/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-simple-array-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 11:41:14,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 11:41:14,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 11:41:14,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 11:41:14,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 11:41:14,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 11:41:14,042 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 11:41:14,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 11:41:14,058 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 11:41:14,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 11:41:14,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 11:41:14,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 11:41:14,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 11:41:14,060 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 11:41:14,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 11:41:14,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 11:41:14,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 11:41:14,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 11:41:14,064 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 11:41:14,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 11:41:14,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 11:41:14,066 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 11:41:14,067 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 11:41:14,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 11:41:14,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 11:41:14,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 11:41:14,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 11:41:14,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 11:41:14,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 11:41:14,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 11:41:14,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 11:41:14,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 11:41:14,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 11:41:14,072 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 11:41:14,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 11:41:14,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 11:41:14,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 11:41:14,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 11:41:14,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 11:41:14,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 11:41:14,074 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 11:41:14,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 11:41:14,088 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 11:41:14,088 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 11:41:14,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 11:41:14,088 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 11:41:14,089 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 11:41:14,089 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 11:41:14,089 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 11:41:14,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 11:41:14,089 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 11:41:14,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 11:41:14,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 11:41:14,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 11:41:14,090 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 11:41:14,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 11:41:14,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 11:41:14,090 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 11:41:14,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 11:41:14,090 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 11:41:14,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 11:41:14,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 11:41:14,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 11:41:14,091 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 11:41:14,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 11:41:14,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:41:14,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 11:41:14,091 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 11:41:14,091 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 11:41:14,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 11:41:14,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 11:41:14,091 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 11:41:14,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 11:41:14,092 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 11:41:14,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 11:41:14,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 11:41:14,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 11:41:14,290 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 11:41:14,290 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 11:41:14,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-01-28 11:41:15,320 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 11:41:15,462 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 11:41:15,462 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-array-sum.wvr.c [2023-01-28 11:41:15,466 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b2a7c50/fc7d66f18fa64a9a8274719e73dbfe07/FLAG84425aa81 [2023-01-28 11:41:15,476 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53b2a7c50/fc7d66f18fa64a9a8274719e73dbfe07 [2023-01-28 11:41:15,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 11:41:15,479 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 11:41:15,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 11:41:15,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 11:41:15,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 11:41:15,484 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53459208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15, skipping insertion in model container [2023-01-28 11:41:15,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 11:41:15,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 11:41:15,597 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-simple-array-sum.wvr.c[2690,2703] [2023-01-28 11:41:15,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:41:15,607 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 11:41:15,620 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-simple-array-sum.wvr.c[2690,2703] [2023-01-28 11:41:15,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:41:15,627 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:41:15,628 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:41:15,632 INFO L208 MainTranslator]: Completed translation [2023-01-28 11:41:15,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15 WrapperNode [2023-01-28 11:41:15,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 11:41:15,633 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 11:41:15,633 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 11:41:15,633 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 11:41:15,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,642 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,655 INFO L138 Inliner]: procedures = 26, calls = 43, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 124 [2023-01-28 11:41:15,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 11:41:15,656 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 11:41:15,656 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 11:41:15,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 11:41:15,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,668 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,672 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 11:41:15,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 11:41:15,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 11:41:15,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 11:41:15,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (1/1) ... [2023-01-28 11:41:15,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:41:15,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:15,695 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-01-28 11:41:15,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-01-28 11:41:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 11:41:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 11:41:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 11:41:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 11:41:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 11:41:15,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 11:41:15,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 11:41:15,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 11:41:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 11:41:15,739 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 11:41:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 11:41:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 11:41:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 11:41:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 11:41:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 11:41:15,739 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 11:41:15,739 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 11:41:15,740 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 11:41:15,820 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 11:41:15,821 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 11:41:16,075 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 11:41:16,092 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 11:41:16,093 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-01-28 11:41:16,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:41:16 BoogieIcfgContainer [2023-01-28 11:41:16,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 11:41:16,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 11:41:16,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 11:41:16,098 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 11:41:16,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 11:41:15" (1/3) ... [2023-01-28 11:41:16,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a03a475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:41:16, skipping insertion in model container [2023-01-28 11:41:16,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:41:15" (2/3) ... [2023-01-28 11:41:16,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a03a475 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:41:16, skipping insertion in model container [2023-01-28 11:41:16,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:41:16" (3/3) ... [2023-01-28 11:41:16,099 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2023-01-28 11:41:16,111 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 11:41:16,111 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 11:41:16,111 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 11:41:16,172 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 11:41:16,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 174 transitions, 372 flow [2023-01-28 11:41:16,255 INFO L130 PetriNetUnfolder]: 16/171 cut-off events. [2023-01-28 11:41:16,256 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 11:41:16,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 171 events. 16/171 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 119 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 132. Up to 3 conditions per place. [2023-01-28 11:41:16,259 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 174 transitions, 372 flow [2023-01-28 11:41:16,262 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 161 transitions, 340 flow [2023-01-28 11:41:16,264 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 11:41:16,270 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 161 transitions, 340 flow [2023-01-28 11:41:16,272 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 161 transitions, 340 flow [2023-01-28 11:41:16,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 161 transitions, 340 flow [2023-01-28 11:41:16,292 INFO L130 PetriNetUnfolder]: 16/161 cut-off events. [2023-01-28 11:41:16,293 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 11:41:16,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 161 events. 16/161 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 118 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 132. Up to 3 conditions per place. [2023-01-28 11:41:16,295 INFO L119 LiptonReduction]: Number of co-enabled transitions 1720 [2023-01-28 11:41:20,124 INFO L134 LiptonReduction]: Checked pairs total: 2460 [2023-01-28 11:41:20,124 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-01-28 11:41:20,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 11:41:20,150 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;@72177c4b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 11:41:20,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 11:41:20,157 INFO L130 PetriNetUnfolder]: 6/28 cut-off events. [2023-01-28 11:41:20,157 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 11:41:20,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:20,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:20,158 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:20,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:20,162 INFO L85 PathProgramCache]: Analyzing trace with hash 290379782, now seen corresponding path program 1 times [2023-01-28 11:41:20,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:20,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282707723] [2023-01-28 11:41:20,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:20,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:41:20,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:20,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282707723] [2023-01-28 11:41:20,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282707723] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:41:20,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:41:20,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 11:41:20,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369356611] [2023-01-28 11:41:20,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:41:20,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:41:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:20,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:41:20,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:41:20,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 328 [2023-01-28 11:41:20,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:20,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:20,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 328 [2023-01-28 11:41:20,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:20,986 INFO L130 PetriNetUnfolder]: 853/1153 cut-off events. [2023-01-28 11:41:20,986 INFO L131 PetriNetUnfolder]: For 67/67 co-relation queries the response was YES. [2023-01-28 11:41:20,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2389 conditions, 1153 events. 853/1153 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4189 event pairs, 310 based on Foata normal form. 1/690 useless extension candidates. Maximal degree in co-relation 1073. Up to 740 conditions per place. [2023-01-28 11:41:20,995 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 44 selfloop transitions, 5 changer transitions 1/53 dead transitions. [2023-01-28 11:41:20,995 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 53 transitions, 242 flow [2023-01-28 11:41:20,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:41:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:41:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 527 transitions. [2023-01-28 11:41:21,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016768292682927 [2023-01-28 11:41:21,013 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 527 transitions. [2023-01-28 11:41:21,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 527 transitions. [2023-01-28 11:41:21,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:21,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 527 transitions. [2023-01-28 11:41:21,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 131.75) internal successors, (527), 4 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,027 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 328.0) internal successors, (1640), 5 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,028 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 76 flow. Second operand 4 states and 527 transitions. [2023-01-28 11:41:21,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 53 transitions, 242 flow [2023-01-28 11:41:21,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 53 transitions, 218 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 11:41:21,034 INFO L231 Difference]: Finished difference. Result has 32 places, 33 transitions, 98 flow [2023-01-28 11:41:21,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=32, PETRI_TRANSITIONS=33} [2023-01-28 11:41:21,037 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-01-28 11:41:21,037 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 98 flow [2023-01-28 11:41:21,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.5) internal successors, (494), 4 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:21,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:21,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 11:41:21,039 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:21,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:21,039 INFO L85 PathProgramCache]: Analyzing trace with hash 26416036, now seen corresponding path program 1 times [2023-01-28 11:41:21,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:21,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626108866] [2023-01-28 11:41:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:21,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:21,146 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 11:41:21,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:21,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626108866] [2023-01-28 11:41:21,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626108866] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:21,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681998330] [2023-01-28 11:41:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:21,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:21,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:21,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:21,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 11:41:21,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:21,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:41:21,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:21,309 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 11:41:21,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:21,336 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 11:41:21,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681998330] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:21,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 11:41:21,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2023-01-28 11:41:21,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013176921] [2023-01-28 11:41:21,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:41:21,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:41:21,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:21,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:41:21,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-01-28 11:41:21,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 328 [2023-01-28 11:41:21,340 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 125.8) internal successors, (629), 5 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,340 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:21,340 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 328 [2023-01-28 11:41:21,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:21,609 INFO L130 PetriNetUnfolder]: 1545/2124 cut-off events. [2023-01-28 11:41:21,609 INFO L131 PetriNetUnfolder]: For 267/267 co-relation queries the response was YES. [2023-01-28 11:41:21,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4701 conditions, 2124 events. 1545/2124 cut-off events. For 267/267 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 9164 event pairs, 757 based on Foata normal form. 0/1464 useless extension candidates. Maximal degree in co-relation 4470. Up to 1045 conditions per place. [2023-01-28 11:41:21,618 INFO L137 encePairwiseOnDemand]: 323/328 looper letters, 51 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2023-01-28 11:41:21,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 59 transitions, 280 flow [2023-01-28 11:41:21,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:41:21,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:41:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 663 transitions. [2023-01-28 11:41:21,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40426829268292686 [2023-01-28 11:41:21,620 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 663 transitions. [2023-01-28 11:41:21,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 663 transitions. [2023-01-28 11:41:21,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:21,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 663 transitions. [2023-01-28 11:41:21,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,624 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,624 INFO L175 Difference]: Start difference. First operand has 32 places, 33 transitions, 98 flow. Second operand 5 states and 663 transitions. [2023-01-28 11:41:21,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 59 transitions, 280 flow [2023-01-28 11:41:21,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 59 transitions, 272 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 11:41:21,627 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 112 flow [2023-01-28 11:41:21,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=112, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2023-01-28 11:41:21,628 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-01-28 11:41:21,628 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 112 flow [2023-01-28 11:41:21,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.8) internal successors, (629), 5 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:21,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:21,645 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 11:41:21,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:21,834 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:21,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:21,835 INFO L85 PathProgramCache]: Analyzing trace with hash 232148464, now seen corresponding path program 1 times [2023-01-28 11:41:21,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:21,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413413752] [2023-01-28 11:41:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:21,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:21,933 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 11:41:21,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:21,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413413752] [2023-01-28 11:41:21,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413413752] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:41:21,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:41:21,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 11:41:21,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553597667] [2023-01-28 11:41:21,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:41:21,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:41:21,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:21,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:41:21,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 11:41:21,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:21,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 112 flow. Second operand has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:21,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:21,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:21,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:22,099 INFO L130 PetriNetUnfolder]: 1172/1618 cut-off events. [2023-01-28 11:41:22,099 INFO L131 PetriNetUnfolder]: For 166/166 co-relation queries the response was YES. [2023-01-28 11:41:22,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3414 conditions, 1618 events. 1172/1618 cut-off events. For 166/166 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6354 event pairs, 521 based on Foata normal form. 67/1175 useless extension candidates. Maximal degree in co-relation 2060. Up to 793 conditions per place. [2023-01-28 11:41:22,105 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 60 selfloop transitions, 6 changer transitions 0/68 dead transitions. [2023-01-28 11:41:22,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 68 transitions, 324 flow [2023-01-28 11:41:22,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:41:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:41:22,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 656 transitions. [2023-01-28 11:41:22,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-01-28 11:41:22,106 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 656 transitions. [2023-01-28 11:41:22,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 656 transitions. [2023-01-28 11:41:22,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:22,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 656 transitions. [2023-01-28 11:41:22,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,110 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,110 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 112 flow. Second operand 5 states and 656 transitions. [2023-01-28 11:41:22,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 68 transitions, 324 flow [2023-01-28 11:41:22,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 68 transitions, 319 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-28 11:41:22,112 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 120 flow [2023-01-28 11:41:22,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-01-28 11:41:22,112 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-01-28 11:41:22,113 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 120 flow [2023-01-28 11:41:22,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.0) internal successors, (610), 5 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:22,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:22,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 11:41:22,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:22,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:22,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1046469637, now seen corresponding path program 1 times [2023-01-28 11:41:22,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:22,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587797312] [2023-01-28 11:41:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:22,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:41:22,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:22,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587797312] [2023-01-28 11:41:22,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587797312] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:22,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695268113] [2023-01-28 11:41:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:22,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:22,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:22,194 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:22,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 11:41:22,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:22,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 11:41:22,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:41:22,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:22,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:41:22,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695268113] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:22,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 11:41:22,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-01-28 11:41:22,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130412930] [2023-01-28 11:41:22,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:41:22,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:41:22,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:22,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:41:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-28 11:41:22,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:22,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 120 flow. Second operand has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:22,355 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:22,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:22,538 INFO L130 PetriNetUnfolder]: 1052/1471 cut-off events. [2023-01-28 11:41:22,539 INFO L131 PetriNetUnfolder]: For 418/442 co-relation queries the response was YES. [2023-01-28 11:41:22,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3279 conditions, 1471 events. 1052/1471 cut-off events. For 418/442 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6024 event pairs, 377 based on Foata normal form. 24/1116 useless extension candidates. Maximal degree in co-relation 1868. Up to 498 conditions per place. [2023-01-28 11:41:22,544 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 69 selfloop transitions, 7 changer transitions 0/79 dead transitions. [2023-01-28 11:41:22,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 79 transitions, 388 flow [2023-01-28 11:41:22,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:41:22,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:41:22,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 782 transitions. [2023-01-28 11:41:22,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39735772357723576 [2023-01-28 11:41:22,547 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 782 transitions. [2023-01-28 11:41:22,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 782 transitions. [2023-01-28 11:41:22,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:22,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 782 transitions. [2023-01-28 11:41:22,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 130.33333333333334) internal successors, (782), 6 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,551 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 328.0) internal successors, (2296), 7 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,551 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 120 flow. Second operand 6 states and 782 transitions. [2023-01-28 11:41:22,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 79 transitions, 388 flow [2023-01-28 11:41:22,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 79 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-28 11:41:22,553 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 146 flow [2023-01-28 11:41:22,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=146, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2023-01-28 11:41:22,553 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2023-01-28 11:41:22,554 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 146 flow [2023-01-28 11:41:22,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:22,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:22,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:22,759 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 11:41:22,759 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:22,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:22,759 INFO L85 PathProgramCache]: Analyzing trace with hash -709973367, now seen corresponding path program 1 times [2023-01-28 11:41:22,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:22,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860309565] [2023-01-28 11:41:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:22,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:22,824 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 11:41:22,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:22,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860309565] [2023-01-28 11:41:22,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860309565] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:41:22,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:41:22,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 11:41:22,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846803554] [2023-01-28 11:41:22,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:41:22,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:41:22,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:22,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:41:22,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-28 11:41:22,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:22,826 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:22,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:22,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:22,938 INFO L130 PetriNetUnfolder]: 611/889 cut-off events. [2023-01-28 11:41:22,938 INFO L131 PetriNetUnfolder]: For 634/704 co-relation queries the response was YES. [2023-01-28 11:41:22,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2368 conditions, 889 events. 611/889 cut-off events. For 634/704 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3455 event pairs, 290 based on Foata normal form. 70/891 useless extension candidates. Maximal degree in co-relation 1681. Up to 614 conditions per place. [2023-01-28 11:41:22,942 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 26 selfloop transitions, 4 changer transitions 30/62 dead transitions. [2023-01-28 11:41:22,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 326 flow [2023-01-28 11:41:22,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:41:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:41:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-01-28 11:41:22,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3957317073170732 [2023-01-28 11:41:22,944 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-01-28 11:41:22,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-01-28 11:41:22,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:22,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-01-28 11:41:22,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,947 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,947 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 146 flow. Second operand 5 states and 649 transitions. [2023-01-28 11:41:22,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 326 flow [2023-01-28 11:41:22,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 62 transitions, 322 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-01-28 11:41:22,949 INFO L231 Difference]: Finished difference. Result has 49 places, 32 transitions, 127 flow [2023-01-28 11:41:22,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=49, PETRI_TRANSITIONS=32} [2023-01-28 11:41:22,950 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 16 predicate places. [2023-01-28 11:41:22,950 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 32 transitions, 127 flow [2023-01-28 11:41:22,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.2) internal successors, (611), 5 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:22,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:22,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:22,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 11:41:22,951 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:22,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:22,951 INFO L85 PathProgramCache]: Analyzing trace with hash 877946428, now seen corresponding path program 1 times [2023-01-28 11:41:22,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:22,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335828081] [2023-01-28 11:41:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:22,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:23,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:41:23,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:23,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335828081] [2023-01-28 11:41:23,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335828081] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:23,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218431973] [2023-01-28 11:41:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:23,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:23,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:23,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:23,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 11:41:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:23,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 11:41:23,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:23,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:41:23,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:41:23,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218431973] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:23,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 11:41:23,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-01-28 11:41:23,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483096556] [2023-01-28 11:41:23,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:41:23,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:41:23,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:23,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:41:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-28 11:41:23,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:23,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 32 transitions, 127 flow. Second operand has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:23,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:23,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:23,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:23,269 INFO L130 PetriNetUnfolder]: 563/780 cut-off events. [2023-01-28 11:41:23,269 INFO L131 PetriNetUnfolder]: For 486/568 co-relation queries the response was YES. [2023-01-28 11:41:23,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2208 conditions, 780 events. 563/780 cut-off events. For 486/568 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2694 event pairs, 237 based on Foata normal form. 124/807 useless extension candidates. Maximal degree in co-relation 2179. Up to 609 conditions per place. [2023-01-28 11:41:23,272 INFO L137 encePairwiseOnDemand]: 323/328 looper letters, 40 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-01-28 11:41:23,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 46 transitions, 265 flow [2023-01-28 11:41:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:41:23,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:41:23,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 632 transitions. [2023-01-28 11:41:23,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2023-01-28 11:41:23,274 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 632 transitions. [2023-01-28 11:41:23,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 632 transitions. [2023-01-28 11:41:23,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:23,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 632 transitions. [2023-01-28 11:41:23,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:23,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:23,277 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:23,277 INFO L175 Difference]: Start difference. First operand has 49 places, 32 transitions, 127 flow. Second operand 5 states and 632 transitions. [2023-01-28 11:41:23,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 46 transitions, 265 flow [2023-01-28 11:41:23,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 46 transitions, 235 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-01-28 11:41:23,278 INFO L231 Difference]: Finished difference. Result has 41 places, 33 transitions, 121 flow [2023-01-28 11:41:23,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=41, PETRI_TRANSITIONS=33} [2023-01-28 11:41:23,279 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 8 predicate places. [2023-01-28 11:41:23,279 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 33 transitions, 121 flow [2023-01-28 11:41:23,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:23,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:23,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:23,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:23,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:23,484 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:23,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:23,484 INFO L85 PathProgramCache]: Analyzing trace with hash -510812246, now seen corresponding path program 1 times [2023-01-28 11:41:23,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:23,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152942361] [2023-01-28 11:41:23,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:23,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:41:23,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:23,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152942361] [2023-01-28 11:41:23,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152942361] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:23,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067456840] [2023-01-28 11:41:23,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:23,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:23,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:23,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:23,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 11:41:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:23,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 11:41:23,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:41:23,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:41:23,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067456840] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:23,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 11:41:23,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2023-01-28 11:41:23,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564824323] [2023-01-28 11:41:23,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:41:23,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 11:41:23,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:23,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 11:41:23,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-01-28 11:41:23,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:23,706 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 33 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:23,706 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:23,706 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:23,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:23,789 INFO L130 PetriNetUnfolder]: 515/725 cut-off events. [2023-01-28 11:41:23,789 INFO L131 PetriNetUnfolder]: For 631/815 co-relation queries the response was YES. [2023-01-28 11:41:23,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2049 conditions, 725 events. 515/725 cut-off events. For 631/815 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2316 event pairs, 191 based on Foata normal form. 184/806 useless extension candidates. Maximal degree in co-relation 2025. Up to 395 conditions per place. [2023-01-28 11:41:23,792 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 39 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2023-01-28 11:41:23,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 47 transitions, 262 flow [2023-01-28 11:41:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:41:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:41:23,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 631 transitions. [2023-01-28 11:41:23,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847560975609756 [2023-01-28 11:41:23,794 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 631 transitions. [2023-01-28 11:41:23,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 631 transitions. [2023-01-28 11:41:23,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:23,794 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 631 transitions. [2023-01-28 11:41:23,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:23,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:23,797 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 328.0) internal successors, (1968), 6 states have internal predecessors, (1968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:23,797 INFO L175 Difference]: Start difference. First operand has 41 places, 33 transitions, 121 flow. Second operand 5 states and 631 transitions. [2023-01-28 11:41:23,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 47 transitions, 262 flow [2023-01-28 11:41:23,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 251 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-01-28 11:41:23,798 INFO L231 Difference]: Finished difference. Result has 44 places, 35 transitions, 144 flow [2023-01-28 11:41:23,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=44, PETRI_TRANSITIONS=35} [2023-01-28 11:41:23,799 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 11 predicate places. [2023-01-28 11:41:23,799 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 35 transitions, 144 flow [2023-01-28 11:41:23,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 122.8) internal successors, (614), 5 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:23,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:23,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:23,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:24,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:24,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:24,004 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:24,004 INFO L85 PathProgramCache]: Analyzing trace with hash -990804847, now seen corresponding path program 1 times [2023-01-28 11:41:24,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:24,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644692222] [2023-01-28 11:41:24,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:24,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:24,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:41:24,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:24,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644692222] [2023-01-28 11:41:24,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644692222] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:41:24,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:41:24,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-01-28 11:41:24,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120332994] [2023-01-28 11:41:24,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:41:24,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 11:41:24,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:24,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 11:41:24,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-01-28 11:41:24,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 328 [2023-01-28 11:41:24,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 144.5) internal successors, (867), 6 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 11:41:24,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:24,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 328 [2023-01-28 11:41:24,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:24,384 INFO L130 PetriNetUnfolder]: 1096/1546 cut-off events. [2023-01-28 11:41:24,384 INFO L131 PetriNetUnfolder]: For 1643/1861 co-relation queries the response was YES. [2023-01-28 11:41:24,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4800 conditions, 1546 events. 1096/1546 cut-off events. For 1643/1861 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5671 event pairs, 121 based on Foata normal form. 294/1662 useless extension candidates. Maximal degree in co-relation 4774. Up to 530 conditions per place. [2023-01-28 11:41:24,390 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 89 selfloop transitions, 17 changer transitions 13/120 dead transitions. [2023-01-28 11:41:24,390 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 120 transitions, 700 flow [2023-01-28 11:41:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 11:41:24,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 11:41:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1370 transitions. [2023-01-28 11:41:24,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640921409214092 [2023-01-28 11:41:24,393 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1370 transitions. [2023-01-28 11:41:24,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1370 transitions. [2023-01-28 11:41:24,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:24,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1370 transitions. [2023-01-28 11:41:24,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 152.22222222222223) internal successors, (1370), 9 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:24,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:24,398 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:24,398 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 144 flow. Second operand 9 states and 1370 transitions. [2023-01-28 11:41:24,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 120 transitions, 700 flow [2023-01-28 11:41:24,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 120 transitions, 691 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-28 11:41:24,401 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 292 flow [2023-01-28 11:41:24,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=292, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-01-28 11:41:24,402 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 22 predicate places. [2023-01-28 11:41:24,402 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 292 flow [2023-01-28 11:41:24,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.5) internal successors, (867), 6 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 11:41:24,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:24,403 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:24,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 11:41:24,403 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:24,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:24,403 INFO L85 PathProgramCache]: Analyzing trace with hash -849126380, now seen corresponding path program 2 times [2023-01-28 11:41:24,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:24,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369008347] [2023-01-28 11:41:24,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:24,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:41:24,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:24,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369008347] [2023-01-28 11:41:24,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369008347] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:24,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984348978] [2023-01-28 11:41:24,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:41:24,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:24,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:24,491 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:24,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 11:41:24,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:41:24,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:24,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:41:24,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:41:24,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:41:24,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984348978] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:24,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:24,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-01-28 11:41:24,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266626824] [2023-01-28 11:41:24,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:24,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 11:41:24,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:24,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 11:41:24,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-01-28 11:41:24,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:24,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 292 flow. Second operand has 14 states, 14 states have (on average 121.14285714285714) internal successors, (1696), 14 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:24,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:24,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:24,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:24,986 INFO L130 PetriNetUnfolder]: 1332/1958 cut-off events. [2023-01-28 11:41:24,986 INFO L131 PetriNetUnfolder]: For 5356/5834 co-relation queries the response was YES. [2023-01-28 11:41:24,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7451 conditions, 1958 events. 1332/1958 cut-off events. For 5356/5834 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8155 event pairs, 468 based on Foata normal form. 492/2442 useless extension candidates. Maximal degree in co-relation 5385. Up to 1028 conditions per place. [2023-01-28 11:41:24,994 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 57 selfloop transitions, 7 changer transitions 52/120 dead transitions. [2023-01-28 11:41:24,994 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 120 transitions, 888 flow [2023-01-28 11:41:24,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 11:41:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 11:41:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1146 transitions. [2023-01-28 11:41:24,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3882113821138211 [2023-01-28 11:41:24,997 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1146 transitions. [2023-01-28 11:41:24,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1146 transitions. [2023-01-28 11:41:24,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:24,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1146 transitions. [2023-01-28 11:41:25,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.33333333333333) internal successors, (1146), 9 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:25,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:25,003 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 328.0) internal successors, (3280), 10 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:25,003 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 292 flow. Second operand 9 states and 1146 transitions. [2023-01-28 11:41:25,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 120 transitions, 888 flow [2023-01-28 11:41:25,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 864 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-01-28 11:41:25,014 INFO L231 Difference]: Finished difference. Result has 67 places, 52 transitions, 330 flow [2023-01-28 11:41:25,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=330, PETRI_PLACES=67, PETRI_TRANSITIONS=52} [2023-01-28 11:41:25,014 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2023-01-28 11:41:25,015 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 52 transitions, 330 flow [2023-01-28 11:41:25,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 121.14285714285714) internal successors, (1696), 14 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:25,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:25,015 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:25,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:25,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:25,220 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:25,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:25,221 INFO L85 PathProgramCache]: Analyzing trace with hash 123513301, now seen corresponding path program 3 times [2023-01-28 11:41:25,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:25,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574485049] [2023-01-28 11:41:25,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:25,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:25,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 11:41:25,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:25,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574485049] [2023-01-28 11:41:25,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574485049] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:25,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425428995] [2023-01-28 11:41:25,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:41:25,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:25,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:25,335 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:25,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 11:41:25,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:41:25,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:25,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:41:25,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 11:41:25,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 11:41:25,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425428995] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:25,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:25,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-01-28 11:41:25,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795902754] [2023-01-28 11:41:25,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:25,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 11:41:25,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:25,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 11:41:25,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-01-28 11:41:25,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:25,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 52 transitions, 330 flow. Second operand has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:25,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:25,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:25,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:25,766 INFO L130 PetriNetUnfolder]: 1403/2019 cut-off events. [2023-01-28 11:41:25,766 INFO L131 PetriNetUnfolder]: For 5477/5691 co-relation queries the response was YES. [2023-01-28 11:41:25,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7910 conditions, 2019 events. 1403/2019 cut-off events. For 5477/5691 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7974 event pairs, 432 based on Foata normal form. 302/2309 useless extension candidates. Maximal degree in co-relation 7864. Up to 1316 conditions per place. [2023-01-28 11:41:25,777 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 91 selfloop transitions, 8 changer transitions 0/105 dead transitions. [2023-01-28 11:41:25,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 105 transitions, 884 flow [2023-01-28 11:41:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 11:41:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 11:41:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1001 transitions. [2023-01-28 11:41:25,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38147865853658536 [2023-01-28 11:41:25,779 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1001 transitions. [2023-01-28 11:41:25,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1001 transitions. [2023-01-28 11:41:25,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:25,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1001 transitions. [2023-01-28 11:41:25,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 125.125) internal successors, (1001), 8 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:25,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 328.0) internal successors, (2952), 9 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:25,784 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 328.0) internal successors, (2952), 9 states have internal predecessors, (2952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:25,784 INFO L175 Difference]: Start difference. First operand has 67 places, 52 transitions, 330 flow. Second operand 8 states and 1001 transitions. [2023-01-28 11:41:25,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 105 transitions, 884 flow [2023-01-28 11:41:25,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 105 transitions, 846 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-01-28 11:41:25,793 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 336 flow [2023-01-28 11:41:25,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2023-01-28 11:41:25,794 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2023-01-28 11:41:25,794 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 336 flow [2023-01-28 11:41:25,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 120.73333333333333) internal successors, (1811), 15 states have internal predecessors, (1811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:25,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:25,795 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:25,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:26,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:26,000 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:26,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash -18919933, now seen corresponding path program 4 times [2023-01-28 11:41:26,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:26,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090026035] [2023-01-28 11:41:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:26,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 11:41:26,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:26,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090026035] [2023-01-28 11:41:26,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090026035] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:26,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959960114] [2023-01-28 11:41:26,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:41:26,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:26,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:26,143 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:26,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 11:41:26,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:41:26,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:26,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 6 conjunts are in the unsatisfiable core [2023-01-28 11:41:26,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:26,304 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:41:26,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:26,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 11:41:26,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959960114] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:26,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:26,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-01-28 11:41:26,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610374055] [2023-01-28 11:41:26,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:26,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-01-28 11:41:26,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:26,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-01-28 11:41:26,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-01-28 11:41:26,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 328 [2023-01-28 11:41:26,350 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 336 flow. Second operand has 13 states, 13 states have (on average 118.3076923076923) internal successors, (1538), 13 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:26,350 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:26,350 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 328 [2023-01-28 11:41:26,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:26,845 INFO L130 PetriNetUnfolder]: 2106/2946 cut-off events. [2023-01-28 11:41:26,845 INFO L131 PetriNetUnfolder]: For 8707/8747 co-relation queries the response was YES. [2023-01-28 11:41:26,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12356 conditions, 2946 events. 2106/2946 cut-off events. For 8707/8747 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 11180 event pairs, 61 based on Foata normal form. 78/3024 useless extension candidates. Maximal degree in co-relation 12310. Up to 950 conditions per place. [2023-01-28 11:41:26,859 INFO L137 encePairwiseOnDemand]: 317/328 looper letters, 167 selfloop transitions, 37 changer transitions 0/207 dead transitions. [2023-01-28 11:41:26,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 207 transitions, 1724 flow [2023-01-28 11:41:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 11:41:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 11:41:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2083 transitions. [2023-01-28 11:41:26,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37356527977044474 [2023-01-28 11:41:26,863 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2083 transitions. [2023-01-28 11:41:26,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2083 transitions. [2023-01-28 11:41:26,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:26,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2083 transitions. [2023-01-28 11:41:26,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 122.52941176470588) internal successors, (2083), 17 states have internal predecessors, (2083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:26,871 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:26,872 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:26,872 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 336 flow. Second operand 17 states and 2083 transitions. [2023-01-28 11:41:26,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 207 transitions, 1724 flow [2023-01-28 11:41:26,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 207 transitions, 1693 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-01-28 11:41:26,885 INFO L231 Difference]: Finished difference. Result has 85 places, 79 transitions, 678 flow [2023-01-28 11:41:26,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=678, PETRI_PLACES=85, PETRI_TRANSITIONS=79} [2023-01-28 11:41:26,886 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2023-01-28 11:41:26,886 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 79 transitions, 678 flow [2023-01-28 11:41:26,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 118.3076923076923) internal successors, (1538), 13 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:26,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:26,886 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:26,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:27,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:27,091 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:27,092 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:27,092 INFO L85 PathProgramCache]: Analyzing trace with hash -625333260, now seen corresponding path program 5 times [2023-01-28 11:41:27,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:27,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341087691] [2023-01-28 11:41:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:27,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:27,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 11:41:27,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:27,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341087691] [2023-01-28 11:41:27,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341087691] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:27,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439629048] [2023-01-28 11:41:27,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:41:27,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:27,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:27,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:27,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 11:41:27,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 11:41:27,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:27,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:41:27,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 11:41:27,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 11:41:27,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439629048] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:27,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:27,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-01-28 11:41:27,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523520330] [2023-01-28 11:41:27,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:27,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 11:41:27,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:27,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 11:41:27,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-01-28 11:41:27,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 328 [2023-01-28 11:41:27,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 79 transitions, 678 flow. Second operand has 15 states, 15 states have (on average 143.13333333333333) internal successors, (2147), 15 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:27,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:27,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 328 [2023-01-28 11:41:27,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:28,347 INFO L130 PetriNetUnfolder]: 4224/6102 cut-off events. [2023-01-28 11:41:28,348 INFO L131 PetriNetUnfolder]: For 24215/24301 co-relation queries the response was YES. [2023-01-28 11:41:28,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26553 conditions, 6102 events. 4224/6102 cut-off events. For 24215/24301 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 28704 event pairs, 548 based on Foata normal form. 390/6492 useless extension candidates. Maximal degree in co-relation 26499. Up to 1525 conditions per place. [2023-01-28 11:41:28,385 INFO L137 encePairwiseOnDemand]: 322/328 looper letters, 232 selfloop transitions, 54 changer transitions 24/314 dead transitions. [2023-01-28 11:41:28,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 314 transitions, 2629 flow [2023-01-28 11:41:28,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 11:41:28,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 11:41:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2887 transitions. [2023-01-28 11:41:28,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46325417201540436 [2023-01-28 11:41:28,390 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2887 transitions. [2023-01-28 11:41:28,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2887 transitions. [2023-01-28 11:41:28,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:28,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2887 transitions. [2023-01-28 11:41:28,403 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 151.94736842105263) internal successors, (2887), 19 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:28,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 328.0) internal successors, (6560), 20 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:28,410 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 328.0) internal successors, (6560), 20 states have internal predecessors, (6560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:28,410 INFO L175 Difference]: Start difference. First operand has 85 places, 79 transitions, 678 flow. Second operand 19 states and 2887 transitions. [2023-01-28 11:41:28,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 314 transitions, 2629 flow [2023-01-28 11:41:28,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 314 transitions, 2472 flow, removed 47 selfloop flow, removed 6 redundant places. [2023-01-28 11:41:28,481 INFO L231 Difference]: Finished difference. Result has 106 places, 116 transitions, 1185 flow [2023-01-28 11:41:28,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1185, PETRI_PLACES=106, PETRI_TRANSITIONS=116} [2023-01-28 11:41:28,483 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 73 predicate places. [2023-01-28 11:41:28,484 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 116 transitions, 1185 flow [2023-01-28 11:41:28,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 143.13333333333333) internal successors, (2147), 15 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:28,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:28,485 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:28,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:28,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-01-28 11:41:28,704 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:28,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:28,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1824849498, now seen corresponding path program 6 times [2023-01-28 11:41:28,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:28,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405332316] [2023-01-28 11:41:28,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:28,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:28,879 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 11:41:28,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:28,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405332316] [2023-01-28 11:41:28,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405332316] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:28,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501853239] [2023-01-28 11:41:28,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:41:28,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:28,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:28,894 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:28,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 11:41:29,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 11:41:29,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:29,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:41:29,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 11:41:29,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-01-28 11:41:29,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501853239] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:29,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:29,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-01-28 11:41:29,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046770334] [2023-01-28 11:41:29,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:29,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-01-28 11:41:29,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:29,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-01-28 11:41:29,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-01-28 11:41:29,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 328 [2023-01-28 11:41:29,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 116 transitions, 1185 flow. Second operand has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:29,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:29,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 328 [2023-01-28 11:41:29,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:30,054 INFO L130 PetriNetUnfolder]: 5322/7712 cut-off events. [2023-01-28 11:41:30,055 INFO L131 PetriNetUnfolder]: For 37213/37321 co-relation queries the response was YES. [2023-01-28 11:41:30,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37890 conditions, 7712 events. 5322/7712 cut-off events. For 37213/37321 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 37613 event pairs, 319 based on Foata normal form. 184/7895 useless extension candidates. Maximal degree in co-relation 37831. Up to 1943 conditions per place. [2023-01-28 11:41:30,110 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 208 selfloop transitions, 77 changer transitions 24/313 dead transitions. [2023-01-28 11:41:30,110 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 313 transitions, 2910 flow [2023-01-28 11:41:30,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 11:41:30,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 11:41:30,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2584 transitions. [2023-01-28 11:41:30,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2023-01-28 11:41:30,114 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2584 transitions. [2023-01-28 11:41:30,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2584 transitions. [2023-01-28 11:41:30,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:30,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2584 transitions. [2023-01-28 11:41:30,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 152.0) internal successors, (2584), 17 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:30,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:30,126 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:30,126 INFO L175 Difference]: Start difference. First operand has 106 places, 116 transitions, 1185 flow. Second operand 17 states and 2584 transitions. [2023-01-28 11:41:30,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 313 transitions, 2910 flow [2023-01-28 11:41:30,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 313 transitions, 2831 flow, removed 37 selfloop flow, removed 1 redundant places. [2023-01-28 11:41:30,304 INFO L231 Difference]: Finished difference. Result has 127 places, 138 transitions, 1647 flow [2023-01-28 11:41:30,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1114, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1647, PETRI_PLACES=127, PETRI_TRANSITIONS=138} [2023-01-28 11:41:30,305 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 94 predicate places. [2023-01-28 11:41:30,305 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 138 transitions, 1647 flow [2023-01-28 11:41:30,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 143.14285714285714) internal successors, (2004), 14 states have internal predecessors, (2004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:30,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:30,305 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:30,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:30,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 11:41:30,511 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:30,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:30,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1957586289, now seen corresponding path program 7 times [2023-01-28 11:41:30,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:30,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837360948] [2023-01-28 11:41:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:30,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:30,625 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 11:41:30,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:30,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837360948] [2023-01-28 11:41:30,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837360948] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:30,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147786789] [2023-01-28 11:41:30,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:41:30,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:30,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:30,629 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:30,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 11:41:30,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:30,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:41:30,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 11:41:30,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-01-28 11:41:30,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147786789] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:30,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:30,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-01-28 11:41:30,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693624029] [2023-01-28 11:41:30,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:30,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 11:41:30,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:30,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 11:41:30,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-01-28 11:41:30,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:30,905 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 138 transitions, 1647 flow. Second operand has 19 states, 19 states have (on average 120.84210526315789) internal successors, (2296), 19 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:30,905 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:30,905 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:30,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:32,028 INFO L130 PetriNetUnfolder]: 7658/11250 cut-off events. [2023-01-28 11:41:32,029 INFO L131 PetriNetUnfolder]: For 75140/75711 co-relation queries the response was YES. [2023-01-28 11:41:32,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57205 conditions, 11250 events. 7658/11250 cut-off events. For 75140/75711 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 62070 event pairs, 2159 based on Foata normal form. 693/11801 useless extension candidates. Maximal degree in co-relation 54064. Up to 5118 conditions per place. [2023-01-28 11:41:32,196 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 163 selfloop transitions, 9 changer transitions 130/321 dead transitions. [2023-01-28 11:41:32,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 321 transitions, 4057 flow [2023-01-28 11:41:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 11:41:32,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 11:41:32,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1645 transitions. [2023-01-28 11:41:32,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3857879924953096 [2023-01-28 11:41:32,200 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1645 transitions. [2023-01-28 11:41:32,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1645 transitions. [2023-01-28 11:41:32,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:32,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1645 transitions. [2023-01-28 11:41:32,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 126.53846153846153) internal successors, (1645), 13 states have internal predecessors, (1645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:32,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 328.0) internal successors, (4592), 14 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:32,208 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 328.0) internal successors, (4592), 14 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:32,208 INFO L175 Difference]: Start difference. First operand has 127 places, 138 transitions, 1647 flow. Second operand 13 states and 1645 transitions. [2023-01-28 11:41:32,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 321 transitions, 4057 flow [2023-01-28 11:41:32,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 321 transitions, 3807 flow, removed 91 selfloop flow, removed 6 redundant places. [2023-01-28 11:41:32,490 INFO L231 Difference]: Finished difference. Result has 138 places, 140 transitions, 1608 flow [2023-01-28 11:41:32,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1534, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1608, PETRI_PLACES=138, PETRI_TRANSITIONS=140} [2023-01-28 11:41:32,491 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 105 predicate places. [2023-01-28 11:41:32,491 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 140 transitions, 1608 flow [2023-01-28 11:41:32,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 120.84210526315789) internal successors, (2296), 19 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:32,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:32,492 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:32,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:32,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 11:41:32,703 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:32,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:32,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2013782112, now seen corresponding path program 8 times [2023-01-28 11:41:32,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:32,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255625435] [2023-01-28 11:41:32,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:32,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-01-28 11:41:32,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255625435] [2023-01-28 11:41:32,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255625435] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512346271] [2023-01-28 11:41:32,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:41:32,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:32,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:32,872 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:32,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 11:41:32,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:41:32,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:32,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:41:32,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:33,058 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-01-28 11:41:33,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:33,132 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-01-28 11:41:33,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512346271] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:33,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:33,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-01-28 11:41:33,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355453077] [2023-01-28 11:41:33,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:33,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 11:41:33,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:33,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 11:41:33,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-01-28 11:41:33,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:33,135 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 140 transitions, 1608 flow. Second operand has 20 states, 20 states have (on average 120.2) internal successors, (2404), 20 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:33,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:33,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:33,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:34,079 INFO L130 PetriNetUnfolder]: 6434/9178 cut-off events. [2023-01-28 11:41:34,079 INFO L131 PetriNetUnfolder]: For 57039/57404 co-relation queries the response was YES. [2023-01-28 11:41:34,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47464 conditions, 9178 events. 6434/9178 cut-off events. For 57039/57404 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 45952 event pairs, 1922 based on Foata normal form. 635/9672 useless extension candidates. Maximal degree in co-relation 47382. Up to 5194 conditions per place. [2023-01-28 11:41:34,135 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 276 selfloop transitions, 17 changer transitions 60/371 dead transitions. [2023-01-28 11:41:34,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 371 transitions, 5036 flow [2023-01-28 11:41:34,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 11:41:34,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 11:41:34,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1370 transitions. [2023-01-28 11:41:34,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37971175166297116 [2023-01-28 11:41:34,137 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1370 transitions. [2023-01-28 11:41:34,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1370 transitions. [2023-01-28 11:41:34,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:34,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1370 transitions. [2023-01-28 11:41:34,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 124.54545454545455) internal successors, (1370), 11 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:34,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 328.0) internal successors, (3936), 12 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:34,143 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 328.0) internal successors, (3936), 12 states have internal predecessors, (3936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:34,143 INFO L175 Difference]: Start difference. First operand has 138 places, 140 transitions, 1608 flow. Second operand 11 states and 1370 transitions. [2023-01-28 11:41:34,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 371 transitions, 5036 flow [2023-01-28 11:41:34,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 371 transitions, 4894 flow, removed 63 selfloop flow, removed 7 redundant places. [2023-01-28 11:41:34,438 INFO L231 Difference]: Finished difference. Result has 135 places, 126 transitions, 1421 flow [2023-01-28 11:41:34,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1553, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1421, PETRI_PLACES=135, PETRI_TRANSITIONS=126} [2023-01-28 11:41:34,438 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 102 predicate places. [2023-01-28 11:41:34,439 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 126 transitions, 1421 flow [2023-01-28 11:41:34,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 120.2) internal successors, (2404), 20 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:34,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:34,439 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:34,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:34,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 11:41:34,644 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:34,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:34,645 INFO L85 PathProgramCache]: Analyzing trace with hash -816507476, now seen corresponding path program 9 times [2023-01-28 11:41:34,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:34,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721998495] [2023-01-28 11:41:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:34,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 11:41:34,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:34,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721998495] [2023-01-28 11:41:34,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721998495] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:34,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707470819] [2023-01-28 11:41:34,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:41:34,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:34,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:34,810 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:34,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 11:41:35,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:41:35,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:35,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:41:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:35,144 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 11:41:35,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 11:41:35,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707470819] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:35,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:35,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-01-28 11:41:35,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731812161] [2023-01-28 11:41:35,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:35,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 11:41:35,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:35,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 11:41:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2023-01-28 11:41:35,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:35,255 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 126 transitions, 1421 flow. Second operand has 20 states, 20 states have (on average 120.75) internal successors, (2415), 20 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:35,255 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:35,255 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:35,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:36,100 INFO L130 PetriNetUnfolder]: 5413/7679 cut-off events. [2023-01-28 11:41:36,100 INFO L131 PetriNetUnfolder]: For 46210/46350 co-relation queries the response was YES. [2023-01-28 11:41:36,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42148 conditions, 7679 events. 5413/7679 cut-off events. For 46210/46350 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 35293 event pairs, 594 based on Foata normal form. 178/7842 useless extension candidates. Maximal degree in co-relation 42070. Up to 4104 conditions per place. [2023-01-28 11:41:36,167 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 148 selfloop transitions, 46 changer transitions 0/201 dead transitions. [2023-01-28 11:41:36,167 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 201 transitions, 2416 flow [2023-01-28 11:41:36,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-01-28 11:41:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-01-28 11:41:36,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1500 transitions. [2023-01-28 11:41:36,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2023-01-28 11:41:36,169 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1500 transitions. [2023-01-28 11:41:36,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1500 transitions. [2023-01-28 11:41:36,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:36,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1500 transitions. [2023-01-28 11:41:36,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 125.0) internal successors, (1500), 12 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:36,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 328.0) internal successors, (4264), 13 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:36,175 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 328.0) internal successors, (4264), 13 states have internal predecessors, (4264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:36,175 INFO L175 Difference]: Start difference. First operand has 135 places, 126 transitions, 1421 flow. Second operand 12 states and 1500 transitions. [2023-01-28 11:41:36,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 201 transitions, 2416 flow [2023-01-28 11:41:36,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 201 transitions, 2264 flow, removed 41 selfloop flow, removed 12 redundant places. [2023-01-28 11:41:36,399 INFO L231 Difference]: Finished difference. Result has 136 places, 135 transitions, 1589 flow [2023-01-28 11:41:36,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1589, PETRI_PLACES=136, PETRI_TRANSITIONS=135} [2023-01-28 11:41:36,400 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 103 predicate places. [2023-01-28 11:41:36,400 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 135 transitions, 1589 flow [2023-01-28 11:41:36,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 120.75) internal successors, (2415), 20 states have internal predecessors, (2415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:36,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:36,400 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:36,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:36,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 11:41:36,606 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:36,606 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:36,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1011768859, now seen corresponding path program 10 times [2023-01-28 11:41:36,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:36,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873466671] [2023-01-28 11:41:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:36,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 11:41:36,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:36,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873466671] [2023-01-28 11:41:36,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873466671] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:36,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953730417] [2023-01-28 11:41:36,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:41:36,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:36,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:36,801 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:36,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 11:41:37,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:41:37,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:37,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 11:41:37,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:37,115 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 11:41:37,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-01-28 11:41:37,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953730417] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:37,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:37,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2023-01-28 11:41:37,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235428727] [2023-01-28 11:41:37,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:37,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 11:41:37,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:37,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 11:41:37,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-01-28 11:41:37,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 328 [2023-01-28 11:41:37,186 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 135 transitions, 1589 flow. Second operand has 17 states, 17 states have (on average 143.05882352941177) internal successors, (2432), 17 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:37,186 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:37,186 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 328 [2023-01-28 11:41:37,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:38,686 INFO L130 PetriNetUnfolder]: 7450/10528 cut-off events. [2023-01-28 11:41:38,686 INFO L131 PetriNetUnfolder]: For 58408/58530 co-relation queries the response was YES. [2023-01-28 11:41:38,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55880 conditions, 10528 events. 7450/10528 cut-off events. For 58408/58530 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 49706 event pairs, 449 based on Foata normal form. 210/10738 useless extension candidates. Maximal degree in co-relation 55803. Up to 2092 conditions per place. [2023-01-28 11:41:38,744 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 342 selfloop transitions, 104 changer transitions 52/502 dead transitions. [2023-01-28 11:41:38,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 502 transitions, 4850 flow [2023-01-28 11:41:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 11:41:38,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 11:41:38,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 4253 transitions. [2023-01-28 11:41:38,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630879790940767 [2023-01-28 11:41:38,748 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 4253 transitions. [2023-01-28 11:41:38,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 4253 transitions. [2023-01-28 11:41:38,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:38,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 4253 transitions. [2023-01-28 11:41:38,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 151.89285714285714) internal successors, (4253), 28 states have internal predecessors, (4253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:38,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 328.0) internal successors, (9512), 29 states have internal predecessors, (9512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:38,758 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 328.0) internal successors, (9512), 29 states have internal predecessors, (9512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:38,758 INFO L175 Difference]: Start difference. First operand has 136 places, 135 transitions, 1589 flow. Second operand 28 states and 4253 transitions. [2023-01-28 11:41:38,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 502 transitions, 4850 flow [2023-01-28 11:41:39,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 502 transitions, 4785 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-01-28 11:41:39,050 INFO L231 Difference]: Finished difference. Result has 161 places, 169 transitions, 2319 flow [2023-01-28 11:41:39,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2319, PETRI_PLACES=161, PETRI_TRANSITIONS=169} [2023-01-28 11:41:39,050 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 128 predicate places. [2023-01-28 11:41:39,050 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 169 transitions, 2319 flow [2023-01-28 11:41:39,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 143.05882352941177) internal successors, (2432), 17 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:39,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:39,051 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:39,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:39,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 11:41:39,257 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:39,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:39,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1542560206, now seen corresponding path program 11 times [2023-01-28 11:41:39,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:39,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681913734] [2023-01-28 11:41:39,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:39,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-01-28 11:41:39,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:39,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681913734] [2023-01-28 11:41:39,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681913734] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:39,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587339405] [2023-01-28 11:41:39,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:41:39,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:39,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:39,417 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:39,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 11:41:39,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-01-28 11:41:39,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:39,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 11:41:39,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-01-28 11:41:39,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-01-28 11:41:40,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587339405] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:40,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:40,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 23 [2023-01-28 11:41:40,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765922690] [2023-01-28 11:41:40,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:40,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 11:41:40,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 11:41:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2023-01-28 11:41:40,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:40,035 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 169 transitions, 2319 flow. Second operand has 24 states, 24 states have (on average 120.54166666666667) internal successors, (2893), 24 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:40,035 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:40,035 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:40,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:41,998 INFO L130 PetriNetUnfolder]: 11441/16325 cut-off events. [2023-01-28 11:41:41,998 INFO L131 PetriNetUnfolder]: For 131859/132679 co-relation queries the response was YES. [2023-01-28 11:41:42,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92371 conditions, 16325 events. 11441/16325 cut-off events. For 131859/132679 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 87768 event pairs, 2900 based on Foata normal form. 810/16929 useless extension candidates. Maximal degree in co-relation 87325. Up to 6780 conditions per place. [2023-01-28 11:41:42,095 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 205 selfloop transitions, 11 changer transitions 226/464 dead transitions. [2023-01-28 11:41:42,095 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 464 transitions, 6616 flow [2023-01-28 11:41:42,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 11:41:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 11:41:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2145 transitions. [2023-01-28 11:41:42,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38468436154949787 [2023-01-28 11:41:42,098 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2145 transitions. [2023-01-28 11:41:42,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2145 transitions. [2023-01-28 11:41:42,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:42,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2145 transitions. [2023-01-28 11:41:42,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 126.17647058823529) internal successors, (2145), 17 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:42,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:42,103 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 328.0) internal successors, (5904), 18 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:42,103 INFO L175 Difference]: Start difference. First operand has 161 places, 169 transitions, 2319 flow. Second operand 17 states and 2145 transitions. [2023-01-28 11:41:42,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 464 transitions, 6616 flow [2023-01-28 11:41:42,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 464 transitions, 6013 flow, removed 134 selfloop flow, removed 15 redundant places. [2023-01-28 11:41:42,699 INFO L231 Difference]: Finished difference. Result has 168 places, 171 transitions, 2176 flow [2023-01-28 11:41:42,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2176, PETRI_PLACES=168, PETRI_TRANSITIONS=171} [2023-01-28 11:41:42,700 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 135 predicate places. [2023-01-28 11:41:42,700 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 171 transitions, 2176 flow [2023-01-28 11:41:42,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 120.54166666666667) internal successors, (2893), 24 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:42,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:42,700 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:42,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:42,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:42,906 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:42,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:42,906 INFO L85 PathProgramCache]: Analyzing trace with hash 2025698849, now seen corresponding path program 12 times [2023-01-28 11:41:42,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:42,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134829420] [2023-01-28 11:41:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:42,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-28 11:41:43,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:43,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134829420] [2023-01-28 11:41:43,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134829420] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:43,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786763293] [2023-01-28 11:41:43,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:41:43,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:43,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:43,081 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:43,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 11:41:43,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-28 11:41:43,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:43,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 11:41:43,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-28 11:41:43,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:43,745 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-01-28 11:41:43,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786763293] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:43,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:43,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2023-01-28 11:41:43,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460210612] [2023-01-28 11:41:43,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:43,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 11:41:43,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:43,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 11:41:43,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-01-28 11:41:43,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:43,748 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 171 transitions, 2176 flow. Second operand has 25 states, 25 states have (on average 120.36) internal successors, (3009), 25 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:43,748 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:43,748 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:43,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:45,258 INFO L130 PetriNetUnfolder]: 8448/11779 cut-off events. [2023-01-28 11:41:45,258 INFO L131 PetriNetUnfolder]: For 89172/89811 co-relation queries the response was YES. [2023-01-28 11:41:45,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65503 conditions, 11779 events. 8448/11779 cut-off events. For 89172/89811 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 57514 event pairs, 2151 based on Foata normal form. 856/12458 useless extension candidates. Maximal degree in co-relation 65406. Up to 5793 conditions per place. [2023-01-28 11:41:45,438 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 477 selfloop transitions, 20 changer transitions 0/518 dead transitions. [2023-01-28 11:41:45,438 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 518 transitions, 7364 flow [2023-01-28 11:41:45,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 11:41:45,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 11:41:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1739 transitions. [2023-01-28 11:41:45,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787020905923345 [2023-01-28 11:41:45,447 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1739 transitions. [2023-01-28 11:41:45,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1739 transitions. [2023-01-28 11:41:45,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:45,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1739 transitions. [2023-01-28 11:41:45,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 124.21428571428571) internal successors, (1739), 14 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 11:41:45,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 328.0) internal successors, (4920), 15 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:45,463 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 328.0) internal successors, (4920), 15 states have internal predecessors, (4920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:45,463 INFO L175 Difference]: Start difference. First operand has 168 places, 171 transitions, 2176 flow. Second operand 14 states and 1739 transitions. [2023-01-28 11:41:45,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 518 transitions, 7364 flow [2023-01-28 11:41:45,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 518 transitions, 7065 flow, removed 139 selfloop flow, removed 9 redundant places. [2023-01-28 11:41:45,833 INFO L231 Difference]: Finished difference. Result has 163 places, 172 transitions, 2145 flow [2023-01-28 11:41:45,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2089, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2145, PETRI_PLACES=163, PETRI_TRANSITIONS=172} [2023-01-28 11:41:45,833 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 130 predicate places. [2023-01-28 11:41:45,834 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 172 transitions, 2145 flow [2023-01-28 11:41:45,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 120.36) internal successors, (3009), 25 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:45,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:45,834 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:45,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-28 11:41:46,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:46,040 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:46,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash 421770685, now seen corresponding path program 13 times [2023-01-28 11:41:46,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:46,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819682481] [2023-01-28 11:41:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:46,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-28 11:41:46,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:46,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819682481] [2023-01-28 11:41:46,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819682481] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:46,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364591009] [2023-01-28 11:41:46,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 11:41:46,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:46,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:46,211 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:46,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 11:41:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:46,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 11:41:46,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-28 11:41:46,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:46,562 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-01-28 11:41:46,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364591009] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:46,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:46,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2023-01-28 11:41:46,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913883384] [2023-01-28 11:41:46,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:46,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 11:41:46,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:46,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 11:41:46,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2023-01-28 11:41:46,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 328 [2023-01-28 11:41:46,566 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 172 transitions, 2145 flow. Second operand has 25 states, 25 states have (on average 120.6) internal successors, (3015), 25 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:46,566 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:46,566 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 328 [2023-01-28 11:41:46,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:48,233 INFO L130 PetriNetUnfolder]: 8881/12471 cut-off events. [2023-01-28 11:41:48,233 INFO L131 PetriNetUnfolder]: For 81543/81703 co-relation queries the response was YES. [2023-01-28 11:41:48,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71775 conditions, 12471 events. 8881/12471 cut-off events. For 81543/81703 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 58901 event pairs, 891 based on Foata normal form. 210/12680 useless extension candidates. Maximal degree in co-relation 71684. Up to 5977 conditions per place. [2023-01-28 11:41:48,306 INFO L137 encePairwiseOnDemand]: 319/328 looper letters, 201 selfloop transitions, 63 changer transitions 0/271 dead transitions. [2023-01-28 11:41:48,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 271 transitions, 3503 flow [2023-01-28 11:41:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-01-28 11:41:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-01-28 11:41:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1869 transitions. [2023-01-28 11:41:48,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3798780487804878 [2023-01-28 11:41:48,308 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1869 transitions. [2023-01-28 11:41:48,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1869 transitions. [2023-01-28 11:41:48,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:48,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1869 transitions. [2023-01-28 11:41:48,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 124.6) internal successors, (1869), 15 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:48,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 328.0) internal successors, (5248), 16 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:48,312 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 328.0) internal successors, (5248), 16 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:48,312 INFO L175 Difference]: Start difference. First operand has 163 places, 172 transitions, 2145 flow. Second operand 15 states and 1869 transitions. [2023-01-28 11:41:48,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 271 transitions, 3503 flow [2023-01-28 11:41:48,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 271 transitions, 3385 flow, removed 26 selfloop flow, removed 11 redundant places. [2023-01-28 11:41:48,696 INFO L231 Difference]: Finished difference. Result has 168 places, 181 transitions, 2423 flow [2023-01-28 11:41:48,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2423, PETRI_PLACES=168, PETRI_TRANSITIONS=181} [2023-01-28 11:41:48,696 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 135 predicate places. [2023-01-28 11:41:48,696 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 181 transitions, 2423 flow [2023-01-28 11:41:48,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 120.6) internal successors, (3015), 25 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:48,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:48,697 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:48,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 11:41:48,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:48,898 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:48,898 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:48,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1021162570, now seen corresponding path program 14 times [2023-01-28 11:41:48,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:48,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192084022] [2023-01-28 11:41:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:48,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 11:41:49,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:49,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192084022] [2023-01-28 11:41:49,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192084022] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:49,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025145395] [2023-01-28 11:41:49,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:41:49,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:49,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:49,085 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:49,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 11:41:49,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:41:49,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:49,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 12 conjunts are in the unsatisfiable core [2023-01-28 11:41:49,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 11:41:49,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:49,490 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 19 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 11:41:49,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025145395] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:49,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:49,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2023-01-28 11:41:49,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152418383] [2023-01-28 11:41:49,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:49,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 11:41:49,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:49,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 11:41:49,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-01-28 11:41:49,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 328 [2023-01-28 11:41:49,494 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 181 transitions, 2423 flow. Second operand has 19 states, 19 states have (on average 142.94736842105263) internal successors, (2716), 19 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:49,494 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:49,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 328 [2023-01-28 11:41:49,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:52,021 INFO L130 PetriNetUnfolder]: 11936/16724 cut-off events. [2023-01-28 11:41:52,021 INFO L131 PetriNetUnfolder]: For 107878/108036 co-relation queries the response was YES. [2023-01-28 11:41:52,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94725 conditions, 16724 events. 11936/16724 cut-off events. For 107878/108036 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 81503 event pairs, 571 based on Foata normal form. 258/16982 useless extension candidates. Maximal degree in co-relation 94632. Up to 3428 conditions per place. [2023-01-28 11:41:52,128 INFO L137 encePairwiseOnDemand]: 321/328 looper letters, 553 selfloop transitions, 159 changer transitions 85/801 dead transitions. [2023-01-28 11:41:52,128 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 801 transitions, 8120 flow [2023-01-28 11:41:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-01-28 11:41:52,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-01-28 11:41:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 6533 transitions. [2023-01-28 11:41:52,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320192853091324 [2023-01-28 11:41:52,156 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 6533 transitions. [2023-01-28 11:41:52,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 6533 transitions. [2023-01-28 11:41:52,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:52,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 6533 transitions. [2023-01-28 11:41:52,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 151.93023255813952) internal successors, (6533), 43 states have internal predecessors, (6533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:52,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 328.0) internal successors, (14432), 44 states have internal predecessors, (14432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:52,191 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 328.0) internal successors, (14432), 44 states have internal predecessors, (14432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:52,191 INFO L175 Difference]: Start difference. First operand has 168 places, 181 transitions, 2423 flow. Second operand 43 states and 6533 transitions. [2023-01-28 11:41:52,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 801 transitions, 8120 flow [2023-01-28 11:41:52,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 801 transitions, 8012 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-01-28 11:41:52,880 INFO L231 Difference]: Finished difference. Result has 206 places, 233 transitions, 3574 flow [2023-01-28 11:41:52,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=3574, PETRI_PLACES=206, PETRI_TRANSITIONS=233} [2023-01-28 11:41:52,880 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 173 predicate places. [2023-01-28 11:41:52,880 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 233 transitions, 3574 flow [2023-01-28 11:41:52,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.94736842105263) internal successors, (2716), 19 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:52,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:41:52,881 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:41:52,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-01-28 11:41:53,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:53,086 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-01-28 11:41:53,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:41:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1430726769, now seen corresponding path program 15 times [2023-01-28 11:41:53,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:41:53,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024284984] [2023-01-28 11:41:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:41:53,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:41:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:41:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-01-28 11:41:53,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:41:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024284984] [2023-01-28 11:41:53,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024284984] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:41:53,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373134962] [2023-01-28 11:41:53,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:41:53,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:41:53,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:41:53,262 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:41:53,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 11:41:53,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 11:41:53,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:41:53,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 11:41:53,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:41:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 11:41:53,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:41:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 11:41:53,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373134962] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:41:53,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:41:53,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 18 [2023-01-28 11:41:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641930538] [2023-01-28 11:41:53,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:41:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 11:41:53,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:41:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 11:41:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-01-28 11:41:53,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 328 [2023-01-28 11:41:53,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 233 transitions, 3574 flow. Second operand has 18 states, 18 states have (on average 114.88888888888889) internal successors, (2068), 18 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:53,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:41:53,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 328 [2023-01-28 11:41:53,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:41:58,094 INFO L130 PetriNetUnfolder]: 19835/27920 cut-off events. [2023-01-28 11:41:58,095 INFO L131 PetriNetUnfolder]: For 210916/211176 co-relation queries the response was YES. [2023-01-28 11:41:58,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166503 conditions, 27920 events. 19835/27920 cut-off events. For 210916/211176 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 150296 event pairs, 192 based on Foata normal form. 586/28506 useless extension candidates. Maximal degree in co-relation 159348. Up to 5793 conditions per place. [2023-01-28 11:41:58,294 INFO L137 encePairwiseOnDemand]: 314/328 looper letters, 0 selfloop transitions, 0 changer transitions 1270/1270 dead transitions. [2023-01-28 11:41:58,294 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 1270 transitions, 18792 flow [2023-01-28 11:41:58,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-28 11:41:58,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-28 11:41:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 5852 transitions. [2023-01-28 11:41:58,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641114982578397 [2023-01-28 11:41:58,298 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 5852 transitions. [2023-01-28 11:41:58,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 5852 transitions. [2023-01-28 11:41:58,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:41:58,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 5852 transitions. [2023-01-28 11:41:58,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 119.42857142857143) internal successors, (5852), 49 states have internal predecessors, (5852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:58,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 328.0) internal successors, (16400), 50 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:58,312 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 328.0) internal successors, (16400), 50 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:41:58,312 INFO L175 Difference]: Start difference. First operand has 206 places, 233 transitions, 3574 flow. Second operand 49 states and 5852 transitions. [2023-01-28 11:41:58,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 1270 transitions, 18792 flow [2023-01-28 11:42:00,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 1270 transitions, 16260 flow, removed 293 selfloop flow, removed 32 redundant places. [2023-01-28 11:42:00,371 INFO L231 Difference]: Finished difference. Result has 219 places, 0 transitions, 0 flow [2023-01-28 11:42:00,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=328, PETRI_DIFFERENCE_MINUEND_FLOW=2954, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=0, PETRI_PLACES=219, PETRI_TRANSITIONS=0} [2023-01-28 11:42:00,372 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 186 predicate places. [2023-01-28 11:42:00,372 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 0 transitions, 0 flow [2023-01-28 11:42:00,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 114.88888888888889) internal successors, (2068), 18 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:42:00,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 11:42:00,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-28 11:42:00,374 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-28 11:42:00,375 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-28 11:42:00,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-01-28 11:42:00,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:42:00,580 INFO L445 BasicCegarLoop]: Path program histogram: [15, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 11:42:00,582 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 11:42:00,582 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 11:42:00,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 11:42:00 BasicIcfg [2023-01-28 11:42:00,584 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 11:42:00,585 INFO L158 Benchmark]: Toolchain (without parser) took 45106.13ms. Allocated memory was 583.0MB in the beginning and 8.4GB in the end (delta: 7.8GB). Free memory was 533.9MB in the beginning and 6.6GB in the end (delta: -6.1GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2023-01-28 11:42:00,585 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 352.3MB. Free memory is still 299.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 11:42:00,585 INFO L158 Benchmark]: CACSL2BoogieTranslator took 152.85ms. Allocated memory is still 583.0MB. Free memory was 533.6MB in the beginning and 522.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 11:42:00,585 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.90ms. Allocated memory is still 583.0MB. Free memory was 522.1MB in the beginning and 520.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:42:00,585 INFO L158 Benchmark]: Boogie Preprocessor took 18.17ms. Allocated memory is still 583.0MB. Free memory was 520.1MB in the beginning and 518.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 11:42:00,585 INFO L158 Benchmark]: RCFGBuilder took 419.84ms. Allocated memory is still 583.0MB. Free memory was 518.5MB in the beginning and 499.6MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-28 11:42:00,586 INFO L158 Benchmark]: TraceAbstraction took 44488.82ms. Allocated memory was 583.0MB in the beginning and 8.4GB in the end (delta: 7.8GB). Free memory was 498.8MB in the beginning and 6.6GB in the end (delta: -6.1GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2023-01-28 11:42:00,586 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 352.3MB. Free memory is still 299.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 152.85ms. Allocated memory is still 583.0MB. Free memory was 533.6MB in the beginning and 522.1MB in the end (delta: 11.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 22.90ms. Allocated memory is still 583.0MB. Free memory was 522.1MB in the beginning and 520.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.17ms. Allocated memory is still 583.0MB. Free memory was 520.1MB in the beginning and 518.5MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 419.84ms. Allocated memory is still 583.0MB. Free memory was 518.5MB in the beginning and 499.6MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 44488.82ms. Allocated memory was 583.0MB in the beginning and 8.4GB in the end (delta: 7.8GB). Free memory was 498.8MB in the beginning and 6.6GB in the end (delta: -6.1GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.9s, 155 PlacesBefore, 33 PlacesAfterwards, 161 TransitionsBefore, 29 TransitionsAfterwards, 1720 CoEnabledTransitionPairs, 7 FixpointIterations, 84 TrivialSequentialCompositions, 31 ConcurrentSequentialCompositions, 23 TrivialYvCompositions, 6 ConcurrentYvCompositions, 10 ChoiceCompositions, 154 TotalNumberOfCompositions, 2460 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2032, independent: 1969, independent conditional: 0, independent unconditional: 1969, dependent: 63, dependent conditional: 0, dependent unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 921, independent: 904, independent conditional: 0, independent unconditional: 904, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2032, independent: 1065, independent conditional: 0, independent unconditional: 1065, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 921, unknown conditional: 0, unknown unconditional: 921] , Statistics on independence cache: Total cache size (in pairs): 91, Positive cache size: 84, Positive conditional cache size: 0, Positive unconditional cache size: 84, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 103]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 194 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 44.4s, OverallIterations: 22, TraceHistogramMax: 5, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 27.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3647 SdHoareTripleChecker+Valid, 4.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3647 mSDsluCounter, 232 SdHoareTripleChecker+Invalid, 3.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 179 mSDsCounter, 234 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9511 IncrementalHoareTripleChecker+Invalid, 9745 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 234 mSolverCounterUnsat, 53 mSDtfsCounter, 9511 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1682 GetRequests, 1158 SyntacticMatches, 51 SemanticMatches, 473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4039 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3574occurred in iteration=21, InterpolantAutomatonStates: 316, 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: 0.3s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 1406 NumberOfCodeBlocks, 1386 NumberOfCodeBlocksAsserted, 62 NumberOfCheckSat, 2004 ConstructedInterpolants, 0 QuantifiedInterpolants, 5986 SizeOfPredicates, 61 NumberOfNonLiveVariables, 5492 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 58 InterpolantComputations, 8 PerfectInterpolantSequences, 1083/1438 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-01-28 11:42:00,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...