/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 BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 05:24:36,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 05:24:36,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 05:24:36,328 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-01-28 05:24:36,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 05:24:36,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 05:24:36,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 05:24:36,349 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 05:24:36,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 05:24:36,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 05:24:36,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 05:24:36,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 05:24:36,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 05:24:36,355 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 05:24:36,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 05:24:36,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 05:24:36,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 05:24:36,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 05:24:36,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 05:24:36,358 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 05:24:36,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 05:24:36,359 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 05:24:36,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 05:24:36,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 05:24:36,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 05:24:36,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 05:24:36,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 05:24:36,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 05:24:36,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 05:24:36,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 05:24:36,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 05:24:36,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 05:24:36,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 05:24:36,367 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 05:24:36,392 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 05:24:36,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 05:24:36,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 05:24:36,392 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 05:24:36,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 05:24:36,393 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 05:24:36,393 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 05:24:36,393 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 05:24:36,393 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 05:24:36,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 05:24:36,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 05:24:36,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 05:24:36,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 05:24:36,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 05:24:36,394 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 05:24:36,394 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 05:24:36,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 05:24:36,394 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 05:24:36,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 05:24:36,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 05:24:36,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 05:24:36,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 05:24:36,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 05:24:36,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 05:24:36,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 05:24:36,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 05:24:36,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 05:24:36,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 05:24:36,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 05:24:36,395 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 05:24:36,395 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 05:24:36,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 05:24:36,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 05:24:36,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 05:24:36,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 05:24:36,606 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 05:24:36,607 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 05:24:36,607 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-01-28 05:24:37,577 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 05:24:37,773 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 05:24:37,774 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-01-28 05:24:37,779 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83743e7a4/50ce34b42cb148429859f409775e23a8/FLAG01ff1292c [2023-01-28 05:24:37,790 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83743e7a4/50ce34b42cb148429859f409775e23a8 [2023-01-28 05:24:37,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 05:24:37,792 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 05:24:37,793 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 05:24:37,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 05:24:37,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 05:24:37,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,797 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e22aed3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37, skipping insertion in model container [2023-01-28 05:24:37,797 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,801 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 05:24:37,812 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 05:24:37,912 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2438,2451] [2023-01-28 05:24:37,917 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 05:24:37,923 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 05:24:37,935 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c[2438,2451] [2023-01-28 05:24:37,937 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 05:24:37,943 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 05:24:37,943 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 05:24:37,948 INFO L208 MainTranslator]: Completed translation [2023-01-28 05:24:37,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37 WrapperNode [2023-01-28 05:24:37,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 05:24:37,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 05:24:37,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 05:24:37,949 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 05:24:37,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,973 INFO L138 Inliner]: procedures = 24, calls = 33, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 133 [2023-01-28 05:24:37,974 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 05:24:37,974 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 05:24:37,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 05:24:37,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 05:24:37,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,983 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,991 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,992 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,993 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 05:24:37,994 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 05:24:37,994 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 05:24:37,994 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 05:24:37,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (1/1) ... [2023-01-28 05:24:37,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 05:24:38,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:24:38,023 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 05:24:38,027 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 05:24:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 05:24:38,051 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 05:24:38,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 05:24:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 05:24:38,052 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 05:24:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 05:24:38,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 05:24:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 05:24:38,053 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 05:24:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 05:24:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-01-28 05:24:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 05:24:38,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 05:24:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 05:24:38,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 05:24:38,055 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 05:24:38,176 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 05:24:38,178 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 05:24:38,415 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 05:24:38,475 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 05:24:38,475 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-01-28 05:24:38,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 05:24:38 BoogieIcfgContainer [2023-01-28 05:24:38,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 05:24:38,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 05:24:38,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 05:24:38,480 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 05:24:38,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 05:24:37" (1/3) ... [2023-01-28 05:24:38,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b751ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 05:24:38, skipping insertion in model container [2023-01-28 05:24:38,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:24:37" (2/3) ... [2023-01-28 05:24:38,481 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b751ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 05:24:38, skipping insertion in model container [2023-01-28 05:24:38,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 05:24:38" (3/3) ... [2023-01-28 05:24:38,482 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-01-28 05:24:38,494 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 05:24:38,494 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 05:24:38,494 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 05:24:38,548 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 05:24:38,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 115 transitions, 246 flow [2023-01-28 05:24:38,622 INFO L130 PetriNetUnfolder]: 9/113 cut-off events. [2023-01-28 05:24:38,622 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:24:38,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 113 events. 9/113 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-28 05:24:38,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 115 transitions, 246 flow [2023-01-28 05:24:38,633 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 103 places, 105 transitions, 222 flow [2023-01-28 05:24:38,635 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 05:24:38,641 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 103 places, 105 transitions, 222 flow [2023-01-28 05:24:38,643 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 103 places, 105 transitions, 222 flow [2023-01-28 05:24:38,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 105 transitions, 222 flow [2023-01-28 05:24:38,663 INFO L130 PetriNetUnfolder]: 9/105 cut-off events. [2023-01-28 05:24:38,664 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:24:38,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 105 events. 9/105 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/96 useless extension candidates. Maximal degree in co-relation 81. Up to 2 conditions per place. [2023-01-28 05:24:38,665 INFO L119 LiptonReduction]: Number of co-enabled transitions 432 [2023-01-28 05:24:41,399 INFO L134 LiptonReduction]: Checked pairs total: 467 [2023-01-28 05:24:41,400 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-01-28 05:24:41,424 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 05:24:41,429 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;@36b5ff13, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 05:24:41,429 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 05:24:41,453 INFO L130 PetriNetUnfolder]: 3/14 cut-off events. [2023-01-28 05:24:41,454 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:24:41,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:41,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:41,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:41,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:41,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1505763338, now seen corresponding path program 1 times [2023-01-28 05:24:41,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:41,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608727955] [2023-01-28 05:24:41,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:41,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:41,727 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 05:24:41,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:41,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608727955] [2023-01-28 05:24:41,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608727955] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:24:41,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:24:41,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-01-28 05:24:41,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731464273] [2023-01-28 05:24:41,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:24:41,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 05:24:41,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:41,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 05:24:41,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 05:24:41,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 224 [2023-01-28 05:24:41,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:41,761 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:41,761 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 224 [2023-01-28 05:24:41,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:41,811 INFO L130 PetriNetUnfolder]: 38/71 cut-off events. [2023-01-28 05:24:41,811 INFO L131 PetriNetUnfolder]: For 13/13 co-relation queries the response was YES. [2023-01-28 05:24:41,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 71 events. 38/71 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 133 event pairs, 9 based on Foata normal form. 1/49 useless extension candidates. Maximal degree in co-relation 100. Up to 37 conditions per place. [2023-01-28 05:24:41,814 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 19 selfloop transitions, 2 changer transitions 2/23 dead transitions. [2023-01-28 05:24:41,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 23 transitions, 110 flow [2023-01-28 05:24:41,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 05:24:41,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 05:24:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-01-28 05:24:41,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47767857142857145 [2023-01-28 05:24:41,829 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-01-28 05:24:41,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-01-28 05:24:41,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:41,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-01-28 05:24:41,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:41,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:41,844 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:41,845 INFO L175 Difference]: Start difference. First operand has 19 places, 15 transitions, 42 flow. Second operand 3 states and 321 transitions. [2023-01-28 05:24:41,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 23 transitions, 110 flow [2023-01-28 05:24:41,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 05:24:41,848 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 46 flow [2023-01-28 05:24:41,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-01-28 05:24:41,852 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, -1 predicate places. [2023-01-28 05:24:41,853 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 46 flow [2023-01-28 05:24:41,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:41,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:41,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:41,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 05:24:41,854 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:41,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:41,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1116336325, now seen corresponding path program 1 times [2023-01-28 05:24:41,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:41,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693856522] [2023-01-28 05:24:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:41,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:41,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:41,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:41,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693856522] [2023-01-28 05:24:41,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693856522] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:24:41,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:24:41,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-01-28 05:24:41,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500000109] [2023-01-28 05:24:41,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:24:42,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-28 05:24:42,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:42,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-28 05:24:42,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-28 05:24:42,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 224 [2023-01-28 05:24:42,001 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:42,001 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:42,001 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 224 [2023-01-28 05:24:42,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:42,036 INFO L130 PetriNetUnfolder]: 52/102 cut-off events. [2023-01-28 05:24:42,036 INFO L131 PetriNetUnfolder]: For 15/15 co-relation queries the response was YES. [2023-01-28 05:24:42,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 102 events. 52/102 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 257 event pairs, 17 based on Foata normal form. 6/91 useless extension candidates. Maximal degree in co-relation 135. Up to 74 conditions per place. [2023-01-28 05:24:42,037 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 18 selfloop transitions, 2 changer transitions 5/25 dead transitions. [2023-01-28 05:24:42,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 117 flow [2023-01-28 05:24:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-28 05:24:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-28 05:24:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 310 transitions. [2023-01-28 05:24:42,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2023-01-28 05:24:42,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 310 transitions. [2023-01-28 05:24:42,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 310 transitions. [2023-01-28 05:24:42,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:42,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 310 transitions. [2023-01-28 05:24:42,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:42,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:42,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:42,042 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 46 flow. Second operand 3 states and 310 transitions. [2023-01-28 05:24:42,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 117 flow [2023-01-28 05:24:42,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 05:24:42,043 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 56 flow [2023-01-28 05:24:42,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-01-28 05:24:42,044 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 1 predicate places. [2023-01-28 05:24:42,044 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 56 flow [2023-01-28 05:24:42,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:42,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:42,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:42,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 05:24:42,044 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:42,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:42,045 INFO L85 PathProgramCache]: Analyzing trace with hash -128502642, now seen corresponding path program 1 times [2023-01-28 05:24:42,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:42,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70306719] [2023-01-28 05:24:42,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:42,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:42,123 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 05:24:42,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:42,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70306719] [2023-01-28 05:24:42,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70306719] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:24:42,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:24:42,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 05:24:42,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588660588] [2023-01-28 05:24:42,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:24:42,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 05:24:42,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 05:24:42,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-28 05:24:42,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 224 [2023-01-28 05:24:42,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 56 flow. Second operand has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:42,126 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:42,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 224 [2023-01-28 05:24:42,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:42,190 INFO L130 PetriNetUnfolder]: 61/130 cut-off events. [2023-01-28 05:24:42,190 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2023-01-28 05:24:42,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 130 events. 61/130 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 368 event pairs, 44 based on Foata normal form. 6/134 useless extension candidates. Maximal degree in co-relation 212. Up to 103 conditions per place. [2023-01-28 05:24:42,191 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 16 selfloop transitions, 2 changer transitions 10/28 dead transitions. [2023-01-28 05:24:42,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 138 flow [2023-01-28 05:24:42,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:24:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 05:24:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2023-01-28 05:24:42,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42299107142857145 [2023-01-28 05:24:42,192 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2023-01-28 05:24:42,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2023-01-28 05:24:42,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:42,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2023-01-28 05:24:42,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:42,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:42,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:42,195 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 56 flow. Second operand 4 states and 379 transitions. [2023-01-28 05:24:42,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 138 flow [2023-01-28 05:24:42,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-01-28 05:24:42,196 INFO L231 Difference]: Finished difference. Result has 24 places, 18 transitions, 68 flow [2023-01-28 05:24:42,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=24, PETRI_TRANSITIONS=18} [2023-01-28 05:24:42,196 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 5 predicate places. [2023-01-28 05:24:42,197 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 18 transitions, 68 flow [2023-01-28 05:24:42,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 91.5) internal successors, (366), 4 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:42,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:42,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:42,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-28 05:24:42,197 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:42,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:42,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1064831031, now seen corresponding path program 1 times [2023-01-28 05:24:42,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:42,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993234714] [2023-01-28 05:24:42,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:42,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:42,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:42,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993234714] [2023-01-28 05:24:42,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993234714] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:24:42,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205277003] [2023-01-28 05:24:42,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:42,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:42,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:24:42,569 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 05:24:42,570 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 05:24:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:42,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 38 conjunts are in the unsatisfiable core [2023-01-28 05:24:42,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:24:42,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-01-28 05:24:42,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:24:42,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:24:42,902 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 16 treesize of output 18 [2023-01-28 05:24:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:42,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:24:43,128 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:24:43,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 45 [2023-01-28 05:24:43,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:24:43,138 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 178 treesize of output 162 [2023-01-28 05:24:43,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:24:43,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 48 [2023-01-28 05:24:43,235 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 28 treesize of output 16 [2023-01-28 05:24:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:43,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205277003] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:24:43,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:24:43,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-01-28 05:24:43,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113412324] [2023-01-28 05:24:43,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:24:43,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 05:24:43,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:43,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 05:24:43,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2023-01-28 05:24:43,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 224 [2023-01-28 05:24:43,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 18 transitions, 68 flow. Second operand has 17 states, 17 states have (on average 66.05882352941177) internal successors, (1123), 17 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:43,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:43,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 224 [2023-01-28 05:24:43,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:43,524 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_73 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) (= 5 c_~x~0)) is different from false [2023-01-28 05:24:45,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:24:45,948 INFO L130 PetriNetUnfolder]: 233/456 cut-off events. [2023-01-28 05:24:45,948 INFO L131 PetriNetUnfolder]: For 160/160 co-relation queries the response was YES. [2023-01-28 05:24:45,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133 conditions, 456 events. 233/456 cut-off events. For 160/160 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2005 event pairs, 35 based on Foata normal form. 3/455 useless extension candidates. Maximal degree in co-relation 1117. Up to 120 conditions per place. [2023-01-28 05:24:45,951 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 76 selfloop transitions, 30 changer transitions 24/130 dead transitions. [2023-01-28 05:24:45,951 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 130 transitions, 659 flow [2023-01-28 05:24:45,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-01-28 05:24:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-01-28 05:24:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1346 transitions. [2023-01-28 05:24:45,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31625939849624063 [2023-01-28 05:24:45,954 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1346 transitions. [2023-01-28 05:24:45,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1346 transitions. [2023-01-28 05:24:45,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:45,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1346 transitions. [2023-01-28 05:24:45,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 70.84210526315789) internal successors, (1346), 19 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:45,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 224.0) internal successors, (4480), 20 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:45,961 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 224.0) internal successors, (4480), 20 states have internal predecessors, (4480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:45,962 INFO L175 Difference]: Start difference. First operand has 24 places, 18 transitions, 68 flow. Second operand 19 states and 1346 transitions. [2023-01-28 05:24:45,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 130 transitions, 659 flow [2023-01-28 05:24:45,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 130 transitions, 645 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-01-28 05:24:45,964 INFO L231 Difference]: Finished difference. Result has 45 places, 50 transitions, 300 flow [2023-01-28 05:24:45,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=300, PETRI_PLACES=45, PETRI_TRANSITIONS=50} [2023-01-28 05:24:45,965 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 26 predicate places. [2023-01-28 05:24:45,965 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 50 transitions, 300 flow [2023-01-28 05:24:45,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 66.05882352941177) internal successors, (1123), 17 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:45,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:45,965 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:45,971 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 05:24:46,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:46,171 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:46,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:46,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1849941358, now seen corresponding path program 2 times [2023-01-28 05:24:46,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:46,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125316801] [2023-01-28 05:24:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:46,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:46,783 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 05:24:46,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:46,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125316801] [2023-01-28 05:24:46,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125316801] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:24:46,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950153996] [2023-01-28 05:24:46,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:24:46,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:46,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:24:46,785 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 05:24:46,787 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 05:24:46,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:24:46,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:24:46,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 20 conjunts are in the unsatisfiable core [2023-01-28 05:24:46,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:24:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:24:46,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:24:46,924 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 05:24:46,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-01-28 05:24:46,936 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 05:24:46,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950153996] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:24:46,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:24:46,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 9 [2023-01-28 05:24:46,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146296526] [2023-01-28 05:24:46,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:24:46,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-01-28 05:24:46,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:46,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-01-28 05:24:46,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-01-28 05:24:46,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 05:24:46,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 50 transitions, 300 flow. Second operand has 11 states, 11 states have (on average 73.72727272727273) internal successors, (811), 11 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:46,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:46,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 05:24:46,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:47,185 INFO L130 PetriNetUnfolder]: 373/712 cut-off events. [2023-01-28 05:24:47,185 INFO L131 PetriNetUnfolder]: For 1243/1243 co-relation queries the response was YES. [2023-01-28 05:24:47,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 712 events. 373/712 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3550 event pairs, 72 based on Foata normal form. 1/710 useless extension candidates. Maximal degree in co-relation 2123. Up to 250 conditions per place. [2023-01-28 05:24:47,189 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 55 selfloop transitions, 33 changer transitions 16/104 dead transitions. [2023-01-28 05:24:47,189 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 104 transitions, 749 flow [2023-01-28 05:24:47,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-01-28 05:24:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-01-28 05:24:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 777 transitions. [2023-01-28 05:24:47,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.346875 [2023-01-28 05:24:47,191 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 777 transitions. [2023-01-28 05:24:47,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 777 transitions. [2023-01-28 05:24:47,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:47,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 777 transitions. [2023-01-28 05:24:47,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 77.7) internal successors, (777), 10 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:47,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:47,195 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 224.0) internal successors, (2464), 11 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:47,195 INFO L175 Difference]: Start difference. First operand has 45 places, 50 transitions, 300 flow. Second operand 10 states and 777 transitions. [2023-01-28 05:24:47,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 104 transitions, 749 flow [2023-01-28 05:24:47,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 104 transitions, 695 flow, removed 25 selfloop flow, removed 2 redundant places. [2023-01-28 05:24:47,201 INFO L231 Difference]: Finished difference. Result has 54 places, 62 transitions, 444 flow [2023-01-28 05:24:47,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=444, PETRI_PLACES=54, PETRI_TRANSITIONS=62} [2023-01-28 05:24:47,201 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 35 predicate places. [2023-01-28 05:24:47,201 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 62 transitions, 444 flow [2023-01-28 05:24:47,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 73.72727272727273) internal successors, (811), 11 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:47,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:47,202 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:47,217 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 05:24:47,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:47,407 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:47,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:47,407 INFO L85 PathProgramCache]: Analyzing trace with hash -169763452, now seen corresponding path program 3 times [2023-01-28 05:24:47,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:47,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656507062] [2023-01-28 05:24:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:47,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:47,860 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 05:24:47,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:47,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656507062] [2023-01-28 05:24:47,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656507062] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:24:47,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822448262] [2023-01-28 05:24:47,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:24:47,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:47,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:24:47,862 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 05:24:47,865 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 05:24:47,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 05:24:47,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:24:47,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2023-01-28 05:24:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:24:48,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:24:48,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 05:24:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:24:48,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:24:48,102 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:24:48,102 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 42 treesize of output 34 [2023-01-28 05:24:48,109 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 9 treesize of output 3 [2023-01-28 05:24:48,154 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 05:24:48,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822448262] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:24:48,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:24:48,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 15 [2023-01-28 05:24:48,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960920306] [2023-01-28 05:24:48,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:24:48,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-01-28 05:24:48,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:48,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-01-28 05:24:48,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=222, Unknown=4, NotChecked=0, Total=272 [2023-01-28 05:24:48,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 05:24:48,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 62 transitions, 444 flow. Second operand has 17 states, 17 states have (on average 69.11764705882354) internal successors, (1175), 17 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:48,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:48,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 05:24:48,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:48,547 INFO L130 PetriNetUnfolder]: 429/819 cut-off events. [2023-01-28 05:24:48,547 INFO L131 PetriNetUnfolder]: For 2073/2073 co-relation queries the response was YES. [2023-01-28 05:24:48,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2915 conditions, 819 events. 429/819 cut-off events. For 2073/2073 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4239 event pairs, 106 based on Foata normal form. 1/818 useless extension candidates. Maximal degree in co-relation 2536. Up to 246 conditions per place. [2023-01-28 05:24:48,551 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 62 selfloop transitions, 30 changer transitions 21/113 dead transitions. [2023-01-28 05:24:48,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 113 transitions, 868 flow [2023-01-28 05:24:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 05:24:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 05:24:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 813 transitions. [2023-01-28 05:24:48,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3299512987012987 [2023-01-28 05:24:48,553 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 813 transitions. [2023-01-28 05:24:48,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 813 transitions. [2023-01-28 05:24:48,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:48,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 813 transitions. [2023-01-28 05:24:48,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 73.9090909090909) internal successors, (813), 11 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:48,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:48,557 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 224.0) internal successors, (2688), 12 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:48,557 INFO L175 Difference]: Start difference. First operand has 54 places, 62 transitions, 444 flow. Second operand 11 states and 813 transitions. [2023-01-28 05:24:48,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 113 transitions, 868 flow [2023-01-28 05:24:48,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 113 transitions, 843 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-01-28 05:24:48,564 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 544 flow [2023-01-28 05:24:48,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=544, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2023-01-28 05:24:48,564 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 42 predicate places. [2023-01-28 05:24:48,565 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 544 flow [2023-01-28 05:24:48,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 69.11764705882354) internal successors, (1175), 17 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:48,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:48,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:48,572 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 05:24:48,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:48,770 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:48,771 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:48,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1698945970, now seen corresponding path program 4 times [2023-01-28 05:24:48,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:48,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108412905] [2023-01-28 05:24:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:48,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:24:48,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:48,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108412905] [2023-01-28 05:24:48,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108412905] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:24:48,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224225968] [2023-01-28 05:24:48,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:24:48,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:48,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:24:48,865 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 05:24:48,872 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 05:24:48,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:24:48,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:24:48,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 05:24:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:24:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:24:48,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:24:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:24:49,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224225968] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:24:49,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:24:49,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2023-01-28 05:24:49,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025140916] [2023-01-28 05:24:49,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:24:49,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-01-28 05:24:49,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:49,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-01-28 05:24:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-01-28 05:24:49,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2023-01-28 05:24:49,006 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 544 flow. Second operand has 8 states, 8 states have (on average 102.625) internal successors, (821), 8 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:49,006 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:49,006 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2023-01-28 05:24:49,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:49,130 INFO L130 PetriNetUnfolder]: 639/1236 cut-off events. [2023-01-28 05:24:49,130 INFO L131 PetriNetUnfolder]: For 4701/4701 co-relation queries the response was YES. [2023-01-28 05:24:49,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4606 conditions, 1236 events. 639/1236 cut-off events. For 4701/4701 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7100 event pairs, 183 based on Foata normal form. 42/1277 useless extension candidates. Maximal degree in co-relation 3793. Up to 548 conditions per place. [2023-01-28 05:24:49,134 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 62 selfloop transitions, 25 changer transitions 5/92 dead transitions. [2023-01-28 05:24:49,135 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 92 transitions, 936 flow [2023-01-28 05:24:49,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:24:49,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 05:24:49,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 429 transitions. [2023-01-28 05:24:49,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47879464285714285 [2023-01-28 05:24:49,136 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 429 transitions. [2023-01-28 05:24:49,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 429 transitions. [2023-01-28 05:24:49,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:49,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 429 transitions. [2023-01-28 05:24:49,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:49,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:49,138 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 224.0) internal successors, (1120), 5 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:49,138 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 544 flow. Second operand 4 states and 429 transitions. [2023-01-28 05:24:49,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 92 transitions, 936 flow [2023-01-28 05:24:49,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 92 transitions, 858 flow, removed 13 selfloop flow, removed 10 redundant places. [2023-01-28 05:24:49,150 INFO L231 Difference]: Finished difference. Result has 54 places, 70 transitions, 692 flow [2023-01-28 05:24:49,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=452, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=692, PETRI_PLACES=54, PETRI_TRANSITIONS=70} [2023-01-28 05:24:49,151 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 35 predicate places. [2023-01-28 05:24:49,151 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 70 transitions, 692 flow [2023-01-28 05:24:49,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 102.625) internal successors, (821), 8 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:49,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:49,151 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:49,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-01-28 05:24:49,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:49,356 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:49,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:49,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1715728177, now seen corresponding path program 5 times [2023-01-28 05:24:49,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:49,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466843223] [2023-01-28 05:24:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:49,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:24:49,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:49,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466843223] [2023-01-28 05:24:49,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466843223] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:24:49,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288108160] [2023-01-28 05:24:49,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:24:49,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:49,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:24:49,456 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 05:24:49,482 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 05:24:49,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:24:49,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:24:49,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-01-28 05:24:49,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:24:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:24:49,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:24:49,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:24:49,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288108160] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:24:49,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:24:49,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-01-28 05:24:49,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294520586] [2023-01-28 05:24:49,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:24:49,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 05:24:49,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:49,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 05:24:49,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-01-28 05:24:49,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 224 [2023-01-28 05:24:49,624 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 70 transitions, 692 flow. Second operand has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:49,624 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:49,624 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 224 [2023-01-28 05:24:49,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:49,770 INFO L130 PetriNetUnfolder]: 446/885 cut-off events. [2023-01-28 05:24:49,770 INFO L131 PetriNetUnfolder]: For 3907/3907 co-relation queries the response was YES. [2023-01-28 05:24:49,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3501 conditions, 885 events. 446/885 cut-off events. For 3907/3907 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4669 event pairs, 297 based on Foata normal form. 19/903 useless extension candidates. Maximal degree in co-relation 2175. Up to 754 conditions per place. [2023-01-28 05:24:49,774 INFO L137 encePairwiseOnDemand]: 220/224 looper letters, 49 selfloop transitions, 3 changer transitions 21/73 dead transitions. [2023-01-28 05:24:49,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 73 transitions, 741 flow [2023-01-28 05:24:49,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 05:24:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 05:24:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 554 transitions. [2023-01-28 05:24:49,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41220238095238093 [2023-01-28 05:24:49,775 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 554 transitions. [2023-01-28 05:24:49,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 554 transitions. [2023-01-28 05:24:49,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:49,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 554 transitions. [2023-01-28 05:24:49,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 92.33333333333333) internal successors, (554), 6 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:49,777 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:49,778 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 224.0) internal successors, (1568), 7 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:49,778 INFO L175 Difference]: Start difference. First operand has 54 places, 70 transitions, 692 flow. Second operand 6 states and 554 transitions. [2023-01-28 05:24:49,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 73 transitions, 741 flow [2023-01-28 05:24:49,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 725 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-01-28 05:24:49,785 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 484 flow [2023-01-28 05:24:49,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=484, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2023-01-28 05:24:49,786 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 38 predicate places. [2023-01-28 05:24:49,786 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 484 flow [2023-01-28 05:24:49,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 88.16666666666667) internal successors, (1058), 12 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:49,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:49,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:49,793 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 05:24:49,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:49,991 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:49,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:49,991 INFO L85 PathProgramCache]: Analyzing trace with hash -876655132, now seen corresponding path program 6 times [2023-01-28 05:24:49,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:49,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766438992] [2023-01-28 05:24:49,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:49,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:50,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:50,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:50,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766438992] [2023-01-28 05:24:50,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766438992] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:24:50,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929649824] [2023-01-28 05:24:50,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:24:50,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:50,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:24:50,277 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 05:24:50,279 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 05:24:50,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 05:24:50,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:24:50,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 24 conjunts are in the unsatisfiable core [2023-01-28 05:24:50,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:24:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:24:50,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:24:50,492 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 05:24:50,493 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 25 treesize of output 13 [2023-01-28 05:24:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:24:50,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929649824] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:24:50,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:24:50,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 13 [2023-01-28 05:24:50,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267030536] [2023-01-28 05:24:50,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:24:50,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-01-28 05:24:50,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-01-28 05:24:50,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-01-28 05:24:50,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 05:24:50,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 484 flow. Second operand has 15 states, 15 states have (on average 73.26666666666667) internal successors, (1099), 15 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:50,505 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:50,505 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 05:24:50,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:51,185 INFO L130 PetriNetUnfolder]: 748/1414 cut-off events. [2023-01-28 05:24:51,185 INFO L131 PetriNetUnfolder]: For 4545/4545 co-relation queries the response was YES. [2023-01-28 05:24:51,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5457 conditions, 1414 events. 748/1414 cut-off events. For 4545/4545 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 8294 event pairs, 74 based on Foata normal form. 9/1422 useless extension candidates. Maximal degree in co-relation 5429. Up to 412 conditions per place. [2023-01-28 05:24:51,191 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 102 selfloop transitions, 63 changer transitions 79/244 dead transitions. [2023-01-28 05:24:51,191 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 244 transitions, 1867 flow [2023-01-28 05:24:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-01-28 05:24:51,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-01-28 05:24:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2212 transitions. [2023-01-28 05:24:51,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35267857142857145 [2023-01-28 05:24:51,195 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2212 transitions. [2023-01-28 05:24:51,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2212 transitions. [2023-01-28 05:24:51,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:51,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2212 transitions. [2023-01-28 05:24:51,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 79.0) internal successors, (2212), 28 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:51,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 224.0) internal successors, (6496), 29 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:51,205 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 224.0) internal successors, (6496), 29 states have internal predecessors, (6496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:51,205 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 484 flow. Second operand 28 states and 2212 transitions. [2023-01-28 05:24:51,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 244 transitions, 1867 flow [2023-01-28 05:24:51,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 244 transitions, 1801 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-01-28 05:24:51,212 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 1047 flow [2023-01-28 05:24:51,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1047, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2023-01-28 05:24:51,213 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 65 predicate places. [2023-01-28 05:24:51,213 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 1047 flow [2023-01-28 05:24:51,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 73.26666666666667) internal successors, (1099), 15 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:51,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:51,214 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:51,223 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 05:24:51,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:51,420 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:51,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:51,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1519550220, now seen corresponding path program 7 times [2023-01-28 05:24:51,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:51,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355008343] [2023-01-28 05:24:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:51,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:51,775 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:51,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:51,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355008343] [2023-01-28 05:24:51,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355008343] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:24:51,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147460181] [2023-01-28 05:24:51,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:24:51,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:51,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:24:51,777 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 05:24:51,779 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 05:24:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:51,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 05:24:51,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:24:52,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:24:52,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 05:24:52,101 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 05:24:52,101 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 23 treesize of output 10 [2023-01-28 05:24:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:52,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:24:52,175 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:24:52,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-28 05:24:52,183 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 10 treesize of output 3 [2023-01-28 05:24:52,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:52,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147460181] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:24:52,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:24:52,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-01-28 05:24:52,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812816779] [2023-01-28 05:24:52,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:24:52,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-01-28 05:24:52,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:52,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-01-28 05:24:52,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=603, Unknown=6, NotChecked=0, Total=702 [2023-01-28 05:24:52,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 05:24:52,425 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 1047 flow. Second operand has 27 states, 27 states have (on average 68.77777777777777) internal successors, (1857), 27 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:52,425 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:52,425 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 05:24:52,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:54,606 INFO L130 PetriNetUnfolder]: 1180/2203 cut-off events. [2023-01-28 05:24:54,606 INFO L131 PetriNetUnfolder]: For 11127/11127 co-relation queries the response was YES. [2023-01-28 05:24:54,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9239 conditions, 2203 events. 1180/2203 cut-off events. For 11127/11127 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13595 event pairs, 186 based on Foata normal form. 6/2208 useless extension candidates. Maximal degree in co-relation 8450. Up to 628 conditions per place. [2023-01-28 05:24:54,616 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 149 selfloop transitions, 74 changer transitions 32/255 dead transitions. [2023-01-28 05:24:54,616 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 255 transitions, 2697 flow [2023-01-28 05:24:54,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 05:24:54,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 05:24:54,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1797 transitions. [2023-01-28 05:24:54,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33426339285714285 [2023-01-28 05:24:54,621 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1797 transitions. [2023-01-28 05:24:54,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1797 transitions. [2023-01-28 05:24:54,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:54,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1797 transitions. [2023-01-28 05:24:54,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 74.875) internal successors, (1797), 24 states have internal predecessors, (1797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:54,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:54,631 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:54,631 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 1047 flow. Second operand 24 states and 1797 transitions. [2023-01-28 05:24:54,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 255 transitions, 2697 flow [2023-01-28 05:24:54,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 255 transitions, 2302 flow, removed 135 selfloop flow, removed 9 redundant places. [2023-01-28 05:24:54,647 INFO L231 Difference]: Finished difference. Result has 104 places, 130 transitions, 1538 flow [2023-01-28 05:24:54,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1538, PETRI_PLACES=104, PETRI_TRANSITIONS=130} [2023-01-28 05:24:54,647 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 85 predicate places. [2023-01-28 05:24:54,648 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 130 transitions, 1538 flow [2023-01-28 05:24:54,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 68.77777777777777) internal successors, (1857), 27 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:54,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:54,648 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:54,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-01-28 05:24:54,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:54,853 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:54,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:54,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2064568971, now seen corresponding path program 8 times [2023-01-28 05:24:54,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:54,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438495904] [2023-01-28 05:24:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:54,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:24:54,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:54,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438495904] [2023-01-28 05:24:54,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438495904] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:24:54,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373685366] [2023-01-28 05:24:54,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:24:54,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:54,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:24:54,942 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 05:24:54,980 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 05:24:55,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:24:55,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:24:55,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2023-01-28 05:24:55,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:24:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:24:55,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:24:55,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:24:55,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373685366] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:24:55,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:24:55,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 11 [2023-01-28 05:24:55,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566442575] [2023-01-28 05:24:55,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:24:55,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-01-28 05:24:55,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:55,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-01-28 05:24:55,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-01-28 05:24:55,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 224 [2023-01-28 05:24:55,139 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 130 transitions, 1538 flow. Second operand has 12 states, 12 states have (on average 98.5) internal successors, (1182), 12 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:55,139 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:55,139 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 224 [2023-01-28 05:24:55,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:24:55,508 INFO L130 PetriNetUnfolder]: 2100/3909 cut-off events. [2023-01-28 05:24:55,508 INFO L131 PetriNetUnfolder]: For 17692/17692 co-relation queries the response was YES. [2023-01-28 05:24:55,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15901 conditions, 3909 events. 2100/3909 cut-off events. For 17692/17692 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27273 event pairs, 507 based on Foata normal form. 30/3938 useless extension candidates. Maximal degree in co-relation 15203. Up to 1736 conditions per place. [2023-01-28 05:24:55,524 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 125 selfloop transitions, 105 changer transitions 0/230 dead transitions. [2023-01-28 05:24:55,524 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 230 transitions, 3169 flow [2023-01-28 05:24:55,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-28 05:24:55,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-28 05:24:55,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 523 transitions. [2023-01-28 05:24:55,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669642857142857 [2023-01-28 05:24:55,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 523 transitions. [2023-01-28 05:24:55,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 523 transitions. [2023-01-28 05:24:55,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:24:55,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 523 transitions. [2023-01-28 05:24:55,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.6) internal successors, (523), 5 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:55,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:55,530 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 224.0) internal successors, (1344), 6 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:55,530 INFO L175 Difference]: Start difference. First operand has 104 places, 130 transitions, 1538 flow. Second operand 5 states and 523 transitions. [2023-01-28 05:24:55,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 230 transitions, 3169 flow [2023-01-28 05:24:55,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 230 transitions, 2881 flow, removed 139 selfloop flow, removed 4 redundant places. [2023-01-28 05:24:55,567 INFO L231 Difference]: Finished difference. Result has 107 places, 203 transitions, 2736 flow [2023-01-28 05:24:55,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2736, PETRI_PLACES=107, PETRI_TRANSITIONS=203} [2023-01-28 05:24:55,568 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 88 predicate places. [2023-01-28 05:24:55,568 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 203 transitions, 2736 flow [2023-01-28 05:24:55,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 98.5) internal successors, (1182), 12 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:55,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:24:55,568 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:24:55,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 05:24:55,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-01-28 05:24:55,773 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:24:55,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:24:55,774 INFO L85 PathProgramCache]: Analyzing trace with hash -672308245, now seen corresponding path program 9 times [2023-01-28 05:24:55,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:24:55,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015137070] [2023-01-28 05:24:55,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:24:55,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:24:55,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:24:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:24:56,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:24:56,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015137070] [2023-01-28 05:24:56,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015137070] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:24:56,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685557152] [2023-01-28 05:24:56,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:24:56,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:24:56,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:24:56,416 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:24:56,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 05:24:56,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 05:24:56,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:24:56,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 26 conjunts are in the unsatisfiable core [2023-01-28 05:24:56,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:24:56,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:24:56,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-01-28 05:24:56,745 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 05:24:56,745 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 23 treesize of output 10 [2023-01-28 05:24:56,754 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:24:56,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:24:56,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:24:56,906 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 42 treesize of output 34 [2023-01-28 05:24:56,910 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 13 treesize of output 7 [2023-01-28 05:24:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:24:57,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685557152] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:24:57,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:24:57,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2023-01-28 05:24:57,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56932405] [2023-01-28 05:24:57,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:24:57,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 05:24:57,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:24:57,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 05:24:57,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-01-28 05:24:57,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 05:24:57,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 203 transitions, 2736 flow. Second operand has 24 states, 24 states have (on average 68.625) internal successors, (1647), 24 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:24:57,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:24:57,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 05:24:57,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:25:01,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:03,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:05,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:07,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:09,847 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:11,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:13,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:15,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:25:17,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:25:24,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:25:26,144 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:28,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:25:30,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:32,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:34,287 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:40,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:42,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:44,991 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-01-28 05:25:45,268 INFO L130 PetriNetUnfolder]: 2850/5261 cut-off events. [2023-01-28 05:25:45,268 INFO L131 PetriNetUnfolder]: For 26967/26967 co-relation queries the response was YES. [2023-01-28 05:25:45,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21874 conditions, 5261 events. 2850/5261 cut-off events. For 26967/26967 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 38459 event pairs, 297 based on Foata normal form. 22/5282 useless extension candidates. Maximal degree in co-relation 21598. Up to 1497 conditions per place. [2023-01-28 05:25:45,290 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 21 selfloop transitions, 11 changer transitions 364/396 dead transitions. [2023-01-28 05:25:45,290 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 396 transitions, 4833 flow [2023-01-28 05:25:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 05:25:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 05:25:45,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1796 transitions. [2023-01-28 05:25:45,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33407738095238093 [2023-01-28 05:25:45,293 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1796 transitions. [2023-01-28 05:25:45,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1796 transitions. [2023-01-28 05:25:45,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:25:45,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1796 transitions. [2023-01-28 05:25:45,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 74.83333333333333) internal successors, (1796), 24 states have internal predecessors, (1796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:45,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:45,375 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 224.0) internal successors, (5600), 25 states have internal predecessors, (5600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:45,375 INFO L175 Difference]: Start difference. First operand has 107 places, 203 transitions, 2736 flow. Second operand 24 states and 1796 transitions. [2023-01-28 05:25:45,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 396 transitions, 4833 flow [2023-01-28 05:25:45,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 396 transitions, 4649 flow, removed 92 selfloop flow, removed 0 redundant places. [2023-01-28 05:25:45,434 INFO L231 Difference]: Finished difference. Result has 137 places, 26 transitions, 280 flow [2023-01-28 05:25:45,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2602, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=280, PETRI_PLACES=137, PETRI_TRANSITIONS=26} [2023-01-28 05:25:45,434 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 118 predicate places. [2023-01-28 05:25:45,434 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 26 transitions, 280 flow [2023-01-28 05:25:45,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 68.625) internal successors, (1647), 24 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:45,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:25:45,435 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:25:45,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 05:25:45,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:25:45,640 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:25:45,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:25:45,641 INFO L85 PathProgramCache]: Analyzing trace with hash -831556684, now seen corresponding path program 10 times [2023-01-28 05:25:45,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:25:45,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063034790] [2023-01-28 05:25:45,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:25:45,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:25:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:25:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:25:46,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:25:46,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063034790] [2023-01-28 05:25:46,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063034790] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:25:46,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363637639] [2023-01-28 05:25:46,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:25:46,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:25:46,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:25:46,395 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:25:46,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 05:25:46,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:25:46,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:25:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 05:25:46,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:25:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:25:46,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 05:25:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 05:25:46,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:25:46,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:25:46,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-28 05:25:46,885 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 10 treesize of output 3 [2023-01-28 05:25:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-01-28 05:25:47,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363637639] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:25:47,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:25:47,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 7] total 27 [2023-01-28 05:25:47,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425160699] [2023-01-28 05:25:47,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:25:47,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-01-28 05:25:47,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:25:47,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-01-28 05:25:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=730, Unknown=3, NotChecked=0, Total=812 [2023-01-28 05:25:47,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 05:25:47,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 26 transitions, 280 flow. Second operand has 29 states, 29 states have (on average 68.72413793103448) internal successors, (1993), 29 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:47,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:25:47,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 05:25:47,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:25:48,381 INFO L130 PetriNetUnfolder]: 363/689 cut-off events. [2023-01-28 05:25:48,381 INFO L131 PetriNetUnfolder]: For 7813/7813 co-relation queries the response was YES. [2023-01-28 05:25:48,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3400 conditions, 689 events. 363/689 cut-off events. For 7813/7813 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2982 event pairs, 22 based on Foata normal form. 8/695 useless extension candidates. Maximal degree in co-relation 3359. Up to 203 conditions per place. [2023-01-28 05:25:48,386 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 120 selfloop transitions, 44 changer transitions 28/192 dead transitions. [2023-01-28 05:25:48,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 192 transitions, 1995 flow [2023-01-28 05:25:48,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 05:25:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 05:25:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2272 transitions. [2023-01-28 05:25:48,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3271889400921659 [2023-01-28 05:25:48,390 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2272 transitions. [2023-01-28 05:25:48,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2272 transitions. [2023-01-28 05:25:48,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:25:48,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2272 transitions. [2023-01-28 05:25:48,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 73.29032258064517) internal successors, (2272), 31 states have internal predecessors, (2272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:48,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:48,398 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 224.0) internal successors, (7168), 32 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:48,398 INFO L175 Difference]: Start difference. First operand has 137 places, 26 transitions, 280 flow. Second operand 31 states and 2272 transitions. [2023-01-28 05:25:48,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 192 transitions, 1995 flow [2023-01-28 05:25:48,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 192 transitions, 1267 flow, removed 313 selfloop flow, removed 45 redundant places. [2023-01-28 05:25:48,406 INFO L231 Difference]: Finished difference. Result has 77 places, 66 transitions, 696 flow [2023-01-28 05:25:48,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=696, PETRI_PLACES=77, PETRI_TRANSITIONS=66} [2023-01-28 05:25:48,406 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 58 predicate places. [2023-01-28 05:25:48,407 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 66 transitions, 696 flow [2023-01-28 05:25:48,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 68.72413793103448) internal successors, (1993), 29 states have internal predecessors, (1993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:48,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:25:48,407 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:25:48,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 05:25:48,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 05:25:48,612 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:25:48,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:25:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash -8903775, now seen corresponding path program 11 times [2023-01-28 05:25:48,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:25:48,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285750903] [2023-01-28 05:25:48,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:25:48,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:25:48,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:25:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:25:49,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:25:49,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285750903] [2023-01-28 05:25:49,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285750903] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:25:49,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042960896] [2023-01-28 05:25:49,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:25:49,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:25:49,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:25:49,145 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:25:49,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 05:25:49,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:25:49,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:25:49,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 44 conjunts are in the unsatisfiable core [2023-01-28 05:25:49,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:25:49,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:25:49,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 05:25:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:25:49,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:25:49,800 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_430 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_430) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2023-01-28 05:25:49,858 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:25:49,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-28 05:25:49,864 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 10 treesize of output 3 [2023-01-28 05:25:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-01-28 05:25:50,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042960896] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:25:50,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:25:50,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-01-28 05:25:50,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807324692] [2023-01-28 05:25:50,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:25:50,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 05:25:50,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:25:50,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 05:25:50,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1423, Unknown=1, NotChecked=78, Total=1722 [2023-01-28 05:25:50,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 05:25:50,280 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 66 transitions, 696 flow. Second operand has 42 states, 42 states have (on average 68.5) internal successors, (2877), 42 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:25:50,280 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:25:50,280 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 05:25:50,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:25:53,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:26:34,061 INFO L130 PetriNetUnfolder]: 1100/2034 cut-off events. [2023-01-28 05:26:34,061 INFO L131 PetriNetUnfolder]: For 9657/9657 co-relation queries the response was YES. [2023-01-28 05:26:34,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8403 conditions, 2034 events. 1100/2034 cut-off events. For 9657/9657 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 11559 event pairs, 33 based on Foata normal form. 13/2040 useless extension candidates. Maximal degree in co-relation 8380. Up to 639 conditions per place. [2023-01-28 05:26:34,069 INFO L137 encePairwiseOnDemand]: 213/224 looper letters, 314 selfloop transitions, 179 changer transitions 103/596 dead transitions. [2023-01-28 05:26:34,069 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 596 transitions, 4714 flow [2023-01-28 05:26:34,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-01-28 05:26:34,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-01-28 05:26:34,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 6218 transitions. [2023-01-28 05:26:34,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3304634353741497 [2023-01-28 05:26:34,076 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 6218 transitions. [2023-01-28 05:26:34,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 6218 transitions. [2023-01-28 05:26:34,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:26:34,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 6218 transitions. [2023-01-28 05:26:34,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 74.02380952380952) internal successors, (6218), 84 states have internal predecessors, (6218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:34,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 224.0) internal successors, (19040), 85 states have internal predecessors, (19040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:34,094 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 224.0) internal successors, (19040), 85 states have internal predecessors, (19040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:34,094 INFO L175 Difference]: Start difference. First operand has 77 places, 66 transitions, 696 flow. Second operand 84 states and 6218 transitions. [2023-01-28 05:26:34,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 596 transitions, 4714 flow [2023-01-28 05:26:34,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 596 transitions, 3593 flow, removed 538 selfloop flow, removed 11 redundant places. [2023-01-28 05:26:34,107 INFO L231 Difference]: Finished difference. Result has 188 places, 212 transitions, 1904 flow [2023-01-28 05:26:34,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=1904, PETRI_PLACES=188, PETRI_TRANSITIONS=212} [2023-01-28 05:26:34,107 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 169 predicate places. [2023-01-28 05:26:34,108 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 212 transitions, 1904 flow [2023-01-28 05:26:34,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 68.5) internal successors, (2877), 42 states have internal predecessors, (2877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:34,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:26:34,108 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:26:34,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 05:26:34,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 05:26:34,313 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:26:34,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:26:34,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1692361028, now seen corresponding path program 12 times [2023-01-28 05:26:34,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:26:34,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720766569] [2023-01-28 05:26:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:26:34,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:26:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:26:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:34,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:26:34,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720766569] [2023-01-28 05:26:34,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720766569] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:26:34,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894100344] [2023-01-28 05:26:34,834 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:26:34,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:26:34,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:26:34,845 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:26:34,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 05:26:34,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:26:34,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:26:34,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 47 conjunts are in the unsatisfiable core [2023-01-28 05:26:34,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:26:35,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:26:35,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 05:26:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:35,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:26:35,572 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:26:35,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-28 05:26:35,576 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 10 treesize of output 3 [2023-01-28 05:26:35,975 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:35,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894100344] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:26:35,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:26:35,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 43 [2023-01-28 05:26:35,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722022499] [2023-01-28 05:26:35,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:26:35,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-01-28 05:26:35,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:26:35,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-01-28 05:26:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1753, Unknown=7, NotChecked=0, Total=1980 [2023-01-28 05:26:35,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 05:26:35,979 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 212 transitions, 1904 flow. Second operand has 45 states, 45 states have (on average 68.46666666666667) internal successors, (3081), 45 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:35,979 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:26:35,979 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 05:26:35,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:26:39,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:26:47,516 INFO L130 PetriNetUnfolder]: 2268/4220 cut-off events. [2023-01-28 05:26:47,516 INFO L131 PetriNetUnfolder]: For 137947/137947 co-relation queries the response was YES. [2023-01-28 05:26:47,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35475 conditions, 4220 events. 2268/4220 cut-off events. For 137947/137947 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 28028 event pairs, 124 based on Foata normal form. 18/4237 useless extension candidates. Maximal degree in co-relation 35416. Up to 1485 conditions per place. [2023-01-28 05:26:47,568 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 657 selfloop transitions, 270 changer transitions 207/1134 dead transitions. [2023-01-28 05:26:47,568 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 1134 transitions, 17660 flow [2023-01-28 05:26:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-01-28 05:26:47,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2023-01-28 05:26:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 9782 transitions. [2023-01-28 05:26:47,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33335605234460197 [2023-01-28 05:26:47,590 INFO L72 ComplementDD]: Start complementDD. Operand 131 states and 9782 transitions. [2023-01-28 05:26:47,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 131 states and 9782 transitions. [2023-01-28 05:26:47,606 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:26:47,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 131 states and 9782 transitions. [2023-01-28 05:26:47,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 132 states, 131 states have (on average 74.67175572519083) internal successors, (9782), 131 states have internal predecessors, (9782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:47,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 132 states, 132 states have (on average 224.0) internal successors, (29568), 132 states have internal predecessors, (29568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:47,657 INFO L81 ComplementDD]: Finished complementDD. Result has 132 states, 132 states have (on average 224.0) internal successors, (29568), 132 states have internal predecessors, (29568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:47,657 INFO L175 Difference]: Start difference. First operand has 188 places, 212 transitions, 1904 flow. Second operand 131 states and 9782 transitions. [2023-01-28 05:26:47,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 1134 transitions, 17660 flow [2023-01-28 05:26:47,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1134 transitions, 16977 flow, removed 204 selfloop flow, removed 21 redundant places. [2023-01-28 05:26:47,747 INFO L231 Difference]: Finished difference. Result has 317 places, 351 transitions, 3291 flow [2023-01-28 05:26:47,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1545, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=3291, PETRI_PLACES=317, PETRI_TRANSITIONS=351} [2023-01-28 05:26:47,749 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 298 predicate places. [2023-01-28 05:26:47,749 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 351 transitions, 3291 flow [2023-01-28 05:26:47,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 68.46666666666667) internal successors, (3081), 45 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:47,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:26:47,750 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:26:47,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-01-28 05:26:47,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 05:26:47,954 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:26:47,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:26:47,954 INFO L85 PathProgramCache]: Analyzing trace with hash 882668565, now seen corresponding path program 13 times [2023-01-28 05:26:47,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:26:47,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732683568] [2023-01-28 05:26:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:26:47,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:26:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:26:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-01-28 05:26:48,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:26:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732683568] [2023-01-28 05:26:48,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732683568] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:26:48,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665266315] [2023-01-28 05:26:48,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:26:48,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:26:48,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:26:48,070 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:26:48,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 05:26:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:26:48,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 05:26:48,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:26:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:26:48,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:26:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-01-28 05:26:48,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665266315] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:26:48,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:26:48,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 12] total 29 [2023-01-28 05:26:48,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437678438] [2023-01-28 05:26:48,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:26:48,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 05:26:48,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:26:48,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 05:26:48,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2023-01-28 05:26:48,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 224 [2023-01-28 05:26:48,659 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 351 transitions, 3291 flow. Second operand has 30 states, 30 states have (on average 86.06666666666666) internal successors, (2582), 30 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:48,659 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:26:48,659 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 224 [2023-01-28 05:26:48,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:26:49,308 INFO L130 PetriNetUnfolder]: 1192/2377 cut-off events. [2023-01-28 05:26:49,308 INFO L131 PetriNetUnfolder]: For 80253/80253 co-relation queries the response was YES. [2023-01-28 05:26:49,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21495 conditions, 2377 events. 1192/2377 cut-off events. For 80253/80253 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 15469 event pairs, 332 based on Foata normal form. 192/2569 useless extension candidates. Maximal degree in co-relation 21416. Up to 973 conditions per place. [2023-01-28 05:26:49,323 INFO L137 encePairwiseOnDemand]: 219/224 looper letters, 75 selfloop transitions, 53 changer transitions 139/267 dead transitions. [2023-01-28 05:26:49,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 267 transitions, 3817 flow [2023-01-28 05:26:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-01-28 05:26:49,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-01-28 05:26:49,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1883 transitions. [2023-01-28 05:26:49,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40029761904761907 [2023-01-28 05:26:49,324 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1883 transitions. [2023-01-28 05:26:49,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1883 transitions. [2023-01-28 05:26:49,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:26:49,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1883 transitions. [2023-01-28 05:26:49,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.66666666666667) internal successors, (1883), 21 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:49,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:49,335 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 224.0) internal successors, (4928), 22 states have internal predecessors, (4928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:49,335 INFO L175 Difference]: Start difference. First operand has 317 places, 351 transitions, 3291 flow. Second operand 21 states and 1883 transitions. [2023-01-28 05:26:49,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 267 transitions, 3817 flow [2023-01-28 05:26:49,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 267 transitions, 3145 flow, removed 261 selfloop flow, removed 62 redundant places. [2023-01-28 05:26:49,387 INFO L231 Difference]: Finished difference. Result has 199 places, 90 transitions, 984 flow [2023-01-28 05:26:49,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1165, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=984, PETRI_PLACES=199, PETRI_TRANSITIONS=90} [2023-01-28 05:26:49,387 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 180 predicate places. [2023-01-28 05:26:49,387 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 90 transitions, 984 flow [2023-01-28 05:26:49,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.06666666666666) internal successors, (2582), 30 states have internal predecessors, (2582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:49,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:26:49,388 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:26:49,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 05:26:49,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-01-28 05:26:49,592 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:26:49,593 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:26:49,593 INFO L85 PathProgramCache]: Analyzing trace with hash 399329853, now seen corresponding path program 14 times [2023-01-28 05:26:49,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:26:49,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124633541] [2023-01-28 05:26:49,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:26:49,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:26:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:26:50,153 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:50,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:26:50,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124633541] [2023-01-28 05:26:50,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124633541] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:26:50,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798098192] [2023-01-28 05:26:50,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:26:50,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:26:50,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:26:50,165 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:26:50,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 05:26:50,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:26:50,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:26:50,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 42 conjunts are in the unsatisfiable core [2023-01-28 05:26:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:26:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 05:26:50,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:26:50,558 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 05:26:50,558 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 25 treesize of output 13 [2023-01-28 05:26:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-01-28 05:26:50,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798098192] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:26:50,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:26:50,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 10] total 30 [2023-01-28 05:26:50,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287104266] [2023-01-28 05:26:50,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:26:50,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 05:26:50,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:26:50,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 05:26:50,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2023-01-28 05:26:50,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 05:26:50,581 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 90 transitions, 984 flow. Second operand has 32 states, 32 states have (on average 72.53125) internal successors, (2321), 32 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:50,581 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:26:50,581 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 05:26:50,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:26:52,641 INFO L130 PetriNetUnfolder]: 1315/2500 cut-off events. [2023-01-28 05:26:52,641 INFO L131 PetriNetUnfolder]: For 55017/55017 co-relation queries the response was YES. [2023-01-28 05:26:52,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19052 conditions, 2500 events. 1315/2500 cut-off events. For 55017/55017 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 14924 event pairs, 24 based on Foata normal form. 57/2557 useless extension candidates. Maximal degree in co-relation 18990. Up to 1033 conditions per place. [2023-01-28 05:26:52,678 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 246 selfloop transitions, 113 changer transitions 130/489 dead transitions. [2023-01-28 05:26:52,678 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 489 transitions, 7416 flow [2023-01-28 05:26:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-01-28 05:26:52,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-01-28 05:26:52,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 4772 transitions. [2023-01-28 05:26:52,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34923887587822017 [2023-01-28 05:26:52,683 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 4772 transitions. [2023-01-28 05:26:52,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 4772 transitions. [2023-01-28 05:26:52,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:26:52,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 4772 transitions. [2023-01-28 05:26:52,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 78.22950819672131) internal successors, (4772), 61 states have internal predecessors, (4772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:52,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 224.0) internal successors, (13888), 62 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:52,695 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 224.0) internal successors, (13888), 62 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:52,696 INFO L175 Difference]: Start difference. First operand has 199 places, 90 transitions, 984 flow. Second operand 61 states and 4772 transitions. [2023-01-28 05:26:52,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 489 transitions, 7416 flow [2023-01-28 05:26:52,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 489 transitions, 4237 flow, removed 1558 selfloop flow, removed 42 redundant places. [2023-01-28 05:26:52,730 INFO L231 Difference]: Finished difference. Result has 155 places, 147 transitions, 1848 flow [2023-01-28 05:26:52,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=804, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=1848, PETRI_PLACES=155, PETRI_TRANSITIONS=147} [2023-01-28 05:26:52,730 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 136 predicate places. [2023-01-28 05:26:52,731 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 147 transitions, 1848 flow [2023-01-28 05:26:52,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 72.53125) internal successors, (2321), 32 states have internal predecessors, (2321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:52,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:26:52,731 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:26:52,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-01-28 05:26:52,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:26:52,937 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:26:52,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:26:52,937 INFO L85 PathProgramCache]: Analyzing trace with hash 815982503, now seen corresponding path program 15 times [2023-01-28 05:26:52,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:26:52,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621332483] [2023-01-28 05:26:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:26:52,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:26:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:26:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:53,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:26:53,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621332483] [2023-01-28 05:26:53,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621332483] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:26:53,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537102787] [2023-01-28 05:26:53,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:26:53,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:26:53,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:26:53,653 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:26:53,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 05:26:54,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 05:26:54,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:26:54,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 43 conjunts are in the unsatisfiable core [2023-01-28 05:26:54,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:26:54,731 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:26:54,733 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:26:54,733 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 19 treesize of output 10 [2023-01-28 05:26:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:54,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:26:54,873 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 05:26:54,873 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 25 treesize of output 13 [2023-01-28 05:26:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:55,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537102787] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:26:55,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:26:55,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 50 [2023-01-28 05:26:55,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039461047] [2023-01-28 05:26:55,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:26:55,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-01-28 05:26:55,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:26:55,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-01-28 05:26:55,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=2355, Unknown=0, NotChecked=0, Total=2652 [2023-01-28 05:26:55,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 05:26:55,479 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 147 transitions, 1848 flow. Second operand has 52 states, 52 states have (on average 72.4423076923077) internal successors, (3767), 52 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:55,479 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:26:55,479 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 05:26:55,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:26:57,298 INFO L130 PetriNetUnfolder]: 1270/2418 cut-off events. [2023-01-28 05:26:57,298 INFO L131 PetriNetUnfolder]: For 10791/10791 co-relation queries the response was YES. [2023-01-28 05:26:57,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11911 conditions, 2418 events. 1270/2418 cut-off events. For 10791/10791 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 14444 event pairs, 403 based on Foata normal form. 1/2419 useless extension candidates. Maximal degree in co-relation 11863. Up to 1909 conditions per place. [2023-01-28 05:26:57,326 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 180 selfloop transitions, 30 changer transitions 27/237 dead transitions. [2023-01-28 05:26:57,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 237 transitions, 2814 flow [2023-01-28 05:26:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 05:26:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 05:26:57,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1972 transitions. [2023-01-28 05:26:57,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3385989010989011 [2023-01-28 05:26:57,339 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1972 transitions. [2023-01-28 05:26:57,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1972 transitions. [2023-01-28 05:26:57,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:26:57,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1972 transitions. [2023-01-28 05:26:57,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 75.84615384615384) internal successors, (1972), 26 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:57,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 224.0) internal successors, (6048), 27 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:57,344 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 224.0) internal successors, (6048), 27 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:57,344 INFO L175 Difference]: Start difference. First operand has 155 places, 147 transitions, 1848 flow. Second operand 26 states and 1972 transitions. [2023-01-28 05:26:57,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 237 transitions, 2814 flow [2023-01-28 05:26:57,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 237 transitions, 2393 flow, removed 130 selfloop flow, removed 15 redundant places. [2023-01-28 05:26:57,375 INFO L231 Difference]: Finished difference. Result has 158 places, 155 transitions, 1701 flow [2023-01-28 05:26:57,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1508, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1701, PETRI_PLACES=158, PETRI_TRANSITIONS=155} [2023-01-28 05:26:57,375 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 139 predicate places. [2023-01-28 05:26:57,375 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 155 transitions, 1701 flow [2023-01-28 05:26:57,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 72.4423076923077) internal successors, (3767), 52 states have internal predecessors, (3767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:57,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:26:57,376 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:26:57,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-01-28 05:26:57,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 05:26:57,587 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:26:57,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:26:57,587 INFO L85 PathProgramCache]: Analyzing trace with hash -654654409, now seen corresponding path program 16 times [2023-01-28 05:26:57,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:26:57,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800072799] [2023-01-28 05:26:57,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:26:57,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:26:57,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:26:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:58,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:26:58,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800072799] [2023-01-28 05:26:58,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800072799] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:26:58,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689909737] [2023-01-28 05:26:58,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:26:58,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:26:58,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:26:58,255 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:26:58,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 05:26:58,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:26:58,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:26:58,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 52 conjunts are in the unsatisfiable core [2023-01-28 05:26:58,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:26:58,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:26:58,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 05:26:59,104 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:59,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:26:59,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:26:59,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-28 05:26:59,328 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 10 treesize of output 3 [2023-01-28 05:26:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:26:59,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689909737] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:26:59,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:26:59,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2023-01-28 05:26:59,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129590073] [2023-01-28 05:26:59,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:26:59,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-01-28 05:26:59,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:26:59,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-01-28 05:26:59,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=2538, Unknown=6, NotChecked=0, Total=2862 [2023-01-28 05:26:59,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 05:26:59,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 155 transitions, 1701 flow. Second operand has 54 states, 54 states have (on average 68.38888888888889) internal successors, (3693), 54 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:26:59,864 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:26:59,864 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 05:26:59,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:27:03,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:27:04,800 INFO L130 PetriNetUnfolder]: 1972/3733 cut-off events. [2023-01-28 05:27:04,800 INFO L131 PetriNetUnfolder]: For 14756/14756 co-relation queries the response was YES. [2023-01-28 05:27:04,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15876 conditions, 3733 events. 1972/3733 cut-off events. For 14756/14756 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 23392 event pairs, 344 based on Foata normal form. 2/3735 useless extension candidates. Maximal degree in co-relation 15828. Up to 1521 conditions per place. [2023-01-28 05:27:04,816 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 224 selfloop transitions, 145 changer transitions 32/401 dead transitions. [2023-01-28 05:27:04,816 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 401 transitions, 4341 flow [2023-01-28 05:27:04,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-01-28 05:27:04,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-01-28 05:27:04,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3121 transitions. [2023-01-28 05:27:04,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32402408637873753 [2023-01-28 05:27:04,824 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3121 transitions. [2023-01-28 05:27:04,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3121 transitions. [2023-01-28 05:27:04,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:27:04,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3121 transitions. [2023-01-28 05:27:04,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 72.5813953488372) internal successors, (3121), 43 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:04,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 224.0) internal successors, (9856), 44 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:04,832 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 224.0) internal successors, (9856), 44 states have internal predecessors, (9856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:04,832 INFO L175 Difference]: Start difference. First operand has 158 places, 155 transitions, 1701 flow. Second operand 43 states and 3121 transitions. [2023-01-28 05:27:04,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 401 transitions, 4341 flow [2023-01-28 05:27:04,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 401 transitions, 4259 flow, removed 28 selfloop flow, removed 12 redundant places. [2023-01-28 05:27:04,954 INFO L231 Difference]: Finished difference. Result has 205 places, 227 transitions, 3075 flow [2023-01-28 05:27:04,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=1619, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=3075, PETRI_PLACES=205, PETRI_TRANSITIONS=227} [2023-01-28 05:27:04,955 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 186 predicate places. [2023-01-28 05:27:04,955 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 227 transitions, 3075 flow [2023-01-28 05:27:04,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 68.38888888888889) internal successors, (3693), 54 states have internal predecessors, (3693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:04,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:27:04,955 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:27:04,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 05:27:05,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:27:05,160 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:27:05,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:27:05,161 INFO L85 PathProgramCache]: Analyzing trace with hash -452302454, now seen corresponding path program 17 times [2023-01-28 05:27:05,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:27:05,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421331183] [2023-01-28 05:27:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:27:05,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:27:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:27:05,279 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 05:27:05,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:27:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421331183] [2023-01-28 05:27:05,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421331183] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:27:05,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985774232] [2023-01-28 05:27:05,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:27:05,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:27:05,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:27:05,281 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:27:05,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 05:27:05,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 05:27:05,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:27:05,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 16 conjunts are in the unsatisfiable core [2023-01-28 05:27:05,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:27:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-01-28 05:27:05,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:27:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-01-28 05:27:05,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985774232] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:27:05,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:27:05,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 12] total 19 [2023-01-28 05:27:05,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471495232] [2023-01-28 05:27:05,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:27:05,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 05:27:05,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:27:05,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 05:27:05,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2023-01-28 05:27:05,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 224 [2023-01-28 05:27:05,602 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 227 transitions, 3075 flow. Second operand has 20 states, 20 states have (on average 100.5) internal successors, (2010), 20 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:05,602 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:27:05,602 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 224 [2023-01-28 05:27:05,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:27:06,679 INFO L130 PetriNetUnfolder]: 4192/7822 cut-off events. [2023-01-28 05:27:06,679 INFO L131 PetriNetUnfolder]: For 56191/56191 co-relation queries the response was YES. [2023-01-28 05:27:06,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37122 conditions, 7822 events. 4192/7822 cut-off events. For 56191/56191 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 56902 event pairs, 1160 based on Foata normal form. 24/7846 useless extension candidates. Maximal degree in co-relation 37056. Up to 3191 conditions per place. [2023-01-28 05:27:06,714 INFO L137 encePairwiseOnDemand]: 221/224 looper letters, 143 selfloop transitions, 263 changer transitions 19/425 dead transitions. [2023-01-28 05:27:06,714 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 425 transitions, 6962 flow [2023-01-28 05:27:06,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-01-28 05:27:06,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-01-28 05:27:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 857 transitions. [2023-01-28 05:27:06,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47823660714285715 [2023-01-28 05:27:06,716 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 857 transitions. [2023-01-28 05:27:06,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 857 transitions. [2023-01-28 05:27:06,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:27:06,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 857 transitions. [2023-01-28 05:27:06,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 107.125) internal successors, (857), 8 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:06,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 224.0) internal successors, (2016), 9 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:06,718 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 224.0) internal successors, (2016), 9 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:06,718 INFO L175 Difference]: Start difference. First operand has 205 places, 227 transitions, 3075 flow. Second operand 8 states and 857 transitions. [2023-01-28 05:27:06,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 425 transitions, 6962 flow [2023-01-28 05:27:06,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 425 transitions, 6775 flow, removed 47 selfloop flow, removed 24 redundant places. [2023-01-28 05:27:06,826 INFO L231 Difference]: Finished difference. Result has 188 places, 359 transitions, 6072 flow [2023-01-28 05:27:06,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=2908, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6072, PETRI_PLACES=188, PETRI_TRANSITIONS=359} [2023-01-28 05:27:06,826 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 169 predicate places. [2023-01-28 05:27:06,826 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 359 transitions, 6072 flow [2023-01-28 05:27:06,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.5) internal successors, (2010), 20 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:06,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:27:06,827 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:27:06,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 05:27:07,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:27:07,033 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:27:07,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:27:07,033 INFO L85 PathProgramCache]: Analyzing trace with hash -864115185, now seen corresponding path program 18 times [2023-01-28 05:27:07,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:27:07,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857168232] [2023-01-28 05:27:07,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:27:07,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:27:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:27:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:27:08,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:27:08,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857168232] [2023-01-28 05:27:08,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857168232] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:27:08,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735816615] [2023-01-28 05:27:08,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:27:08,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:27:08,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:27:08,689 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:27:08,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 05:27:09,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-28 05:27:09,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:27:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 29 conjunts are in the unsatisfiable core [2023-01-28 05:27:09,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:27:09,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:27:09,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 05:27:09,760 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-01-28 05:27:09,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:27:09,775 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_767 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_767) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)) 5)) is different from false [2023-01-28 05:27:09,788 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:27:09,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-28 05:27:09,790 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 10 treesize of output 3 [2023-01-28 05:27:09,921 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 55 trivial. 4 not checked. [2023-01-28 05:27:09,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735816615] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:27:09,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:27:09,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 9] total 33 [2023-01-28 05:27:09,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168862612] [2023-01-28 05:27:09,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:27:09,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 05:27:09,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:27:09,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 05:27:09,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1001, Unknown=1, NotChecked=64, Total=1190 [2023-01-28 05:27:09,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 05:27:09,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 359 transitions, 6072 flow. Second operand has 35 states, 35 states have (on average 68.48571428571428) internal successors, (2397), 35 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:09,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:27:09,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 05:27:09,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:27:12,489 INFO L130 PetriNetUnfolder]: 4522/8344 cut-off events. [2023-01-28 05:27:12,490 INFO L131 PetriNetUnfolder]: For 53719/53719 co-relation queries the response was YES. [2023-01-28 05:27:12,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42396 conditions, 8344 events. 4522/8344 cut-off events. For 53719/53719 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 60559 event pairs, 895 based on Foata normal form. 36/8380 useless extension candidates. Maximal degree in co-relation 42332. Up to 4191 conditions per place. [2023-01-28 05:27:12,528 INFO L137 encePairwiseOnDemand]: 216/224 looper letters, 275 selfloop transitions, 189 changer transitions 25/489 dead transitions. [2023-01-28 05:27:12,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 489 transitions, 8358 flow [2023-01-28 05:27:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-01-28 05:27:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-01-28 05:27:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2265 transitions. [2023-01-28 05:27:12,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3159877232142857 [2023-01-28 05:27:12,531 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2265 transitions. [2023-01-28 05:27:12,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2265 transitions. [2023-01-28 05:27:12,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:27:12,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2265 transitions. [2023-01-28 05:27:12,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 70.78125) internal successors, (2265), 32 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:12,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 224.0) internal successors, (7392), 33 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:12,536 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 224.0) internal successors, (7392), 33 states have internal predecessors, (7392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:12,537 INFO L175 Difference]: Start difference. First operand has 188 places, 359 transitions, 6072 flow. Second operand 32 states and 2265 transitions. [2023-01-28 05:27:12,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 489 transitions, 8358 flow [2023-01-28 05:27:12,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 489 transitions, 7921 flow, removed 209 selfloop flow, removed 4 redundant places. [2023-01-28 05:27:12,809 INFO L231 Difference]: Finished difference. Result has 198 places, 402 transitions, 6981 flow [2023-01-28 05:27:12,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6981, PETRI_PLACES=198, PETRI_TRANSITIONS=402} [2023-01-28 05:27:12,809 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 179 predicate places. [2023-01-28 05:27:12,809 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 402 transitions, 6981 flow [2023-01-28 05:27:12,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 68.48571428571428) internal successors, (2397), 35 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:12,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:27:12,810 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:27:12,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 05:27:13,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:27:13,017 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:27:13,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:27:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash -787424844, now seen corresponding path program 19 times [2023-01-28 05:27:13,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:27:13,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525510092] [2023-01-28 05:27:13,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:27:13,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:27:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:27:13,792 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:27:13,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:27:13,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525510092] [2023-01-28 05:27:13,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525510092] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:27:13,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400936599] [2023-01-28 05:27:13,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:27:13,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:27:13,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:27:13,797 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:27:13,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 05:27:13,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:27:13,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 57 conjunts are in the unsatisfiable core [2023-01-28 05:27:13,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:27:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:27:14,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 05:27:14,488 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:27:14,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:27:14,700 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:27:14,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-28 05:27:14,702 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 10 treesize of output 3 [2023-01-28 05:27:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:27:15,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400936599] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:27:15,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:27:15,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2023-01-28 05:27:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014398120] [2023-01-28 05:27:15,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:27:15,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-01-28 05:27:15,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:27:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-01-28 05:27:15,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=3485, Unknown=2, NotChecked=0, Total=3906 [2023-01-28 05:27:15,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 05:27:15,308 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 402 transitions, 6981 flow. Second operand has 63 states, 63 states have (on average 68.33333333333333) internal successors, (4305), 63 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:27:15,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:27:15,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 05:27:15,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:27:16,863 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_818 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_818) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 20)))) (= 5 c_~x~0)) is different from false [2023-01-28 05:27:19,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-01-28 05:28:03,042 INFO L130 PetriNetUnfolder]: 22314/40894 cut-off events. [2023-01-28 05:28:03,043 INFO L131 PetriNetUnfolder]: For 294196/294196 co-relation queries the response was YES. [2023-01-28 05:28:03,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216291 conditions, 40894 events. 22314/40894 cut-off events. For 294196/294196 co-relation queries the response was YES. Maximal size of possible extension queue 1713. Compared 381957 event pairs, 1672 based on Foata normal form. 140/41034 useless extension candidates. Maximal degree in co-relation 216226. Up to 16723 conditions per place. [2023-01-28 05:28:03,528 INFO L137 encePairwiseOnDemand]: 213/224 looper letters, 2458 selfloop transitions, 1781 changer transitions 546/4785 dead transitions. [2023-01-28 05:28:03,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 4785 transitions, 61094 flow [2023-01-28 05:28:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 437 states. [2023-01-28 05:28:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2023-01-28 05:28:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 32973 transitions. [2023-01-28 05:28:03,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33684414841451454 [2023-01-28 05:28:03,589 INFO L72 ComplementDD]: Start complementDD. Operand 437 states and 32973 transitions. [2023-01-28 05:28:03,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 437 states and 32973 transitions. [2023-01-28 05:28:03,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:28:03,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 437 states and 32973 transitions. [2023-01-28 05:28:03,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 438 states, 437 states have (on average 75.45308924485126) internal successors, (32973), 437 states have internal predecessors, (32973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:28:03,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 438 states, 438 states have (on average 224.0) internal successors, (98112), 438 states have internal predecessors, (98112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:28:03,729 INFO L81 ComplementDD]: Finished complementDD. Result has 438 states, 438 states have (on average 224.0) internal successors, (98112), 438 states have internal predecessors, (98112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:28:03,729 INFO L175 Difference]: Start difference. First operand has 198 places, 402 transitions, 6981 flow. Second operand 437 states and 32973 transitions. [2023-01-28 05:28:03,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 4785 transitions, 61094 flow [2023-01-28 05:28:05,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 4785 transitions, 60629 flow, removed 117 selfloop flow, removed 17 redundant places. [2023-01-28 05:28:05,302 INFO L231 Difference]: Finished difference. Result has 772 places, 2076 transitions, 41458 flow [2023-01-28 05:28:05,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=6726, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=437, PETRI_FLOW=41458, PETRI_PLACES=772, PETRI_TRANSITIONS=2076} [2023-01-28 05:28:05,302 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 753 predicate places. [2023-01-28 05:28:05,303 INFO L495 AbstractCegarLoop]: Abstraction has has 772 places, 2076 transitions, 41458 flow [2023-01-28 05:28:05,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 68.33333333333333) internal successors, (4305), 63 states have internal predecessors, (4305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:28:05,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:28:05,304 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:28:05,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 05:28:05,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:28:05,508 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:28:05,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:28:05,508 INFO L85 PathProgramCache]: Analyzing trace with hash 2071333556, now seen corresponding path program 20 times [2023-01-28 05:28:05,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:28:05,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56684016] [2023-01-28 05:28:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:28:05,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:28:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:28:07,006 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:28:07,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:28:07,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56684016] [2023-01-28 05:28:07,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56684016] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:28:07,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753008262] [2023-01-28 05:28:07,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:28:07,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:28:07,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:28:07,008 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:28:07,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 05:28:07,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:28:07,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:28:07,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 05:28:07,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:28:07,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-01-28 05:28:07,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-01-28 05:28:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:28:07,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:28:07,739 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_885 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_885) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2023-01-28 05:28:07,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:28:07,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-01-28 05:28:07,753 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 10 treesize of output 3 [2023-01-28 05:28:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 55 trivial. 4 not checked. [2023-01-28 05:28:07,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753008262] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:28:07,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:28:07,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 11] total 46 [2023-01-28 05:28:07,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573624630] [2023-01-28 05:28:07,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:28:07,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-01-28 05:28:07,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:28:07,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-01-28 05:28:07,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1981, Unknown=1, NotChecked=90, Total=2256 [2023-01-28 05:28:07,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 224 [2023-01-28 05:28:07,970 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 772 places, 2076 transitions, 41458 flow. Second operand has 48 states, 48 states have (on average 68.39583333333333) internal successors, (3283), 48 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:28:07,970 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:28:07,970 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 224 [2023-01-28 05:28:07,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:28:32,397 INFO L130 PetriNetUnfolder]: 22934/41911 cut-off events. [2023-01-28 05:28:32,398 INFO L131 PetriNetUnfolder]: For 3555390/3555390 co-relation queries the response was YES. [2023-01-28 05:28:33,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284799 conditions, 41911 events. 22934/41911 cut-off events. For 3555390/3555390 co-relation queries the response was YES. Maximal size of possible extension queue 1835. Compared 394035 event pairs, 5701 based on Foata normal form. 96/42007 useless extension candidates. Maximal degree in co-relation 284580. Up to 25088 conditions per place. [2023-01-28 05:28:33,805 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 1609 selfloop transitions, 677 changer transitions 34/2320 dead transitions. [2023-01-28 05:28:33,805 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 2320 transitions, 49173 flow [2023-01-28 05:28:33,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-01-28 05:28:33,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-01-28 05:28:33,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2553 transitions. [2023-01-28 05:28:33,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3165922619047619 [2023-01-28 05:28:33,807 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2553 transitions. [2023-01-28 05:28:33,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2553 transitions. [2023-01-28 05:28:33,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:28:33,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2553 transitions. [2023-01-28 05:28:33,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 70.91666666666667) internal successors, (2553), 36 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:28:33,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 224.0) internal successors, (8288), 37 states have internal predecessors, (8288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:28:33,814 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 224.0) internal successors, (8288), 37 states have internal predecessors, (8288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:28:33,814 INFO L175 Difference]: Start difference. First operand has 772 places, 2076 transitions, 41458 flow. Second operand 36 states and 2553 transitions. [2023-01-28 05:28:33,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 2320 transitions, 49173 flow [2023-01-28 05:29:01,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 795 places, 2320 transitions, 35574 flow, removed 6785 selfloop flow, removed 12 redundant places. [2023-01-28 05:29:01,296 INFO L231 Difference]: Finished difference. Result has 796 places, 2118 transitions, 31117 flow [2023-01-28 05:29:01,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=28345, PETRI_DIFFERENCE_MINUEND_PLACES=760, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=634, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31117, PETRI_PLACES=796, PETRI_TRANSITIONS=2118} [2023-01-28 05:29:01,298 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 777 predicate places. [2023-01-28 05:29:01,298 INFO L495 AbstractCegarLoop]: Abstraction has has 796 places, 2118 transitions, 31117 flow [2023-01-28 05:29:01,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 68.39583333333333) internal successors, (3283), 48 states have internal predecessors, (3283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:01,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:29:01,299 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:29:01,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 05:29:01,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 05:29:01,504 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:29:01,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:29:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash -952162406, now seen corresponding path program 21 times [2023-01-28 05:29:01,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:29:01,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35424835] [2023-01-28 05:29:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:29:01,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:29:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:29:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:29:02,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:29:02,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35424835] [2023-01-28 05:29:02,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35424835] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:29:02,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30246695] [2023-01-28 05:29:02,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:29:02,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:29:02,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:29:02,252 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:29:02,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 05:29:02,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 05:29:02,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:29:02,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 05:29:02,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:29:03,187 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 05:29:03,187 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 23 treesize of output 10 [2023-01-28 05:29:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:29:03,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:29:03,481 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 05:29:03,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-01-28 05:29:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-01-28 05:29:03,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30246695] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:29:03,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:29:03,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 50 [2023-01-28 05:29:03,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327108210] [2023-01-28 05:29:03,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:29:03,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-01-28 05:29:03,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:29:03,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-01-28 05:29:03,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=2162, Unknown=0, NotChecked=0, Total=2652 [2023-01-28 05:29:03,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 05:29:03,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 2118 transitions, 31117 flow. Second operand has 52 states, 52 states have (on average 72.5) internal successors, (3770), 52 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:03,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:29:03,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 05:29:03,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:29:26,236 INFO L130 PetriNetUnfolder]: 9507/17692 cut-off events. [2023-01-28 05:29:26,237 INFO L131 PetriNetUnfolder]: For 453541/453541 co-relation queries the response was YES. [2023-01-28 05:29:26,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112408 conditions, 17692 events. 9507/17692 cut-off events. For 453541/453541 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 146839 event pairs, 3235 based on Foata normal form. 237/17929 useless extension candidates. Maximal degree in co-relation 112187. Up to 14496 conditions per place. [2023-01-28 05:29:26,519 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 748 selfloop transitions, 81 changer transitions 306/1135 dead transitions. [2023-01-28 05:29:26,520 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1135 transitions, 22378 flow [2023-01-28 05:29:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-01-28 05:29:26,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-01-28 05:29:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 5200 transitions. [2023-01-28 05:29:26,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3464818763326226 [2023-01-28 05:29:26,531 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 5200 transitions. [2023-01-28 05:29:26,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 5200 transitions. [2023-01-28 05:29:26,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:29:26,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 5200 transitions. [2023-01-28 05:29:26,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 77.61194029850746) internal successors, (5200), 67 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:26,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 224.0) internal successors, (15232), 68 states have internal predecessors, (15232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:26,543 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 224.0) internal successors, (15232), 68 states have internal predecessors, (15232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:26,543 INFO L175 Difference]: Start difference. First operand has 796 places, 2118 transitions, 31117 flow. Second operand 67 states and 5200 transitions. [2023-01-28 05:29:26,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1135 transitions, 22378 flow [2023-01-28 05:29:29,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1135 transitions, 20088 flow, removed 785 selfloop flow, removed 161 redundant places. [2023-01-28 05:29:29,110 INFO L231 Difference]: Finished difference. Result has 342 places, 747 transitions, 14879 flow [2023-01-28 05:29:29,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=15281, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=705, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=14879, PETRI_PLACES=342, PETRI_TRANSITIONS=747} [2023-01-28 05:29:29,110 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 323 predicate places. [2023-01-28 05:29:29,110 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 747 transitions, 14879 flow [2023-01-28 05:29:29,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 72.5) internal successors, (3770), 52 states have internal predecessors, (3770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:29,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:29:29,111 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:29:29,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-01-28 05:29:29,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-01-28 05:29:29,319 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:29:29,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:29:29,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1017347840, now seen corresponding path program 22 times [2023-01-28 05:29:29,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:29:29,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734100963] [2023-01-28 05:29:29,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:29:29,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:29:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:29:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:29:30,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:29:30,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734100963] [2023-01-28 05:29:30,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734100963] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:29:30,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725583244] [2023-01-28 05:29:30,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:29:30,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:29:30,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:29:30,173 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:29:30,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 05:29:30,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:29:30,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:29:30,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-01-28 05:29:30,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:29:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-01-28 05:29:30,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:29:30,703 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 05:29:30,703 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 25 treesize of output 13 [2023-01-28 05:29:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-01-28 05:29:30,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725583244] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:29:30,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:29:30,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 10] total 33 [2023-01-28 05:29:30,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327646517] [2023-01-28 05:29:30,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:29:30,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-01-28 05:29:30,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:29:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-01-28 05:29:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2023-01-28 05:29:30,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 05:29:30,732 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 747 transitions, 14879 flow. Second operand has 35 states, 35 states have (on average 72.62857142857143) internal successors, (2542), 35 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:30,732 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:29:30,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 05:29:30,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:29:46,320 INFO L130 PetriNetUnfolder]: 24768/45245 cut-off events. [2023-01-28 05:29:46,320 INFO L131 PetriNetUnfolder]: For 448017/448017 co-relation queries the response was YES. [2023-01-28 05:29:46,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276712 conditions, 45245 events. 24768/45245 cut-off events. For 448017/448017 co-relation queries the response was YES. Maximal size of possible extension queue 1921. Compared 423038 event pairs, 1372 based on Foata normal form. 88/45333 useless extension candidates. Maximal degree in co-relation 276609. Up to 22040 conditions per place. [2023-01-28 05:29:46,916 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 723 selfloop transitions, 1826 changer transitions 149/2698 dead transitions. [2023-01-28 05:29:46,916 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 2698 transitions, 53281 flow [2023-01-28 05:29:46,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-01-28 05:29:46,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2023-01-28 05:29:46,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 7892 transitions. [2023-01-28 05:29:46,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35232142857142856 [2023-01-28 05:29:46,921 INFO L72 ComplementDD]: Start complementDD. Operand 100 states and 7892 transitions. [2023-01-28 05:29:46,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 7892 transitions. [2023-01-28 05:29:46,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:29:46,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 100 states and 7892 transitions. [2023-01-28 05:29:46,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 101 states, 100 states have (on average 78.92) internal successors, (7892), 100 states have internal predecessors, (7892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:46,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 101 states, 101 states have (on average 224.0) internal successors, (22624), 101 states have internal predecessors, (22624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:46,936 INFO L81 ComplementDD]: Finished complementDD. Result has 101 states, 101 states have (on average 224.0) internal successors, (22624), 101 states have internal predecessors, (22624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:46,936 INFO L175 Difference]: Start difference. First operand has 342 places, 747 transitions, 14879 flow. Second operand 100 states and 7892 transitions. [2023-01-28 05:29:46,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 2698 transitions, 53281 flow [2023-01-28 05:29:50,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 2698 transitions, 51818 flow, removed 662 selfloop flow, removed 41 redundant places. [2023-01-28 05:29:50,053 INFO L231 Difference]: Finished difference. Result has 401 places, 2071 transitions, 46631 flow [2023-01-28 05:29:50,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=14512, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=537, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=100, PETRI_FLOW=46631, PETRI_PLACES=401, PETRI_TRANSITIONS=2071} [2023-01-28 05:29:50,054 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 382 predicate places. [2023-01-28 05:29:50,054 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 2071 transitions, 46631 flow [2023-01-28 05:29:50,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 72.62857142857143) internal successors, (2542), 35 states have internal predecessors, (2542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:29:50,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:29:50,054 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:29:50,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-01-28 05:29:50,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:29:50,260 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:29:50,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:29:50,260 INFO L85 PathProgramCache]: Analyzing trace with hash -988960160, now seen corresponding path program 23 times [2023-01-28 05:29:50,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:29:50,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195187039] [2023-01-28 05:29:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:29:50,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:29:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:29:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 1 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:29:51,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:29:51,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195187039] [2023-01-28 05:29:51,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195187039] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:29:51,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332923905] [2023-01-28 05:29:51,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:29:51,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:29:51,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:29:51,035 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:29:51,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 05:29:51,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-01-28 05:29:51,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:29:51,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 55 conjunts are in the unsatisfiable core [2023-01-28 05:29:51,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:29:51,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-01-28 05:29:51,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:29:51,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-01-28 05:29:52,052 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 05:29:52,053 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 23 treesize of output 10 [2023-01-28 05:29:52,057 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:29:52,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:30:06,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-01-28 05:30:06,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-01-28 05:30:06,385 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-01-28 05:30:06,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 300 treesize of output 271 [2023-01-28 05:30:06,397 INFO L173 IndexEqualityManager]: detected equality via solver [2023-01-28 05:30:06,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 92 treesize of output 80 [2023-01-28 05:30:06,410 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-01-28 05:30:06,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 67 [2023-01-28 05:30:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 43 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:30:06,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332923905] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:30:06,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:30:06,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 60 [2023-01-28 05:30:06,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361826647] [2023-01-28 05:30:06,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:30:06,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-01-28 05:30:06,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:30:06,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-01-28 05:30:06,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=3306, Unknown=17, NotChecked=0, Total=3782 [2023-01-28 05:30:06,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 64 out of 224 [2023-01-28 05:30:06,835 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 2071 transitions, 46631 flow. Second operand has 62 states, 62 states have (on average 65.35483870967742) internal successors, (4052), 62 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:06,835 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:30:06,835 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 64 of 224 [2023-01-28 05:30:06,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:30:29,096 INFO L130 PetriNetUnfolder]: 24627/44947 cut-off events. [2023-01-28 05:30:29,096 INFO L131 PetriNetUnfolder]: For 574753/574753 co-relation queries the response was YES. [2023-01-28 05:30:29,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292305 conditions, 44947 events. 24627/44947 cut-off events. For 574753/574753 co-relation queries the response was YES. Maximal size of possible extension queue 1811. Compared 421807 event pairs, 9896 based on Foata normal form. 1/44948 useless extension candidates. Maximal degree in co-relation 292179. Up to 43621 conditions per place. [2023-01-28 05:30:29,776 INFO L137 encePairwiseOnDemand]: 218/224 looper letters, 2008 selfloop transitions, 50 changer transitions 82/2140 dead transitions. [2023-01-28 05:30:29,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 2140 transitions, 51268 flow [2023-01-28 05:30:29,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 05:30:29,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 05:30:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1579 transitions. [2023-01-28 05:30:29,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30648291925465837 [2023-01-28 05:30:29,778 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1579 transitions. [2023-01-28 05:30:29,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1579 transitions. [2023-01-28 05:30:29,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:30:29,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1579 transitions. [2023-01-28 05:30:29,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 68.65217391304348) internal successors, (1579), 23 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:29,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:29,782 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 224.0) internal successors, (5376), 24 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:29,782 INFO L175 Difference]: Start difference. First operand has 401 places, 2071 transitions, 46631 flow. Second operand 23 states and 1579 transitions. [2023-01-28 05:30:29,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 2140 transitions, 51268 flow [2023-01-28 05:30:38,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 2140 transitions, 44995 flow, removed 1660 selfloop flow, removed 28 redundant places. [2023-01-28 05:30:38,174 INFO L231 Difference]: Finished difference. Result has 381 places, 2054 transitions, 40185 flow [2023-01-28 05:30:38,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=40358, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2021, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=40185, PETRI_PLACES=381, PETRI_TRANSITIONS=2054} [2023-01-28 05:30:38,178 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 362 predicate places. [2023-01-28 05:30:38,178 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 2054 transitions, 40185 flow [2023-01-28 05:30:38,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 65.35483870967742) internal successors, (4052), 62 states have internal predecessors, (4052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:38,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:30:38,179 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:30:38,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-01-28 05:30:38,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:30:38,385 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:30:38,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:30:38,385 INFO L85 PathProgramCache]: Analyzing trace with hash -360659949, now seen corresponding path program 24 times [2023-01-28 05:30:38,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:30:38,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362562275] [2023-01-28 05:30:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:30:38,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:30:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:30:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 1 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:30:40,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:30:40,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362562275] [2023-01-28 05:30:40,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362562275] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:30:40,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900508290] [2023-01-28 05:30:40,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:30:40,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:30:40,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:30:40,541 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:30:40,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 05:30:40,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-01-28 05:30:40,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:30:40,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 34 conjunts are in the unsatisfiable core [2023-01-28 05:30:40,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:30:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-01-28 05:30:41,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:30:41,195 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 05:30:41,195 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 25 treesize of output 13 [2023-01-28 05:30:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-01-28 05:30:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900508290] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:30:41,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:30:41,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 31 [2023-01-28 05:30:41,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707641120] [2023-01-28 05:30:41,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:30:41,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 05:30:41,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:30:41,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 05:30:41,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 05:30:41,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 05:30:41,219 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 2054 transitions, 40185 flow. Second operand has 33 states, 33 states have (on average 72.60606060606061) internal successors, (2396), 33 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:30:41,220 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:30:41,220 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 05:30:41,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:31:44,988 INFO L130 PetriNetUnfolder]: 59999/109379 cut-off events. [2023-01-28 05:31:44,988 INFO L131 PetriNetUnfolder]: For 2452148/2452148 co-relation queries the response was YES. [2023-01-28 05:31:46,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 696898 conditions, 109379 events. 59999/109379 cut-off events. For 2452148/2452148 co-relation queries the response was YES. Maximal size of possible extension queue 5269. Compared 1153558 event pairs, 1139 based on Foata normal form. 441/109820 useless extension candidates. Maximal degree in co-relation 696773. Up to 52789 conditions per place. [2023-01-28 05:31:47,164 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 1640 selfloop transitions, 4975 changer transitions 284/6899 dead transitions. [2023-01-28 05:31:47,164 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 6899 transitions, 142633 flow [2023-01-28 05:31:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 258 states. [2023-01-28 05:31:47,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2023-01-28 05:31:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 20575 transitions. [2023-01-28 05:31:47,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35601813399778515 [2023-01-28 05:31:47,175 INFO L72 ComplementDD]: Start complementDD. Operand 258 states and 20575 transitions. [2023-01-28 05:31:47,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 258 states and 20575 transitions. [2023-01-28 05:31:47,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:31:47,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 258 states and 20575 transitions. [2023-01-28 05:31:47,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 259 states, 258 states have (on average 79.74806201550388) internal successors, (20575), 258 states have internal predecessors, (20575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:31:47,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 259 states, 259 states have (on average 224.0) internal successors, (58016), 259 states have internal predecessors, (58016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:31:47,368 INFO L81 ComplementDD]: Finished complementDD. Result has 259 states, 259 states have (on average 224.0) internal successors, (58016), 259 states have internal predecessors, (58016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:31:47,368 INFO L175 Difference]: Start difference. First operand has 381 places, 2054 transitions, 40185 flow. Second operand 258 states and 20575 transitions. [2023-01-28 05:31:47,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 6899 transitions, 142633 flow [2023-01-28 05:32:13,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 6899 transitions, 142222 flow, removed 129 selfloop flow, removed 11 redundant places. [2023-01-28 05:32:13,402 INFO L231 Difference]: Finished difference. Result has 725 places, 5103 transitions, 120210 flow [2023-01-28 05:32:13,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=40029, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2054, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1950, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=258, PETRI_FLOW=120210, PETRI_PLACES=725, PETRI_TRANSITIONS=5103} [2023-01-28 05:32:13,404 INFO L281 CegarLoopForPetriNet]: 19 programPoint places, 706 predicate places. [2023-01-28 05:32:13,404 INFO L495 AbstractCegarLoop]: Abstraction has has 725 places, 5103 transitions, 120210 flow [2023-01-28 05:32:13,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 72.60606060606061) internal successors, (2396), 33 states have internal predecessors, (2396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:32:13,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:32:13,405 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:32:13,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-01-28 05:32:13,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 05:32:13,616 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:32:13,616 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:32:13,616 INFO L85 PathProgramCache]: Analyzing trace with hash -360090301, now seen corresponding path program 25 times [2023-01-28 05:32:13,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:32:13,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877654237] [2023-01-28 05:32:13,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:32:13,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:32:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:32:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:32:14,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:32:14,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877654237] [2023-01-28 05:32:14,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877654237] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:32:14,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439009054] [2023-01-28 05:32:14,585 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:32:14,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:32:14,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:32:14,586 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:32:14,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 05:32:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:32:14,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 50 conjunts are in the unsatisfiable core [2023-01-28 05:32:14,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:32:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-01-28 05:32:15,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:32:15,227 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-01-28 05:32:15,228 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 25 treesize of output 13 [2023-01-28 05:32:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-01-28 05:32:15,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439009054] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:32:15,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:32:15,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 12] total 38 [2023-01-28 05:32:15,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757347054] [2023-01-28 05:32:15,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:32:15,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-01-28 05:32:15,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:32:15,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-01-28 05:32:15,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2023-01-28 05:32:15,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 224 [2023-01-28 05:32:15,253 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 725 places, 5103 transitions, 120210 flow. Second operand has 40 states, 40 states have (on average 72.5) internal successors, (2900), 40 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:32:15,253 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:32:15,253 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 224 [2023-01-28 05:32:15,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:35:45,023 INFO L130 PetriNetUnfolder]: 89719/163139 cut-off events. [2023-01-28 05:35:45,023 INFO L131 PetriNetUnfolder]: For 17247707/17247707 co-relation queries the response was YES. [2023-01-28 05:35:51,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1130113 conditions, 163139 events. 89719/163139 cut-off events. For 17247707/17247707 co-relation queries the response was YES. Maximal size of possible extension queue 7951. Compared 1809640 event pairs, 2202 based on Foata normal form. 619/163758 useless extension candidates. Maximal degree in co-relation 1129862. Up to 78855 conditions per place. [2023-01-28 05:35:51,618 INFO L137 encePairwiseOnDemand]: 217/224 looper letters, 506 selfloop transitions, 7636 changer transitions 277/8419 dead transitions. [2023-01-28 05:35:51,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 836 places, 8419 transitions, 206268 flow [2023-01-28 05:35:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-01-28 05:35:51,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2023-01-28 05:35:51,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 8801 transitions. [2023-01-28 05:35:51,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35080516581632654 [2023-01-28 05:35:51,623 INFO L72 ComplementDD]: Start complementDD. Operand 112 states and 8801 transitions. [2023-01-28 05:35:51,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 8801 transitions. [2023-01-28 05:35:51,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:35:51,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 112 states and 8801 transitions. [2023-01-28 05:35:51,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 113 states, 112 states have (on average 78.58035714285714) internal successors, (8801), 112 states have internal predecessors, (8801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:35:51,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 113 states, 113 states have (on average 224.0) internal successors, (25312), 113 states have internal predecessors, (25312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:35:51,643 INFO L81 ComplementDD]: Finished complementDD. Result has 113 states, 113 states have (on average 224.0) internal successors, (25312), 113 states have internal predecessors, (25312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:35:51,644 INFO L175 Difference]: Start difference. First operand has 725 places, 5103 transitions, 120210 flow. Second operand 112 states and 8801 transitions. [2023-01-28 05:35:51,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 836 places, 8419 transitions, 206268 flow Received shutdown request... [2023-01-28 05:36:49,837 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 05:36:49,851 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:36:49,851 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-01-28 05:36:49,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 05:36:50,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 05:36:50,043 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-01-28 05:36:50,044 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 05:36:50,044 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 05:36:50,045 INFO L445 BasicCegarLoop]: Path program histogram: [25, 1, 1, 1] [2023-01-28 05:36:50,048 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 05:36:50,048 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 05:36:50,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 05:36:50 BasicIcfg [2023-01-28 05:36:50,050 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 05:36:50,050 INFO L158 Benchmark]: Toolchain (without parser) took 732258.05ms. Allocated memory was 337.6MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 306.8MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 7.7GB. Max. memory is 16.0GB. [2023-01-28 05:36:50,051 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory is still 214.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 05:36:50,051 INFO L158 Benchmark]: CACSL2BoogieTranslator took 155.31ms. Allocated memory is still 337.6MB. Free memory was 306.4MB in the beginning and 295.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 05:36:50,051 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.81ms. Allocated memory is still 337.6MB. Free memory was 295.2MB in the beginning and 293.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 05:36:50,051 INFO L158 Benchmark]: Boogie Preprocessor took 18.84ms. Allocated memory is still 337.6MB. Free memory was 293.5MB in the beginning and 292.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 05:36:50,051 INFO L158 Benchmark]: RCFGBuilder took 483.26ms. Allocated memory is still 337.6MB. Free memory was 291.8MB in the beginning and 271.8MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-28 05:36:50,051 INFO L158 Benchmark]: TraceAbstraction took 731571.88ms. Allocated memory was 337.6MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 271.2MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 7.7GB. Max. memory is 16.0GB. [2023-01-28 05:36:50,052 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 255.9MB. Free memory is still 214.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 155.31ms. Allocated memory is still 337.6MB. Free memory was 306.4MB in the beginning and 295.2MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.81ms. Allocated memory is still 337.6MB. Free memory was 295.2MB in the beginning and 293.5MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 18.84ms. Allocated memory is still 337.6MB. Free memory was 293.5MB in the beginning and 292.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 483.26ms. Allocated memory is still 337.6MB. Free memory was 291.8MB in the beginning and 271.8MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 731571.88ms. Allocated memory was 337.6MB in the beginning and 10.0GB in the end (delta: 9.6GB). Free memory was 271.2MB in the beginning and 3.5GB in the end (delta: -3.2GB). Peak memory consumption was 7.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.8s, 103 PlacesBefore, 19 PlacesAfterwards, 105 TransitionsBefore, 15 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 7 FixpointIterations, 65 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 13 TrivialYvCompositions, 6 ConcurrentYvCompositions, 6 ChoiceCompositions, 109 TotalNumberOfCompositions, 467 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 467, independent: 462, independent conditional: 0, independent unconditional: 462, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 258, independent: 257, independent conditional: 0, independent unconditional: 257, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 467, independent: 205, independent conditional: 0, independent unconditional: 205, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 258, unknown conditional: 0, unknown unconditional: 258] , Statistics on independence cache: Total cache size (in pairs): 14, Positive cache size: 13, Positive conditional cache size: 0, Positive unconditional cache size: 13, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 80]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 125 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 731.5s, OverallIterations: 28, TraceHistogramMax: 10, PathProgramHistogramMax: 25, EmptinessCheckTime: 0.0s, AutomataDifference: 672.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 232 mSolverCounterUnknown, 9260 SdHoareTripleChecker+Valid, 91.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9260 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 86.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1246 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 810 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 73986 IncrementalHoareTripleChecker+Invalid, 76274 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 810 mSolverCounterUnsat, 0 mSDtfsCounter, 73986 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2901 GetRequests, 726 SyntacticMatches, 1 SemanticMatches, 2174 ConstructedPredicates, 5 IntricatePredicates, 16 DeprecatedPredicates, 143850 ImplicationChecksByTransitivity, 131.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120210occurred in iteration=27, InterpolantAutomatonStates: 1499, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 45.5s InterpolantComputationTime, 1235 NumberOfCodeBlocks, 1233 NumberOfCodeBlocksAsserted, 90 NumberOfCheckSat, 1755 ConstructedInterpolants, 87 QuantifiedInterpolants, 22627 SizeOfPredicates, 288 NumberOfNonLiveVariables, 6408 ConjunctsInSsa, 857 ConjunctsInUnsatCore, 78 InterpolantComputations, 3 PerfectInterpolantSequences, 696/2718 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown [2023-01-28 05:36:50,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 !ENTRY org.eclipse.osgi 4 0 2023-01-28 05:36:50.305 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83743e7a4/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438) An error has occurred. See the log file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83743e7a4/.metadata/.log.