/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 11:12:10,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 11:12:10,329 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 11:12:10,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 11:12:10,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 11:12:10,349 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 11:12:10,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 11:12:10,351 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 11:12:10,352 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 11:12:10,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 11:12:10,353 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 11:12:10,354 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 11:12:10,354 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 11:12:10,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 11:12:10,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 11:12:10,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 11:12:10,356 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 11:12:10,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 11:12:10,358 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 11:12:10,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 11:12:10,360 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 11:12:10,367 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 11:12:10,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 11:12:10,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 11:12:10,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 11:12:10,371 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 11:12:10,371 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 11:12:10,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 11:12:10,372 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 11:12:10,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 11:12:10,372 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 11:12:10,373 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 11:12:10,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 11:12:10,374 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 11:12:10,374 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 11:12:10,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 11:12:10,375 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 11:12:10,375 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 11:12:10,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 11:12:10,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 11:12:10,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 11:12:10,383 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 11:12:10,405 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 11:12:10,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 11:12:10,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 11:12:10,406 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 11:12:10,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 11:12:10,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 11:12:10,406 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 11:12:10,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 11:12:10,407 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 11:12:10,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 11:12:10,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 11:12:10,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 11:12:10,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 11:12:10,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 11:12:10,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 11:12:10,407 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 11:12:10,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 11:12:10,407 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 11:12:10,407 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 11:12:10,407 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 11:12:10,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 11:12:10,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 11:12:10,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 11:12:10,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:12:10,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 11:12:10,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 11:12:10,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 11:12:10,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 11:12:10,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 11:12:10,408 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 11:12:10,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 11:12:10,408 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 11:12:10,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 11:12:10,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 11:12:10,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 11:12:10,637 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 11:12:10,639 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 11:12:10,640 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-01-28 11:12:11,637 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 11:12:11,787 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 11:12:11,787 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c [2023-01-28 11:12:11,793 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d4b76feb/1812a0b620bc4cb89d87dc245cff4bb9/FLAG2a822eed2 [2023-01-28 11:12:11,804 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d4b76feb/1812a0b620bc4cb89d87dc245cff4bb9 [2023-01-28 11:12:11,806 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 11:12:11,807 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 11:12:11,809 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 11:12:11,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 11:12:11,811 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 11:12:11,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:12:11" (1/1) ... [2023-01-28 11:12:11,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14667338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:11, skipping insertion in model container [2023-01-28 11:12:11,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 11:12:11" (1/1) ... [2023-01-28 11:12:11,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 11:12:11,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 11:12:11,989 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2023-01-28 11:12:11,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:12:12,004 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 11:12:12,021 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-3-nl.wvr.c[3615,3628] [2023-01-28 11:12:12,023 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 11:12:12,036 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:12:12,036 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 11:12:12,040 INFO L208 MainTranslator]: Completed translation [2023-01-28 11:12:12,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12 WrapperNode [2023-01-28 11:12:12,041 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 11:12:12,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 11:12:12,041 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 11:12:12,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 11:12:12,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (1/1) ... [2023-01-28 11:12:12,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (1/1) ... [2023-01-28 11:12:12,082 INFO L138 Inliner]: procedures = 26, calls = 55, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 265 [2023-01-28 11:12:12,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 11:12:12,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 11:12:12,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 11:12:12,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 11:12:12,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (1/1) ... [2023-01-28 11:12:12,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (1/1) ... [2023-01-28 11:12:12,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (1/1) ... [2023-01-28 11:12:12,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (1/1) ... [2023-01-28 11:12:12,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (1/1) ... [2023-01-28 11:12:12,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (1/1) ... [2023-01-28 11:12:12,119 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (1/1) ... [2023-01-28 11:12:12,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (1/1) ... [2023-01-28 11:12:12,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 11:12:12,129 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 11:12:12,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 11:12:12,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 11:12:12,130 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (1/1) ... [2023-01-28 11:12:12,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 11:12:12,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:12,150 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 11:12:12,156 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 11:12:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 11:12:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 11:12:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 11:12:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 11:12:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 11:12:12,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 11:12:12,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 11:12:12,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 11:12:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 11:12:12,178 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 11:12:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 11:12:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 11:12:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 11:12:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 11:12:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 11:12:12,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 11:12:12,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 11:12:12,179 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 11:12:12,302 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 11:12:12,303 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 11:12:12,622 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 11:12:12,688 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 11:12:12,688 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-01-28 11:12:12,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:12:12 BoogieIcfgContainer [2023-01-28 11:12:12,690 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 11:12:12,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 11:12:12,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 11:12:12,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 11:12:12,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 11:12:11" (1/3) ... [2023-01-28 11:12:12,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481520a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:12:12, skipping insertion in model container [2023-01-28 11:12:12,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 11:12:12" (2/3) ... [2023-01-28 11:12:12,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@481520a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 11:12:12, skipping insertion in model container [2023-01-28 11:12:12,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 11:12:12" (3/3) ... [2023-01-28 11:12:12,695 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-3-nl.wvr.c [2023-01-28 11:12:12,706 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 11:12:12,706 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 11:12:12,707 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 11:12:12,748 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-01-28 11:12:12,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 214 transitions, 452 flow [2023-01-28 11:12:12,852 INFO L130 PetriNetUnfolder]: 18/211 cut-off events. [2023-01-28 11:12:12,852 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 11:12:12,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 211 events. 18/211 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 128 event pairs, 0 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-01-28 11:12:12,857 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 214 transitions, 452 flow [2023-01-28 11:12:12,864 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 193 places, 201 transitions, 420 flow [2023-01-28 11:12:12,867 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 11:12:12,877 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 193 places, 201 transitions, 420 flow [2023-01-28 11:12:12,879 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 193 places, 201 transitions, 420 flow [2023-01-28 11:12:12,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 193 places, 201 transitions, 420 flow [2023-01-28 11:12:12,917 INFO L130 PetriNetUnfolder]: 18/201 cut-off events. [2023-01-28 11:12:12,917 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 11:12:12,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214 conditions, 201 events. 18/201 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 127 event pairs, 0 based on Foata normal form. 0/183 useless extension candidates. Maximal degree in co-relation 173. Up to 3 conditions per place. [2023-01-28 11:12:12,920 INFO L119 LiptonReduction]: Number of co-enabled transitions 1880 [2023-01-28 11:12:18,877 INFO L134 LiptonReduction]: Checked pairs total: 2630 [2023-01-28 11:12:18,878 INFO L136 LiptonReduction]: Total number of compositions: 208 [2023-01-28 11:12:18,895 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 11:12:18,915 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;@28540fc8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 11:12:18,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-01-28 11:12:18,928 INFO L130 PetriNetUnfolder]: 6/27 cut-off events. [2023-01-28 11:12:18,928 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-28 11:12:18,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:18,929 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 11:12:18,930 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 11:12:18,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:18,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2034446607, now seen corresponding path program 1 times [2023-01-28 11:12:18,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:18,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360787061] [2023-01-28 11:12:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:18,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:19,107 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 11:12:19,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:19,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360787061] [2023-01-28 11:12:19,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360787061] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:12:19,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:12:19,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 11:12:19,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210253972] [2023-01-28 11:12:19,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:12:19,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-01-28 11:12:19,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-01-28 11:12:19,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-01-28 11:12:19,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 422 [2023-01-28 11:12:19,142 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,142 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:19,142 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 422 [2023-01-28 11:12:19,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:19,211 INFO L130 PetriNetUnfolder]: 323/460 cut-off events. [2023-01-28 11:12:19,211 INFO L131 PetriNetUnfolder]: For 39/39 co-relation queries the response was YES. [2023-01-28 11:12:19,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 972 conditions, 460 events. 323/460 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1341 event pairs, 190 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 765. Up to 460 conditions per place. [2023-01-28 11:12:19,214 INFO L137 encePairwiseOnDemand]: 421/422 looper letters, 26 selfloop transitions, 0 changer transitions 0/27 dead transitions. [2023-01-28 11:12:19,215 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 124 flow [2023-01-28 11:12:19,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-01-28 11:12:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-01-28 11:12:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 405 transitions. [2023-01-28 11:12:19,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47985781990521326 [2023-01-28 11:12:19,225 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 405 transitions. [2023-01-28 11:12:19,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 405 transitions. [2023-01-28 11:12:19,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:19,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 405 transitions. [2023-01-28 11:12:19,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 202.5) internal successors, (405), 2 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,238 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 422.0) internal successors, (1266), 3 states have internal predecessors, (1266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,239 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 2 states and 405 transitions. [2023-01-28 11:12:19,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 124 flow [2023-01-28 11:12:19,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 112 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 11:12:19,243 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 60 flow [2023-01-28 11:12:19,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=60, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-01-28 11:12:19,248 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -5 predicate places. [2023-01-28 11:12:19,248 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 60 flow [2023-01-28 11:12:19,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 199.0) internal successors, (398), 2 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:19,249 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 11:12:19,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 11:12:19,249 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 11:12:19,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:19,250 INFO L85 PathProgramCache]: Analyzing trace with hash -192981207, now seen corresponding path program 1 times [2023-01-28 11:12:19,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:19,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558522748] [2023-01-28 11:12:19,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:19,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:19,558 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 11:12:19,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:19,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558522748] [2023-01-28 11:12:19,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558522748] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:12:19,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:12:19,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 11:12:19,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993447638] [2023-01-28 11:12:19,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:12:19,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:12:19,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:19,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:12:19,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:12:19,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 422 [2023-01-28 11:12:19,569 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 60 flow. Second operand has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,569 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:19,569 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 422 [2023-01-28 11:12:19,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:19,679 INFO L130 PetriNetUnfolder]: 354/534 cut-off events. [2023-01-28 11:12:19,679 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2023-01-28 11:12:19,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092 conditions, 534 events. 354/534 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1723 event pairs, 212 based on Foata normal form. 52/442 useless extension candidates. Maximal degree in co-relation 1089. Up to 460 conditions per place. [2023-01-28 11:12:19,683 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 25 selfloop transitions, 2 changer transitions 25/53 dead transitions. [2023-01-28 11:12:19,683 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 53 transitions, 222 flow [2023-01-28 11:12:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 11:12:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 11:12:19,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 878 transitions. [2023-01-28 11:12:19,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4161137440758294 [2023-01-28 11:12:19,688 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 878 transitions. [2023-01-28 11:12:19,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 878 transitions. [2023-01-28 11:12:19,689 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:19,689 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 878 transitions. [2023-01-28 11:12:19,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 175.6) internal successors, (878), 5 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,695 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 422.0) internal successors, (2532), 6 states have internal predecessors, (2532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,695 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 60 flow. Second operand 5 states and 878 transitions. [2023-01-28 11:12:19,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 53 transitions, 222 flow [2023-01-28 11:12:19,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 53 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-28 11:12:19,696 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 86 flow [2023-01-28 11:12:19,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-01-28 11:12:19,697 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 2 predicate places. [2023-01-28 11:12:19,697 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 86 flow [2023-01-28 11:12:19,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.25) internal successors, (677), 4 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:19,698 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 11:12:19,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 11:12:19,698 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 11:12:19,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:19,698 INFO L85 PathProgramCache]: Analyzing trace with hash -122480723, now seen corresponding path program 1 times [2023-01-28 11:12:19,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:19,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953437988] [2023-01-28 11:12:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:19,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:19,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:19,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953437988] [2023-01-28 11:12:19,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953437988] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:12:19,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:12:19,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-28 11:12:19,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831216105] [2023-01-28 11:12:19,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:12:19,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:12:19,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:19,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:12:19,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:12:19,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 422 [2023-01-28 11:12:19,864 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:19,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 422 [2023-01-28 11:12:19,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:19,963 INFO L130 PetriNetUnfolder]: 452/664 cut-off events. [2023-01-28 11:12:19,963 INFO L131 PetriNetUnfolder]: For 443/443 co-relation queries the response was YES. [2023-01-28 11:12:19,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1897 conditions, 664 events. 452/664 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2352 event pairs, 280 based on Foata normal form. 46/539 useless extension candidates. Maximal degree in co-relation 1890. Up to 461 conditions per place. [2023-01-28 11:12:19,966 INFO L137 encePairwiseOnDemand]: 415/422 looper letters, 26 selfloop transitions, 2 changer transitions 14/43 dead transitions. [2023-01-28 11:12:19,966 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 43 transitions, 218 flow [2023-01-28 11:12:19,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:12:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:12:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 701 transitions. [2023-01-28 11:12:19,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4152843601895735 [2023-01-28 11:12:19,968 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 701 transitions. [2023-01-28 11:12:19,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 701 transitions. [2023-01-28 11:12:19,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:19,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 701 transitions. [2023-01-28 11:12:19,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 175.25) internal successors, (701), 4 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,973 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,973 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 86 flow. Second operand 4 states and 701 transitions. [2023-01-28 11:12:19,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 43 transitions, 218 flow [2023-01-28 11:12:19,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 198 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-01-28 11:12:19,976 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 94 flow [2023-01-28 11:12:19,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-01-28 11:12:19,977 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-01-28 11:12:19,979 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 94 flow [2023-01-28 11:12:19,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 169.5) internal successors, (678), 4 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:19,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:19,980 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] [2023-01-28 11:12:19,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 11:12:19,980 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 11:12:19,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:19,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1322683899, now seen corresponding path program 1 times [2023-01-28 11:12:19,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:19,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365247403] [2023-01-28 11:12:19,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:19,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:20,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:12:20,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:20,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365247403] [2023-01-28 11:12:20,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365247403] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:12:20,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:12:20,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 11:12:20,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604033570] [2023-01-28 11:12:20,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:12:20,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 11:12:20,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:20,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 11:12:20,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-01-28 11:12:20,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 422 [2023-01-28 11:12:20,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 94 flow. Second operand has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:20,832 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:20,832 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 422 [2023-01-28 11:12:20,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:21,160 INFO L130 PetriNetUnfolder]: 594/862 cut-off events. [2023-01-28 11:12:21,160 INFO L131 PetriNetUnfolder]: For 150/150 co-relation queries the response was YES. [2023-01-28 11:12:21,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 862 events. 594/862 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2894 event pairs, 13 based on Foata normal form. 1/652 useless extension candidates. Maximal degree in co-relation 2251. Up to 576 conditions per place. [2023-01-28 11:12:21,164 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 71 selfloop transitions, 28 changer transitions 3/102 dead transitions. [2023-01-28 11:12:21,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 102 transitions, 519 flow [2023-01-28 11:12:21,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 11:12:21,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 11:12:21,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1613 transitions. [2023-01-28 11:12:21,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4246972090573986 [2023-01-28 11:12:21,170 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1613 transitions. [2023-01-28 11:12:21,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1613 transitions. [2023-01-28 11:12:21,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:21,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1613 transitions. [2023-01-28 11:12:21,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 179.22222222222223) internal successors, (1613), 9 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,180 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,180 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 94 flow. Second operand 9 states and 1613 transitions. [2023-01-28 11:12:21,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 102 transitions, 519 flow [2023-01-28 11:12:21,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 102 transitions, 515 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-01-28 11:12:21,182 INFO L231 Difference]: Finished difference. Result has 45 places, 55 transitions, 287 flow [2023-01-28 11:12:21,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=287, PETRI_PLACES=45, PETRI_TRANSITIONS=55} [2023-01-28 11:12:21,184 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 13 predicate places. [2023-01-28 11:12:21,184 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 55 transitions, 287 flow [2023-01-28 11:12:21,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:21,185 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] [2023-01-28 11:12:21,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-28 11:12:21,185 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 11:12:21,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:21,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1126960381, now seen corresponding path program 2 times [2023-01-28 11:12:21,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:21,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690074880] [2023-01-28 11:12:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:21,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:12:21,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:21,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690074880] [2023-01-28 11:12:21,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690074880] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:12:21,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:12:21,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 11:12:21,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824666239] [2023-01-28 11:12:21,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:12:21,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 11:12:21,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:21,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 11:12:21,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 11:12:21,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-01-28 11:12:21,313 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 55 transitions, 287 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,313 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:21,313 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-01-28 11:12:21,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:21,416 INFO L130 PetriNetUnfolder]: 485/716 cut-off events. [2023-01-28 11:12:21,416 INFO L131 PetriNetUnfolder]: For 453/466 co-relation queries the response was YES. [2023-01-28 11:12:21,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 716 events. 485/716 cut-off events. For 453/466 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2231 event pairs, 107 based on Foata normal form. 27/569 useless extension candidates. Maximal degree in co-relation 2435. Up to 632 conditions per place. [2023-01-28 11:12:21,421 INFO L137 encePairwiseOnDemand]: 418/422 looper letters, 55 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2023-01-28 11:12:21,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 421 flow [2023-01-28 11:12:21,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 11:12:21,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 11:12:21,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2023-01-28 11:12:21,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4684044233807267 [2023-01-28 11:12:21,422 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2023-01-28 11:12:21,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2023-01-28 11:12:21,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:21,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2023-01-28 11:12:21,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,427 INFO L175 Difference]: Start difference. First operand has 45 places, 55 transitions, 287 flow. Second operand 3 states and 593 transitions. [2023-01-28 11:12:21,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 421 flow [2023-01-28 11:12:21,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 363 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-01-28 11:12:21,432 INFO L231 Difference]: Finished difference. Result has 46 places, 53 transitions, 238 flow [2023-01-28 11:12:21,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=46, PETRI_TRANSITIONS=53} [2023-01-28 11:12:21,434 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-01-28 11:12:21,434 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 53 transitions, 238 flow [2023-01-28 11:12:21,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:21,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:21,435 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] [2023-01-28 11:12:21,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-28 11:12:21,435 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 11:12:21,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:21,435 INFO L85 PathProgramCache]: Analyzing trace with hash 247356795, now seen corresponding path program 3 times [2023-01-28 11:12:21,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:21,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838405707] [2023-01-28 11:12:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:21,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:22,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:12:22,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:22,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838405707] [2023-01-28 11:12:22,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838405707] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:12:22,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:12:22,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 11:12:22,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100425045] [2023-01-28 11:12:22,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:12:22,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 11:12:22,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:22,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 11:12:22,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-01-28 11:12:22,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 422 [2023-01-28 11:12:22,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 53 transitions, 238 flow. Second operand has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:22,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:22,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 422 [2023-01-28 11:12:22,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:22,300 INFO L130 PetriNetUnfolder]: 604/893 cut-off events. [2023-01-28 11:12:22,300 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2023-01-28 11:12:22,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2910 conditions, 893 events. 604/893 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2922 event pairs, 123 based on Foata normal form. 1/692 useless extension candidates. Maximal degree in co-relation 2897. Up to 754 conditions per place. [2023-01-28 11:12:22,305 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 70 selfloop transitions, 26 changer transitions 3/99 dead transitions. [2023-01-28 11:12:22,305 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 99 transitions, 606 flow [2023-01-28 11:12:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 11:12:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 11:12:22,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1591 transitions. [2023-01-28 11:12:22,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41890468667719855 [2023-01-28 11:12:22,309 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1591 transitions. [2023-01-28 11:12:22,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1591 transitions. [2023-01-28 11:12:22,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:22,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1591 transitions. [2023-01-28 11:12:22,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.77777777777777) internal successors, (1591), 9 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:22,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:22,316 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:22,316 INFO L175 Difference]: Start difference. First operand has 46 places, 53 transitions, 238 flow. Second operand 9 states and 1591 transitions. [2023-01-28 11:12:22,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 99 transitions, 606 flow [2023-01-28 11:12:22,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 99 transitions, 577 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-28 11:12:22,320 INFO L231 Difference]: Finished difference. Result has 57 places, 71 transitions, 413 flow [2023-01-28 11:12:22,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=413, PETRI_PLACES=57, PETRI_TRANSITIONS=71} [2023-01-28 11:12:22,322 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 25 predicate places. [2023-01-28 11:12:22,322 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 71 transitions, 413 flow [2023-01-28 11:12:22,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:22,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:22,323 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] [2023-01-28 11:12:22,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-28 11:12:22,323 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 11:12:22,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash 740987369, now seen corresponding path program 4 times [2023-01-28 11:12:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:22,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458275694] [2023-01-28 11:12:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:22,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:12:22,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:22,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458275694] [2023-01-28 11:12:22,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458275694] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:12:22,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:12:22,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 11:12:22,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316082707] [2023-01-28 11:12:22,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:12:22,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 11:12:22,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 11:12:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 11:12:22,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 422 [2023-01-28 11:12:22,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 71 transitions, 413 flow. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:22,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:22,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 422 [2023-01-28 11:12:22,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:22,519 INFO L130 PetriNetUnfolder]: 532/822 cut-off events. [2023-01-28 11:12:22,519 INFO L131 PetriNetUnfolder]: For 759/768 co-relation queries the response was YES. [2023-01-28 11:12:22,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2790 conditions, 822 events. 532/822 cut-off events. For 759/768 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2946 event pairs, 156 based on Foata normal form. 63/725 useless extension candidates. Maximal degree in co-relation 2773. Up to 541 conditions per place. [2023-01-28 11:12:22,524 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 60 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2023-01-28 11:12:22,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 501 flow [2023-01-28 11:12:22,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 11:12:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 11:12:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2023-01-28 11:12:22,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46208530805687204 [2023-01-28 11:12:22,526 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2023-01-28 11:12:22,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2023-01-28 11:12:22,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:22,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2023-01-28 11:12:22,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:22,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:22,529 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 422.0) internal successors, (1688), 4 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:22,529 INFO L175 Difference]: Start difference. First operand has 57 places, 71 transitions, 413 flow. Second operand 3 states and 585 transitions. [2023-01-28 11:12:22,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 501 flow [2023-01-28 11:12:22,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 69 transitions, 459 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-01-28 11:12:22,533 INFO L231 Difference]: Finished difference. Result has 54 places, 60 transitions, 324 flow [2023-01-28 11:12:22,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=54, PETRI_TRANSITIONS=60} [2023-01-28 11:12:22,533 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 22 predicate places. [2023-01-28 11:12:22,533 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 60 transitions, 324 flow [2023-01-28 11:12:22,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:22,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:22,534 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] [2023-01-28 11:12:22,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-28 11:12:22,534 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 11:12:22,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:22,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1391984997, now seen corresponding path program 5 times [2023-01-28 11:12:22,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:22,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015427252] [2023-01-28 11:12:22,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:22,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:12:23,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:23,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015427252] [2023-01-28 11:12:23,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015427252] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:12:23,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:12:23,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 11:12:23,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829366730] [2023-01-28 11:12:23,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:12:23,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 11:12:23,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:23,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 11:12:23,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-01-28 11:12:23,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 422 [2023-01-28 11:12:23,146 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 60 transitions, 324 flow. Second operand has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:23,146 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:23,146 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 422 [2023-01-28 11:12:23,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:23,429 INFO L130 PetriNetUnfolder]: 607/947 cut-off events. [2023-01-28 11:12:23,429 INFO L131 PetriNetUnfolder]: For 773/773 co-relation queries the response was YES. [2023-01-28 11:12:23,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3310 conditions, 947 events. 607/947 cut-off events. For 773/773 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3552 event pairs, 113 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 3294. Up to 719 conditions per place. [2023-01-28 11:12:23,435 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 83 selfloop transitions, 23 changer transitions 3/109 dead transitions. [2023-01-28 11:12:23,435 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 109 transitions, 717 flow [2023-01-28 11:12:23,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 11:12:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 11:12:23,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1594 transitions. [2023-01-28 11:12:23,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41969457609268035 [2023-01-28 11:12:23,439 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1594 transitions. [2023-01-28 11:12:23,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1594 transitions. [2023-01-28 11:12:23,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:23,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1594 transitions. [2023-01-28 11:12:23,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 177.11111111111111) internal successors, (1594), 9 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:23,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:23,446 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:23,446 INFO L175 Difference]: Start difference. First operand has 54 places, 60 transitions, 324 flow. Second operand 9 states and 1594 transitions. [2023-01-28 11:12:23,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 109 transitions, 717 flow [2023-01-28 11:12:23,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 704 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-01-28 11:12:23,451 INFO L231 Difference]: Finished difference. Result has 64 places, 69 transitions, 460 flow [2023-01-28 11:12:23,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=460, PETRI_PLACES=64, PETRI_TRANSITIONS=69} [2023-01-28 11:12:23,452 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 32 predicate places. [2023-01-28 11:12:23,452 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 69 transitions, 460 flow [2023-01-28 11:12:23,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:23,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:23,454 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] [2023-01-28 11:12:23,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-28 11:12:23,454 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 11:12:23,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:23,455 INFO L85 PathProgramCache]: Analyzing trace with hash 948876929, now seen corresponding path program 6 times [2023-01-28 11:12:23,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:23,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321395946] [2023-01-28 11:12:23,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:23,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:23,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:12:24,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:24,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321395946] [2023-01-28 11:12:24,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321395946] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:12:24,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:12:24,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-01-28 11:12:24,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208618427] [2023-01-28 11:12:24,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:12:24,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 11:12:24,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:24,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 11:12:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-01-28 11:12:24,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 422 [2023-01-28 11:12:24,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 69 transitions, 460 flow. Second operand has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:24,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:24,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 422 [2023-01-28 11:12:24,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:24,265 INFO L130 PetriNetUnfolder]: 616/971 cut-off events. [2023-01-28 11:12:24,265 INFO L131 PetriNetUnfolder]: For 1279/1279 co-relation queries the response was YES. [2023-01-28 11:12:24,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3656 conditions, 971 events. 616/971 cut-off events. For 1279/1279 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3710 event pairs, 163 based on Foata normal form. 1/800 useless extension candidates. Maximal degree in co-relation 3637. Up to 832 conditions per place. [2023-01-28 11:12:24,271 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 86 selfloop transitions, 19 changer transitions 3/108 dead transitions. [2023-01-28 11:12:24,271 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 108 transitions, 824 flow [2023-01-28 11:12:24,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-01-28 11:12:24,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-01-28 11:12:24,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1586 transitions. [2023-01-28 11:12:24,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41758820431806215 [2023-01-28 11:12:24,274 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1586 transitions. [2023-01-28 11:12:24,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1586 transitions. [2023-01-28 11:12:24,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:24,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1586 transitions. [2023-01-28 11:12:24,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 176.22222222222223) internal successors, (1586), 9 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:24,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:24,281 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 422.0) internal successors, (4220), 10 states have internal predecessors, (4220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:24,281 INFO L175 Difference]: Start difference. First operand has 64 places, 69 transitions, 460 flow. Second operand 9 states and 1586 transitions. [2023-01-28 11:12:24,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 108 transitions, 824 flow [2023-01-28 11:12:24,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 755 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-01-28 11:12:24,289 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 532 flow [2023-01-28 11:12:24,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=532, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2023-01-28 11:12:24,290 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 39 predicate places. [2023-01-28 11:12:24,290 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 532 flow [2023-01-28 11:12:24,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 170.66666666666666) internal successors, (1536), 9 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:24,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:24,290 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 11:12:24,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-01-28 11:12:24,291 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 11:12:24,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:24,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1017322832, now seen corresponding path program 1 times [2023-01-28 11:12:24,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:24,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567557121] [2023-01-28 11:12:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:24,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:24,382 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 11:12:24,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:24,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567557121] [2023-01-28 11:12:24,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567557121] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:12:24,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 11:12:24,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 11:12:24,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709264278] [2023-01-28 11:12:24,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:12:24,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:12:24,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:12:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 11:12:24,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-01-28 11:12:24,385 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 532 flow. Second operand has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:24,385 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:24,385 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-01-28 11:12:24,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:24,527 INFO L130 PetriNetUnfolder]: 804/1266 cut-off events. [2023-01-28 11:12:24,527 INFO L131 PetriNetUnfolder]: For 2099/2107 co-relation queries the response was YES. [2023-01-28 11:12:24,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4864 conditions, 1266 events. 804/1266 cut-off events. For 2099/2107 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5315 event pairs, 219 based on Foata normal form. 20/1038 useless extension candidates. Maximal degree in co-relation 4841. Up to 576 conditions per place. [2023-01-28 11:12:24,535 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 63 selfloop transitions, 39 changer transitions 4/108 dead transitions. [2023-01-28 11:12:24,535 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 108 transitions, 904 flow [2023-01-28 11:12:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:12:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:12:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 800 transitions. [2023-01-28 11:12:24,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47393364928909953 [2023-01-28 11:12:24,585 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 800 transitions. [2023-01-28 11:12:24,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 800 transitions. [2023-01-28 11:12:24,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:24,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 800 transitions. [2023-01-28 11:12:24,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:24,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:24,589 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:24,589 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 532 flow. Second operand 4 states and 800 transitions. [2023-01-28 11:12:24,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 108 transitions, 904 flow [2023-01-28 11:12:24,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 108 transitions, 842 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-01-28 11:12:24,603 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 640 flow [2023-01-28 11:12:24,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=640, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2023-01-28 11:12:24,604 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 40 predicate places. [2023-01-28 11:12:24,604 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 640 flow [2023-01-28 11:12:24,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.0) internal successors, (764), 4 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:24,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:24,604 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 11:12:24,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-01-28 11:12:24,604 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 11:12:24,605 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:24,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1082305135, now seen corresponding path program 1 times [2023-01-28 11:12:24,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:24,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571439641] [2023-01-28 11:12:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:24,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:24,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:24,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:24,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571439641] [2023-01-28 11:12:24,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571439641] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:24,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189463017] [2023-01-28 11:12:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:24,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:24,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:24,699 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 11:12:24,732 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 11:12:24,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:24,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:12:24,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:24,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:24,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189463017] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:24,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:24,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 11:12:24,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616356262] [2023-01-28 11:12:24,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:24,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 11:12:24,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:24,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 11:12:24,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 11:12:24,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 422 [2023-01-28 11:12:24,945 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 640 flow. Second operand has 12 states, 12 states have (on average 165.16666666666666) internal successors, (1982), 12 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:24,945 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:24,945 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 422 [2023-01-28 11:12:24,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:25,226 INFO L130 PetriNetUnfolder]: 1246/1997 cut-off events. [2023-01-28 11:12:25,226 INFO L131 PetriNetUnfolder]: For 4938/4954 co-relation queries the response was YES. [2023-01-28 11:12:25,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8843 conditions, 1997 events. 1246/1997 cut-off events. For 4938/4954 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9188 event pairs, 582 based on Foata normal form. 80/1713 useless extension candidates. Maximal degree in co-relation 8818. Up to 1138 conditions per place. [2023-01-28 11:12:25,238 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 142 selfloop transitions, 7 changer transitions 5/156 dead transitions. [2023-01-28 11:12:25,238 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 156 transitions, 1568 flow [2023-01-28 11:12:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:12:25,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:12:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1033 transitions. [2023-01-28 11:12:25,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079778830963665 [2023-01-28 11:12:25,241 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1033 transitions. [2023-01-28 11:12:25,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1033 transitions. [2023-01-28 11:12:25,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:25,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1033 transitions. [2023-01-28 11:12:25,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.16666666666666) internal successors, (1033), 6 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:25,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:25,255 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:25,255 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 640 flow. Second operand 6 states and 1033 transitions. [2023-01-28 11:12:25,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 156 transitions, 1568 flow [2023-01-28 11:12:25,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 156 transitions, 1530 flow, removed 16 selfloop flow, removed 1 redundant places. [2023-01-28 11:12:25,274 INFO L231 Difference]: Finished difference. Result has 79 places, 83 transitions, 704 flow [2023-01-28 11:12:25,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=704, PETRI_PLACES=79, PETRI_TRANSITIONS=83} [2023-01-28 11:12:25,274 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 47 predicate places. [2023-01-28 11:12:25,274 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 83 transitions, 704 flow [2023-01-28 11:12:25,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 165.16666666666666) internal successors, (1982), 12 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:25,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:25,275 INFO L208 CegarLoopForPetriNet]: trace histogram [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 11:12:25,283 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 11:12:25,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 11:12:25,481 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 11:12:25,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:25,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1111418417, now seen corresponding path program 1 times [2023-01-28 11:12:25,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:25,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532652867] [2023-01-28 11:12:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:25,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:25,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:25,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532652867] [2023-01-28 11:12:25,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532652867] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:25,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985913453] [2023-01-28 11:12:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:25,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:25,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:25,581 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 11:12:25,583 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 11:12:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:25,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:12:25,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:25,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:25,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985913453] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:25,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:25,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-01-28 11:12:25,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144679875] [2023-01-28 11:12:25,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:25,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 11:12:25,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 11:12:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 11:12:25,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 422 [2023-01-28 11:12:25,784 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 83 transitions, 704 flow. Second operand has 12 states, 12 states have (on average 165.25) internal successors, (1983), 12 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:25,784 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:25,784 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 422 [2023-01-28 11:12:25,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:26,219 INFO L130 PetriNetUnfolder]: 1736/2875 cut-off events. [2023-01-28 11:12:26,220 INFO L131 PetriNetUnfolder]: For 7604/7636 co-relation queries the response was YES. [2023-01-28 11:12:26,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12104 conditions, 2875 events. 1736/2875 cut-off events. For 7604/7636 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15170 event pairs, 907 based on Foata normal form. 108/2571 useless extension candidates. Maximal degree in co-relation 12076. Up to 1792 conditions per place. [2023-01-28 11:12:26,236 INFO L137 encePairwiseOnDemand]: 417/422 looper letters, 109 selfloop transitions, 6 changer transitions 23/140 dead transitions. [2023-01-28 11:12:26,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 140 transitions, 1384 flow [2023-01-28 11:12:26,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 11:12:26,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 11:12:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1033 transitions. [2023-01-28 11:12:26,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4079778830963665 [2023-01-28 11:12:26,239 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1033 transitions. [2023-01-28 11:12:26,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1033 transitions. [2023-01-28 11:12:26,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:26,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1033 transitions. [2023-01-28 11:12:26,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 172.16666666666666) internal successors, (1033), 6 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:26,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:26,243 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 422.0) internal successors, (2954), 7 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:26,243 INFO L175 Difference]: Start difference. First operand has 79 places, 83 transitions, 704 flow. Second operand 6 states and 1033 transitions. [2023-01-28 11:12:26,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 140 transitions, 1384 flow [2023-01-28 11:12:26,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 140 transitions, 1332 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-01-28 11:12:26,276 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 761 flow [2023-01-28 11:12:26,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=761, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2023-01-28 11:12:26,277 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 52 predicate places. [2023-01-28 11:12:26,277 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 761 flow [2023-01-28 11:12:26,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 165.25) internal successors, (1983), 12 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:26,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:26,277 INFO L208 CegarLoopForPetriNet]: trace histogram [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 11:12:26,289 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 11:12:26,483 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,SelfDestructingSolverStorable11 [2023-01-28 11:12:26,483 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 11:12:26,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash 719392531, now seen corresponding path program 2 times [2023-01-28 11:12:26,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:26,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571395069] [2023-01-28 11:12:26,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:26,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:27,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:27,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571395069] [2023-01-28 11:12:27,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571395069] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:27,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990216572] [2023-01-28 11:12:27,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:12:27,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:27,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:27,077 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 11:12:27,078 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 11:12:27,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:12:27,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:27,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 11:12:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:27,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:12:27,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:12:27,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:12:27,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:12:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:27,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:27,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:27,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 151 [2023-01-28 11:12:27,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-01-28 11:12:27,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-01-28 11:12:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:27,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990216572] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:27,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:27,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-01-28 11:12:27,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227119108] [2023-01-28 11:12:27,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:27,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 11:12:27,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 11:12:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=584, Unknown=2, NotChecked=0, Total=702 [2023-01-28 11:12:27,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 422 [2023-01-28 11:12:27,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 761 flow. Second operand has 27 states, 27 states have (on average 137.25925925925927) internal successors, (3706), 27 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:27,884 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:27,884 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 422 [2023-01-28 11:12:27,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:30,090 INFO L130 PetriNetUnfolder]: 4258/6745 cut-off events. [2023-01-28 11:12:30,091 INFO L131 PetriNetUnfolder]: For 15540/15612 co-relation queries the response was YES. [2023-01-28 11:12:30,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26021 conditions, 6745 events. 4258/6745 cut-off events. For 15540/15612 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 38977 event pairs, 573 based on Foata normal form. 73/5618 useless extension candidates. Maximal degree in co-relation 25991. Up to 2241 conditions per place. [2023-01-28 11:12:30,124 INFO L137 encePairwiseOnDemand]: 410/422 looper letters, 348 selfloop transitions, 118 changer transitions 2/470 dead transitions. [2023-01-28 11:12:30,124 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 470 transitions, 4003 flow [2023-01-28 11:12:30,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-01-28 11:12:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-01-28 11:12:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 4773 transitions. [2023-01-28 11:12:30,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34274019819043516 [2023-01-28 11:12:30,134 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 4773 transitions. [2023-01-28 11:12:30,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 4773 transitions. [2023-01-28 11:12:30,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:30,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 4773 transitions. [2023-01-28 11:12:30,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 144.63636363636363) internal successors, (4773), 33 states have internal predecessors, (4773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:30,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 422.0) internal successors, (14348), 34 states have internal predecessors, (14348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:30,155 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 422.0) internal successors, (14348), 34 states have internal predecessors, (14348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:30,155 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 761 flow. Second operand 33 states and 4773 transitions. [2023-01-28 11:12:30,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 470 transitions, 4003 flow [2023-01-28 11:12:30,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 470 transitions, 3850 flow, removed 66 selfloop flow, removed 3 redundant places. [2023-01-28 11:12:30,239 INFO L231 Difference]: Finished difference. Result has 134 places, 184 transitions, 1929 flow [2023-01-28 11:12:30,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=1929, PETRI_PLACES=134, PETRI_TRANSITIONS=184} [2023-01-28 11:12:30,239 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 102 predicate places. [2023-01-28 11:12:30,240 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 184 transitions, 1929 flow [2023-01-28 11:12:30,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 137.25925925925927) internal successors, (3706), 27 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:30,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:30,240 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:12:30,250 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 11:12:30,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:30,450 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 11:12:30,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:30,451 INFO L85 PathProgramCache]: Analyzing trace with hash 568558749, now seen corresponding path program 3 times [2023-01-28 11:12:30,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:30,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954232966] [2023-01-28 11:12:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:30,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:12:31,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:31,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954232966] [2023-01-28 11:12:31,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954232966] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:31,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557676981] [2023-01-28 11:12:31,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:12:31,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:31,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:31,114 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 11:12:31,138 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 11:12:31,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:12:31,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:31,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 15 conjunts are in the unsatisfiable core [2023-01-28 11:12:31,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:12:31,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:12:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 11:12:31,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:31,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:31,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 37 [2023-01-28 11:12:31,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-28 11:12:31,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 11:12:31,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557676981] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:31,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:31,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 19 [2023-01-28 11:12:31,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544177127] [2023-01-28 11:12:31,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:31,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 11:12:31,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:31,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 11:12:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=317, Unknown=6, NotChecked=0, Total=380 [2023-01-28 11:12:31,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 422 [2023-01-28 11:12:31,502 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 184 transitions, 1929 flow. Second operand has 20 states, 20 states have (on average 140.7) internal successors, (2814), 20 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:31,502 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:31,502 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 422 [2023-01-28 11:12:31,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:33,154 INFO L130 PetriNetUnfolder]: 5889/9216 cut-off events. [2023-01-28 11:12:33,155 INFO L131 PetriNetUnfolder]: For 63137/63221 co-relation queries the response was YES. [2023-01-28 11:12:33,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50775 conditions, 9216 events. 5889/9216 cut-off events. For 63137/63221 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 55287 event pairs, 1344 based on Foata normal form. 32/8130 useless extension candidates. Maximal degree in co-relation 50726. Up to 4331 conditions per place. [2023-01-28 11:12:33,202 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 185 selfloop transitions, 118 changer transitions 0/305 dead transitions. [2023-01-28 11:12:33,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 305 transitions, 3537 flow [2023-01-28 11:12:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-01-28 11:12:33,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-01-28 11:12:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1896 transitions. [2023-01-28 11:12:33,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3456069996354357 [2023-01-28 11:12:33,206 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1896 transitions. [2023-01-28 11:12:33,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1896 transitions. [2023-01-28 11:12:33,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:33,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1896 transitions. [2023-01-28 11:12:33,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 145.84615384615384) internal successors, (1896), 13 states have internal predecessors, (1896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:33,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:33,213 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 422.0) internal successors, (5908), 14 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:33,213 INFO L175 Difference]: Start difference. First operand has 134 places, 184 transitions, 1929 flow. Second operand 13 states and 1896 transitions. [2023-01-28 11:12:33,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 305 transitions, 3537 flow [2023-01-28 11:12:33,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 305 transitions, 3281 flow, removed 116 selfloop flow, removed 6 redundant places. [2023-01-28 11:12:33,576 INFO L231 Difference]: Finished difference. Result has 144 places, 212 transitions, 2360 flow [2023-01-28 11:12:33,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1741, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2360, PETRI_PLACES=144, PETRI_TRANSITIONS=212} [2023-01-28 11:12:33,577 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 112 predicate places. [2023-01-28 11:12:33,577 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 212 transitions, 2360 flow [2023-01-28 11:12:33,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 140.7) internal successors, (2814), 20 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:33,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:33,577 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:12:33,583 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 11:12:33,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:33,778 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 11:12:33,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:33,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1793127063, now seen corresponding path program 4 times [2023-01-28 11:12:33,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:33,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088479498] [2023-01-28 11:12:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:33,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:33,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:12:34,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:34,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088479498] [2023-01-28 11:12:34,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088479498] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:34,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757727482] [2023-01-28 11:12:34,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:12:34,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:34,765 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 11:12:34,800 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 11:12:34,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:12:34,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:34,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 11:12:34,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:35,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:12:35,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:12:35,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:12:35,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:12:35,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 11:12:35,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:35,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:35,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 151 [2023-01-28 11:12:35,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 58 [2023-01-28 11:12:35,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2023-01-28 11:12:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 11:12:35,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757727482] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:35,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:35,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 24 [2023-01-28 11:12:35,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551900327] [2023-01-28 11:12:35,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:35,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 11:12:35,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 11:12:35,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=512, Unknown=6, NotChecked=0, Total=600 [2023-01-28 11:12:35,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 422 [2023-01-28 11:12:35,330 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 212 transitions, 2360 flow. Second operand has 25 states, 25 states have (on average 137.28) internal successors, (3432), 25 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:35,330 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:35,330 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 422 [2023-01-28 11:12:35,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:37,136 INFO L130 PetriNetUnfolder]: 5860/9167 cut-off events. [2023-01-28 11:12:37,136 INFO L131 PetriNetUnfolder]: For 73491/73577 co-relation queries the response was YES. [2023-01-28 11:12:37,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51575 conditions, 9167 events. 5860/9167 cut-off events. For 73491/73577 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 54783 event pairs, 1476 based on Foata normal form. 32/8243 useless extension candidates. Maximal degree in co-relation 51525. Up to 3015 conditions per place. [2023-01-28 11:12:37,190 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 149 selfloop transitions, 121 changer transitions 23/295 dead transitions. [2023-01-28 11:12:37,190 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 295 transitions, 3651 flow [2023-01-28 11:12:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-01-28 11:12:37,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-01-28 11:12:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1993 transitions. [2023-01-28 11:12:37,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3373392010832769 [2023-01-28 11:12:37,195 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1993 transitions. [2023-01-28 11:12:37,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1993 transitions. [2023-01-28 11:12:37,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:37,195 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1993 transitions. [2023-01-28 11:12:37,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 142.35714285714286) internal successors, (1993), 14 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:37,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 422.0) internal successors, (6330), 15 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:37,205 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 422.0) internal successors, (6330), 15 states have internal predecessors, (6330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:37,205 INFO L175 Difference]: Start difference. First operand has 144 places, 212 transitions, 2360 flow. Second operand 14 states and 1993 transitions. [2023-01-28 11:12:37,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 295 transitions, 3651 flow [2023-01-28 11:12:37,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 295 transitions, 3591 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-01-28 11:12:37,494 INFO L231 Difference]: Finished difference. Result has 153 places, 214 transitions, 2570 flow [2023-01-28 11:12:37,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2570, PETRI_PLACES=153, PETRI_TRANSITIONS=214} [2023-01-28 11:12:37,495 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 121 predicate places. [2023-01-28 11:12:37,495 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 214 transitions, 2570 flow [2023-01-28 11:12:37,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 137.28) internal successors, (3432), 25 states have internal predecessors, (3432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:37,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:37,496 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] [2023-01-28 11:12:37,501 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-01-28 11:12:37,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 11:12:37,701 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 11:12:37,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:37,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2109499593, now seen corresponding path program 2 times [2023-01-28 11:12:37,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:37,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658979956] [2023-01-28 11:12:37,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:37,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:37,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:12:37,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:37,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658979956] [2023-01-28 11:12:37,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658979956] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:37,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706267563] [2023-01-28 11:12:37,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:12:37,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:37,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:37,803 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:12:37,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 11:12:37,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:12:37,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:37,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 11:12:37,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:37,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:12:37,959 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 11:12:37,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706267563] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 11:12:37,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 11:12:37,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-01-28 11:12:37,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20216209] [2023-01-28 11:12:37,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 11:12:37,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 11:12:37,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:37,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 11:12:37,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-01-28 11:12:37,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 422 [2023-01-28 11:12:37,962 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 214 transitions, 2570 flow. Second operand has 4 states, 4 states have (on average 191.25) internal successors, (765), 4 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:37,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:37,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 422 [2023-01-28 11:12:37,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:39,250 INFO L130 PetriNetUnfolder]: 5088/7886 cut-off events. [2023-01-28 11:12:39,250 INFO L131 PetriNetUnfolder]: For 70963/71023 co-relation queries the response was YES. [2023-01-28 11:12:39,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48768 conditions, 7886 events. 5088/7886 cut-off events. For 70963/71023 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 44565 event pairs, 934 based on Foata normal form. 208/7024 useless extension candidates. Maximal degree in co-relation 48716. Up to 5259 conditions per place. [2023-01-28 11:12:39,323 INFO L137 encePairwiseOnDemand]: 418/422 looper letters, 171 selfloop transitions, 45 changer transitions 45/263 dead transitions. [2023-01-28 11:12:39,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 263 transitions, 3461 flow [2023-01-28 11:12:39,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 11:12:39,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 11:12:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 806 transitions. [2023-01-28 11:12:39,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4774881516587678 [2023-01-28 11:12:39,325 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 806 transitions. [2023-01-28 11:12:39,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 806 transitions. [2023-01-28 11:12:39,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:39,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 806 transitions. [2023-01-28 11:12:39,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 201.5) internal successors, (806), 4 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:39,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:39,328 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 422.0) internal successors, (2110), 5 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:39,328 INFO L175 Difference]: Start difference. First operand has 153 places, 214 transitions, 2570 flow. Second operand 4 states and 806 transitions. [2023-01-28 11:12:39,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 263 transitions, 3461 flow [2023-01-28 11:12:39,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 263 transitions, 3299 flow, removed 48 selfloop flow, removed 14 redundant places. [2023-01-28 11:12:39,552 INFO L231 Difference]: Finished difference. Result has 143 places, 164 transitions, 1885 flow [2023-01-28 11:12:39,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=2046, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1885, PETRI_PLACES=143, PETRI_TRANSITIONS=164} [2023-01-28 11:12:39,553 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 111 predicate places. [2023-01-28 11:12:39,553 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 164 transitions, 1885 flow [2023-01-28 11:12:39,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 191.25) internal successors, (765), 4 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:39,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:39,553 INFO L208 CegarLoopForPetriNet]: trace histogram [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 11:12:39,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 11:12:39,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 11:12:39,759 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 11:12:39,759 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:39,759 INFO L85 PathProgramCache]: Analyzing trace with hash -977138711, now seen corresponding path program 1 times [2023-01-28 11:12:39,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:39,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491887629] [2023-01-28 11:12:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:39,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:12:40,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491887629] [2023-01-28 11:12:40,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491887629] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:40,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990044607] [2023-01-28 11:12:40,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:40,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:40,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:40,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:12:40,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 11:12:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:40,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 11:12:40,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:12:40,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:40,594 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 11:12:40,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-01-28 11:12:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:12:40,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990044607] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:40,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:40,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2023-01-28 11:12:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769592957] [2023-01-28 11:12:40,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:40,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 11:12:40,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:40,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 11:12:40,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2023-01-28 11:12:40,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 422 [2023-01-28 11:12:40,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 164 transitions, 1885 flow. Second operand has 26 states, 26 states have (on average 139.84615384615384) internal successors, (3636), 26 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:40,801 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:40,801 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 422 [2023-01-28 11:12:40,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:44,614 INFO L130 PetriNetUnfolder]: 15684/23669 cut-off events. [2023-01-28 11:12:44,614 INFO L131 PetriNetUnfolder]: For 234969/234969 co-relation queries the response was YES. [2023-01-28 11:12:44,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154059 conditions, 23669 events. 15684/23669 cut-off events. For 234969/234969 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 153668 event pairs, 2397 based on Foata normal form. 0/20682 useless extension candidates. Maximal degree in co-relation 154011. Up to 6667 conditions per place. [2023-01-28 11:12:44,921 INFO L137 encePairwiseOnDemand]: 411/422 looper letters, 593 selfloop transitions, 171 changer transitions 0/764 dead transitions. [2023-01-28 11:12:44,921 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 764 transitions, 10722 flow [2023-01-28 11:12:44,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 11:12:44,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 11:12:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3094 transitions. [2023-01-28 11:12:44,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34913112164297 [2023-01-28 11:12:44,924 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3094 transitions. [2023-01-28 11:12:44,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3094 transitions. [2023-01-28 11:12:44,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:44,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3094 transitions. [2023-01-28 11:12:44,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 147.33333333333334) internal successors, (3094), 21 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:44,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 422.0) internal successors, (9284), 22 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:44,935 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 422.0) internal successors, (9284), 22 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:44,935 INFO L175 Difference]: Start difference. First operand has 143 places, 164 transitions, 1885 flow. Second operand 21 states and 3094 transitions. [2023-01-28 11:12:44,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 764 transitions, 10722 flow [2023-01-28 11:12:45,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 764 transitions, 9658 flow, removed 497 selfloop flow, removed 6 redundant places. [2023-01-28 11:12:45,994 INFO L231 Difference]: Finished difference. Result has 153 places, 347 transitions, 4838 flow [2023-01-28 11:12:45,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4838, PETRI_PLACES=153, PETRI_TRANSITIONS=347} [2023-01-28 11:12:45,995 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 121 predicate places. [2023-01-28 11:12:45,995 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 347 transitions, 4838 flow [2023-01-28 11:12:45,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 139.84615384615384) internal successors, (3636), 26 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:45,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:45,996 INFO L208 CegarLoopForPetriNet]: trace histogram [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 11:12:46,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 11:12:46,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:46,201 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 11:12:46,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:12:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1818543657, now seen corresponding path program 2 times [2023-01-28 11:12:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:12:46,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304858687] [2023-01-28 11:12:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:12:46,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:12:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:12:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:12:46,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:12:46,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304858687] [2023-01-28 11:12:46,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304858687] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:12:46,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104843984] [2023-01-28 11:12:46,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:12:46,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:12:46,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:12:46,696 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 11:12:46,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 11:12:46,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:12:46,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:12:46,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 39 conjunts are in the unsatisfiable core [2023-01-28 11:12:46,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:12:47,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:12:47,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 11:12:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:12:47,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:12:47,303 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:12:47,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-01-28 11:12:47,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-28 11:12:47,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:12:47,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104843984] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:12:47,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:12:47,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-01-28 11:12:47,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412882322] [2023-01-28 11:12:47,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:12:47,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 11:12:47,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:12:47,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 11:12:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2023-01-28 11:12:47,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 422 [2023-01-28 11:12:47,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 347 transitions, 4838 flow. Second operand has 25 states, 25 states have (on average 141.84) internal successors, (3546), 25 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:47,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:12:47,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 422 [2023-01-28 11:12:47,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:12:55,617 INFO L130 PetriNetUnfolder]: 27350/41636 cut-off events. [2023-01-28 11:12:55,617 INFO L131 PetriNetUnfolder]: For 641039/641159 co-relation queries the response was YES. [2023-01-28 11:12:55,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277745 conditions, 41636 events. 27350/41636 cut-off events. For 641039/641159 co-relation queries the response was YES. Maximal size of possible extension queue 1516. Compared 294735 event pairs, 4535 based on Foata normal form. 1066/42556 useless extension candidates. Maximal degree in co-relation 277688. Up to 9022 conditions per place. [2023-01-28 11:12:55,951 INFO L137 encePairwiseOnDemand]: 412/422 looper letters, 1052 selfloop transitions, 245 changer transitions 2/1303 dead transitions. [2023-01-28 11:12:55,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 1303 transitions, 19835 flow [2023-01-28 11:12:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 11:12:55,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 11:12:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3868 transitions. [2023-01-28 11:12:55,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35253372220196866 [2023-01-28 11:12:55,955 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3868 transitions. [2023-01-28 11:12:55,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3868 transitions. [2023-01-28 11:12:55,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:12:55,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3868 transitions. [2023-01-28 11:12:55,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 148.76923076923077) internal successors, (3868), 26 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:55,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 422.0) internal successors, (11394), 27 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:55,965 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 422.0) internal successors, (11394), 27 states have internal predecessors, (11394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:55,965 INFO L175 Difference]: Start difference. First operand has 153 places, 347 transitions, 4838 flow. Second operand 26 states and 3868 transitions. [2023-01-28 11:12:55,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 1303 transitions, 19835 flow [2023-01-28 11:12:59,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 1303 transitions, 19096 flow, removed 357 selfloop flow, removed 4 redundant places. [2023-01-28 11:12:59,832 INFO L231 Difference]: Finished difference. Result has 184 places, 490 transitions, 7729 flow [2023-01-28 11:12:59,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=7729, PETRI_PLACES=184, PETRI_TRANSITIONS=490} [2023-01-28 11:12:59,833 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 152 predicate places. [2023-01-28 11:12:59,833 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 490 transitions, 7729 flow [2023-01-28 11:12:59,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 141.84) internal successors, (3546), 25 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:12:59,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:12:59,843 INFO L208 CegarLoopForPetriNet]: trace histogram [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 11:12:59,848 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 11:13:00,047 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,SelfDestructingSolverStorable17 [2023-01-28 11:13:00,048 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 11:13:00,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash -904786089, now seen corresponding path program 3 times [2023-01-28 11:13:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:00,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805239279] [2023-01-28 11:13:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:00,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:13:00,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:00,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805239279] [2023-01-28 11:13:00,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805239279] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:00,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483100929] [2023-01-28 11:13:00,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:13:00,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:00,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:00,410 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 11:13:00,447 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 11:13:00,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:13:00,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:13:00,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 11:13:00,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:00,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:13:00,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2023-01-28 11:13:00,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-01-28 11:13:00,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:00,869 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:00,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2023-01-28 11:13:00,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-01-28 11:13:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-01-28 11:13:00,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483100929] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:13:00,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:13:00,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 18 [2023-01-28 11:13:00,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592942185] [2023-01-28 11:13:00,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:13:00,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 11:13:00,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:13:00,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 11:13:00,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-01-28 11:13:00,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 422 [2023-01-28 11:13:00,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 490 transitions, 7729 flow. Second operand has 19 states, 19 states have (on average 142.57894736842104) internal successors, (2709), 19 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:00,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:13:00,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 422 [2023-01-28 11:13:00,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:13:07,774 INFO L130 PetriNetUnfolder]: 26636/40174 cut-off events. [2023-01-28 11:13:07,774 INFO L131 PetriNetUnfolder]: For 741520/741620 co-relation queries the response was YES. [2023-01-28 11:13:08,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280688 conditions, 40174 events. 26636/40174 cut-off events. For 741520/741620 co-relation queries the response was YES. Maximal size of possible extension queue 1299. Compared 275229 event pairs, 6164 based on Foata normal form. 862/40886 useless extension candidates. Maximal degree in co-relation 280621. Up to 14217 conditions per place. [2023-01-28 11:13:08,501 INFO L137 encePairwiseOnDemand]: 413/422 looper letters, 665 selfloop transitions, 69 changer transitions 0/738 dead transitions. [2023-01-28 11:13:08,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 738 transitions, 12253 flow [2023-01-28 11:13:08,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 11:13:08,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 11:13:08,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1623 transitions. [2023-01-28 11:13:08,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3496337785437312 [2023-01-28 11:13:08,503 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1623 transitions. [2023-01-28 11:13:08,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1623 transitions. [2023-01-28 11:13:08,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:13:08,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1623 transitions. [2023-01-28 11:13:08,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 147.54545454545453) internal successors, (1623), 11 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:08,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 422.0) internal successors, (5064), 12 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:08,507 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 422.0) internal successors, (5064), 12 states have internal predecessors, (5064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:08,507 INFO L175 Difference]: Start difference. First operand has 184 places, 490 transitions, 7729 flow. Second operand 11 states and 1623 transitions. [2023-01-28 11:13:08,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 738 transitions, 12253 flow [2023-01-28 11:13:15,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 738 transitions, 11748 flow, removed 222 selfloop flow, removed 10 redundant places. [2023-01-28 11:13:15,358 INFO L231 Difference]: Finished difference. Result has 184 places, 476 transitions, 7088 flow [2023-01-28 11:13:15,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6764, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7088, PETRI_PLACES=184, PETRI_TRANSITIONS=476} [2023-01-28 11:13:15,359 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 152 predicate places. [2023-01-28 11:13:15,359 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 476 transitions, 7088 flow [2023-01-28 11:13:15,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 142.57894736842104) internal successors, (2709), 19 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:13:15,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:13:15,360 INFO L208 CegarLoopForPetriNet]: trace histogram [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 11:13:15,365 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 11:13:15,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:15,565 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 11:13:15,565 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:13:15,565 INFO L85 PathProgramCache]: Analyzing trace with hash 769622630, now seen corresponding path program 1 times [2023-01-28 11:13:15,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:13:15,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026788791] [2023-01-28 11:13:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:15,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:13:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:13:17,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:13:17,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026788791] [2023-01-28 11:13:17,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026788791] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:13:17,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970778634] [2023-01-28 11:13:17,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:13:17,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:13:17,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:13:17,907 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 11:13:17,913 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 11:13:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:13:18,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 70 conjunts are in the unsatisfiable core [2023-01-28 11:13:18,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:13:18,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:13:18,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 11:13:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:13:18,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:13:23,528 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (+ c_~t~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4))))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-01-28 11:13:25,546 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-01-28 11:13:56,386 WARN L222 SmtUtils]: Spent 30.70s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:13:57,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:57,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 382 treesize of output 509 [2023-01-28 11:13:57,077 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:57,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 265 treesize of output 276 [2023-01-28 11:13:57,097 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:57,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 235 treesize of output 228 [2023-01-28 11:13:57,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:13:57,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 204 [2023-01-28 11:14:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-01-28 11:14:00,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970778634] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:14:00,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:14:00,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 12] total 42 [2023-01-28 11:14:00,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820385216] [2023-01-28 11:14:00,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:14:00,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 11:14:00,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:14:00,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 11:14:00,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1611, Unknown=3, NotChecked=162, Total=1892 [2023-01-28 11:14:00,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 422 [2023-01-28 11:14:00,792 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 476 transitions, 7088 flow. Second operand has 44 states, 44 states have (on average 109.97727272727273) internal successors, (4839), 44 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:00,792 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:14:00,792 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 422 [2023-01-28 11:14:00,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:14:15,885 WARN L222 SmtUtils]: Spent 12.23s on a formula simplification. DAG size of input: 80 DAG size of output: 44 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:14:24,712 WARN L222 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 83 DAG size of output: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:14:32,908 INFO L130 PetriNetUnfolder]: 27797/42219 cut-off events. [2023-01-28 11:14:32,908 INFO L131 PetriNetUnfolder]: For 679815/679815 co-relation queries the response was YES. [2023-01-28 11:14:33,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291750 conditions, 42219 events. 27797/42219 cut-off events. For 679815/679815 co-relation queries the response was YES. Maximal size of possible extension queue 1372. Compared 294361 event pairs, 8795 based on Foata normal form. 4/42085 useless extension candidates. Maximal degree in co-relation 291686. Up to 39328 conditions per place. [2023-01-28 11:14:33,348 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 544 selfloop transitions, 128 changer transitions 3/675 dead transitions. [2023-01-28 11:14:33,348 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 675 transitions, 10350 flow [2023-01-28 11:14:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 11:14:33,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 11:14:33,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3320 transitions. [2023-01-28 11:14:33,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27128615786893284 [2023-01-28 11:14:33,366 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3320 transitions. [2023-01-28 11:14:33,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3320 transitions. [2023-01-28 11:14:33,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:14:33,366 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3320 transitions. [2023-01-28 11:14:33,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 114.48275862068965) internal successors, (3320), 29 states have internal predecessors, (3320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:33,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 422.0) internal successors, (12660), 30 states have internal predecessors, (12660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:33,388 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 422.0) internal successors, (12660), 30 states have internal predecessors, (12660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:33,388 INFO L175 Difference]: Start difference. First operand has 184 places, 476 transitions, 7088 flow. Second operand 29 states and 3320 transitions. [2023-01-28 11:14:33,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 675 transitions, 10350 flow [2023-01-28 11:14:37,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 675 transitions, 10132 flow, removed 28 selfloop flow, removed 9 redundant places. [2023-01-28 11:14:37,795 INFO L231 Difference]: Finished difference. Result has 214 places, 565 transitions, 8754 flow [2023-01-28 11:14:37,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8754, PETRI_PLACES=214, PETRI_TRANSITIONS=565} [2023-01-28 11:14:37,796 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 182 predicate places. [2023-01-28 11:14:37,796 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 565 transitions, 8754 flow [2023-01-28 11:14:37,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 109.97727272727273) internal successors, (4839), 44 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:14:37,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:14:37,797 INFO L208 CegarLoopForPetriNet]: trace histogram [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 11:14:37,805 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 11:14:38,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:14:38,002 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 11:14:38,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:14:38,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1119676476, now seen corresponding path program 2 times [2023-01-28 11:14:38,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:14:38,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068094365] [2023-01-28 11:14:38,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:14:38,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:14:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:14:39,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:14:39,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:14:39,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068094365] [2023-01-28 11:14:39,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068094365] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:14:39,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373179584] [2023-01-28 11:14:39,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 11:14:39,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:14:39,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:14:39,773 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 11:14:39,775 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 11:14:40,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:14:40,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:14:40,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 66 conjunts are in the unsatisfiable core [2023-01-28 11:14:40,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:14:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 11:14:41,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:14:43,905 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (+ c_~t~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4))))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-01-28 11:15:14,129 WARN L222 SmtUtils]: Spent 30.13s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:15:50,328 WARN L222 SmtUtils]: Spent 32.09s on a formula simplification that was a NOOP. DAG size: 48 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:15:50,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:15:50,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 293 [2023-01-28 11:15:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-01-28 11:15:53,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373179584] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:15:53,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:15:53,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 37 [2023-01-28 11:15:53,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574407687] [2023-01-28 11:15:53,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:15:53,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-01-28 11:15:53,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:15:53,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-01-28 11:15:53,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1303, Unknown=3, NotChecked=72, Total=1482 [2023-01-28 11:15:53,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 422 [2023-01-28 11:15:53,763 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 565 transitions, 8754 flow. Second operand has 39 states, 39 states have (on average 114.23076923076923) internal successors, (4455), 39 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:15:53,763 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:15:53,763 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 422 [2023-01-28 11:15:53,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:16:01,297 WARN L222 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 81 DAG size of output: 43 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:16:09,981 INFO L130 PetriNetUnfolder]: 28670/43613 cut-off events. [2023-01-28 11:16:09,981 INFO L131 PetriNetUnfolder]: For 710374/710374 co-relation queries the response was YES. [2023-01-28 11:16:10,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 309417 conditions, 43613 events. 28670/43613 cut-off events. For 710374/710374 co-relation queries the response was YES. Maximal size of possible extension queue 1429. Compared 307099 event pairs, 9473 based on Foata normal form. 4/43479 useless extension candidates. Maximal degree in co-relation 309345. Up to 41559 conditions per place. [2023-01-28 11:16:10,549 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 628 selfloop transitions, 132 changer transitions 3/763 dead transitions. [2023-01-28 11:16:10,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 763 transitions, 12351 flow [2023-01-28 11:16:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 11:16:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 11:16:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3447 transitions. [2023-01-28 11:16:10,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28166367053440106 [2023-01-28 11:16:10,553 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3447 transitions. [2023-01-28 11:16:10,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3447 transitions. [2023-01-28 11:16:10,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:16:10,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3447 transitions. [2023-01-28 11:16:10,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 118.86206896551724) internal successors, (3447), 29 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:10,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 422.0) internal successors, (12660), 30 states have internal predecessors, (12660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:10,562 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 422.0) internal successors, (12660), 30 states have internal predecessors, (12660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:10,562 INFO L175 Difference]: Start difference. First operand has 214 places, 565 transitions, 8754 flow. Second operand 29 states and 3447 transitions. [2023-01-28 11:16:10,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 763 transitions, 12351 flow [2023-01-28 11:16:17,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 763 transitions, 11861 flow, removed 235 selfloop flow, removed 5 redundant places. [2023-01-28 11:16:17,347 INFO L231 Difference]: Finished difference. Result has 249 places, 651 transitions, 10294 flow [2023-01-28 11:16:17,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=8312, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10294, PETRI_PLACES=249, PETRI_TRANSITIONS=651} [2023-01-28 11:16:17,348 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 217 predicate places. [2023-01-28 11:16:17,348 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 651 transitions, 10294 flow [2023-01-28 11:16:17,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 114.23076923076923) internal successors, (4455), 39 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:16:17,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:16:17,362 INFO L208 CegarLoopForPetriNet]: trace histogram [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 11:16:17,369 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 11:16:17,562 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,SelfDestructingSolverStorable20 [2023-01-28 11:16:17,563 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 11:16:17,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:16:17,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2424118, now seen corresponding path program 3 times [2023-01-28 11:16:17,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:16:17,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125315583] [2023-01-28 11:16:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:16:17,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:16:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:16:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:16:20,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:16:20,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125315583] [2023-01-28 11:16:20,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125315583] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:16:20,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807921326] [2023-01-28 11:16:20,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 11:16:20,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:16:20,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:16:20,076 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 11:16:20,105 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 11:16:20,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 11:16:20,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:16:20,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 95 conjunts are in the unsatisfiable core [2023-01-28 11:16:20,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:16:20,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 11:16:20,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 11:16:20,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:16:20,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:16:20,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 11:16:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 11:16:21,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:16:23,551 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:16:23,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 85 [2023-01-28 11:16:23,575 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:16:23,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 14197 treesize of output 13187 [2023-01-28 11:16:23,754 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:16:23,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1703 treesize of output 1539 [2023-01-28 11:16:23,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:16:23,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1499 treesize of output 1131 [2023-01-28 11:16:23,823 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:16:23,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1091 treesize of output 1029 [2023-01-28 11:16:36,623 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:16:36,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 105 [2023-01-28 11:16:36,710 INFO L321 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2023-01-28 11:16:36,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57030 treesize of output 52878 [2023-01-28 11:16:37,000 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:16:37,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1773 treesize of output 1421 [2023-01-28 11:16:37,056 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:16:37,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1360 treesize of output 1224 [2023-01-28 11:16:37,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:16:37,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1144 treesize of output 1116 [2023-01-28 11:17:14,682 INFO L321 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2023-01-28 11:17:14,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 160 treesize of output 1 [2023-01-28 11:17:14,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:17:14,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 120 treesize of output 85 [2023-01-28 11:17:14,742 INFO L321 Elim1Store]: treesize reduction 23, result has 51.1 percent of original size [2023-01-28 11:17:14,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 14845 treesize of output 13780 [2023-01-28 11:17:14,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:17:14,927 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:17:14,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1703 treesize of output 1311 [2023-01-28 11:17:14,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:17:14,961 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:17:14,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1295 treesize of output 1107 [2023-01-28 11:17:14,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 11:17:14,990 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:17:14,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1091 treesize of output 1005 [2023-01-28 11:17:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:17:18,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807921326] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:17:18,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:17:18,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 16] total 51 [2023-01-28 11:17:18,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62206964] [2023-01-28 11:17:18,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:17:18,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-01-28 11:17:18,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:17:18,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-01-28 11:17:18,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2500, Unknown=18, NotChecked=0, Total=2756 [2023-01-28 11:17:18,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 422 [2023-01-28 11:17:18,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 651 transitions, 10294 flow. Second operand has 53 states, 53 states have (on average 102.67924528301887) internal successors, (5442), 53 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:17:18,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:17:18,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 422 [2023-01-28 11:17:18,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:17:40,506 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:17:52,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:17:59,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:18:01,366 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:18:05,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:18:20,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:18:24,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:18:42,158 INFO L130 PetriNetUnfolder]: 40377/61190 cut-off events. [2023-01-28 11:18:42,158 INFO L131 PetriNetUnfolder]: For 1078160/1078160 co-relation queries the response was YES. [2023-01-28 11:18:42,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455193 conditions, 61190 events. 40377/61190 cut-off events. For 1078160/1078160 co-relation queries the response was YES. Maximal size of possible extension queue 2177. Compared 451508 event pairs, 6389 based on Foata normal form. 12/61064 useless extension candidates. Maximal degree in co-relation 455108. Up to 28291 conditions per place. [2023-01-28 11:18:43,059 INFO L137 encePairwiseOnDemand]: 401/422 looper letters, 824 selfloop transitions, 754 changer transitions 12/1590 dead transitions. [2023-01-28 11:18:43,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 1590 transitions, 25815 flow [2023-01-28 11:18:43,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-01-28 11:18:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-01-28 11:18:43,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 6897 transitions. [2023-01-28 11:18:43,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25942225231324756 [2023-01-28 11:18:43,075 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 6897 transitions. [2023-01-28 11:18:43,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 6897 transitions. [2023-01-28 11:18:43,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:18:43,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 6897 transitions. [2023-01-28 11:18:43,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 109.47619047619048) internal successors, (6897), 63 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:43,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 422.0) internal successors, (27008), 64 states have internal predecessors, (27008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:43,116 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 422.0) internal successors, (27008), 64 states have internal predecessors, (27008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:43,116 INFO L175 Difference]: Start difference. First operand has 249 places, 651 transitions, 10294 flow. Second operand 63 states and 6897 transitions. [2023-01-28 11:18:43,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 1590 transitions, 25815 flow [2023-01-28 11:18:53,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1590 transitions, 25031 flow, removed 340 selfloop flow, removed 9 redundant places. [2023-01-28 11:18:53,100 INFO L231 Difference]: Finished difference. Result has 329 places, 1203 transitions, 23008 flow [2023-01-28 11:18:53,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=9729, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=23008, PETRI_PLACES=329, PETRI_TRANSITIONS=1203} [2023-01-28 11:18:53,101 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 297 predicate places. [2023-01-28 11:18:53,101 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 1203 transitions, 23008 flow [2023-01-28 11:18:53,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 102.67924528301887) internal successors, (5442), 53 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:53,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:18:53,102 INFO L208 CegarLoopForPetriNet]: trace histogram [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 11:18:53,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-01-28 11:18:53,302 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,SelfDestructingSolverStorable21 [2023-01-28 11:18:53,302 INFO L420 AbstractCegarLoop]: === Iteration 23 === 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 11:18:53,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:18:53,303 INFO L85 PathProgramCache]: Analyzing trace with hash -537167506, now seen corresponding path program 4 times [2023-01-28 11:18:53,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:18:53,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665368114] [2023-01-28 11:18:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:18:53,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:18:53,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:18:54,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:18:54,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:18:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665368114] [2023-01-28 11:18:54,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665368114] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:18:54,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49525136] [2023-01-28 11:18:54,953 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 11:18:54,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:18:54,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:18:54,954 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 11:18:54,957 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 11:18:55,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 11:18:55,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:18:55,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 73 conjunts are in the unsatisfiable core [2023-01-28 11:18:55,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:18:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:18:55,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:18:56,802 INFO L321 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-01-28 11:18:56,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 249 [2023-01-28 11:18:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:18:58,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49525136] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:18:58,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:18:58,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 44 [2023-01-28 11:18:58,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141718432] [2023-01-28 11:18:58,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:18:58,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-01-28 11:18:58,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:18:58,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-01-28 11:18:58,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2023-01-28 11:18:58,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 422 [2023-01-28 11:18:58,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 1203 transitions, 23008 flow. Second operand has 46 states, 46 states have (on average 113.91304347826087) internal successors, (5240), 46 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:18:58,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:18:58,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 422 [2023-01-28 11:18:58,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:19:16,805 WARN L222 SmtUtils]: Spent 9.66s on a formula simplification. DAG size of input: 120 DAG size of output: 76 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:19:34,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:19:36,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:19:50,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:03,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:20:03,750 INFO L130 PetriNetUnfolder]: 43096/65741 cut-off events. [2023-01-28 11:20:03,751 INFO L131 PetriNetUnfolder]: For 1634142/1634142 co-relation queries the response was YES. [2023-01-28 11:20:04,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 585722 conditions, 65741 events. 43096/65741 cut-off events. For 1634142/1634142 co-relation queries the response was YES. Maximal size of possible extension queue 2381. Compared 495705 event pairs, 6204 based on Foata normal form. 8/65600 useless extension candidates. Maximal degree in co-relation 585611. Up to 26737 conditions per place. [2023-01-28 11:20:05,268 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 847 selfloop transitions, 950 changer transitions 18/1815 dead transitions. [2023-01-28 11:20:05,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1815 transitions, 35963 flow [2023-01-28 11:20:05,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-01-28 11:20:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-01-28 11:20:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 6716 transitions. [2023-01-28 11:20:05,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28419092755585645 [2023-01-28 11:20:05,273 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 6716 transitions. [2023-01-28 11:20:05,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 6716 transitions. [2023-01-28 11:20:05,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:20:05,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 6716 transitions. [2023-01-28 11:20:05,295 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 119.92857142857143) internal successors, (6716), 56 states have internal predecessors, (6716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:20:05,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 422.0) internal successors, (24054), 57 states have internal predecessors, (24054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:20:05,318 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 422.0) internal successors, (24054), 57 states have internal predecessors, (24054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:20:05,318 INFO L175 Difference]: Start difference. First operand has 329 places, 1203 transitions, 23008 flow. Second operand 56 states and 6716 transitions. [2023-01-28 11:20:05,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1815 transitions, 35963 flow [2023-01-28 11:20:34,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 1815 transitions, 32747 flow, removed 1578 selfloop flow, removed 14 redundant places. [2023-01-28 11:20:34,543 INFO L231 Difference]: Finished difference. Result has 389 places, 1484 transitions, 29171 flow [2023-01-28 11:20:34,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=20972, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=705, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=29171, PETRI_PLACES=389, PETRI_TRANSITIONS=1484} [2023-01-28 11:20:34,544 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 357 predicate places. [2023-01-28 11:20:34,544 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1484 transitions, 29171 flow [2023-01-28 11:20:34,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 113.91304347826087) internal successors, (5240), 46 states have internal predecessors, (5240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:20:34,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:20:34,545 INFO L208 CegarLoopForPetriNet]: trace histogram [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 11:20:34,550 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 11:20:34,749 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,SelfDestructingSolverStorable22 [2023-01-28 11:20:34,750 INFO L420 AbstractCegarLoop]: === Iteration 24 === 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 11:20:34,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:20:34,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1540089990, now seen corresponding path program 5 times [2023-01-28 11:20:34,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:20:34,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551617708] [2023-01-28 11:20:34,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:20:34,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:20:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:20:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:20:36,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:20:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551617708] [2023-01-28 11:20:36,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551617708] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:20:36,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194051685] [2023-01-28 11:20:36,309 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 11:20:36,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:20:36,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:20:36,310 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 11:20:36,312 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 11:20:36,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 11:20:36,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:20:36,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 87 conjunts are in the unsatisfiable core [2023-01-28 11:20:36,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:20:37,565 INFO L321 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2023-01-28 11:20:37,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 13 [2023-01-28 11:20:37,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:20:37,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:20:38,559 INFO L321 Elim1Store]: treesize reduction 22, result has 89.8 percent of original size [2023-01-28 11:20:38,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 129 treesize of output 249 [2023-01-28 11:20:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:20:40,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194051685] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:20:40,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:20:40,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2023-01-28 11:20:40,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884750766] [2023-01-28 11:20:40,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:20:40,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-01-28 11:20:40,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:20:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-01-28 11:20:40,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2206, Unknown=0, NotChecked=0, Total=2450 [2023-01-28 11:20:40,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 422 [2023-01-28 11:20:40,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 1484 transitions, 29171 flow. Second operand has 50 states, 50 states have (on average 113.8) internal successors, (5690), 50 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:20:40,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:20:40,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 422 [2023-01-28 11:20:40,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:20:56,098 WARN L222 SmtUtils]: Spent 5.97s on a formula simplification. DAG size of input: 153 DAG size of output: 106 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:21:07,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 11:21:12,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 11:21:33,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:21:42,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 11:21:52,759 WARN L222 SmtUtils]: Spent 7.55s on a formula simplification. DAG size of input: 91 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:21:56,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 11:22:00,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:02,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:05,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:11,359 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:22:27,575 INFO L130 PetriNetUnfolder]: 45531/69676 cut-off events. [2023-01-28 11:22:27,575 INFO L131 PetriNetUnfolder]: For 1843983/1843983 co-relation queries the response was YES. [2023-01-28 11:22:28,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635882 conditions, 69676 events. 45531/69676 cut-off events. For 1843983/1843983 co-relation queries the response was YES. Maximal size of possible extension queue 2442. Compared 530655 event pairs, 4326 based on Foata normal form. 7/69533 useless extension candidates. Maximal degree in co-relation 635754. Up to 25171 conditions per place. [2023-01-28 11:22:29,114 INFO L137 encePairwiseOnDemand]: 405/422 looper letters, 975 selfloop transitions, 1363 changer transitions 17/2355 dead transitions. [2023-01-28 11:22:29,114 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 2355 transitions, 46257 flow [2023-01-28 11:22:29,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-01-28 11:22:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-01-28 11:22:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 7934 transitions. [2023-01-28 11:22:29,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2848628464742209 [2023-01-28 11:22:29,121 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 7934 transitions. [2023-01-28 11:22:29,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 7934 transitions. [2023-01-28 11:22:29,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 11:22:29,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 7934 transitions. [2023-01-28 11:22:29,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 120.21212121212122) internal successors, (7934), 66 states have internal predecessors, (7934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:29,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 422.0) internal successors, (28274), 67 states have internal predecessors, (28274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:29,144 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 422.0) internal successors, (28274), 67 states have internal predecessors, (28274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:22:29,144 INFO L175 Difference]: Start difference. First operand has 389 places, 1484 transitions, 29171 flow. Second operand 66 states and 7934 transitions. [2023-01-28 11:22:29,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 2355 transitions, 46257 flow [2023-01-28 11:23:14,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 2355 transitions, 44120 flow, removed 954 selfloop flow, removed 21 redundant places. [2023-01-28 11:23:14,036 INFO L231 Difference]: Finished difference. Result has 459 places, 1888 transitions, 39243 flow [2023-01-28 11:23:14,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=422, PETRI_DIFFERENCE_MINUEND_FLOW=27555, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=981, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=39243, PETRI_PLACES=459, PETRI_TRANSITIONS=1888} [2023-01-28 11:23:14,038 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 427 predicate places. [2023-01-28 11:23:14,038 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 1888 transitions, 39243 flow [2023-01-28 11:23:14,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 113.8) internal successors, (5690), 50 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:23:14,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 11:23:14,039 INFO L208 CegarLoopForPetriNet]: trace histogram [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 11:23:14,044 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 11:23:14,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:23:14,244 INFO L420 AbstractCegarLoop]: === Iteration 25 === 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 11:23:14,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 11:23:14,245 INFO L85 PathProgramCache]: Analyzing trace with hash 447616768, now seen corresponding path program 6 times [2023-01-28 11:23:14,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 11:23:14,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661934446] [2023-01-28 11:23:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 11:23:14,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 11:23:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 11:23:15,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 11:23:15,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 11:23:15,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661934446] [2023-01-28 11:23:15,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661934446] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 11:23:15,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676317167] [2023-01-28 11:23:15,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 11:23:15,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:23:15,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 11:23:15,686 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 11:23:15,687 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 11:23:16,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 11:23:16,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 11:23:16,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 75 conjunts are in the unsatisfiable core [2023-01-28 11:23:16,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 11:23:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 11:23:16,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 11:23:19,180 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q2_back~0 4)) (.cse5 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset)))) (let ((.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse4)) .cse5)))) (.cse2 (mod c_~x~0 4294967296)) (.cse1 (* c_~C~0 2))) (and (or .cse0 (= (mod (+ .cse1 c_~z~0) 4294967296) .cse2)) (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse3 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (select .cse3 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (not (= (select .cse3 (+ ~q2~0.offset .cse4)) .cse5))))) (or .cse0 (= .cse2 (mod (+ c_~y~0 .cse1) 4294967296)))))) is different from false [2023-01-28 11:23:51,394 WARN L222 SmtUtils]: Spent 32.09s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:23:51,563 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 11:23:51,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 293 [2023-01-28 11:23:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-01-28 11:23:52,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676317167] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 11:23:52,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 11:23:52,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 42 [2023-01-28 11:23:52,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328372420] [2023-01-28 11:23:52,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 11:23:52,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-01-28 11:23:52,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 11:23:52,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-01-28 11:23:52,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1653, Unknown=1, NotChecked=82, Total=1892 [2023-01-28 11:23:52,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 422 [2023-01-28 11:23:52,810 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 1888 transitions, 39243 flow. Second operand has 44 states, 44 states have (on average 114.0) internal successors, (5016), 44 states have internal predecessors, (5016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 11:23:52,810 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 11:23:52,810 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 422 [2023-01-28 11:23:52,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 11:24:04,216 WARN L222 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 120 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:24:37,485 WARN L222 SmtUtils]: Spent 33.16s on a formula simplification. DAG size of input: 101 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:24:39,670 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse20 (* c_~q1_front~0 4))) (let ((.cse21 (+ .cse20 c_~q1~0.offset))) (let ((.cse17 (* c_~q2_back~0 4)) (.cse14 (* c_~C~0 2)) (.cse18 (select (select |c_#memory_int| c_~q1~0.base) .cse21))) (let ((.cse3 (or (<= c_~q2_back~0 0) (<= c_~n2~0 2))) (.cse5 (or (<= (+ c_~q2_front~0 c_~n2~0) 2) (<= c_~q2_front~0 0))) (.cse6 (< 0 (+ c_~q2_front~0 1))) (.cse7 (not (= c_~q2_front~0 0))) (.cse8 (= .cse18 1)) (.cse9 (<= 1 c_~N~0)) (.cse10 (<= .cse21 0)) (.cse11 (< 0 (+ .cse20 c_~q1~0.offset 1))) (.cse12 (not (= c_~q2_back~0 0))) (.cse4 (<= c_~n1~0 c_~q1_back~0)) (.cse1 (mod (+ .cse14 c_~z~0) 4294967296)) (.cse13 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse19 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (select .cse19 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (not (= (select .cse19 (+ ~q2~0.offset .cse17)) .cse18)))))) (.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse17)) .cse18)))) (.cse2 (mod c_~x~0 4294967296)) (.cse16 (mod (+ c_~y~0 .cse14) 4294967296))) (and (= c_~q2~0.offset 0) (or .cse0 (= .cse1 .cse2)) (= c_~y~0 0) .cse3 (or .cse4 (and .cse3 (or (and .cse5 .cse6 (or .cse7 (and .cse8 .cse9 (<= c_~x~0 c_~C~0) (<= |c_thread1Thread1of1ForFork2_~i~0#1| 1) (<= c_~C~0 c_~x~0) .cse10 .cse11))) .cse12))) .cse13 (or (and .cse5 .cse6 (or .cse7 (and (<= c_~x~0 .cse14) .cse8 .cse9 (<= .cse14 c_~x~0) (<= c_~N~0 1) .cse10 .cse11))) .cse12) (= c_~z~0 0) (or (< |c_thread1Thread1of1ForFork2_~i~0#1| c_~N~0) .cse4 (let ((.cse15 (mod (+ c_~C~0 c_~x~0) 4294967296))) (and (or (= .cse1 .cse15) .cse0) .cse13 (or .cse0 (= .cse16 .cse15)))) (< c_~q1_back~0 0)) (or .cse0 (= .cse2 .cse16))))))) is different from false [2023-01-28 11:24:46,147 WARN L222 SmtUtils]: Spent 6.22s on a formula simplification. DAG size of input: 85 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:25:08,633 WARN L222 SmtUtils]: Spent 22.42s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 11:25:10,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 11:25:12,923 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_~q2_back~0 4)) (.cse8 (select (select |c_#memory_int| c_~q1~0.base) (+ (* c_~q1_front~0 4) c_~q1~0.offset))) (.cse6 (* c_~C~0 2))) (let ((.cse1 (mod (+ .cse6 c_~z~0) 4294967296)) (.cse3 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (let ((.cse9 (select |c_#memory_int| ~q2~0.base))) (or (= c_~N~0 (select .cse9 (+ ~q2~0.offset (* c_~q2_front~0 4)))) (not (= (select .cse9 (+ ~q2~0.offset .cse7)) .cse8)))))) (.cse0 (forall ((~q2~0.base Int) (~q2~0.offset Int)) (not (= (select (select |c_#memory_int| ~q2~0.base) (+ ~q2~0.offset .cse7)) .cse8)))) (.cse2 (mod c_~x~0 4294967296)) (.cse5 (mod (+ c_~y~0 .cse6) 4294967296))) (and (or .cse0 (= .cse1 .cse2)) .cse3 (or (< |c_thread1Thread1of1ForFork2_~i~0#1| c_~N~0) (<= c_~n1~0 c_~q1_back~0) (let ((.cse4 (mod (+ c_~C~0 c_~x~0) 4294967296))) (and (or (= .cse1 .cse4) .cse0) .cse3 (or .cse0 (= .cse5 .cse4)))) (< c_~q1_back~0 0)) (or .cse0 (= .cse2 .cse5))))) is different from false [2023-01-28 11:25:16,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] Received shutdown request... [2023-01-28 11:26:06,751 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 11:26:06,752 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 11:26:07,709 WARN L238 SmtUtils]: Removed 5 from assertion stack [2023-01-28 11:26:07,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 11:26:07,711 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-01-28 11:26:07,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 11:26:07,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 11:26:07,912 WARN L619 AbstractCegarLoop]: Verification canceled: while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 75 for 38269ms.. [2023-01-28 11:26:07,913 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-01-28 11:26:07,913 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-01-28 11:26:07,913 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-01-28 11:26:07,914 INFO L445 BasicCegarLoop]: Path program histogram: [6, 6, 4, 3, 2, 1, 1, 1, 1] [2023-01-28 11:26:07,916 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 11:26:07,916 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 11:26:07,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 11:26:07 BasicIcfg [2023-01-28 11:26:07,919 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 11:26:07,919 INFO L158 Benchmark]: Toolchain (without parser) took 836112.55ms. Allocated memory was 354.4MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 301.5MB in the beginning and 5.2GB in the end (delta: -4.9GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. [2023-01-28 11:26:07,919 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 354.4MB. Free memory is still 300.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 11:26:07,920 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.07ms. Allocated memory is still 354.4MB. Free memory was 301.5MB in the beginning and 289.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 11:26:07,923 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.81ms. Allocated memory is still 354.4MB. Free memory was 289.0MB in the beginning and 286.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:26:07,923 INFO L158 Benchmark]: Boogie Preprocessor took 39.71ms. Allocated memory is still 354.4MB. Free memory was 286.9MB in the beginning and 284.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 11:26:07,924 INFO L158 Benchmark]: RCFGBuilder took 561.25ms. Allocated memory is still 354.4MB. Free memory was 284.8MB in the beginning and 249.1MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. [2023-01-28 11:26:07,924 INFO L158 Benchmark]: TraceAbstraction took 835227.55ms. Allocated memory was 354.4MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 248.1MB in the beginning and 5.2GB in the end (delta: -4.9GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. [2023-01-28 11:26:07,925 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 354.4MB. Free memory is still 300.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 232.07ms. Allocated memory is still 354.4MB. Free memory was 301.5MB in the beginning and 289.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 40.81ms. Allocated memory is still 354.4MB. Free memory was 289.0MB in the beginning and 286.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 39.71ms. Allocated memory is still 354.4MB. Free memory was 286.9MB in the beginning and 284.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 561.25ms. Allocated memory is still 354.4MB. Free memory was 284.8MB in the beginning and 249.1MB in the end (delta: 35.7MB). Peak memory consumption was 35.7MB. Max. memory is 16.0GB. * TraceAbstraction took 835227.55ms. Allocated memory was 354.4MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 248.1MB in the beginning and 5.2GB in the end (delta: -4.9GB). Peak memory consumption was 4.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.0s, 193 PlacesBefore, 32 PlacesAfterwards, 201 TransitionsBefore, 28 TransitionsAfterwards, 1880 CoEnabledTransitionPairs, 8 FixpointIterations, 123 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 27 TrivialYvCompositions, 11 ConcurrentYvCompositions, 12 ChoiceCompositions, 208 TotalNumberOfCompositions, 2630 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2077, independent: 2012, independent conditional: 0, independent unconditional: 2012, dependent: 65, dependent conditional: 0, dependent unconditional: 65, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1054, independent: 1034, independent conditional: 0, independent unconditional: 1034, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2077, independent: 978, independent conditional: 0, independent unconditional: 978, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 1054, unknown conditional: 0, unknown unconditional: 1054] , Statistics on independence cache: Total cache size (in pairs): 70, Positive cache size: 63, Positive conditional cache size: 0, Positive unconditional cache size: 63, 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 - TimeoutResultAtElement [Line: 135]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 75 for 38269ms.. - TimeoutResultAtElement [Line: 129]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 75 for 38269ms.. - TimeoutResultAtElement [Line: 127]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 75 for 38269ms.. - TimeoutResultAtElement [Line: 128]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 75 for 38269ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 233 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: 835.1s, OverallIterations: 25, TraceHistogramMax: 3, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 582.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 6.1s, HoareTripleCheckerStatistics: 67 mSolverCounterUnknown, 3913 SdHoareTripleChecker+Valid, 81.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3913 mSDsluCounter, 194 SdHoareTripleChecker+Invalid, 78.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1745 IncrementalHoareTripleChecker+Unchecked, 182 mSDsCounter, 764 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26396 IncrementalHoareTripleChecker+Invalid, 28972 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 764 mSolverCounterUnsat, 12 mSDtfsCounter, 26396 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1313 GetRequests, 554 SyntacticMatches, 15 SemanticMatches, 743 ConstructedPredicates, 6 IntricatePredicates, 1 DeprecatedPredicates, 10286 ImplicationChecksByTransitivity, 398.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39243occurred in iteration=24, InterpolantAutomatonStates: 434, 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, 2.4s SatisfiabilityAnalysisTime, 239.3s InterpolantComputationTime, 1085 NumberOfCodeBlocks, 1084 NumberOfCodeBlocksAsserted, 51 NumberOfCheckSat, 1429 ConstructedInterpolants, 169 QuantifiedInterpolants, 39712 SizeOfPredicates, 275 NumberOfNonLiveVariables, 5412 ConjunctsInSsa, 657 ConjunctsInUnsatCore, 54 InterpolantComputations, 11 PerfectInterpolantSequences, 138/373 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown