/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/parallel-parallel-sum-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 09:56:33,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 09:56:33,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 09:56:33,311 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 09:56:33,311 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 09:56:33,313 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 09:56:33,316 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 09:56:33,318 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 09:56:33,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 09:56:33,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 09:56:33,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 09:56:33,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 09:56:33,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 09:56:33,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 09:56:33,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 09:56:33,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 09:56:33,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 09:56:33,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 09:56:33,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 09:56:33,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 09:56:33,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 09:56:33,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 09:56:33,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 09:56:33,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 09:56:33,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-01-28 09:56:33,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 09:56:33,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 09:56:33,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 09:56:33,357 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 09:56:33,384 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 09:56:33,385 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 09:56:33,386 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 09:56:33,386 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 09:56:33,387 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 09:56:33,387 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 09:56:33,388 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 09:56:33,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 09:56:33,388 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 09:56:33,388 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 09:56:33,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 09:56:33,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 09:56:33,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 09:56:33,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 09:56:33,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 09:56:33,389 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 09:56:33,389 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 09:56:33,389 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 09:56:33,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 09:56:33,390 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 09:56:33,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 09:56:33,390 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 09:56:33,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 09:56:33,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:56:33,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 09:56:33,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 09:56:33,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 09:56:33,391 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 09:56:33,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 09:56:33,391 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 09:56:33,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 09:56:33,391 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-01-28 09:56:33,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 09:56:33,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 09:56:33,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 09:56:33,607 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 09:56:33,608 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 09:56:33,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-01-28 09:56:34,741 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 09:56:34,936 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 09:56:34,937 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-parallel-sum-2.wvr.c [2023-01-28 09:56:34,943 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9cb358a4/8443c825c87a4beba2110ef57348f414/FLAG65ce83618 [2023-01-28 09:56:34,957 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9cb358a4/8443c825c87a4beba2110ef57348f414 [2023-01-28 09:56:34,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 09:56:34,960 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 09:56:34,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 09:56:34,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 09:56:34,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 09:56:34,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:56:34" (1/1) ... [2023-01-28 09:56:34,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419e0644 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:34, skipping insertion in model container [2023-01-28 09:56:34,965 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 09:56:34" (1/1) ... [2023-01-28 09:56:34,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 09:56:34,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 09:56:35,136 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-01-28 09:56:35,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:56:35,168 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 09:56:35,197 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/parallel-parallel-sum-2.wvr.c[4225,4238] [2023-01-28 09:56:35,200 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 09:56:35,207 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 09:56:35,208 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 09:56:35,213 INFO L208 MainTranslator]: Completed translation [2023-01-28 09:56:35,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35 WrapperNode [2023-01-28 09:56:35,213 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 09:56:35,214 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 09:56:35,214 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 09:56:35,215 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 09:56:35,220 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (1/1) ... [2023-01-28 09:56:35,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (1/1) ... [2023-01-28 09:56:35,262 INFO L138 Inliner]: procedures = 29, calls = 88, calls flagged for inlining = 22, calls inlined = 32, statements flattened = 403 [2023-01-28 09:56:35,263 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 09:56:35,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 09:56:35,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 09:56:35,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 09:56:35,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (1/1) ... [2023-01-28 09:56:35,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (1/1) ... [2023-01-28 09:56:35,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (1/1) ... [2023-01-28 09:56:35,276 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (1/1) ... [2023-01-28 09:56:35,284 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (1/1) ... [2023-01-28 09:56:35,288 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (1/1) ... [2023-01-28 09:56:35,291 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (1/1) ... [2023-01-28 09:56:35,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (1/1) ... [2023-01-28 09:56:35,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 09:56:35,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 09:56:35,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 09:56:35,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 09:56:35,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (1/1) ... [2023-01-28 09:56:35,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 09:56:35,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:56:35,336 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 09:56:35,337 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 09:56:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 09:56:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 09:56:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 09:56:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 09:56:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 09:56:35,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 09:56:35,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 09:56:35,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 09:56:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-01-28 09:56:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-01-28 09:56:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-01-28 09:56:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-01-28 09:56:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 09:56:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-01-28 09:56:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-01-28 09:56:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2023-01-28 09:56:35,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2023-01-28 09:56:35,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 09:56:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 09:56:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 09:56:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 09:56:35,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 09:56:35,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 09:56:35,367 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 09:56:35,489 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 09:56:35,491 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 09:56:35,951 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 09:56:36,189 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 09:56:36,189 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-01-28 09:56:36,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:56:36 BoogieIcfgContainer [2023-01-28 09:56:36,192 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 09:56:36,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 09:56:36,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 09:56:36,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 09:56:36,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 09:56:34" (1/3) ... [2023-01-28 09:56:36,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575cfb4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:56:36, skipping insertion in model container [2023-01-28 09:56:36,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 09:56:35" (2/3) ... [2023-01-28 09:56:36,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@575cfb4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 09:56:36, skipping insertion in model container [2023-01-28 09:56:36,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 09:56:36" (3/3) ... [2023-01-28 09:56:36,200 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-2.wvr.c [2023-01-28 09:56:36,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 09:56:36,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 09:56:36,216 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 09:56:36,342 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-01-28 09:56:36,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 306 places, 310 transitions, 692 flow [2023-01-28 09:56:36,515 INFO L130 PetriNetUnfolder]: 21/266 cut-off events. [2023-01-28 09:56:36,515 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 09:56:36,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 266 events. 21/266 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 309 event pairs, 0 based on Foata normal form. 0/244 useless extension candidates. Maximal degree in co-relation 228. Up to 3 conditions per place. [2023-01-28 09:56:36,524 INFO L82 GeneralOperation]: Start removeDead. Operand has 306 places, 310 transitions, 692 flow [2023-01-28 09:56:36,533 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 256 places, 258 transitions, 564 flow [2023-01-28 09:56:36,536 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 09:56:36,553 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 256 places, 258 transitions, 564 flow [2023-01-28 09:56:36,555 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 256 places, 258 transitions, 564 flow [2023-01-28 09:56:36,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 256 places, 258 transitions, 564 flow [2023-01-28 09:56:36,607 INFO L130 PetriNetUnfolder]: 21/258 cut-off events. [2023-01-28 09:56:36,608 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 09:56:36,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287 conditions, 258 events. 21/258 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 306 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 228. Up to 3 conditions per place. [2023-01-28 09:56:36,617 INFO L119 LiptonReduction]: Number of co-enabled transitions 8992 [2023-01-28 09:56:43,988 INFO L134 LiptonReduction]: Checked pairs total: 29590 [2023-01-28 09:56:43,989 INFO L136 LiptonReduction]: Total number of compositions: 237 [2023-01-28 09:56:44,003 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 09:56:44,008 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;@547559dc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 09:56:44,008 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-01-28 09:56:44,017 INFO L130 PetriNetUnfolder]: 9/60 cut-off events. [2023-01-28 09:56:44,017 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 09:56:44,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:56:44,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:56:44,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-01-28 09:56:44,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:56:44,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1766388373, now seen corresponding path program 1 times [2023-01-28 09:56:44,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:56:44,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724028994] [2023-01-28 09:56:44,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:56:44,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:56:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:56:44,744 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 09:56:44,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:56:44,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724028994] [2023-01-28 09:56:44,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724028994] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:56:44,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 09:56:44,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 09:56:44,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518990511] [2023-01-28 09:56:44,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:56:44,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 09:56:44,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:56:44,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 09:56:44,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 09:56:44,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 241 out of 551 [2023-01-28 09:56:44,790 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 248.5) internal successors, (994), 4 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:44,790 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:56:44,790 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 241 of 551 [2023-01-28 09:56:44,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:56:45,689 INFO L130 PetriNetUnfolder]: 4669/6705 cut-off events. [2023-01-28 09:56:45,690 INFO L131 PetriNetUnfolder]: For 1489/1489 co-relation queries the response was YES. [2023-01-28 09:56:45,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14639 conditions, 6705 events. 4669/6705 cut-off events. For 1489/1489 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 31411 event pairs, 3014 based on Foata normal form. 36/4933 useless extension candidates. Maximal degree in co-relation 7761. Up to 3367 conditions per place. [2023-01-28 09:56:45,719 INFO L137 encePairwiseOnDemand]: 545/551 looper letters, 38 selfloop transitions, 2 changer transitions 31/93 dead transitions. [2023-01-28 09:56:45,719 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 93 transitions, 421 flow [2023-01-28 09:56:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 09:56:45,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 09:56:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1038 transitions. [2023-01-28 09:56:45,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470961887477314 [2023-01-28 09:56:45,741 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1038 transitions. [2023-01-28 09:56:45,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1038 transitions. [2023-01-28 09:56:45,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:56:45,747 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1038 transitions. [2023-01-28 09:56:45,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 259.5) internal successors, (1038), 4 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:45,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:45,764 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:45,766 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 170 flow. Second operand 4 states and 1038 transitions. [2023-01-28 09:56:45,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 93 transitions, 421 flow [2023-01-28 09:56:45,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 93 transitions, 359 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-01-28 09:56:45,800 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 156 flow [2023-01-28 09:56:45,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2023-01-28 09:56:45,807 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -7 predicate places. [2023-01-28 09:56:45,808 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 156 flow [2023-01-28 09:56:45,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 248.5) internal successors, (994), 4 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:45,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:56:45,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:56:45,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 09:56:45,810 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-01-28 09:56:45,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:56:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash 117533720, now seen corresponding path program 1 times [2023-01-28 09:56:45,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:56:45,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676739133] [2023-01-28 09:56:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:56:45,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:56:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:56:46,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:56:46,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:56:46,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676739133] [2023-01-28 09:56:46,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676739133] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:56:46,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243700553] [2023-01-28 09:56:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:56:46,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:56:46,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:56:46,630 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 09:56:46,660 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 09:56:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:56:46,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 41 conjunts are in the unsatisfiable core [2023-01-28 09:56:46,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:56:47,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:56:47,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:56:47,810 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 09:56:47,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243700553] provided 1 perfect and 1 imperfect interpolant sequences [2023-01-28 09:56:47,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-01-28 09:56:47,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 13 [2023-01-28 09:56:47,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620850578] [2023-01-28 09:56:47,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:56:47,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-28 09:56:47,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:56:47,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-28 09:56:47,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2023-01-28 09:56:47,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 551 [2023-01-28 09:56:47,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 62 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:47,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:56:47,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 551 [2023-01-28 09:56:47,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:56:48,715 INFO L130 PetriNetUnfolder]: 5283/7284 cut-off events. [2023-01-28 09:56:48,715 INFO L131 PetriNetUnfolder]: For 1133/1141 co-relation queries the response was YES. [2023-01-28 09:56:48,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15431 conditions, 7284 events. 5283/7284 cut-off events. For 1133/1141 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 31914 event pairs, 2115 based on Foata normal form. 5/5876 useless extension candidates. Maximal degree in co-relation 15419. Up to 4193 conditions per place. [2023-01-28 09:56:48,753 INFO L137 encePairwiseOnDemand]: 543/551 looper letters, 81 selfloop transitions, 8 changer transitions 9/120 dead transitions. [2023-01-28 09:56:48,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 120 transitions, 504 flow [2023-01-28 09:56:48,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 09:56:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 09:56:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1298 transitions. [2023-01-28 09:56:48,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4711433756805808 [2023-01-28 09:56:48,757 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1298 transitions. [2023-01-28 09:56:48,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1298 transitions. [2023-01-28 09:56:48,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:56:48,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1298 transitions. [2023-01-28 09:56:48,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 259.6) internal successors, (1298), 5 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:48,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 551.0) internal successors, (3306), 6 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:48,767 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 551.0) internal successors, (3306), 6 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:48,767 INFO L175 Difference]: Start difference. First operand has 64 places, 62 transitions, 156 flow. Second operand 5 states and 1298 transitions. [2023-01-28 09:56:48,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 120 transitions, 504 flow [2023-01-28 09:56:48,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 120 transitions, 494 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-01-28 09:56:48,777 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 211 flow [2023-01-28 09:56:48,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2023-01-28 09:56:48,778 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, -2 predicate places. [2023-01-28 09:56:48,779 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 211 flow [2023-01-28 09:56:48,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.2) internal successors, (1231), 5 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:48,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:56:48,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:56:48,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-01-28 09:56:48,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:56:48,987 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-01-28 09:56:48,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:56:48,988 INFO L85 PathProgramCache]: Analyzing trace with hash 918312716, now seen corresponding path program 2 times [2023-01-28 09:56:48,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:56:48,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415794679] [2023-01-28 09:56:48,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:56:48,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:56:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:56:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:56:49,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:56:49,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415794679] [2023-01-28 09:56:49,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415794679] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:56:49,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875328716] [2023-01-28 09:56:49,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 09:56:49,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:56:49,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:56:49,604 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 09:56:49,607 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 09:56:49,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-01-28 09:56:49,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 09:56:49,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 09:56:49,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:56:50,098 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 09:56:50,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 09:56:50,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875328716] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:56:50,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 09:56:50,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-01-28 09:56:50,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038383159] [2023-01-28 09:56:50,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:56:50,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-01-28 09:56:50,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:56:50,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-01-28 09:56:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-01-28 09:56:50,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 551 [2023-01-28 09:56:50,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 211 flow. Second operand has 6 states, 6 states have (on average 255.16666666666666) internal successors, (1531), 6 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:50,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:56:50,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 551 [2023-01-28 09:56:50,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:56:51,284 INFO L130 PetriNetUnfolder]: 7715/10366 cut-off events. [2023-01-28 09:56:51,284 INFO L131 PetriNetUnfolder]: For 4941/4993 co-relation queries the response was YES. [2023-01-28 09:56:51,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25631 conditions, 10366 events. 7715/10366 cut-off events. For 4941/4993 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 46113 event pairs, 2067 based on Foata normal form. 31/9569 useless extension candidates. Maximal degree in co-relation 25617. Up to 3712 conditions per place. [2023-01-28 09:56:51,354 INFO L137 encePairwiseOnDemand]: 542/551 looper letters, 106 selfloop transitions, 12 changer transitions 9/149 dead transitions. [2023-01-28 09:56:51,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 149 transitions, 690 flow [2023-01-28 09:56:51,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 09:56:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 09:56:51,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1625 transitions. [2023-01-28 09:56:51,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49153055051421657 [2023-01-28 09:56:51,359 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1625 transitions. [2023-01-28 09:56:51,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1625 transitions. [2023-01-28 09:56:51,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:56:51,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1625 transitions. [2023-01-28 09:56:51,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 270.8333333333333) internal successors, (1625), 6 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:51,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:51,370 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 551.0) internal successors, (3857), 7 states have internal predecessors, (3857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:51,371 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 211 flow. Second operand 6 states and 1625 transitions. [2023-01-28 09:56:51,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 149 transitions, 690 flow [2023-01-28 09:56:51,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 149 transitions, 670 flow, removed 10 selfloop flow, removed 2 redundant places. [2023-01-28 09:56:51,390 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 267 flow [2023-01-28 09:56:51,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2023-01-28 09:56:51,391 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2023-01-28 09:56:51,391 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 267 flow [2023-01-28 09:56:51,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 255.16666666666666) internal successors, (1531), 6 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:51,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:56:51,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:56:51,403 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 09:56:51,599 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,SelfDestructingSolverStorable2 [2023-01-28 09:56:51,599 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-01-28 09:56:51,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:56:51,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1783620550, now seen corresponding path program 1 times [2023-01-28 09:56:51,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:56:51,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501495660] [2023-01-28 09:56:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:56:51,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:56:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:56:51,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:56:51,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:56:51,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501495660] [2023-01-28 09:56:51,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501495660] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:56:51,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430665398] [2023-01-28 09:56:51,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:56:51,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:56:51,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:56:51,901 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 09:56:51,925 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 09:56:52,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:56:52,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 09:56:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:56:52,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:56:52,188 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-01-28 09:56:52,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430665398] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 09:56:52,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-01-28 09:56:52,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2023-01-28 09:56:52,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586830883] [2023-01-28 09:56:52,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 09:56:52,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 09:56:52,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:56:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 09:56:52,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-01-28 09:56:52,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 551 [2023-01-28 09:56:52,193 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 267 flow. Second operand has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:52,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:56:52,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 551 [2023-01-28 09:56:52,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:56:53,670 INFO L130 PetriNetUnfolder]: 11863/15713 cut-off events. [2023-01-28 09:56:53,671 INFO L131 PetriNetUnfolder]: For 8889/9087 co-relation queries the response was YES. [2023-01-28 09:56:53,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39689 conditions, 15713 events. 11863/15713 cut-off events. For 8889/9087 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 72010 event pairs, 2155 based on Foata normal form. 164/14651 useless extension candidates. Maximal degree in co-relation 39666. Up to 7293 conditions per place. [2023-01-28 09:56:53,755 INFO L137 encePairwiseOnDemand]: 545/551 looper letters, 96 selfloop transitions, 11 changer transitions 2/131 dead transitions. [2023-01-28 09:56:53,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 131 transitions, 648 flow [2023-01-28 09:56:53,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 09:56:53,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 09:56:53,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1103 transitions. [2023-01-28 09:56:53,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5004537205081669 [2023-01-28 09:56:53,759 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1103 transitions. [2023-01-28 09:56:53,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1103 transitions. [2023-01-28 09:56:53,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:56:53,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1103 transitions. [2023-01-28 09:56:53,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 275.75) internal successors, (1103), 4 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:53,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:53,767 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 551.0) internal successors, (2755), 5 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:53,767 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 267 flow. Second operand 4 states and 1103 transitions. [2023-01-28 09:56:53,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 131 transitions, 648 flow [2023-01-28 09:56:53,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 131 transitions, 635 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-01-28 09:56:53,801 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 301 flow [2023-01-28 09:56:53,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=301, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2023-01-28 09:56:53,802 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2023-01-28 09:56:53,802 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 301 flow [2023-01-28 09:56:53,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 258.0) internal successors, (1032), 4 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:53,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:56:53,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:56:53,813 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 09:56:54,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:56:54,010 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-01-28 09:56:54,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:56:54,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1944478364, now seen corresponding path program 1 times [2023-01-28 09:56:54,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:56:54,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228717033] [2023-01-28 09:56:54,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:56:54,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:56:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:56:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:56:54,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:56:54,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228717033] [2023-01-28 09:56:54,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228717033] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:56:54,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788253550] [2023-01-28 09:56:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:56:54,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:56:54,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:56:54,293 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 09:56:54,316 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 09:56:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:56:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 7 conjunts are in the unsatisfiable core [2023-01-28 09:56:54,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:56:54,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:56:54,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:56:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 09:56:54,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788253550] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:56:54,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:56:54,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-01-28 09:56:54,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670380905] [2023-01-28 09:56:54,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:56:54,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-01-28 09:56:54,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:56:54,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-01-28 09:56:54,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-01-28 09:56:54,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 551 [2023-01-28 09:56:54,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 301 flow. Second operand has 9 states, 9 states have (on average 248.77777777777777) internal successors, (2239), 9 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:54,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:56:54,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 551 [2023-01-28 09:56:54,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:56:56,476 INFO L130 PetriNetUnfolder]: 15199/20692 cut-off events. [2023-01-28 09:56:56,476 INFO L131 PetriNetUnfolder]: For 25443/25613 co-relation queries the response was YES. [2023-01-28 09:56:56,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52360 conditions, 20692 events. 15199/20692 cut-off events. For 25443/25613 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 105822 event pairs, 2824 based on Foata normal form. 1074/20023 useless extension candidates. Maximal degree in co-relation 49911. Up to 10211 conditions per place. [2023-01-28 09:56:56,557 INFO L137 encePairwiseOnDemand]: 542/551 looper letters, 122 selfloop transitions, 18 changer transitions 68/230 dead transitions. [2023-01-28 09:56:56,558 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 230 transitions, 1136 flow [2023-01-28 09:56:56,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 09:56:56,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 09:56:56,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2842 transitions. [2023-01-28 09:56:56,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4688995215311005 [2023-01-28 09:56:56,565 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2842 transitions. [2023-01-28 09:56:56,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2842 transitions. [2023-01-28 09:56:56,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:56:56,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2842 transitions. [2023-01-28 09:56:56,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 258.3636363636364) internal successors, (2842), 11 states have internal predecessors, (2842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:56,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 551.0) internal successors, (6612), 12 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:56,579 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 551.0) internal successors, (6612), 12 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:56,579 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 301 flow. Second operand 11 states and 2842 transitions. [2023-01-28 09:56:56,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 230 transitions, 1136 flow [2023-01-28 09:56:56,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 230 transitions, 1120 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 09:56:56,595 INFO L231 Difference]: Finished difference. Result has 88 places, 81 transitions, 356 flow [2023-01-28 09:56:56,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=356, PETRI_PLACES=88, PETRI_TRANSITIONS=81} [2023-01-28 09:56:56,596 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 17 predicate places. [2023-01-28 09:56:56,596 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 81 transitions, 356 flow [2023-01-28 09:56:56,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 248.77777777777777) internal successors, (2239), 9 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:56,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:56:56,597 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:56:56,603 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 09:56:56,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:56:56,803 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-01-28 09:56:56,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:56:56,804 INFO L85 PathProgramCache]: Analyzing trace with hash -501703849, now seen corresponding path program 1 times [2023-01-28 09:56:56,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:56:56,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115418637] [2023-01-28 09:56:56,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:56:56,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:56:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:56:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:56:58,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:56:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115418637] [2023-01-28 09:56:58,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115418637] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:56:58,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138367685] [2023-01-28 09:56:58,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:56:58,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:56:58,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:56:58,121 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 09:56:58,147 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 09:56:58,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:56:58,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 74 conjunts are in the unsatisfiable core [2023-01-28 09:56:58,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:56:58,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-01-28 09:56:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 09:56:58,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:56:59,083 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:56:59,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-01-28 09:56:59,103 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 09:56:59,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 14 [2023-01-28 09:56:59,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 09:56:59,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138367685] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:56:59,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:56:59,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-01-28 09:56:59,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901104829] [2023-01-28 09:56:59,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:56:59,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 09:56:59,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:56:59,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 09:56:59,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-01-28 09:56:59,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 551 [2023-01-28 09:56:59,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 81 transitions, 356 flow. Second operand has 18 states, 18 states have (on average 213.05555555555554) internal successors, (3835), 18 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:56:59,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:56:59,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 551 [2023-01-28 09:56:59,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:57:08,871 INFO L130 PetriNetUnfolder]: 79866/104592 cut-off events. [2023-01-28 09:57:08,872 INFO L131 PetriNetUnfolder]: For 105368/105528 co-relation queries the response was YES. [2023-01-28 09:57:09,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281581 conditions, 104592 events. 79866/104592 cut-off events. For 105368/105528 co-relation queries the response was YES. Maximal size of possible extension queue 2026. Compared 581335 event pairs, 8642 based on Foata normal form. 2114/100170 useless extension candidates. Maximal degree in co-relation 281566. Up to 15773 conditions per place. [2023-01-28 09:57:09,464 INFO L137 encePairwiseOnDemand]: 537/551 looper letters, 694 selfloop transitions, 170 changer transitions 81/960 dead transitions. [2023-01-28 09:57:09,464 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 960 transitions, 5353 flow [2023-01-28 09:57:09,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-01-28 09:57:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-01-28 09:57:09,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 8531 transitions. [2023-01-28 09:57:09,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418452935694315 [2023-01-28 09:57:09,484 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 8531 transitions. [2023-01-28 09:57:09,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 8531 transitions. [2023-01-28 09:57:09,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:57:09,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 8531 transitions. [2023-01-28 09:57:09,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 230.56756756756758) internal successors, (8531), 37 states have internal predecessors, (8531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:57:09,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 551.0) internal successors, (20938), 38 states have internal predecessors, (20938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:57:09,534 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 551.0) internal successors, (20938), 38 states have internal predecessors, (20938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:57:09,535 INFO L175 Difference]: Start difference. First operand has 88 places, 81 transitions, 356 flow. Second operand 37 states and 8531 transitions. [2023-01-28 09:57:09,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 960 transitions, 5353 flow [2023-01-28 09:57:09,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 960 transitions, 5185 flow, removed 73 selfloop flow, removed 3 redundant places. [2023-01-28 09:57:09,788 INFO L231 Difference]: Finished difference. Result has 138 places, 258 transitions, 1990 flow [2023-01-28 09:57:09,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1990, PETRI_PLACES=138, PETRI_TRANSITIONS=258} [2023-01-28 09:57:09,789 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 67 predicate places. [2023-01-28 09:57:09,789 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 258 transitions, 1990 flow [2023-01-28 09:57:09,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 213.05555555555554) internal successors, (3835), 18 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:57:09,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:57:09,790 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:57:09,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 09:57:09,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:57:09,996 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-01-28 09:57:09,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:57:09,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1680073653, now seen corresponding path program 1 times [2023-01-28 09:57:09,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:57:09,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485031717] [2023-01-28 09:57:09,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:57:09,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:57:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:57:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:57:11,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:57:11,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485031717] [2023-01-28 09:57:11,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485031717] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:57:11,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498993798] [2023-01-28 09:57:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:57:11,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:57:11,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:57:11,305 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 09:57:11,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 09:57:11,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:57:11,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 86 conjunts are in the unsatisfiable core [2023-01-28 09:57:11,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:57:12,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 09:57:12,282 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 14 treesize of output 16 [2023-01-28 09:57:12,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:57:12,464 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 17 treesize of output 15 [2023-01-28 09:57:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:57:12,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:57:12,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2023-01-28 09:57:12,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 09:57:13,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:57:13,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498993798] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:57:13,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:57:13,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-01-28 09:57:13,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805336663] [2023-01-28 09:57:13,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:57:13,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 09:57:13,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:57:13,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 09:57:13,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=774, Unknown=1, NotChecked=0, Total=870 [2023-01-28 09:57:13,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 551 [2023-01-28 09:57:13,444 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 258 transitions, 1990 flow. Second operand has 30 states, 30 states have (on average 202.3) internal successors, (6069), 30 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:57:13,444 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:57:13,444 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 551 [2023-01-28 09:57:13,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 09:57:38,380 WARN L222 SmtUtils]: Spent 6.27s on a formula simplification. DAG size of input: 56 DAG size of output: 51 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-01-28 09:57:57,310 INFO L130 PetriNetUnfolder]: 156421/206679 cut-off events. [2023-01-28 09:57:57,310 INFO L131 PetriNetUnfolder]: For 372133/372313 co-relation queries the response was YES. [2023-01-28 09:57:58,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618917 conditions, 206679 events. 156421/206679 cut-off events. For 372133/372313 co-relation queries the response was YES. Maximal size of possible extension queue 3902. Compared 1254347 event pairs, 9630 based on Foata normal form. 499/193987 useless extension candidates. Maximal degree in co-relation 618880. Up to 31490 conditions per place. [2023-01-28 09:57:58,818 INFO L137 encePairwiseOnDemand]: 533/551 looper letters, 1311 selfloop transitions, 445 changer transitions 148/1915 dead transitions. [2023-01-28 09:57:58,819 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 1915 transitions, 12903 flow [2023-01-28 09:57:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-01-28 09:57:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-01-28 09:57:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 17673 transitions. [2023-01-28 09:57:58,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395980372386906 [2023-01-28 09:57:58,846 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 17673 transitions. [2023-01-28 09:57:58,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 17673 transitions. [2023-01-28 09:57:58,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 09:57:58,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 17673 transitions. [2023-01-28 09:57:58,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 218.1851851851852) internal successors, (17673), 81 states have internal predecessors, (17673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:57:58,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 551.0) internal successors, (45182), 82 states have internal predecessors, (45182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:57:58,935 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 551.0) internal successors, (45182), 82 states have internal predecessors, (45182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:57:58,936 INFO L175 Difference]: Start difference. First operand has 138 places, 258 transitions, 1990 flow. Second operand 81 states and 17673 transitions. [2023-01-28 09:57:58,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 1915 transitions, 12903 flow [2023-01-28 09:58:04,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 1915 transitions, 11753 flow, removed 452 selfloop flow, removed 14 redundant places. [2023-01-28 09:58:04,953 INFO L231 Difference]: Finished difference. Result has 243 places, 604 transitions, 5791 flow [2023-01-28 09:58:04,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=1610, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=81, PETRI_FLOW=5791, PETRI_PLACES=243, PETRI_TRANSITIONS=604} [2023-01-28 09:58:04,954 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 172 predicate places. [2023-01-28 09:58:04,954 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 604 transitions, 5791 flow [2023-01-28 09:58:04,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 202.3) internal successors, (6069), 30 states have internal predecessors, (6069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:58:04,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 09:58:04,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 09:58:04,963 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 09:58:05,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:58:05,164 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-01-28 09:58:05,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 09:58:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1353551839, now seen corresponding path program 1 times [2023-01-28 09:58:05,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 09:58:05,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158059815] [2023-01-28 09:58:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:58:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 09:58:05,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:58:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:58:06,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 09:58:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158059815] [2023-01-28 09:58:06,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158059815] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 09:58:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514224493] [2023-01-28 09:58:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 09:58:06,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 09:58:06,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 09:58:06,369 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 09:58:06,371 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 09:58:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 09:58:06,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 92 conjunts are in the unsatisfiable core [2023-01-28 09:58:06,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 09:58:07,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 09:58:07,568 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 14 treesize of output 16 [2023-01-28 09:58:07,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-01-28 09:58:07,915 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:58:07,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 09:58:08,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 09:58:08,299 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 62 treesize of output 43 [2023-01-28 09:58:08,304 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 20 treesize of output 13 [2023-01-28 09:58:08,319 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 09:58:08,326 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 09:58:08,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 14 [2023-01-28 09:58:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 09:58:09,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514224493] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 09:58:09,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 09:58:09,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-01-28 09:58:09,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87401148] [2023-01-28 09:58:09,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 09:58:09,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 09:58:09,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 09:58:09,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 09:58:09,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=703, Unknown=2, NotChecked=0, Total=812 [2023-01-28 09:58:09,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 551 [2023-01-28 09:58:09,036 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 604 transitions, 5791 flow. Second operand has 29 states, 29 states have (on average 202.17241379310346) internal successors, (5863), 29 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 09:58:09,036 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 09:58:09,036 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 551 [2023-01-28 09:58:09,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 10:00:07,708 INFO L130 PetriNetUnfolder]: 333102/437684 cut-off events. [2023-01-28 10:00:07,708 INFO L131 PetriNetUnfolder]: For 1532344/1532608 co-relation queries the response was YES. [2023-01-28 10:00:12,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1425805 conditions, 437684 events. 333102/437684 cut-off events. For 1532344/1532608 co-relation queries the response was YES. Maximal size of possible extension queue 8510. Compared 2856145 event pairs, 24234 based on Foata normal form. 472/410305 useless extension candidates. Maximal degree in co-relation 1425731. Up to 75324 conditions per place. [2023-01-28 10:00:13,630 INFO L137 encePairwiseOnDemand]: 533/551 looper letters, 1601 selfloop transitions, 971 changer transitions 236/2819 dead transitions. [2023-01-28 10:00:13,631 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 2819 transitions, 25597 flow [2023-01-28 10:00:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-01-28 10:00:13,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-01-28 10:00:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 18034 transitions. [2023-01-28 10:00:13,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39914125094064007 [2023-01-28 10:00:13,650 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 18034 transitions. [2023-01-28 10:00:13,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 18034 transitions. [2023-01-28 10:00:13,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 10:00:13,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 18034 transitions. [2023-01-28 10:00:13,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 219.9268292682927) internal successors, (18034), 82 states have internal predecessors, (18034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:00:13,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 551.0) internal successors, (45733), 83 states have internal predecessors, (45733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:00:13,714 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 551.0) internal successors, (45733), 83 states have internal predecessors, (45733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:00:13,714 INFO L175 Difference]: Start difference. First operand has 243 places, 604 transitions, 5791 flow. Second operand 82 states and 18034 transitions. [2023-01-28 10:00:13,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 2819 transitions, 25597 flow [2023-01-28 10:01:26,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 2819 transitions, 23529 flow, removed 1025 selfloop flow, removed 11 redundant places. [2023-01-28 10:01:26,184 INFO L231 Difference]: Finished difference. Result has 331 places, 1360 transitions, 16448 flow [2023-01-28 10:01:26,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=551, PETRI_DIFFERENCE_MINUEND_FLOW=4961, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=16448, PETRI_PLACES=331, PETRI_TRANSITIONS=1360} [2023-01-28 10:01:26,185 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 260 predicate places. [2023-01-28 10:01:26,185 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 1360 transitions, 16448 flow [2023-01-28 10:01:26,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 202.17241379310346) internal successors, (5863), 29 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:01:26,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 10:01:26,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 10:01:26,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 10:01:26,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:01:26,387 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err8INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 8 more)] === [2023-01-28 10:01:26,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 10:01:26,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1258338883, now seen corresponding path program 2 times [2023-01-28 10:01:26,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 10:01:26,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084526797] [2023-01-28 10:01:26,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 10:01:26,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 10:01:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 10:01:27,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 10:01:27,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 10:01:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084526797] [2023-01-28 10:01:27,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084526797] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 10:01:27,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967276294] [2023-01-28 10:01:27,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 10:01:27,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 10:01:27,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 10:01:27,417 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 10:01:27,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 10:01:27,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 10:01:27,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 10:01:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 74 conjunts are in the unsatisfiable core [2023-01-28 10:01:27,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 10:01:28,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-01-28 10:01:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:01:28,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 10:01:28,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 10:01:28,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 18 [2023-01-28 10:01:28,430 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-01-28 10:01:28,430 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 28 treesize of output 15 [2023-01-28 10:01:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 10:01:28,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967276294] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 10:01:28,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 10:01:28,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 17 [2023-01-28 10:01:28,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053566281] [2023-01-28 10:01:28,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 10:01:28,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-01-28 10:01:28,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 10:01:28,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-01-28 10:01:28,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-01-28 10:01:28,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 551 [2023-01-28 10:01:28,700 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 1360 transitions, 16448 flow. Second operand has 18 states, 18 states have (on average 213.16666666666666) internal successors, (3837), 18 states have internal predecessors, (3837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 10:01:28,700 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 10:01:28,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 551 [2023-01-28 10:01:28,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand