:32:07,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130123866] [2023-01-28 10:32:07,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130123866] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:32:07,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199589480] [2023-01-28 10:32:07,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 10:32:07,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:32:07,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:32:07,006 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:32:07,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 10:32:07,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 10:32:07,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:32:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2023-01-28 10:32:07,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:32:07,127 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 10:32:07,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:32:07,192 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 10:32:07,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199589480] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:32:07,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:32:07,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 10:32:07,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099669515] [2023-01-28 10:32:07,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:32:07,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 10:32:07,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:32:07,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 10:32:07,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-01-28 10:32:07,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 151 [2023-01-28 10:32:07,194 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 592 places, 1442 transitions, 41737 flow. Second operand has 13 states, 13 states have (on average 64.46153846153847) internal successors, (838), 13 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:07,194 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:32:07,194 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 151 [2023-01-28 10:32:07,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:32:13,446 INFO L130 PetriNetUnfolder]: 5686/11328 cut-off events. [2023-01-28 10:32:13,446 INFO L131 PetriNetUnfolder]: For 3857478/3857478 co-relation queries the response was YES. [2023-01-28 10:32:13,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191662 conditions, 11328 events. 5686/11328 cut-off events. For 3857478/3857478 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 102236 event pairs, 603 based on Foata normal form. 194/11522 useless extension candidates. Maximal degree in co-relation 190401. Up to 5610 conditions per place. [2023-01-28 10:32:13,611 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1065 selfloop transitions, 701 changer transitions 149/1917 dead transitions. [2023-01-28 10:32:13,611 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 595 places, 1917 transitions, 59403 flow [2023-01-28 10:32:13,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-28 10:32:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-28 10:32:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 495 transitions. [2023-01-28 10:32:13,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46830652790917693 [2023-01-28 10:32:13,612 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 495 transitions. [2023-01-28 10:32:13,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 495 transitions. [2023-01-28 10:32:13,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:32:13,612 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 495 transitions. [2023-01-28 10:32:13,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 70.71428571428571) internal successors, (495), 7 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:13,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:13,616 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 151.0) internal successors, (1208), 8 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:13,616 INFO L175 Difference]: Start difference. First operand has 592 places, 1442 transitions, 41737 flow. Second operand 7 states and 495 transitions. [2023-01-28 10:32:13,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 595 places, 1917 transitions, 59403 flow [2023-01-28 10:32:31,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 1917 transitions, 58893 flow, removed 167 selfloop flow, removed 19 redundant places. [2023-01-28 10:32:31,381 INFO L231 Difference]: Finished difference. Result has 580 places, 1641 transitions, 52029 flow [2023-01-28 10:32:31,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=41214, PETRI_DIFFERENCE_MINUEND_PLACES=570, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=52029, PETRI_PLACES=580, PETRI_TRANSITIONS=1641} [2023-01-28 10:32:31,382 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 560 predicate places. [2023-01-28 10:32:31,383 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 1641 transitions, 52029 flow [2023-01-28 10:32:31,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 64.46153846153847) internal successors, (838), 13 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:31,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:32:31,383 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:32:31,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-01-28 10:32:31,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 10:32:31,587 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:32:31,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:32:31,588 INFO L85 PathProgramCache]: Analyzing trace with hash -145152391, now seen corresponding path program 24 times [2023-01-28 10:32:31,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:32:31,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470255336] [2023-01-28 10:32:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:32:31,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:32:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:32:31,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:32:31,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:32:31,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470255336] [2023-01-28 10:32:31,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470255336] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:32:31,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048821129] [2023-01-28 10:32:31,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 10:32:31,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:32:31,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:32:31,710 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:32:31,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 10:32:31,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 10:32:31,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:32:31,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 10:32:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:32:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:32:31,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:32:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:32:31,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048821129] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:32:31,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:32:31,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-01-28 10:32:31,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645239074] [2023-01-28 10:32:31,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:32:31,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 10:32:31,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:32:31,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 10:32:31,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2023-01-28 10:32:31,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:32:31,946 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 1641 transitions, 52029 flow. Second operand has 19 states, 19 states have (on average 61.94736842105263) internal successors, (1177), 19 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:31,946 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:32:31,946 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:32:31,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:32:44,001 INFO L130 PetriNetUnfolder]: 9340/18621 cut-off events. [2023-01-28 10:32:44,001 INFO L131 PetriNetUnfolder]: For 6470012/6470012 co-relation queries the response was YES. [2023-01-28 10:32:44,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314644 conditions, 18621 events. 9340/18621 cut-off events. For 6470012/6470012 co-relation queries the response was YES. Maximal size of possible extension queue 1456. Compared 179437 event pairs, 1197 based on Foata normal form. 166/18787 useless extension candidates. Maximal degree in co-relation 312947. Up to 6831 conditions per place. [2023-01-28 10:32:44,306 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 2495 selfloop transitions, 630 changer transitions 2/3127 dead transitions. [2023-01-28 10:32:44,307 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 3127 transitions, 101680 flow [2023-01-28 10:32:44,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 10:32:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 10:32:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1739 transitions. [2023-01-28 10:32:44,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44294447274579724 [2023-01-28 10:32:44,308 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1739 transitions. [2023-01-28 10:32:44,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1739 transitions. [2023-01-28 10:32:44,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:32:44,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1739 transitions. [2023-01-28 10:32:44,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 66.88461538461539) internal successors, (1739), 26 states have internal predecessors, (1739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:44,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:44,312 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 151.0) internal successors, (4077), 27 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:32:44,312 INFO L175 Difference]: Start difference. First operand has 580 places, 1641 transitions, 52029 flow. Second operand 26 states and 1739 transitions. [2023-01-28 10:32:44,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 3127 transitions, 101680 flow [2023-01-28 10:33:19,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 3127 transitions, 100162 flow, removed 692 selfloop flow, removed 16 redundant places. [2023-01-28 10:33:19,644 INFO L231 Difference]: Finished difference. Result has 582 places, 2016 transitions, 64382 flow [2023-01-28 10:33:19,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=51163, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=64382, PETRI_PLACES=582, PETRI_TRANSITIONS=2016} [2023-01-28 10:33:19,646 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 562 predicate places. [2023-01-28 10:33:19,646 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 2016 transitions, 64382 flow [2023-01-28 10:33:19,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 61.94736842105263) internal successors, (1177), 19 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:33:19,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:33:19,647 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:33:19,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 10:33:19,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 10:33:19,849 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:33:19,849 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:33:19,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2084131937, now seen corresponding path program 25 times [2023-01-28 10:33:19,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:33:19,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737927665] [2023-01-28 10:33:19,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:33:19,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:33:19,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:33:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:33:19,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:33:19,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737927665] [2023-01-28 10:33:19,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737927665] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:33:19,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980229710] [2023-01-28 10:33:19,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 10:33:19,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:33:19,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:33:19,985 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:33:19,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 10:33:20,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:33:20,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 10:33:20,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:33:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:33:20,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:33:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:33:20,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980229710] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:33:20,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:33:20,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-01-28 10:33:20,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475268213] [2023-01-28 10:33:20,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:33:20,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 10:33:20,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:33:20,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 10:33:20,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2023-01-28 10:33:20,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:33:20,249 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 2016 transitions, 64382 flow. Second operand has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:33:20,249 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:33:20,249 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:33:20,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:33:35,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 10:33:59,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 10:34:19,310 INFO L130 PetriNetUnfolder]: 10436/21121 cut-off events. [2023-01-28 10:34:19,310 INFO L131 PetriNetUnfolder]: For 7299485/7299485 co-relation queries the response was YES. [2023-01-28 10:34:19,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377370 conditions, 21121 events. 10436/21121 cut-off events. For 7299485/7299485 co-relation queries the response was YES. Maximal size of possible extension queue 1625. Compared 210437 event pairs, 326 based on Foata normal form. 84/21205 useless extension candidates. Maximal degree in co-relation 375631. Up to 4533 conditions per place. [2023-01-28 10:34:19,691 INFO L137 encePairwiseOnDemand]: 145/151 looper letters, 785 selfloop transitions, 2966 changer transitions 72/3823 dead transitions. [2023-01-28 10:34:19,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 691 places, 3823 transitions, 129828 flow [2023-01-28 10:34:19,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-01-28 10:34:19,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2023-01-28 10:34:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 7224 transitions. [2023-01-28 10:34:19,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43491872366044554 [2023-01-28 10:34:19,696 INFO L72 ComplementDD]: Start complementDD. Operand 110 states and 7224 transitions. [2023-01-28 10:34:19,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 7224 transitions. [2023-01-28 10:34:19,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:34:19,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 110 states and 7224 transitions. [2023-01-28 10:34:19,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 111 states, 110 states have (on average 65.67272727272727) internal successors, (7224), 110 states have internal predecessors, (7224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:34:19,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 111 states, 111 states have (on average 151.0) internal successors, (16761), 111 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:34:19,709 INFO L81 ComplementDD]: Finished complementDD. Result has 111 states, 111 states have (on average 151.0) internal successors, (16761), 111 states have internal predecessors, (16761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:34:19,709 INFO L175 Difference]: Start difference. First operand has 582 places, 2016 transitions, 64382 flow. Second operand 110 states and 7224 transitions. [2023-01-28 10:34:19,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 691 places, 3823 transitions, 129828 flow [2023-01-28 10:35:07,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 681 places, 3823 transitions, 127564 flow, removed 1034 selfloop flow, removed 10 redundant places. [2023-01-28 10:35:07,693 INFO L231 Difference]: Finished difference. Result has 718 places, 3250 transitions, 115680 flow [2023-01-28 10:35:07,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=62622, PETRI_DIFFERENCE_MINUEND_PLACES=572, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2016, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1781, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=110, PETRI_FLOW=115680, PETRI_PLACES=718, PETRI_TRANSITIONS=3250} [2023-01-28 10:35:07,695 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 698 predicate places. [2023-01-28 10:35:07,695 INFO L495 AbstractCegarLoop]: Abstraction has has 718 places, 3250 transitions, 115680 flow [2023-01-28 10:35:07,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.47826086956522) internal successors, (1414), 23 states have internal predecessors, (1414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:35:07,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:35:07,696 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:35:07,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 10:35:07,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:35:07,900 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:35:07,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:35:07,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1255341621, now seen corresponding path program 26 times [2023-01-28 10:35:07,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:35:07,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231129465] [2023-01-28 10:35:07,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:35:07,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:35:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:35:08,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:35:08,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:35:08,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231129465] [2023-01-28 10:35:08,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231129465] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:35:08,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522596780] [2023-01-28 10:35:08,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:35:08,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:35:08,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:35:08,024 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:35:08,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 10:35:08,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:35:08,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:35:08,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 10:35:08,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:35:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:35:08,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:35:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:35:08,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522596780] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:35:08,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:35:08,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2023-01-28 10:35:08,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264417909] [2023-01-28 10:35:08,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:35:08,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 10:35:08,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:35:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 10:35:08,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-01-28 10:35:08,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:35:08,283 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 718 places, 3250 transitions, 115680 flow. Second operand has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:35:08,283 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:35:08,283 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:35:08,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:35:44,807 INFO L130 PetriNetUnfolder]: 12396/25172 cut-off events. [2023-01-28 10:35:44,807 INFO L131 PetriNetUnfolder]: For 17538152/17538152 co-relation queries the response was YES. [2023-01-28 10:35:45,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517059 conditions, 25172 events. 12396/25172 cut-off events. For 17538152/17538152 co-relation queries the response was YES. Maximal size of possible extension queue 1853. Compared 257390 event pairs, 1261 based on Foata normal form. 630/25802 useless extension candidates. Maximal degree in co-relation 514695. Up to 5707 conditions per place. [2023-01-28 10:35:45,508 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 2437 selfloop transitions, 1987 changer transitions 90/4514 dead transitions. [2023-01-28 10:35:45,508 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 791 places, 4514 transitions, 161950 flow [2023-01-28 10:35:45,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-01-28 10:35:45,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-01-28 10:35:45,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4961 transitions. [2023-01-28 10:35:45,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43805739514348785 [2023-01-28 10:35:45,517 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4961 transitions. [2023-01-28 10:35:45,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4961 transitions. [2023-01-28 10:35:45,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:35:45,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4961 transitions. [2023-01-28 10:35:45,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 66.14666666666666) internal successors, (4961), 75 states have internal predecessors, (4961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:35:45,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:35:45,540 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 151.0) internal successors, (11476), 76 states have internal predecessors, (11476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:35:45,540 INFO L175 Difference]: Start difference. First operand has 718 places, 3250 transitions, 115680 flow. Second operand 75 states and 4961 transitions. [2023-01-28 10:35:45,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 791 places, 4514 transitions, 161950 flow [2023-01-28 10:38:24,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 4514 transitions, 145713 flow, removed 7641 selfloop flow, removed 26 redundant places. [2023-01-28 10:38:24,298 INFO L231 Difference]: Finished difference. Result has 800 places, 3816 transitions, 129047 flow [2023-01-28 10:38:24,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=103467, PETRI_DIFFERENCE_MINUEND_PLACES=691, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1489, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1733, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=129047, PETRI_PLACES=800, PETRI_TRANSITIONS=3816} [2023-01-28 10:38:24,301 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 780 predicate places. [2023-01-28 10:38:24,301 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 3816 transitions, 129047 flow [2023-01-28 10:38:24,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 61.54545454545455) internal successors, (1354), 22 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:38:24,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:38:24,301 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:38:24,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 10:38:24,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:38:24,506 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:38:24,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:38:24,506 INFO L85 PathProgramCache]: Analyzing trace with hash 2067403275, now seen corresponding path program 27 times [2023-01-28 10:38:24,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:38:24,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419666510] [2023-01-28 10:38:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:38:24,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:38:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:38:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:38:24,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:38:24,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419666510] [2023-01-28 10:38:24,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419666510] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:38:24,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517854125] [2023-01-28 10:38:24,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 10:38:24,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:38:24,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:38:24,646 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:38:24,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 10:38:24,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 10:38:24,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:38:24,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 10:38:24,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:38:24,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:38:24,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:38:24,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:38:24,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517854125] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:38:24,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:38:24,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-01-28 10:38:24,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743061823] [2023-01-28 10:38:24,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:38:24,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 10:38:24,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:38:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 10:38:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2023-01-28 10:38:24,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:38:24,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 3816 transitions, 129047 flow. Second operand has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:38:24,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:38:24,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:38:24,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:39:28,623 INFO L130 PetriNetUnfolder]: 13497/27696 cut-off events. [2023-01-28 10:39:28,624 INFO L131 PetriNetUnfolder]: For 22553315/22553315 co-relation queries the response was YES. [2023-01-28 10:39:29,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608026 conditions, 27696 events. 13497/27696 cut-off events. For 22553315/22553315 co-relation queries the response was YES. Maximal size of possible extension queue 1933. Compared 288041 event pairs, 880 based on Foata normal form. 246/27942 useless extension candidates. Maximal degree in co-relation 606339. Up to 5833 conditions per place. [2023-01-28 10:39:29,707 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 1487 selfloop transitions, 3181 changer transitions 25/4693 dead transitions. [2023-01-28 10:39:29,707 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 892 places, 4693 transitions, 162082 flow [2023-01-28 10:39:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-01-28 10:39:29,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2023-01-28 10:39:29,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 6176 transitions. [2023-01-28 10:39:29,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43979206722210357 [2023-01-28 10:39:29,714 INFO L72 ComplementDD]: Start complementDD. Operand 93 states and 6176 transitions. [2023-01-28 10:39:29,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 6176 transitions. [2023-01-28 10:39:29,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:39:29,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 93 states and 6176 transitions. [2023-01-28 10:39:29,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 94 states, 93 states have (on average 66.40860215053763) internal successors, (6176), 93 states have internal predecessors, (6176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:29,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 94 states, 94 states have (on average 151.0) internal successors, (14194), 94 states have internal predecessors, (14194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:29,740 INFO L81 ComplementDD]: Finished complementDD. Result has 94 states, 94 states have (on average 151.0) internal successors, (14194), 94 states have internal predecessors, (14194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:39:29,740 INFO L175 Difference]: Start difference. First operand has 800 places, 3816 transitions, 129047 flow. Second operand 93 states and 6176 transitions. [2023-01-28 10:39:29,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 892 places, 4693 transitions, 162082 flow [2023-01-28 10:42:28,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 867 places, 4693 transitions, 156933 flow, removed 2060 selfloop flow, removed 25 redundant places. [2023-01-28 10:42:28,879 INFO L231 Difference]: Finished difference. Result has 890 places, 4081 transitions, 140781 flow [2023-01-28 10:42:28,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=151, PETRI_DIFFERENCE_MINUEND_FLOW=123670, PETRI_DIFFERENCE_MINUEND_PLACES=775, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2909, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=93, PETRI_FLOW=140781, PETRI_PLACES=890, PETRI_TRANSITIONS=4081} [2023-01-28 10:42:28,882 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 870 predicate places. [2023-01-28 10:42:28,882 INFO L495 AbstractCegarLoop]: Abstraction has has 890 places, 4081 transitions, 140781 flow [2023-01-28 10:42:28,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 61.608695652173914) internal successors, (1417), 23 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:42:28,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:42:28,882 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:42:28,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-01-28 10:42:29,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-28 10:42:29,087 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 10:42:29,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:42:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash 468633813, now seen corresponding path program 28 times [2023-01-28 10:42:29,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:42:29,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145884371] [2023-01-28 10:42:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:42:29,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:42:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:42:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:42:29,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:42:29,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145884371] [2023-01-28 10:42:29,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145884371] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:42:29,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070729979] [2023-01-28 10:42:29,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 10:42:29,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:42:29,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:42:29,202 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:42:29,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 10:42:29,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 10:42:29,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:42:29,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2023-01-28 10:42:29,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:42:29,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:42:29,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:42:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:42:29,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070729979] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:42:29,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:42:29,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-01-28 10:42:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261622923] [2023-01-28 10:42:29,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:42:29,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 10:42:29,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:42:29,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 10:42:29,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2023-01-28 10:42:29,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 151 [2023-01-28 10:42:29,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 890 places, 4081 transitions, 140781 flow. Second operand has 21 states, 21 states have (on average 61.61904761904762) internal successors, (1294), 21 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:42:29,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:42:29,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 151 [2023-01-28 10:42:29,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:42:39,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-01-28 10:43:30,296 INFO L130 PetriNetUnfolder]: 13856/28341 cut-off events. [2023-01-28 10:43:30,296 INFO L131 PetriNetUnfolder]: For 28791618/28791618 co-relation queries the response was YES. [2023-01-28 10:43:31,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 662351 conditions, 28341 events. 13856/28341 cut-off events. For 28791618/28791618 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 294883 event pairs, 2071 based on Foata normal form. 188/28529 useless extension candidates. Maximal degree in co-relation 660505. Up to 12325 conditions per place. [2023-01-28 10:43:31,293 INFO L137 encePairwiseOnDemand]: 146/151 looper letters, 3454 selfloop transitions, 1191 changer transitions 46/4691 dead transitions. [2023-01-28 10:43:31,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 953 places, 4691 transitions, 164156 flow [2023-01-28 10:43:31,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-01-28 10:43:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-01-28 10:43:31,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4232 transitions. [2023-01-28 10:43:31,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4379139072847682 [2023-01-28 10:43:31,297 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4232 transitions. [2023-01-28 10:43:31,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4232 transitions. [2023-01-28 10:43:31,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:43:31,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4232 transitions. [2023-01-28 10:43:31,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 66.125) internal successors, (4232), 64 states have internal predecessors, (4232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:43:31,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 151.0) internal successors, (9815), 65 states have internal predecessors, (9815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:43:31,304 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 151.0) internal successors, (9815), 65 states have internal predecessors, (9815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:43:31,304 INFO L175 Difference]: Start difference. First operand has 890 places, 4081 transitions, 140781 flow. Second operand 64 states and 4232 transitions. [2023-01-28 10:43:31,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 953 places, 4691 transitions, 164156 flow Received shutdown request... [2023-01-28 10:44:06,539 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 10:44:06,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 10:44:06,572 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 10:44:06,572 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 10:44:06,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:44:06,744 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-28 10:44:06,746 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 10:44:06,746 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 10:44:06,746 INFO L445 BasicCegarLoop]: Path program histogram: [28, 4, 1] [2023-01-28 10:44:06,753 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 10:44:06,753 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 10:44:06,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 10:44:06 BasicIcfg [2023-01-28 10:44:06,767 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 10:44:06,767 INFO L158 Benchmark]: Toolchain (without parser) took 851181.26ms. Allocated memory was 308.3MB in the beginning and 7.5GB in the end (delta: 7.2GB). Free memory was 251.6MB in the beginning and 5.6GB in the end (delta: -5.4GB). Peak memory consumption was 6.6GB. Max. memory is 16.0GB. [2023-01-28 10:44:06,773 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 308.3MB. Free memory is still 257.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 10:44:06,773 INFO L158 Benchmark]: CACSL2BoogieTranslator took 138.41ms. Allocated memory is still 308.3MB. Free memory was 251.3MB in the beginning and 240.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 10:44:06,773 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.49ms. Allocated memory is still 308.3MB. Free memory was 240.5MB in the beginning and 238.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:44:06,773 INFO L158 Benchmark]: Boogie Preprocessor took 17.48ms. Allocated memory is still 308.3MB. Free memory was 238.9MB in the beginning and 237.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 10:44:06,773 INFO L158 Benchmark]: RCFGBuilder took 376.84ms. Allocated memory is still 308.3MB. Free memory was 237.6MB in the beginning and 223.3MB in the end (delta: 14.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 10:44:06,773 INFO L158 Benchmark]: TraceAbstraction took 850606.26ms. Allocated memory was 308.3MB in the beginning and 7.5GB in the end (delta: 7.2GB). Free memory was 222.9MB in the beginning and 5.6GB in the end (delta: -5.4GB). Peak memory consumption was 6.5GB. Max. memory is 16.0GB. [2023-01-28 10:44:06,774 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 308.3MB. Free memory is still 257.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 138.41ms. Allocated memory is still 308.3MB. Free memory was 251.3MB in the beginning and 240.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 36.49ms. Allocated memory is still 308.3MB. Free memory was 240.5MB in the beginning and 238.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 17.48ms. Allocated memory is still 308.3MB. Free memory was 238.9MB in the beginning and 237.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 376.84ms. Allocated memory is still 308.3MB. Free memory was 237.6MB in the beginning and 223.3MB in the end (delta: 14.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 850606.26ms. Allocated memory was 308.3MB in the beginning and 7.5GB in the end (delta: 7.2GB). Free memory was 222.9MB in the beginning and 5.6GB in the end (delta: -5.4GB). Peak memory consumption was 6.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.4s, 73 PlacesBefore, 20 PlacesAfterwards, 72 TransitionsBefore, 15 TransitionsAfterwards, 500 CoEnabledTransitionPairs, 7 FixpointIterations, 38 TrivialSequentialCompositions, 17 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 69 TotalNumberOfCompositions, 583 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 563, independent: 559, independent conditional: 0, independent unconditional: 559, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 283, independent: 281, independent conditional: 0, independent unconditional: 281, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 563, independent: 278, independent conditional: 0, independent unconditional: 278, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 283, unknown conditional: 0, unknown unconditional: 283] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 97 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: 850.5s, OverallIterations: 33, TraceHistogramMax: 4, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 832.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 6486 SdHoareTripleChecker+Valid, 25.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6486 mSDsluCounter, 577 SdHoareTripleChecker+Invalid, 23.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 437 mSDsCounter, 927 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19813 IncrementalHoareTripleChecker+Invalid, 20742 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 927 mSolverCounterUnsat, 140 mSDtfsCounter, 19813 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2790 GetRequests, 1518 SyntacticMatches, 56 SemanticMatches, 1216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22619 ImplicationChecksByTransitivity, 85.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=140781occurred in iteration=32, InterpolantAutomatonStates: 974, 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, 1.0s SatisfiabilityAnalysisTime, 7.8s InterpolantComputationTime, 1105 NumberOfCodeBlocks, 1105 NumberOfCodeBlocksAsserted, 104 NumberOfCheckSat, 1549 ConstructedInterpolants, 0 QuantifiedInterpolants, 9559 SizeOfPredicates, 65 NumberOfNonLiveVariables, 4329 ConjunctsInSsa, 420 ConjunctsInUnsatCore, 95 InterpolantComputations, 3 PerfectInterpolantSequences, 61/745 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